DESC:FIELD OF THE INVENTION

The present application relates to an optical system comprising a single moulded optical compound which is used for beam shaping, and providing a beam of high photometric efficiency.
BACKGROUND OF THE INVENTION

An optical system may comprise one or more components which are used for reflection or refraction of the light to produce a desired effect. This desired effect is in form of a light beam that illuminates road surface, wherein such an optical system and is primarily been employed in an automobile or vehicle. Such light beam provides visibility for object(s) that are lying on the road. This causes better visibility for vehicle driver in order to maintain vehicle speed in accordance with road surface and other such conditions.
Conventional optical systems are arrangement of separate optical modules for producing diverging beams. Due to separate arrangement of the optical modules in the optical system, the optical system is usually bulky. Due to this, there is overall increase in weight of an automobile/vehicle which is not desirable considering the present scenario. In addition, manufacturing of such optical systems with plurality of optical modules leads to an increase in the manufacturing cost.
Another problem associated with the manufacturing of the conventional optical system is the alignment of the optical modules within the optical systems. For example, the alignment of the optical modules in the conventional optical system requires human intervention and also leaves the scope of error leading to manufacturing defects in the final product. This causes in ability and inefficient working of optical system since optical modules are arranged in non-synchronous manner. Additionally, the resultant output light beam from a faulty optical system causes heterogeneous illumination of road. Thus, there is hampering of with the visibility of vehicle driver and may cause road accident or other such disaster. Consequently, the manufacturing of the conventional optical systems is are time consuming, complex and as well as costly in nature.
Following are convention prior art(s) that discloses optical system that are employed in an automobile:
US20070263402A1 discloses and teaches a headlamp optical module for a motor vehicle comprising, disposed along an optical axis: an elliptical-type reflector with a light source placed in the vicinity of a first focal point of the reflector. A converging lens placed in front of the reflector and admitting a focal point located in the vicinity of the second focal point of the reflector; and a light recovery means suitable for collecting a portion of the flux from the source and for sending it forward. An ellipsoid-type reflector is provided at the front, in the upper portion of the module, this reflector focusing a portion of the rays issuing from the source in the vicinity of a second focal point located at the front, lower than the focal point of the lens, and the light recovery means has an input face, in proximity to which is located the second focal point of the ellipsoid-type reflector.
US6556352B2 discloses and teaches an apparatus of beam shaping for laser diode array, comprising a laser diode array, a beam offsetting means, a beam redirection means, an optics disposed between said beam offsetting means and said beam redirection means, wherein said beam offsetting means collimates the beams from the emitters in the fast axis and offsets said beams from each other along the fast axis by offsetting and the outgoing angles of the beams, and said optics collimates the beams from said beam offsetting means in the slow axis and allows each of the beams to strike upon said beam redirection means so the beams travel one or a plurality of predetermined directions after the beam redirection means.
US7722233B2 teaches and discloses an optical module for a motor vehicle lighting device, capable of emitting at least one type of light beam having a cut-off and comprising: a light source disposed in a reflector; a dioptric element, in particular a convergent lens, disposed in front of the reflector; a shield disposed between said light source and said dioptric element and having at least one optically active position where it intercepts some of the light rays emitted by the source, the optically active edge of the shield being suitable for forming a cut-off in the beam emitted by the module.
Further, US’233 discloses an additional optical element disposed between the light source and the shield, said additional optical element being in the vicinity of the optically active edge of the shield and having reflective surface capable of redirecting, above the optically active edge of the shield, some of light rays that normally would have been blocked by the shield are reflected by the additional optical element above said optically active edge of the shield toward said dioptric element and do not contact the shield when said light rays are emitted by the light source toward said shield.
US10151437B2 teaches and discloses a lighting system for a motor vehicle comprising: a primary optical device for emitting a light beam exhibiting a cutoff profile, a primary optical emission device including light source and one single-piece primary optical member, the primary optical member includes an input surface configured to receive a light beam emitted by said at least one light source, a ray interception surface configured to form said cutoff profile in said light beam received and an output surface through which each light beam emitted by the light source travels.
US’437 also discloses a projection device that is arranged from the output surface of primary optical emission device. The projection device includes an input surface arranged facing primary optical emission device, and through which are introduced rays of said light beam derived as output from the output surface of primary optical emission device, and a single continuous output surface through which said light beam is projected, wherein said projection device consists of a projection lens.
Further, in US’437, the input surface of said projection lens is discontinuous and is divided into several portions linked to one another, each portion being adapted to and situated downstream of primary optical emission device.
However, none of the existing prior art(s) disclose beam designing capability that can be performed adequately, suitably, and efficiently by a single moulded optical system.
In view of this, present invention has been devised to address and tackle technical issues related to convention optical system.
This, primary objective of present invention is to devise an optical system with a single moulded optical compound to produce beam shaping beam-shaping effects efficiently.
SUMMARY OF THE INVENTION
Accordingly, it is the principal object of the present invention to solve the aforesaid problems existing in the state of- art for economic and efficient manufacturing of the optical systems with minimal manufacturing defects.
It is another object of the present invention to provide an improved optical system with a single moulded optical compound to reduce the cost of manufacturing of the optical system by eliminating the requirement of human resources for alignment of individual optical modules in the optical system.
Another object of this invention is to provide a precise arrangement of these plurality of elliptical surfaces in a single moulded optical compound, in a manner such that projected beam has a high photometric efficiency and an additional optical property. Further, the projected light beam is clear, adequate, suitable, homogeneous, and efficient to illuminate road surface, such that visibility for vehicle drive does not hamper.
Yet another object of this invention is to provide an improved optical system having a single moulded optical compound which does not require surface treatment such as metallization with respect to plurality of elliptical surfaces. Thus, improved optical system of present invention is cost-effective, efficient and lightweight in nature. hence projecting light beam in a cost-effective manner.
The present invention thus relates to an improved optical system to achieve the above se objectives. The improved optical system pertinent to this invention comprises of a light source and a single moulded optical compound placed along an optical axis of the optical system. Further, the single moulded optical compound comprises an input optical surface, at least one elliptical surface, at least one focal plane and at least one condenser lens.
The input optical surface is designed to receive light rays from the light source. In one embodiment, the input optical surface is elliptical in surface. These light rays of the input optical surface are then refracted onto the surface of a first elliptical surface within the optical system. The light rays from the first elliptical surface are then reflected by the phenomenon of total internal reflection to the focal plane of the optical system. Further, the focal plane of the optical system receives this reflected light rays by way of total internal reflection which eliminates the need of metallization of the surface of the optical system. In one embodiment, the focal plane is at a focal angle with respect to the optical axis of the optical system to achieve a desired beam shape. In another embodiment, the focal angle is 90 degrees (perpendicular) to the optical axis of the optical system. The light rays from the focal plane are incident onto the condenser lens which is further directed in a parallel direction with that of the optical axis to an infinity from the condenser lens in order to project beam from the optical system.
Advantageously, the optical system ensures that projected beam from the optical system is clear, homogeneous, well-defined and can be obtained at an infinity with uniform scattering of light beam without distortion. This advantage leads to the high photometric efficiency of the optical system. Another advantage of the optical system is that it saves the cost of implementing a separate shielding mechanism.
The invention thus makes it possible to use optical system for desired beam shaping by modifying the shape of the input optical surface and the first elliptical surface of the optical system so as to regulate the shape of the image of the focal plane. Further, by changing the dimensions of the optical compound at the focal plane (for example, by way of a cut or section in the compound), the shape of the beam can be modified, without any need of shielding within the optical compound.
The summary is provided to introduce the system as a representative concept in a simplified form that are further described below in the detailed description. This summary is not intended to limit the key essential features of the present invention nor its scope and application.
Other advantages and details about the system and the method will become more apparent to a person skilled in the art from the below detailed description of the invention when read in conjugation with the drawings.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

FIGURE 1a illustrates top view of an optical system used for projecting low beam.
FIGURE 1b illustrates bottom view of an optical system used for projecting low beam.
FIGURE 1c illustrates side view of an optical system configured with a conical cut to produce low beam.
FIGURE 2a illustrates top view of an optical system used for projecting high beam.
FIGURE 2b illustrates side view of an optical system used for projecting high beam.
FIGURE 3 illustrates an isophotal curve graph during low beam projection from an optical system.
FIGURE 4 illustrates an isophotal curve graph during high beam projection from an optical system.
The present invention can be understood with reference to the detailed figures and description set forth herein. Various embodiments are discussed below with reference to the figures. However, those skilled in the art will readily appreciate that the detailed descriptions given herein with respect to the figures are simply for explanation of the invention as the methods and systems may extend beyond the described embodiments. For example, the teachings presented and the needs of a particular application yield multiple alternative and suitable approaches to implement the functionality of any detail described herein. Therefore, any approach extends beyond the particular implementation choices in the following embodiments described and shown.
References to “one embodiment,” “at least one embodiment,” “an embodiment,” “one example,” “an example,” “for example,” and so on indicate that the embodiment(s) or example(s) may include a particular feature, structure, circuit, architecture, characteristic, property, element, or limitation but that not every embodiment or example necessarily includes that particular feature, circuit, architecture, structure, characteristic, property, element, or limitation. Further, repeated use of the phrase “in an embodiment” does not necessarily refer to the same embodiment.

TERMS:
Total Internal Reflection: The complete reflection of a light ray at the boundary of two media when the beam is in the medium with a higher refractive index is known as total internal reflection.
DESCRIPTION
Turning now to drawings, an optical system (100, 200) in accordance with the present invention is described in reference with figures 1 to 4 of the complete specification.
With reference to FIGURE 1a-1b-1c, the improved optical system (100) for projecting low beam is illustrated according to an embodiment of the present invention. In particular, FIGURE 1a schematically illustrates an enlarged top view of the optical system (100) as a whole.; FIGURE 1b schematically illustrates an enlarged bottom view of the optical system (100) as a whole. FIGURE 1c illustrates an enlarged side view of the optical system (100) as a whole.
In particular, in an exemplary embodiment as shown by FIGURE 1a-1b-1c, the improved optical system 100 comprises of a light source (101) and a single moulded optical compound (106) that is placed along an optical axis (116) of the optical system (100). Further, the single moulded optical compound (106) of an optical system comprises of an input optical surface (102), a first elliptical surface (104), a focal plane (110), and a condenser lens (108). The optical axis (116) is a horizontal axis which passes through the mid-point of the light source (101), the input optical surface (102), the first elliptical surface (104), the focal plane (110), and the condenser lens (108).
For all embodiments of the present invention, the light source (101) is employed in the optical system (100) as a light emitting medium and is placed externally to the single moulded optical compound (106). The light source used in an optical system is not to be limited to any one particular kind and thus it can may be of any shape and type in accordance with the convenient of user.
The input optical surface (102) is adjacent to the light source (101) so as to directly receive light rays from it. These light rays which are refracted in the input optical surface (102) to reach the first elliptical surface (104). The light rays from the input optical surface (102) strike onto the surface of the first elliptical surface (104) in order to get reflected internally in the optical system (100). These reflected light rays travels towards to the focal plane (110). In an alternate embodiment, the number of first elliptical surfaces in the optical system (100) may vary in accordance with the requirements of beam shaping so as to form the multiple focal plane (110). The reflected light inside the first elliptical surface (104) follows the principle of total internal reflection eliminating the need of metallization of the internal surfaces of optical systems (100) and therefore, reducing the manufacturing cost of such improved optical systems (100). Further, the input optical surface (102) and first elliptical surface (104) can be oriented at a given surface angle so as to form the focal plane (110) in a predetermined position in accordance with the requirements of the beam shaping. The purpose of the focal plane (110) is to provide a plane for formation of desired beam image which will be further directed at an infinity through a condenser lens (108).
Further, the focal plane (110) is formed at a pre-determined distance from the input optical surface (102), the first elliptical surface (104), and Additionally, the focal plane (110) is oriented at a focal angle with respect to the optical axis (116) of the optical system (100). In one embodiment, the orientation of focal angle of the focal plane (110) is at 90 degrees to the optical axis of the optical system (100). In other embodiments, the focal angle of the focal plane (110) varies in accordance with the requirements of the beam shaping. Similarly, the distance of formation of the focal plane (110) can depend on the surface angle between the input optical surface (102) and the first elliptical surface (104) to generate the desired beam shape.
These light rays from the focal plane (110) are incident onto the condenser lens (108). The purpose of condenser lens (108) is to direct light rays which are falling on it from the focal plane (110) and is projected at an infinity in parallel direction with that of the optical axis (116) of the optical system (100). Further, the light rays s are directed in a desired direction with respect to the optical axis (116) by orienting placing the condenser lens (108) at a pre-determined condenser angle with respect to the optical axis (116). In one embodiment, the condenser lens is oriented at 90 degrees from the optical axis (116). In another embodiment, Tthe condenser lens (108) is designed in a manner to provide an additional optical property to the beam such as texture, and thus, provides clarity to the beam. This also provides an added advantage of an to increase in photometric efficiency of the projected beam. The condenser lens (108) is placed at a predetermined condenser distance (112) from the focal plane (110). The predetermined condenser distance (112) is calculated by a person skilled in the art in accordance with the requirement of degree of spread and photometry efficiency as required in specific situations. For example, it is desirable to have lower spread for traffic lights while wider spread for projection lights.
According in an exemplary embodiment of this invention, the shape of the optical compound (10614) as illustrated in FIG 1a-1b is structured narrowly in a truncated conical shape (114) so as to project low beam from the optical system (100). The shape of the optical compound (10614) is calculated on the basis of given beam shape by modifying the input optical surface (102), the first elliptical surface (104), and the focal plane (110) as illustrated above. The reflected light rays from the first elliptical surface (104) are converged and thus falls onto the condenser lens (108). Figure 1c explains an angular cut (118) in the single moulded optical compound (1016) for low beam. Due to the presence of the angular cut (118), the incident light rays passing from the focal plane (110) are either absorbed or reflected back to the focal plane (110) itself. This eliminates the requirement of a separate shield for the low beam and therefore lowers the manufacturing cost of the optical system (100). Since the incident rays falling on the condenser lens (108) are just a fraction of incident light rays from the focal plane (110), the configuration of the single moulded optical compound (106) is able to project ting low beam.
In one embodiment, the surface of the angular cut (118) is treated in such a way that the all the light rays s that are striking at the angular surface (118) are reflected to the focal plane (110) at a predetermined angle s so as to be incident onto the condenser lens (108). as part of the low beam. In this process, there is partial absorption of light rays at a focal plane (110), wherein this leads to a formation of low beam projection.
A person skilled in the art will be able to implement all the embodiments of FIG. 1a-1b-1c (Illustrates the optical system used to produce low beam) for high beam as well. Therefore, although FIG. 2a-2b (high beam) are illustrated with only a few examples, it shall be equally applicable to incorporate the embodiments mentioned with respect to FIG. 1a-1b-1c. In FIGURE 2a-2b illustrates another exemplary embodiment of the subject matter of the present invention, which is used for projecting high beam from the optical system (200). The optical system (200) comprises the light source (201) and the single moulded optical compound (206). Further, the single moulded optical compound (206) of the optical system (200) comprises the input optical surface (202), the first elliptical surface (204), the focal plane (210), and the condenser lens (208). The optical axis (216) is a horizontal axis which passes through the mid-point of the light source (201), the input optical surface (202), the first elliptical surface (204), the focal plane (210), and the condenser lens (208). The shape of the single moulded optical compound (20614) of this exemplary embodiment is further divided into a first part (214a) and a second part (214b). The first part (214a) is structured narrowly while the second part (214b) of the optical compound (206) is structured broadly in the optical system (200) for projection of a high beam.
The input optical surface (202) is part of the single moulded optical compound (204) and is adjacent to the light source (201) so as to directly receive light rays from it. The light which enters inside the input optical surface (202) from the light source (201) is refracted in the input optical surface (202) at an angle to strike at the first elliptical surface (204). The first elliptical surface (204) is aligned adjacent to the input optical surface (202) at a surface angle, such that the refracted light rays from the input optical surface (202) strike onto the surface of the first elliptical surface (204) and gets reflected towards the focal plane (210) of the optical system (200). The reflection on the first elliptical surface (204) occurs by total internal reflection and the light rays form the beam shape at the focal plane (210). The focal plane (210) is at the focal angle with respect to the optical axis (216) to achieve the desired beam shape. In one embodiment, the focal plane (210) is vertical plane with respect to the optical axis (216) of the optical system (200). In an alternate embodiment, the number of elliptical surfaces in the optical system (200) may vary in accordance with the requirements of beam shaping. The orientation of the input optical surface (202) and the first elliptical surface (204) determines a location of for the focal plane (210),
Further, the reflected light rays from the first elliptical surface are reflected towards the focal plane (210). The focal plane (210) is at the focal angle with respect to the optical axis (216) to achieve the desired beam shape. The focal plane (210) is formed at a pre-determined distance from the input optical surface (202) and the first elliptical surface (204). The focal plane (210) is a vertical plane whose focal angle is calculated with respect to the optical axis (216). In one embodiment, the focal angle of the focal plane (210) is perpendicular to the optical axis of the optical system (200). Alternatively, the focal angle of the focal plane (210) can vary in accordance with the requirements of the beam shaping. The distance of formation of the focal plane (210) depends on surface angle of orientation of the first elliptical surface (204) and the input optical surface and the second elliptical surface (2024).
Further, these light rays from the focal plane (210) are incident onto the condenser lens (208). The purpose of the condenser lens (208) is to direct light rays which are falling on it from the focal plane (210) and is projected uniformly at an infinity in parallel direction with that of the optical axis (216) of the optical system (200). Further, the condenser lens (208) provides additional optical property to the beam such as texture and clarity to the beam to increase photometric efficiency of the projected beam. The condenser lens is placed at a predetermined condenser distance (218) from the focal plane (210) and this predetermined condenser distance (218) that is calculated on the basis of given beam shape. The purpose of the condenser lens (208) is to project the incident light rays from the focal plane (210) and thus ensures that projected light beam from the optical system (200) is directed uniformly at the infinity in desired directions with respect to the optical axis (216).
The geometry and dimension of the optical compound (20614) is calculated on the basis of given beam shape by modifying the input optical surface (202), the first elliptical surface (204) and consequently, the focal plane (210). The reflected light rays from the first elliptical surface (204) are converged in the narrow part (214a) of the optical compound (214). The narrow part (214a) of the focal point of the optical compound (20614) is extended up to the point of formation of the focal plane (210). The broad part (214b) of the optical compound (20614) is structured after the focal plane (210) up to the condenser lens (208). Since there is no angular cut in the optical system (200), thus because of which light rays from the focal plane (210) are incident onto the condenser lens (208) without getting lost. Further, the external edge of the optical system (200) is not undergoing any surface treatment for example metallization due to which beam projection is done in a cost-effective manner from the optical system (200).
The optical system as illustrated is primarily employed in an automobile for projecting low beam and/or high beam. Thus, providing adequate illumination of road surface and thereby, suitable visibility for vehicle driver to clearly see object(s) lying on road. Additionally, present invention may be employed for system used for projecting light beam in a pre-determined manner.
FIGURE 3 and 4 illustrates isophotal curve for low beam and high beam projection from an optical system (100; 200) respectively. The formation of raised shoulder (304) is there in the isophotal curve (302) during projection of low beam from the optical system (100). This raised shoulder is absent in the isophotal curve (402) in a horizontal line (404) during high beam projection from the optical system (200). This is due to the reason that low beam projection in the optical system (100) is formed due to the presence of the angular cut (118 as shown in FIG. 1c). The isophotal curve (302) in low beam is below the horizontal line (306) while the isophotal curve (402) is distributed uniformly around a horizontal line (404) in the case of high beam projection from the optical system (200).
Examples
The embodiments of this invention are further explained by way of following examples. However, the examples do not limit the scope of the invention claimed in any manner. The invention can be implemented through other embodiments having different dimensions of the elements based on the requirements of the optical system.
Example 1: In an exemplary embodiment with respect to optical system used for projecting low beam following dimensions can be considered:
Length of a single moulded optical compound: Single moulded optical compound length is in range of 80-85mm (millimetres). In one embodiment, length can be taken as 84.12mm for single moulded optical compound (106).
Length of the elliptical surface functionality plane: Elliptical surface functionality plane length is in range of 30-35mm. In one embodiment, length can be taken 32.81mm for elliptical surface (104).32.81 m
Length of angular cut on the focal point of the single moulded optical compound (excluding dimension of condenser lens): Angular cut length is in range of 20-25 millimetre. Alternatively, in one embodiment, length of angular cut (118) can be considered as 21.86mm
Diameter of the condenser lens: Condenser lens is of diameter in range of 24-28 millimetre. Preferably, length of condenser lens (108, 208) is to be calculated as 25.38mm
The length of the single moulded optical compound (106) in an optical system used for projecting low beam is measured to be 84.12m.
Example 2: In an exemplary embodiment with respect to the optical system used for projecting high beam following dimensions can be considered:
Length of the single moulded optical compound: Single moulded optical compound length is in range of 49-54 millimetres. Preferably, in one embodiment, the length of single moulded compound (206) can be calculated as 51mm
Diameter of the condenser lens: Condenser lens diameter is in range of 20-25 millimetres. Preferably, diameter of condenser lens (108) is to be considered as 21.15mm
Distance from the first elliptical surface till the focal plane: First elliptical surface diameter is in range of 22-25 millimetres. Preferably, distance between first elliptical surface and focal plane is calculated as 23mm.
Advantageously, this invention provides a precise arrangement of different components of the single moulded optical compound in such a manner that the optical system provides high and better photometric efficiency.
The components of the single moulded optical compound are arranged on various factors in order to avoid any surface treatment due to which projection of beam shaping is done in a cost-effective manner through this optical system. The arrangement of components in the single moulded optical compound further ensures that beam shaping is achieved through this optical system.
A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention. The present disclosure may be realized in a centralized fashion, in at least one processing system, or in a distributed fashion, where different elements may be spread across several interconnected systems or circuits connected to the optical system.
A person with ordinary skills in the art will appreciate that the systems, elements, circuit elements, modules, and sub-modules have been illustrated and explained to serve as examples and should not be considered limiting in any manner. It will be further appreciated that the variants of the above disclosed circuit elements, modules, and other features and functions, or alternatives thereof, may be combined to create other different systems or applications.
While the present disclosure has been described with reference to certain embodiments and exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from its scope.
,CLAIMS:We Claim:
1. An improved optical system (100, 200), comprising:
a light source (101, 201); and
a single moulded optical compound (106, 206), wherein the single moulded optical compound (106, 206) is designed to internally reflect light rays from the light source (101, 201) to shape the beam obtained by the optical system (100, 200), and wherein the light source (101, 201) and the single moulded optical compound (106, 206) is aligned to an optical axis (116, 216).

2. The improved optical system (100, 200) as claimed in claim 1, wherein the single moulded optical compound (106, 206) comprises;

an input optical surface (102, 202) aligned with the light source (101, 201) such that light rays from the light source (101, 201) falls on the first elliptical surface (104, 204);
a first elliptical surface (104, 2014) adjoining the input optical surface (102, 202) such that the light rays falling on the input optical surface (102, 202) are reflected to the first elliptical surface (104, 204);
a focal plane (110, 210) aligned at a focal angle with respect to an optical axis (116, 216), which receives the light from the first elliptical surface (104, 204); and
a condenser lens (108, 208) placed at a pre-determined condenser distance (112, 218) from the focal plane (110, 210), wherein the pre-determined condenser distance (112, 218) of condenser lens is calculated based on the given beam shape.

3. The improved optical system (100, 200) as claimed in claim 2, wherein the optical axis (116, 216) is a horizontal axis which is passing through the mid-point of the light source (101, 201), the input optical surface (102, 202), the focal plane (110, 210) and the condenser lens (108, 208).

4. The improved optical system (100, 200) as claimed in claim 2, wherein configuration of the single moulded optical compound (106, 206) depends on the beam shape.
4.5. The improved optical system (100, 200) as claimed in claim 2, wherein external surface of the single moulded optical compound (106, 206) is a non-metallized surface.

6. The improved optical system (100, 200) as claimed in claim 23, wherein the input optical surface (102, 202) and the first elliptical surface (104, 204) is are oriented at a surface angle with reference to optical axis (106, 206).

7. The improved optical system (100, 200) as claimed in claim 2, wherein the input optical surface (1001, 201) and the first elliptical surface (104, 204) are aligned with each other such that light rays travelling inside the single moulded optical compound (106, 206) follows a principle of total internal reflection.

8. The improved optical system (100, 200) as claimed in claim 2, wherein the input optical surface (102, 202) and the first elliptical surface (104, 204) of the single moulded optical compound (106, 206) are aligned such that beam shape is obtained at an infinity.

5. The improved optical system (100, 200) as claimed in claim 2, wherein the input optical surface (102, 202) and the second elliptical surface (104, 204) of the single moulded optical compound (106, 206) are aligned such that beam shape is obtained at a predefined distance.

6. The improved optical system (100, 200) as claimed in claim 2, wherein the reflected light rays from the first elliptical surface (104, 204) is converging uniformly up to the focal plane (110, 210) of the single moulded optical compound (106, 206).

7.9. The improved optical system (100, 200) as claimed in claim 21, wherein the focal plane (110, 210) is formed at a distance from the input optical surface (102, 202), and the first elliptical surface (104, 204).

8.10. The imporved optical system (100, 200) as claimed in claim 25,; wherein the focal angle of focal plane (110, 210) is at an angle of 90 degree with respect to the optical axis (116, 216).

9. The improved optical system (100, 200) as claimed in claim 6, wherein the optical axis (116, 216) is a horizontal axis which is passing through the mid-point of the light source (101, 201), the input optical surface (102, 202), the focal plane (110, 210) and the condenser lens (108, 208).

The improved optical system (100, 200) as claimed in claim 7, wherein the input optical surface (1001, 201) and the first elliptical surface (104, 204) are aligned with each other such that light rays travelling inside the single moulded optical compound (106, 206) follows principle of total internal reflection.

10. The improved optical system (100, 200) as claimed in claim 8, wherein external surface of the single moulded optical compound (106, 206) is a non-metallized surface.

11. The improved optical system (100, 200) as claimed in claim 9, wherein the reflected light rays from the first elliptical surface (104, 204) is converging uniformly up to the focal plane (110, 210) of the single moulded optical compound (106, 206).

12. The improved optical system (100, 200) as claimed in claim 10, wherein light rays travelling beyond the focal plane (110, 210) and towards the condenser lens (108, 208) is diverging uniformly in the single moulded optical compound (106, 206).

13.11. The improved optical system as claimed in claim 212, wherein the condenser lens predetermined condenser distance (112, 218) is a distance between the focal plane (110, 218) and the condenser lens (108, 208).

14.12. The improved optical system (100, 200) as claimed in claim 213, wherein the condenser lens (108, 208) is oriented at a condenser angle with respect to the optical axis (116, 216).

15. The improved optical system (100, 200) as claimed in claim 14, wherein the input optical surface (102, 202) and the first elliptical surface (104, 204) of the single moulded optical compound (106, 206) are aligned such that beam shape is obtained at an infinity.

16. The improved optical system (100, 200) as claimed in claim 15, wherein the input optical surface (102, 202) and the second elliptical surface (104, 204) of the single moulded optical compound (106, 206) are aligned such that beam shape is obtained at a predefined distance.

17.13. The improved optical system (100, 200) as claimed in claim 216, wherein the condenser lens (108, 208) imparts additional optical property such as texture, additional spread etc. to the light ray which is emitted from the condenser lens (108, 208) as beam.

18.14. The improved optical system (100, 200) as claimed in claim 217, wherein the beam from the condenser lens (108, 208) is travelling uniformly in a parallel direction with that of the optical axis (116, 216).

Dated this August 24, 2022.

Archana Singh, Vivek Ranjan, Shreya Chaudhary
(IN/PA-1936, IN/PA-3170, IN/PA-5145)
Of Singh and Singh Law Firm LLP
Patent Agents for the Applicant