BACKGROUND
[0001] The invention relates to lighting systems and more specifically a system for generating glare free light.
[0002] Generally, land vehicles are used in a wide range of environmental conditions. These conditions range from clear, lighted roadways, to foggy and low visibility conditions. Often, these vehicles travel great distances under adverse conditions. As is taught in the art, a headlight that is oriented to be effective under clear conditions may not be as effective under foggy conditions. Thus, many vehicles have two separate headlight systems, one for clear environmental conditions and one for unclear conditions.
[0003] Headlights are often designed to generate light with a desired range and intensity. However, high density headlights may inconvenience vehicular traffic travelling in the opposite direction. For example, headlights used in automobiles while producing the required intensity and range, produce large amounts of glare. Such glare is undesirable because it reduces road visibility for oncoming traffic.
[0004] Most headlamps that are commercially available uses high intensity source like halogen lamp to generate light and a combination of mirror and lens assembly to create a focused beam. High intensity light sources are used so that a illumination can achieved for a longer range.
[0005] One problem with using high intensity light sources is the presence of glare. In onrder to reduce glare, it is often required to reduce the intensity of the high intenisty light source win the headlamp. However, reducing the intenisty would lead to reducing the range of the headlamp.
[0006] Therefore, there is a need to design a glare free light generating system that provides a desired range while reducing glare.
BRIEF DESCRIPTION
[0007] Briefly, according to one embodiment of the invention, a glare-free light generating device. The device comprises a laser system configured to generated red, green and blue (RGB) laser rays, a rotating polygon mirror configured to reflect the RGB laser rays, wherein the reflected RGB rays form a multi-colored line of light, wherein a portion of the multi-colored line of light is white light and an oscillating mirror configured to receive only the white light and generate a glare free light beam.
DRAWINGS
[0008] These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
[0009] FIG. 1 is a diagrammatic view of an automobile implemented according to one aspect of the invention;
[0010] FIG. 2 is a top view of an automobile implemented according to one aspect of the invention; and
[0011] FIG. 3 is a diagrammatic view of a glare free light generative device implemented according to one aspect of the invention.
[0012] DETAILED DESCRIPTION
[0013] As discussed in detail below, embodiments of the present technique function to provide a glare free light generating device. The glare free light generating device may be used in several industries. For example, such devices may be used as the headlights of an automobile. The following description refers to a glare free light generating device that can be implemented in an automobile. However it should be understood that the techniques described below can be implemented in any system or device that requires the generation of a glare free light beam.
[0014] References in the specification to “one embodiment”, “an embodiment”, “an exemplary embodiment”, indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0015] Turning now to the drawings, and referring first to FIG. 1 is a diagrammatic view of an automobile implemented according to one embodiment of the invention. Automobile 10 includes two headlights 12 configured to generate glare free light. The headlights are electrically operated, and are positioned on each side of the front of a vehicle. The glare free light generated by headlights 12 assists easy navigation on road 14 when the automobile is operated under dimly lit conditions.
[0016] In one embodiment, an angle of the glare free light 12 can be adjusted by a user driving the automobile 10. In specific embodiments, the length of the glare free light 12 may also be adjusted by the user.
[0017] FIG. 2 is a top view of an automobile 10 comprising a glare free headlight 12. The headlights 12 are arranged such that the central direction of the headlight 12 corresponds to a main forward driving direction 16 of the automobile 10. When the headlights are turned on, a glare free light beam 18 is generated. The glare free light beam 18 is directed towards the road 14 and any oncoming traffic. The manner in which headlights 10 generate the glare free light beam is described in further detail below.
[0018] FIG. 3 is a block diagram illustrating the parts of a headlight implemented according to one embodiment of the invention. The headlight 20 is implemented to generate a glare free light beam and includes a laser source 22, a rotating polygon mirror 24 and an oscillating mirror 28. Each block is described in further detail below.
[0019] Laser source 22 is configured to generate red, green and blue laser light. The red light 32, blue light 34 and green light 36 together form a white laser beam. The white light beam is directed towards rotating polygon mirror 24. In one embodiment, the white light beam is directed to the polygon mirror 24 at an angle.
[0020] Polygon rotating mirror 24 is configured to receive the white light beam. In one embodiment, the polygon mirror 24 comprises at least 120 sides. In one embodiment, the polygon mirror 24 is coupled to a motor 26. The rotating motion of the polygon mirror 24 is obtained by enabling the motor 26. The polygon rotating mirror 24 may have upto 90 reflecting surfaces. In one embodiment, the polygon rotating mirror 24 includes 30 to 90 reflecting surfaces.
[0021] Due to the rotating motion of the mirror 24, an angle of incidence change and thus the angle of reflection also changes. As a result the white light beam moves from a first point to a second point. This process continues as long as the polygon mirror 24 keeps on rotating. The scanning angle or length depends on the number of facet or the number of sides of the polygon and the screen distance. The scanning speed depends upon the rotational velocity of the polygon mirror 24.
[0022] Further, when the red, green and blue laser lights are reflected across a face of the rotating polygon mirror 24 the light is oriented in such a way that the individual scanned lines overlap each other forming a multicolored line of light 38. In one embodiment, the multicolored line of light includes a monochromatic color, dichromatic color and a central zone of white light. The white light is directed towards oscillating mirror 28. In one embodiment, the white light is obtained by blocking the non-white components using an opaque material.
[0023] The oscillating mirror 28 is configured to reflect the multicolored line of light 38 generated by the rotating polygon mirror 24 and to form a glare free light beam 40. In one embodiment, a magnet assembly 30 is coupled to the oscillating mirror 28 to obtain an oscillating motion. In one embodiment, the magnet assembly 30 includes an arrangement of a permanent magnet and an electromagnet.
[0024] While only certain features of the invention have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.

CLAIMS:
1. A glare-free light generating device, the device comprising:
a laser system configured to generated red, green and blue (RGB) laser rays;
a rotating polygon mirror configured to reflect the RGB laser rays, wherein the reflected RGB rays form a multi-colored line of light, wherein a portion of the multi-colored line of light is white light; and
an oscillating mirror configured to receive only the white light and generate a glare free light beam.

2. The glare free light generating device of claim 1, wherein the multi-colored line of light is perpendicular to the glare free light beam.

3. The glare free light generating device of claim 1, wherein the oscillating mirror is coupled to a rotor of a DC motor, wherein the DC motor is configured to oscillate the mirror at a desired frequency.

4. The glare free light generating device of claim 3, wherein the glare free light beam is generated due to an oscillating motion of the oscillating mirror.

5. The glare free light generating device of claim 1, wherein the rotating polygon mirror is coated with a non-reflecting material to block non-white portions of the line of light.

6. The glare free light generating device of claim 1, wherein the rotating polygon mirror comprises about 30 to 90 reflecting faces.

7. The glare free light generating device of claim 1, further comprising a beam controlling system configured to direct the glare free light beam in a desired direction.

8. The glare free light generating device of claim 1, wherein a dimension of the glare free beam is based on a rotating frequency of the polygon mirror and an oscillating frequency of the oscillating mirror.

9. The glare free light generating device of claim 8, wherein rotating frequency and oscillating frequency is programmable.

10. A system for generating glare free light substantially as herein described and illustrated in the figures of the accompanying drawings.