Technical field
[0001]
　The present invention relates to an illumination device for illuminating a predetermined illumination range using a coherent light.
Background technique
[0002]
　Laser light source, a long service life than high-pressure mercury lamp, can reduce the size of the optical system, since the power consumption is small, the illuminating device and the projection device are spreading using a laser light source.
[0003]
　The laser light source, it is a problem that occurrence of the speckle, Patent Document 1, the traveling direction of the laser beam is changed periodically, the time the incident angle of the laser light incident on each point of the illuminated region and to alter, this technique of not lighten speckles is disclosed by.
CITATION
Patent Document
[0004]
Patent Document 1: International Publication 2012/033174 pamphlet
Summary of the Invention
Problems that the Invention is to Solve
[0005]
　In order to change the emission color of the illuminated area illuminated by the laser beam, or to superimpose a plurality of laser beams having different emission wavelength ranges, or by irradiating a laser beam of a specific emission wavelength range of the phosphor, it may be carried out wavelength conversion.
[0006]
　However, conventional lighting apparatus can not switch the emission color only as target the entire area illuminated by the laser beam. Therefore, change the spot to color, there is only providing a separate laser light source of small beam diameter, the configuration of the optical system of the lighting device becomes complicated.
[0007]
　An object of the present invention is to provide, without complicating the configuration of the optical system, it is to provide an arbitrary region arbitrarily changeable illumination device illuminating aspects of the illumination range.
Means for Solving the Problems
[0008]
　In order to solve the above problems, in one aspect of the present invention, a coherent light source emitting a plurality of coherent light,
　an optical element by diffusing the plurality of coherent light illuminates a prescribed illumination range,
　said plurality comprising a timing controller for individually controlling the illumination timing of the incident timing or the illumination range, to the optical element of the coherent light, of,
　the optical element is provided corresponding to each of the plurality of coherent light has a plurality of diffusion regions corresponding coherent light is incident,
　each of the plurality of diffusion regions, by diffusion of the incident coherent light, is capable illuminating the illumination range,
　said plurality of diffusion regions each have a plurality of elements diffusion regions,
　each of the plurality of element diffusion region, the diffusion of the incident coherent light, Illuminating the subregion in serial illumination range,
　at least a part of the partial area illuminated by each of said plurality of elements diffusion region, the illumination device is provided which are different, respectively.
[0009]
　Wherein the plurality of coherent light emitted by the coherent light source, the emission wavelength range may be different respectively.
[0010]
　The plurality of coherent light emitted by the coherent light source may comprise a scanning unit that scans on said optical element.
[0011]
　The scanning unit, the traveling direction of the plurality of coherent light emitted by the coherent light source may comprise an optical scanning member for periodically changing.
[0012]
　The optical scanning member, the plurality of coherent light from the coherent light source, the cyclically scanned over the incident surface of the optical element,
　the timing controller, the scan of the plurality of coherent light by the optical scanning member in synchronization with the timing, the illumination timing of the incident timing or the illumination range, to the optical element of the plurality of coherent light may be controlled individually.
[0013]
　The timing controller such that said illumination mode of the illumination range is changed periodically or temporarily, in synchronization with the scanning timing of the plurality of coherent light by the optical scanning element, the optical of the plurality of coherent light the incident timing or lighting timing of the illumination range, to the element may be controlled individually.
[0014]
　The timing controller, the so selected arbitrary regions in the illumination range and the other area in the illumination range is different illumination mode from each other, the incident timing of the said optical elements of said plurality of coherent light or lighting timing of the illumination range may be individually controlled.
[0015]
　The timing controller, the so selected arbitrary regions in the illumination range is illuminated in a color different from that of the other area in the illumination range, the incident timing of the said optical elements of said plurality of coherent light or lighting timing of the illumination range may be individually controlled.
[0016]
　The timing controller, as only selected arbitrary regions within the illumination range of the illumination range is not illuminated, the plurality of incident timing to the optical element of the coherent light or illumination timing of the illumination range, the may be individually controlled.
[0017]
　May comprise an object detector for detecting an object existing within the illumination range,
　the timing controller, the other regions within the region and the illumination range of the object detected by the object detection unit DOO so are different illumination mode from each other, the illumination timing of the incident timing or the illumination range, to the optical element of the plurality of coherent light may be controlled individually.
[0018]
　It may comprise an object detector for detecting an object existing within the illumination range,
　the timing control unit, at least one of the illumination mode of the said object detected by the object detecting unit and its peripheral area so they are different from the illumination aspect other area in the illumination range, the illumination timing of the incident timing or the illumination range, to the optical element of the plurality of coherent light may be controlled individually.
[0019]
　The timing controller, a light emission timing of the plurality of coherent light which the coherent light source emits light may be individually controlled.
[0020]
　The optical element may be a hologram recording medium,
　each of said plurality of elements diffusion region may be an element hologram area where the interference fringe pattern is formed which differ respectively.
[0021]
　The optical element may be a lens array unit having a plurality of lens arrays,
　each of said plurality of elements diffusion region may have the lens array.
Effect of the Invention
[0022]
　According to the present invention, without complicating the configuration of the optical system, it can provide any area arbitrarily changeable illumination device illuminating aspects of the illumination range.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023]
[1] Figure showing a schematic configuration of a lighting apparatus according to an embodiment of the present invention.
[2] diagram illustrating an optical scanning member.
It shows how the [3] laser light diffused by the optical element is incident on the illuminated area.
[4] shows an example in which different from the illumination color of the other portions of the illumination color illuminated area of the central portion of the illuminated area.
[5] shows an example of the non-illuminated only the central portion of the illuminated area.
[6] The three diagrams arranged adjacent the hologram area along the incidence surface of the hologram recording medium.
[7] FIG three hologram regions arranged in the stacking direction.
[8] shows the schematic configuration of a lighting apparatus according to a second embodiment of the present invention.
[9] and (a) (b) is a diagram showing an illumination range that is illuminated with the illumination apparatus of FIG.
[10] and (a) (b) is a diagram showing an example in which the position of the image of the object projected on the illuminated area is moved.
DESCRIPTION OF THE INVENTION
[0024]
　Hereinafter, with reference to the drawings illustrating an embodiment of the present invention. In the accompanying drawings to the present specification, for convenience of easy understanding and illustration, the appropriate scale and size ratio of the vertical and horizontal, etc. are exaggerated changed from those of the real.
[0025]
　Also, as used herein, identifies the shape and geometric conditions and the degree thereof, such as "parallel", the "orthogonal", terms and the length of such "identity" and angle values ​​or the like, exact meaning without being bound, and interpreting including range that can expect a similar function.
[0026]
　(First Embodiment)
　FIG. 1 is a diagram showing a schematic configuration of a lighting apparatus 1 according to a first embodiment of the present invention. Lighting device 1 of FIG. 1 includes an irradiation device 2, and an optical element 3. Irradiation apparatus 2 includes a laser light source 4, a timing control unit 5, and a scanning unit 6.
[0027]
　The laser light source 4 includes a plurality of light sources 7 for emitting a plurality of coherent light i.e. the laser beam. The plurality of light sources 7 may be provided independently, or may be a light source module arranged side by side a plurality of light sources 7 on a common substrate. In the following description, the example in which light emission wavelength region of the plurality of coherent light is different respectively mainly emission wavelength region of the plurality of coherent light may be the same. To difference plurality of coherent light emission wavelength range, respectively, the laser light source 4 in this embodiment may have at least two light source sections 7 emission wavelength range different from each type of emission wavelength region it may be two or more. In order to increase the luminous intensity, for each emission wavelength ranges may be provided with a light source portion 7 of each plurality.
[0028]
　For example, the laser light source 4, if it has a light source section 7r of red light wavelength region, the light source portion 7g of the green light wavelength region, and a light source portion 7b of the blue light wavelength region, the light sources 7 There by superimposing the three laser beams emitted, it is possible produce white illumination light.
[0029]
　The timing control unit 5 controls the incident timing of the optical element 3 of the plurality of coherent light, or a lighting timing of the illumination range (illuminated area) 10 separately. In a more specific example, the timing controller 5 in synchronization with the scanning timing of the plurality of laser light by the scanning unit 6, the emission wavelength region is individually controlling emission timing of a plurality of laser beams differ, respectively. That is, when corresponding to a plurality of laser light emission wavelength region is different each light source parts 7 are provided, the timing controller 5, the light emission timing of emitting the laser light from the plurality of light sources 7, controlling each light source unit 7. As described above, when the laser light source 4 is capable of emitting three laser beams of red, blue and green, by controlling the emission timing of each laser beam, mixing any one or more colors of red, blue and green the illumination light combined color allows generation.
[0030]
　The timing control unit 5 may control the light emission timing of the laser light source 4, it may control the incident timing of the laser light incident on the optical element 3, or spread by the optical element 3 laser light may be controlled illumination timing for illuminating the illumination range. Hereinafter, mainly describes an example in which the timing control unit 5 controls the light emission timing of the laser light source 4.
[0031]
　The timing controller 5, whether to emit laser light from each light source unit 7, i.e. may control the light emission of the on / off, the incidence of the scanning unit 6 with the laser light emitted from the light sources 7 it may be switched whether to guide the plane. In the latter case, by providing the optical shutter unit (not shown) between each light source unit 7 and the scanning unit 6, it may be switched passage / interruption of the laser beam in the optical shutter.
[0032]
　Scanning unit 6, to scan a plurality of laser beams emitted by the light source unit 7 on the optical element 3. Scanning unit 6, the light source unit 7 is moved to the respective laser beam may be scanned over the optical element 3, it may be each laser beam by moving the optical element 3 is scanned on the optical element 3 , an optical scanning member 6a for changing the traveling direction of the laser light from the light source unit 7 is provided may be caused to scan the laser beam on the optical element 3. Hereinafter, the scanning unit 6 mainly illustrates an example having an optical scanning member 6a. The timing control unit 5, as the lighting mode of the illumination range is changed periodically or temporarily, in synchronization with the scanning timing of the plurality of laser beams by the optical scanning member 6a, emission timing of each laser beam, optical element 3 the incident timing or lighting timing of the illumination range, to be controlled separately.
[0033]
　The optical scanning element 6a is over time by changing the traveling direction of the laser light from the laser light source 4, so that the traveling direction of the laser beam is not constant. As a result, the laser beam optical scanning member 6a emitted is as scans the incident surface of the optical element 3.
[0034]
　The optical scanning element 6a, for example, as shown in FIG. 2, has two rotary shafts 11 and 12 rotatable reflective device 13 around which extends in a direction crossing each other. Laser light from the laser light source 4 that is incident on the reflecting surface 13a of the reflecting device 13 is reflected at an angle corresponding to the inclination angle of the reflecting surface 13a, it travels in the direction of the incident surface 3a of the optical element 3. The reflective device 13 is rotated in two around the rotation shafts 11 and 12, the laser beam will be scanned over the incident surface 3a of the optical element 3 in two dimensions. Reflective device 13, for example, to repeat the operation of rotating the two about the rotation shafts 11 and 12 at a constant period, in synchronism with this period, the laser light on the entrance surface 3a of the optical element 3 is repeatedly scan the two-dimensional .
[0035]
　In the present embodiment, it is assumed that providing a light scanning member 6a only one, either a plurality of laser light emitted by the laser light source 4, is incident on a common optical scanning member 6a, the optical scanning the traveling direction in member 6a is provided over time is changed, it scans the optical element 3.
[0036]
　The optical element 3 has an entrance surface 3a of a plurality of laser beams are incident, a plurality of laser light incident on the incident surface 3a is diffused to illuminate a predetermined illumination range. More specifically, a plurality of laser light diffused by the optical element 3 passes through the illuminated region 10, and illuminates the illumination range is the actual illumination range 20.
[0037]
　Here, the illuminated region 10 is illuminated region of the near field illuminated overlapped by the diffusion regions 14 in the optical element 3. Illumination range of the far field, rather than the size of the actual illuminated area is often expressed as a diffusion angle distribution in the angular space. The term "illuminated area" in the present specification is intended to encompass diffusion angle range in the angular space in addition to the actual object to be irradiated area (illumination range). Therefore, the illumination range illuminated by the illuminating device of FIG. 1 can be a much wider area than the illuminated region 10 of the near field shown in Figure 1.
[0038]
　Figure 3 is a diagram showing a state in which laser light diffused by the optical element 3 is incident on the illuminated area 10. The optical element 3 has a plurality of diffusion regions 14 corresponding to the plurality of laser beams. Each diffusion region 14 corresponding laser beam is incident. Each diffusion region 14 by diffusing the laser light incident to illuminate the entire area of ​​the illuminated area 10 as a whole. Each diffusion region 14 has a plurality of elements diffusion region 15. Each element diffusion region 15 by diffusing the incident laser light illuminates a partial area of ​​the illuminated region 10. At least a portion of the partial region is different for each element diffusion region 15.
[0039]
　The optical element 3 is, for example, constituted using a holographic recording medium 16. The hologram recording medium 16, for example, as shown in FIG. 3, has a plurality of hologram regions 17. Each hologram region 17, the light emitting wavelength range is provided corresponding to each of a plurality of different laser beams respectively. Each hologram region 17 has an incident surface 17a of the corresponding laser beam is incident. Any laser light diffused is incident on the incident surface 17a of the hologram regions 17, illuminating a target area 10. For example, if the holographic recording medium 16 has a three hologram regions 17, the laser light diffused by the hologram area 17 illuminates the entire area of ​​the illuminated region 10.
[0040]
　In Figure 3, red, in association with the three laser light emitted by the blue or green, an example is shown of providing a three hologram regions 17, the hologram recording medium 16 according to the present embodiment, the light emitting wavelength range is different in association with two or more laser beams, it may have a two or more hologram regions 17. As shown in FIG. 3, when the hologram recording medium 16 is red, has three hologram regions 17 corresponding to the three laser light emitted in blue or green, each hologram region 17 illuminates the entire area of ​​the illuminated area 10 since the, in the case where three laser light is emitting light, the illuminated area 10 will be illuminated in white.
[0041]
　Size or area of ​​each hologram region 17 of the hologram recording medium 16 is not necessarily the same. Be of different sizes for each hologram region 17, the interference fringes formed on the incident surface 17a of the hologram area 17 by adjusting for each hologram region 17, each hologram region 17 common illuminated area 10 it can be illuminated.
[0042]
　Each of the plurality of hologram regions 17, having a plurality of element holograms region 18. Each of the plurality of element holograms region 18 by diffusing the incident laser light, to illuminate a partial region 19 of the illuminated region 10. At least a portion of the partial regions 19 each element hologram area 18 is illuminated is different for each element hologram area 18. That, together partial region 19 different elements hologram area 18 is illuminated, at least a portion is different.
[0043]
　Fringe pattern is formed on the incident surface 17a of the element holograms region 18. Therefore, laser light incident on the incident surface 17a of the element holograms region 18 is diffracted by the interference fringe pattern on the incident surface 17a, and illuminates the corresponding partial region 19 on the illuminated area 10. Interference fringe patterns by adjusting the various, can change the traveling direction of the laser light diffracted i.e. spread each element hologram area 18.
[0044]
　Thus, the laser beam incident on each point in each element hologram area 18 illuminates the corresponding partial region 19. Further, the optical scanning member 6a is temporally changing the incident position and the incident angle of the laser light incident on each element hologram area 18. The laser beam incident on one element hologram area 18, be incident on the position of the element hologram area 18 within the throat, to illuminate a common partial region 19. This means that the incident angle of the laser light incident on each point of the partial region 19 means that changes over time. This change in the incident angle is a non-degradable fast the human eye, as a result, the human eye, the scattering pattern of no correlation coherent light is observed are multiplexed. Thus, are averaged speckle is superimposed which is generated corresponding to the respective scattering patterns, it will be viewed by the viewer. Thus, in the illuminated area 10, speckle inconspicuous. The laser light from the optical scanning member 6a is to scan each element hologram area 18 on the hologram recording medium 16 in this order, a laser beam diffracted by each point in the element holograms region 18 have a different wavefronts respectively and, these laser beams that are superimposed independently on the illuminated region 10, uniform illuminance distribution inconspicuous speckles in the illuminated area 10 is obtained.
[0045]
　In Figure 3, each element hologram area 18, an example is shown for illuminating the different partial regions 19 of the illuminated region 10, a portion of the partial region 19 may overlap the adjacent partial regions 19 . The size of the partial region 19 may be different for each element hologram area 18. Further, according to the arrangement order of the elements hologram regions 18, corresponding partial region 19 need not be arranged in the illuminated region 10.. That is, the arrangement order of the elements hologram area 18 of each other in the hologram region 17, the arrangement order of the corresponding partial region 19 in the illuminated region 10, need not necessarily coincide.
[0046]
　Lighting device 1 according to the present embodiment, require illuminating a portion not only such illumination control in changing or illumination range illumination color of the part of the illumination range illuminated by the laser light passing through the illuminated area 10 so that it is possible to perform in accordance with the.
[0047]
　Figures 4 and 5 show an example in which different from the illumination aspect other parts of the illuminated area 10 of the illumination mode of the central portion 10a of the illuminated region 10. In this case, even in the illumination range illuminated by the laser light passing through the illuminated region 10, so that the lighting mode of the central portion is illuminated differs from the illumination aspect other than the central portion.
[0048]
　In the example of FIG. 4, the hologram recording medium 16 is red, green or have three hologram regions 17 corresponding to the three laser light emitted by the blue, the whole area in the hologram area 17 for red corresponding laser beam It is scanned, with the exception of a part in the hologram area 17 for the for blue green to scan in the corresponding laser beam. In Figure 4, in each of the hologram regions 17 illustrates a portion which does not scan the corresponding laser beam with white. These white portion corresponds to the central portion 10a of the illuminated region 10. Laser light red, for scanning the entire area of ​​the corresponding hologram regions 17, will illuminate the entire area of ​​the illuminated region 10. Laser light of green and blue, for scanning the non-void portion in the corresponding hologram area 17, illuminating the non-central portion 10a in the illuminated region 10. As a result, the central portion 10a in the illuminated area 10 is illuminated in red, the illuminated region 10 other than the central portion 10a would illumination light red, green and blue are illuminated intermingled in white.
[0049]
　On the other hand, FIG. 5, in any of the three hologram regions 17 also, the laser light other than the region corresponding to the central portion 10a of the illuminated area 10 is scanned. Therefore, the central portion 10a in the illuminated region 10 is in a non-illuminated region which is not illuminated by any color.
[0050]
　The timing controller 5, for individually controlling the emission timing of the three laser beams, by arbitrarily adjusting the light emission timing of the three laser beams, illumination anywhere in the illuminated region 10 in any color can do. If arbitrarily adjust the internal illumination mode of the illuminated region 10, in accordance with the illumination mode, arbitrary illumination any partial areas in the actual illumination area to be illuminated by the laser light passing through the illuminated area 10 It allows illumination in a manner.
[0051]
　As described above, the color of the three laser beams may be the same. Also as the color of the three laser beams are the same, according to the present embodiment can be arbitrarily changed illumination mode of any partial area 10a of the predetermined illumination range (illuminated area) 10.
[0052]
　The hologram recording medium 16, for example, the scattered light from the real scattering plate can be produced by using as the object beam. More specifically, the hologram photosensitive material is a matrix of the holographic recording medium 16 is irradiated with the reference beam and the object beam consisting of coherent light having interference with each other, the interference fringes due to the interference of these lights on the hologram photosensitive material is formed, the hologram recording medium 16 is manufactured. The reference light, the laser light is used a coherent light, as the object light, for example, scattered light cheaply available isotropic scattering plate is used.
[0053]
　By irradiating a laser beam toward the hologram recording medium 16 from the focal position of the reference beam used in making the hologram recording medium 16, scattering the object light source used in making the hologram recording medium 16 the position of the plate, the reproduced image of the scatter plate is generated. If the object the underlying scattering plate uniformly surface scattering light used in making the hologram recording medium 16, a reproduced image of the scatter plate obtained by the hologram recording medium 16 also becomes a uniform surface illumination , areas where the reproduced image is generated in this scattering plate is illuminated region 10.
[0054]
　In the present embodiment, by using the optical element 3, changing the part of the illumination color of the illumination range, and to allow the illumination control so as not to illuminate only part of the illumination range. To perform such illumination control using a holographic recording medium 16, the interference fringe pattern is complicated is formed in each element hologram area 18. Pattern of such a complex interference pattern, instead of forming using the actual object beam and the reference beam, will the reproduction illumination light wavelength and the incident direction, and, like the shape and position of the image to be reproduced it is possible to design with a basis computer. Such holographic recording medium 30 thus obtained is, computer-generated hologram (CGH: Computer Generated Hologram) also called. Further, the Fourier transform hologram may be formed by computer generated spreading angle characteristic at each point on each element hologram area 18 are the same. Further, by providing the optical member such as a lens in the optical axis rear side of the illuminated region 10 may set the size and position of the actual illumination range.
[0055]
　One advantage of the provision of the holographic recording medium 16 as an optical element 3 is that it can be reduced by diffusing the light energy density of the laser beam, also, one of the other advantages, the holographic recording medium 16 is directed to become available as a surface light source, as compared with the conventional lamp light source (point light source), it is to be lowered the brightness on the light source surface to achieve the same illuminance distribution. Fear This can contribute to improved safety of the laser beam, which gives even look into the laser light passing through the illuminated area 10 in the human eye, compared with the case of direct view of the single point light source, an adverse effect on the human eye It is reduced.
[0056]
　In the example shown in FIGS. 1 to 5, red, a hologram region 17 for green and blue, as shown in FIG. 6, are adjacent arranged along the incidence surface of each of the hologram regions 17. In Figure 6, sign a hologram region for red 17r, shows the hologram area for green sign 17g, the hologram area of ​​the blue by the reference numeral 17b.
[0057]
　Thus, in addition to the adjacent arranged along the incident surface of the three hologram regions 17, as shown in FIG. 7, it may be used a hologram recording medium 16 placed each hologram regions 17 in the stacking direction. In this case, the interference fringe pattern for each hologram region 17 is formed in a layer of the hologram area 17. As the laser beam reaches as much as possible without loss from the surface of the hologram recording medium 16 with the laser light from the optical scanning member 6a is incident to the hologram area 17 in the inner part, as possible visible light transmittance of each hologram region 17 it is desirable to high. Further, when forming the interference fringe pattern at a position overlapping in the lamination direction, since the laser light hardly reach the layer towards the surface of the back, as shown in FIG. 5, an interference fringe pattern on each layer shifted in the lamination direction to form is desirable.
[0058]
　In Figure 1, the laser light from the optical scanning member 6a is an example to diffuse through the optical element 3, the optical element 3 may be one which diffuses and reflects the laser beam. For example, when using a holographic recording medium 16 as an optical element 3, the hologram recording medium 16 may be a transmission type in the reflection type. In general, the reflection-type hologram recording medium 16 (hereinafter, the reflection-type holograms), the transmission type of hologram recording medium 16 (hereinafter, transmission-type holograms) compared to a higher wavelength selectivity. That is, the reflection-type holograms can be stacked interference fringes corresponding to the different wavelengths, it is possible to diffract the coherent light of a desired wavelength only desired layer. Also, in terms of easy removal of the influence of the 0th order light, the reflection-type holograms is excellent. On the other hand, transmission type holograms is diffracted possible spectrum is wide, but tolerance of the laser light source 4 is large, different when the stacked interference fringe patterns corresponding to the wavelength, coherent light having a desired wavelength in a layer other than the desired layer There will be diffraction. Therefore, in general, the transmission-type holograms are difficult to stack structure.
[0059]
　Further, specific forms of holographic recording medium 16, may be the volume hologram recording medium 16 using a photopolymer type volume hologram recording medium for recording using a photosensitive medium comprising a silver salt material 16 But to good, it may be holographic recording medium 16 of the relief (embossed).
[0060]
　The specific form of the optical element 3 is not limited to the holographic recording medium 16 may be a variety of diffusing member capable of finely divided into a plurality of elements diffusion region 15. For example, the lens array unit of the lens array of one each element diffusion regions 15 each may be formed of the optical element 3 with. In this case, the lens array is provided for each element the diffusion region 15, the lens array is the shape of each lens array to illuminate a partial region 19 of the illuminated region 10 is designed. Then, the position of the partial regions 19 is at least partially different. Thus, similarly to the case where the optical element 3 by using a hologram recording medium 16 can be made to changing the illumination color of only a portion of the illuminated region 10, it does not illuminate a portion only.
[0061]
　4 and 5, or to stop some lighting in the illuminated region 10, an example of changing a portion of the illumination color, changing the part of the illumination aspects of the illuminated region 10 approach It is considered in addition to these. For example, when a plurality of light sources 7 in which the laser light source 4 emits light with the same emission wavelength range, a light-emitting part of the light source portion 7 of which is stopped, the illumination of a portion of the illuminated region 10 strength may be lower than the illumination intensity of the surroundings. On the contrary, the illumination intensity of a portion of the illuminated region 10 may be higher than the illumination intensity of the ambient. It may also blink illuminate a portion of the illuminated region 10. Alternatively, it may be continuously or intermittently changing a part of the color of the illuminated region 10.
[0062]
　Thus, in the first embodiment, the optical element 3 having a plurality of diffusion regions 14 which is associated to a plurality of laser light emission wavelength region is different respectively provided, each of the diffusion regions 14 are a plurality of elements diffusion region 15 the a, each element diffusion region 15 by controlling whether or not to irradiate the laser beam at the timing control unit 5 for each element diffusion regions 15 for illuminating the subregion 19 of the illuminated region 10, the lighting mode of any region of the illuminated region 10 and the illumination mode of the other region of the illuminated region 10 can be different. For example, it is possible to make changing the illumination color of any area of ​​the illuminated region 10, it does not illuminate only any partial area 19.
[0063]
　Furthermore, since the light scanning member 6a scans the laser beam in each element diffusion region 15 within the laser beam incident on each point of each element diffusion region 15, which illuminates the entire area of ​​the corresponding partial region 19, the the incident angle of the laser beam in each partial region 19 of the illumination region 10 is to change over time, become less noticeable speckle in the illuminated region 10.
[0064]
　(Second Embodiment)
　The second embodiment described below is intended to change the illumination mode of the object existing in the illuminated region 10.
[0065]
　8 is a diagram showing a schematic configuration of a lighting apparatus 1 according to a second embodiment of the present invention, FIG. 9 is a diagram showing an illumination range 20 to be illuminated by the illumination device 1 of FIG. Lighting device 1 of FIG. 8, in addition to the configuration of the lighting device 1 of FIG. 1, and includes an object detection unit 21. Object detecting unit 21 detects an object 22 present in the illumination range illuminated by the optical element 3. In other words, the object detecting unit 21 detects an object 22 present in the illumination range 20 illuminated by laser light passing through the illuminated area 10 of FIG.
[0066]
　Object detecting unit 21 may be a sensor for detecting an object 22 optically. For example, an infrared from the sensor is irradiated to the illuminated region 10, depending on whether the reflected light is detected within the predetermined time by the sensor detects the position and size of the presence or absence and the object 22 of the object 22 it may be. Alternatively, photographed image of the illuminated region 10 with a camera, the captured image is analyzed by image recognition such as pattern matching, it may be detected and the position and size of the presence or absence and the object 22 of the object 22.
[0067]
　The timing controller 5, when the object 22 is detected by the object detection unit 21, in accordance with the position and size of the object 22, and controls the light emission timing of a plurality of light sources 7. More specifically, the timing controller 5, the image and illumination mode of the peripheral area of ​​the object 22 projected on the illuminated region 10, is different from the illumination aspect other areas of the illuminated region 10 . Accordingly, when illuminating the laser light actual illumination range 20 passing through the illuminated area 10, an illumination mode of the object 22 and the peripheral region thereof, differs from the illumination aspect other regions in the illumination range 20 it can be.
[0068]
　For example, as shown in FIG. 9 (a), the timing control unit 5 may perform a light emission control so as not to illuminate the object 22 in the illumination range 20. Thus, in the headlight of the luminaire 1, for example, a vehicle of FIG. 9 (a), when the object 22 is a human, as human within the illumination range 20 is never feel glare bathed in headlights to, the human can be prevented against the illumination light directly.
[0069]
　Alternatively, for example, as shown in FIG. 9 (b), the timing control unit 5 may perform a light emission control such as to illuminate the object 22 in the illumination range 20 in a different color. Thus, in the headlight of the luminaire 1, for example, a vehicle of FIG. 9, if the object 22 is a pedestrian, an oncoming vehicle, or the like, to illuminate the object 22 in a conspicuous color such as red, the driver of the vehicle notify me presence of an object 22, it is possible to alert the driver.
[0070]
　Lighting aspect of the object 22 is illuminated stop as in FIG. 9 (a), in addition to the illumination of a different color, such as in FIG. 9 (b), various methods are conceivable. For example, when a plurality of light sources 7 in which the laser light source 4 emits light with the same emission wavelength range, a light-emitting part of the light source portion 7 of which is stopped, the surrounding illumination intensity of the object 22 it may be lower than the illumination intensity. Or vice versa, the illumination intensity of the object 22 may be higher than the illumination intensity of the ambient. Further, the illumination of the object 22 may be switched to a blinking lighting rather than continuous illumination.
[0071]
　Thus, in the second embodiment, in accordance with the position and size of the object 22 to object detection unit 21 has detected, since the timing control unit 5 controls the light emission timing of a plurality of light sources 7, the object 22 lighting aspect, can be varied with other regions in the illumination range 20. Accordingly, or to improve the antiglare object 22, it is possible to notify clarity the presence of an object 22.
[0072]
　(Third Embodiment)
　A third embodiment is to track the object 22 in the illumination range 20. Configuration of the third embodiment is the same as FIG. 8, to detect an object 22 within the illumination range 20 by the object detection unit 21.
[0073]
　The timing controller 5, the illumination mode of the peripheral region 24 of the object 22 in the illumination range 20, in order to differ the illumination aspect other regions in the illumination range 20, emission timing of each light source part 7 of the laser light source 4 to control. The lighting mode of the peripheral region 24 of the object 22 may be illuminated in a color different from that of the peripheral area 24 other than the region of the illuminated region 10, stops the illumination only the peripheral region 24 of the illuminated region 10 may be, it may be carried out flashing illumination only the peripheral region 24 of the illuminated region 10.
[0074]
　Figure 10 (a) and FIG. 10 (b) shows an example in which the position of the image of the object 22 to be projected onto the illumination region 10 has moved. In accordance with the position of the image of the object 22, it will also change area illuminated by the different illumination modes. In this example, to be different from the illumination mode of the illuminated region 10 of it exceptional illumination mode of near total nine partial areas 19 around the partial region 19 including the object 22. In these figures, are illustrated illumination mode a total of nine partial areas 19 including the object 22 in the shadow line, this shadow lines is or have different illumination colors from other regions, in the non-illuminating region it is shown that there is.
[0075]
　As shown in FIG. 10 (b) 10 and (a), on the illuminated region 10, if the illumination mode of the peripheral region 24 of the image of the object 22 is different from the illumination mode of the other regions, the actual the lighting mode of the surrounding area of ​​the object 22 which is present on the illumination range 20, can be different from the illumination mode of the other region.
[0076]
　How the tracking of the object 22 is not limited to that shown in FIG. 10. For example, by detecting the traveling direction of the object 22, opposite to the traveling direction from the position where the object 22 is currently present, i.e., it may be illuminated only movement locus of the object 22, and vice versa, the omnidirectional that might object 22 proceeds from now may be illuminated with proactively.
[0077]
　Thus, in the third embodiment continuously detects the target object 22 in the illumination range 20, in order to differ from other regions in the illumination range 20 illumination mode of the peripheral region 24 of the object 22 , the object 22 is also moved, it is possible to track by illuminating the object 22. Thus, for example, at night, the object 22 is moving can be continuously photographed.
[0078]
　Lighting apparatus according to the first to third embodiments, not only those to be mounted on a vehicle, it may be intended to be placed in a specific location. Further, even when mounted on a vehicle, the vehicle is not limited to a vehicle, aircraft, such as airplanes, trains, ships, or in various mobile bodies, such as diving thereof.
[0079]
　Aspect of the present invention is not intended to be limited to the particular embodiments described above, which also various modifications that those skilled in the art may conceive including the effects of the present invention is not limited to what has been described above. That is, various additions without departing from the conceptual ideas and spirit of the present invention derived from the contents and their equivalents as defined in the appended claims, but may be modified and partial deletion.
DESCRIPTION OF SYMBOLS
[0080]
　1 lighting device 2 irradiation device, 3 an optical element, 4 a laser light source, 5 a timing control unit, 6 scan unit, 6a optical scanning member, 7 a light source unit, 10 the illuminated area, 11, 12 rotation shaft, 13 reflection device, 14 diffusion region 15 element diffusion region, 16 the hologram recording medium, 17 a hologram region, 18 elementary hologram region, 19 partial regions, 20 illumination range, 21 object detecting unit, 22 an object

The scope of the claims
[Claim 1]
　A coherent light source emitting a plurality of coherent light,
　wherein the plurality of by diffusing coherent light, an optical element for illuminating a predetermined illumination range,
　incident timing to the optical element of the plurality of coherent light or the illumination range, and a timing controller for individually controlling the lighting timing of
　the optical element is provided corresponding to each of the plurality of coherent light has a plurality of diffusion regions corresponding coherent light enters ,
　each of the plurality of diffusion regions, by diffusion of the incident coherent light, is capable illuminating the illumination range,
　wherein each of the plurality of diffusion regions having a plurality of elements diffusion region,
　said plurality of elements each of the diffusion regions, by diffusion of the incident coherent light illuminates the partial area in the illumination range,
　said plurality of elements At least a portion of the partial area illuminated by the respective distributed areas, each different to that lighting device.
[Claim 2]
　Wherein the plurality of coherent light emitted by a coherent light source, the lighting device according to claim 1, emission wavelength region is different respectively.
[Claim 3]
　The lighting device according to claim 1, further comprising a scanning unit for scanning the plurality of coherent light emitted by the coherent light source on said optical element.
[Claim 4]
　The scanning unit, the lighting device according to claim 3 having an optical scanning member for periodically changing the traveling direction of the emitted plurality of coherent light at the coherent light source.
[Claim 5]
　The optical scanning member, the plurality of coherent light from the coherent light source, the cyclically scanned over the incident surface of the optical element,
　the timing controller, the scan of the plurality of coherent light by the optical scanning member in synchronism with the timing, lighting device according to claim 4 for individually controlling the illumination timing of the incident timing or the illumination range, to the optical element of the plurality of coherent light.
[Claim 6]
　The timing controller such that said illumination mode of the illumination range is changed periodically or temporarily, in synchronization with the scanning timing of the plurality of coherent light by the optical scanning element, the optical of the plurality of coherent light the lighting device according to the illumination timing of the incident timing or the illumination range, to the element to claim 4 for individually controlling.
[Claim 7]
　The timing controller, the so selected arbitrary regions in the illumination range and the other area in the illumination range is different illumination mode from each other, the incident timing of the said optical elements of said plurality of coherent light , or lighting device according to claim 1 for individually controlling the illumination timing of the illumination range.
[8.]
　The timing controller, the so selected arbitrary regions in the illumination range is illuminated in a color different from that of the other area in the illumination range, the incident timing of the said optical elements of said plurality of coherent light , or lighting device according to the illumination timing of the illumination range to claim 7 for controlling individually.
[Claim 9]
　The timing controller, as only selected arbitrary regions within the illumination range of the illumination range is not illuminated, the plurality of incident timing to the optical element of the coherent light or illumination timing of the illumination range, the lighting device according to claim 7 for controlling individually.
[Claim 10]
　Comprising an object detector for detecting an object existing within the illumination range,
　the timing control unit area of the detected object by the object detection unit and the other area in the illumination range together so that different illumination mode, the illumination device according to claim 1 for individually controlling the illumination timing of the incident timing or the illumination range, to the optical element of the plurality of coherent light.
[Claim 11]
　Comprising an object detector for detecting an object existing within the illumination range,
　the timing control unit, at least one of the illumination mode of the said object detected by the object detecting unit and its peripheral region the illumination as different from the illumination aspect other regions within illumination apparatus according to the illumination timing of the incident timing or the illumination range, to the optical element of the plurality of coherent light in claim 1 for controlling individually .
[Claim 12]
　The timing controller, the lighting device according to claim 1 for individually controlling the light emitting timing of the plurality of coherent light the coherent light source emits light.
[Claim 13]
　It said optical element is a holographic recording medium,
　wherein each of the plurality of elements diffusion region, the lighting device according to claim 1, wherein the element hologram area fringe pattern is formed which differ respectively.
[Claim 14]
　Wherein the optical element is a lens array unit having a plurality of lens arrays,
　each of said plurality of elements diffusion region, the lighting device according to claim 1 having the lens array.