Optical system for modifying light distribution
By combining a first optical element made of transparent material and a second optical element made of planar photoforming microstructure, the glare and uniformity problems of existing optical systems during high-brightness light output are solved, achieving efficient beam control and aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LEDIL
- Filing Date
- 2024-09-06
- Publication Date
- 2026-04-17
AI Technical Summary
Existing optical systems are inadequate in controlling glare and maintaining uniform light output, especially when high brightness light output is required. The physical size of microprisms and diffusers is limited, leading to problems of glare and reduced efficiency.
The method employs a combination of a first optical element made of transparent material and a second optical element with a planar photoforming microstructure. The light emitting surface of the first optical element is matched with the area of the second optical element to reduce beam divergence and to process the beam through the photoforming microstructure to achieve uniform light distribution.
It achieves the goal of maintaining uniform high-brightness light output while reducing glare, improving the aesthetics of lighting equipment and beam control precision, and reducing stray light generation.
Smart Images
Figure CN121889618A_ABST
Abstract
Description
Technical Field
[0001] This disclosure generally relates to lighting engineering. More specifically, this disclosure relates to an optical system for modifying the distribution of light produced by one or more light sources, each of which can be, for example, but is not necessarily, a light-emitting diode (LED). Furthermore, this disclosure relates to luminaires comprising one or more light sources and an optical system. Background Technology
[0002] In some applications, the distribution of light produced by one or more light sources can be important or even crucial. Each light source may include, for example, but not necessarily, a light-emitting diode (LED), an incandescent lamp, or a gas discharge lamp. The distribution of light produced by the light source can be modified using optical devices such as lenses, reflectors, and combined lens-reflector devices, which include sections that act as lenses and sections that act as reflectors.
[0003] For lighting purposes, microprisms and diffusers are well-accepted in the market. However, microprisms and diffusers have limitations related to glare and high brightness, especially when a desired light output is required but the physical dimensions of the microprism or diffuser surface are limited. When a large amount of light is emitted from a small surface, the surface brightness increases. When the brightness is too high, it causes glare. Glare can be controlled by reducing the beam angle, so that the microprism or diffuser surface does not emit too much light into a potential glare angle range starting from ±30 degrees to 60 degrees relative to the geometric normal of the microprism or diffuser surface.
[0004] Typical diffusers emit light according to Lambert's cosine law, ensuring that the diffuser surface has essentially the same brightness to the observer, regardless of the viewing angle. However, this means that too much light is emitted into the aforementioned potential glare angle range. For example, commonly used anti-glare microprism patterns can limit light emission to the potential glare angle range. However, microprism sheets with anti-glare prism arrays require diffuser elements to impart a sufficiently uniform surface aesthetic to the lighting device. However, the required diffuser elements reduce efficiency and beam control accuracy. Summary of the Invention
[0005] The following is a simplified summary of the invention to provide a basic understanding of some aspects of embodiments of the invention. This summary is not a broad overview of the invention. It is neither intended to identify key or essential elements of the invention nor to depict the scope of the invention. The following summary presents only some concepts of the invention in a simplified form as a prelude to a more detailed description of illustrative embodiments.
[0006] In this document, the word “geometry” as a prefix means a geometric concept that is not necessarily part of any physical object. A geometric concept can be, for example, a geometric point, a geometric line, a geometric surface, a geometric plane, a non-planar geometric surface, a geometric space, or any other geometric entity that is zero-dimensional, one-dimensional, two-dimensional, or three-dimensional.
[0007] According to the present invention, a novel optical system for modifying light distribution is provided.
[0008] The optical system according to the present invention includes: - A first optical element, made of a transparent material and having one or more optical segments, each optical segment having a light-incident surface for receiving diverging light from a light source and a light-exit surface for allowing light to exit the first optical element, each optical segment being shaped to produce an optical effect such that the beam exiting the optical segment diverges less than the beam of diverging light entering the optical segment, and - A second optical element, which is planar and has light-forming microstructures, such as a pincushion array, and is configured to receive light exiting from the first optical element.
[0009] The total area of one or more light-emitting surfaces of the first optical element is configured to match the area of the second optical element, such that the area of the projection of one or more light-emitting surfaces of one or more optical segments onto a geometric plane parallel to the second optical element is at least 80% of the area of the projection of the second optical element onto the aforementioned geometric plane.
[0010] Because the divergence of the light beams entering the second optical element is advantageously reduced, these beams are sufficiently collimated, and because the total area of one or more light-emitting surfaces of the first optical element is configured to match the area of the second optical element in the manner defined above, the entire second optical element is illuminated sufficiently uniformly, and the light entering the second optical element is processed by light-shaping microstructures (e.g., a pincushion array) to produce the desired beam characteristics in a sufficiently uniform manner. Therefore, sufficiently uniform surface aesthetics can be achieved, and the desired light output with satisfactory glare requirements can be achieved using a smaller illuminator than when using, for example, a diffuser emitting light according to Lambert's cosine law or a microprism solution with a conical anti-glare prism array.
[0011] According to the present invention, a new lamp is also provided, comprising: - One or more light sources, such as one or more light-emitting diodes "LEDs", and - An optical system according to the invention, wherein the optical system is configured to modify the distribution of light emitted by one or more light sources.
[0012] Various exemplary and non-limiting embodiments are described in the appended dependent claims.
[0013] When read in conjunction with the accompanying drawings, the exemplary and non-limiting embodiments in terms of structure and operation, as well as their additional objects and advantages, will be best understood from the following description of specific exemplary embodiments.
[0014] The verbs “include” and “include” are used in this document as open restrictions that neither exclude nor require the existence of undescribed features.
[0015] Unless otherwise expressly stated, the features described in the dependent claims may be freely combined with each other.
[0016] Furthermore, it should be understood that the use of “a” or “one” (i.e., the singular form) throughout this document does not preclude multiple instances. Attached Figure Description
[0017] The exemplary and non-limiting embodiments and their advantages are explained in more detail below with reference to the accompanying drawings, in which: Figure 1a , Figure 1b , Figure 1c , Figure 1d and Figure 1e The illustration shows a luminaire including a light source and an optical system for modifying light distribution according to an illustrative and non-limiting embodiment; Figure 2a , Figure 2b , Figure 2c and Figure 2d The illustration shows a luminaire including a light source and an optical system for modifying light distribution according to another illustrative and non-limiting embodiment; and Figure 3a , Figure 3b and Figure 3c The illustration shows a luminaire including a light source and an optical system for modifying light distribution according to an illustrative and non-limiting embodiment. Detailed Implementation
[0018] The specific examples provided in the description below should not be construed as limiting the scope and / or applicability of the invention. Unless otherwise expressly stated, the list and groups of examples provided in the description below are not exhaustive.
[0019] Figure 1a and Figure 1b The illustration shows a luminaire according to an illustrative and non-limiting embodiment. Figure 1a It shows along Figure 1b The cross-section cut by line A2-A2 shown in the figure, and Figure 1b It shows along Figure 1a The cross-section cut by line A1-A1 is shown in the diagram. Figure 1aThe geometric section plane associated with the section shown is parallel to the yz plane of coordinate system 199, and is... Figure 1b The geometric cross-section plane shown is parallel to the xz plane of coordinate system 199.
[0020] The lighting fixture includes a light source, such as a light-emitting diode (LED). One component of the light source uses an auxiliary... Figure 1a The figure shows reference numeral 141a, and the three light sources are indicated by reference numeral 141a. Figure 1b Reference numerals 141a, 141b, and 141n are used to denote the light fixture. The luminaire includes an optical system 100, according to illustrative and non-limiting embodiments, for modifying the distribution of light emitted by a light source. Figure 1a and Figure 1b The mechanical structure configured to support the optical system 100 is not shown.
[0021] The optical system 100 includes a first optical element 101 made of a transparent material. This transparent material can be, for example, acrylic plastic, polycarbonate, optical silicone, or glass. The first optical element 101 has optical segments, each optical segment having a light-incident surface for receiving light from a corresponding light source in the light source and a light-exit surface for allowing light to exit the first optical element. Figure 1a In the attached figure, reference numeral 103a indicates one of the optical segments, in Figure 1b The figure uses reference numerals 103a, 103b, and 103n to denote three of the optical segments. Figure 1a In the figure, the light incident surface of optical section 103a is indicated by reference numeral 105, and the light emitting surface of optical section 103a is indicated by reference numeral 106. Figure 1a In the image, a dashed arrow depicts an example beam of light. For example... Figure 1a The illustrated beam shown in the diagram has each optical segment shaped to produce an optical effect such that the beam leaving the optical segment diverges less than the beam entering the optical segment. Advantageously, each optical segment is configured to substantially collimate the beam entering the optical segment.
[0022] The optical system 100 also includes a second optical element 102, which is planar and has photo-shaped microstructures. The material of the second optical element 102 can be, for example, acrylic plastic, polycarbonate, optical silicone, or glass. The microstructure can be, for example, an array of surface segments similar to each other, and each surface segment has a shape and size that deviates from the planar shape and size, such that per square centimeter (cm²) 2 The number of surface segments is at least 10, more preferably at least 25, and even more preferably at least 100.
[0023] The second optical element 102 is configured to receive light exiting from the first optical element 101. The dimensions of the first optical element 101 and the second optical element 102 are designed such that the area of the light-emitting surface of the optical segments 103a-103n of the first optical element 101 projected onto a geometric plane 150 parallel to the second optical element 102 is at least 80% of the area of the second optical element 102 projected onto the geometric plane 150. Figure 1a In this system, geometric plane 150 is parallel to the xy plane of coordinate system 199. Advantageously, the area of the projection of the light emitting surface is at least 85% of the area of the projection of the second optical element. More advantageously, the area of the projection of the light emitting surface is at least 90% of the area of the projection of the second optical element. Even more advantageously, the area of the projection of the light emitting surface is at least 95% of the area of the projection of the second optical element.
[0024] Because the divergence of the light beams entering the second optical element 102 is advantageously reduced, these beams are sufficiently collimated, and because the total area of the light-emitting surface of the first optical element 101 is configured to match the area of the second optical element 102 in the manner described above, the entire area of the second optical element 102 is uniformly illuminated, and the light entering the second optical element 102 is processed by the light-shaping microstructure to produce the desired beam characteristics in a sufficiently uniform manner. Therefore, the amount of unwanted stray light can be reduced, and a desired light output with satisfactory glare requirements can be achieved using a smaller illuminator than when using, for example, a diffuser emitting light according to Lambert's cosine law or when using a diffuser sheet together with an anti-glare prism. For example, the length of a linear office lighting fixture can be, for example, about 4 feet, or about 1220 mm, the required light output can be about 4000 lumens, and the glare requirement can be such that the Uniform Glare Rating (UGR) should be less than 19. In this example, Figure 1a and Figure 1b The width W of the luminaire shown in the figure needs to be about 40 mm, while the corresponding width of the luminaire with a diffuser that realizes Lambert's cosine law needs to be about 550 mm, and the corresponding width of the luminaire with an anti-glare prism array needs to be about 220 mm.
[0025] exist Figure 1a and Figure 1b In the illustrated exemplary optical system 100, each of the optical segments 103a-103n of the first optical element 101 includes two lens portions that are continuous with respect to each other in a direction perpendicular to the second optical element (i.e., in a direction parallel to the z-axis of coordinate system 199). Figure 1aIn the figure, the lens portions of optical segment 103a are indicated by reference numerals 107 and 108. The first lens portion 107 of the lens portion includes a light incident surface 105 and an auxiliary light exiting surface 109 of optical segment 103a. The second lens portion 108 of the lens portion includes an auxiliary light incident surface 110 for receiving light from the auxiliary light exiting surface 109 and a light exiting surface 106 of optical segment 103a. In this example, the two lens portions 107 and 108 are parts of the same piece of transparent material, such that in a direction perpendicular to the second optical element 102, i.e., in a direction parallel to the z-axis of coordinate system 199, a ray path exists within the transparent material from a point on the incident surface 105 to a point on the exiting surface 106.
[0026] exist Figure 1a and Figure 1b In the illustrated exemplary optical system 100, the light incident surface 105 is concave, the auxiliary light exiting surface 109 is convex, the auxiliary light incident surface 110 is planar, and the light exiting surface 106 is shaped to have a Fresnel pattern. Figure 1c A top view of the first optical element 101 is shown. The sides of the ridges of the Fresnel pattern are advantageously directed such that the light beam exiting the first optical element 101 through the light-emitting surface 106 is directed to bypass the tips of the ridges of the Fresnel pattern. Figure 1a In the figure, one of the tips is indicated by reference numeral 111. The illustrative beam of light, presented with dashed arrows on either side of tip 111, illustrates how the beam exiting the first optic 101 is guided around the tip of the Fresnel pattern ridge. The tip cannot ideally be sharp due to factors related to the fabrication of the Fresnel pattern; i.e., the tip is always rounded. Therefore, the beam passing through the tip may scatter in an undesirable manner, resulting in undesirable stray light, which makes the aesthetic effect less uniform. Therefore, the arrangement of light bypassing the tip reduces stray light and glare caused by stray light. On the other hand, the arrangement of light bypassing the tip results in a slight non-uniformity in the light distribution pattern on the light incident surface of the second optic 102. This non-uniformity in the light distribution pattern is addressed by the photoforming microstructure of the second optic 102, enabling the achievement of the desired result. Furthermore, if the beam exiting the first optic 101 is not perfectly collimated, the aforementioned non-uniformity is reduced.
[0027] exist Figure 1a and Figure 1bIn the illustrated exemplary optical system 100, photoforming microstructures are provided on both sides of the second optical element 102. However, photoforming microstructures may also be provided only on the light incident surface of the second optical element 102, or only on the light emitting surface of the second optical element 102.
[0028] exist Figure 1a and Figure 1b In the illustrated exemplary optical system 100, the light-shaping microstructure of the second optical element 102 is a pincushion array, similar to an anti-glare prism array, but designed to operate using collimated light instead of divergent light from a point source. Figure 1d It shows Figure 1a Enlarged view of section B in the middle. Figure 1e A portion of the pincushion array of the second optical element 102 is shown when viewed along a direction perpendicular to the second optical element 102 (i.e., along a direction parallel to the z-axis of coordinate system 199). However, it should be noted that embodiments of the invention are not limited to any particular geometry of the photoforming microstructure. Rather, different microstructures are possible in conjunction with embodiments of the invention.
[0029] Figure 2a and Figure 2b The illustration shows a luminaire according to an illustrative and non-limiting embodiment. Figure 2a It shows along Figure 2b The cross-section cut by line A2-A2 shown in the figure, and Figure 2b It shows along Figure 2a The cross-section cut by line A1-A1 is shown in the diagram. Figure 2a The geometric section plane associated with the section shown is parallel to the yz plane of coordinate system 299, and is... Figure 2b The geometric cross-section plane shown is parallel to the xz plane of coordinate system 299.
[0030] The lighting fixture includes a light source, such as a light-emitting diode (LED). One component of the light source uses an auxiliary... Figure 2a The figure in the figure is indicated by reference numeral 241a, and the three light sources are indicated by reference numeral 241a. Figure 2b Reference numerals 241a, 241b, and 241n are used to denote the light fixture. The luminaire includes an optical system 200, according to illustrative and non-limiting embodiments, for modifying the distribution of light emitted by a light source. Figure 2a and Figure 2b The mechanical structure configured to support the optical system 200 is not shown.
[0031] The optical system 200 includes a first optical element 201 made of a transparent material. This transparent material can be, for example, acrylic plastic, polycarbonate, optical silicone, or glass. The first optical element 201 has optical segments, each optical segment having a light-incident surface for receiving light from a corresponding light source in the light source and a light-exit surface for allowing light to exit the first optical element 201. Figure 2a In the attached figure, reference numeral 203a indicates one of the optical segments, in Figure 2b The figure uses reference numerals 203a, 203b, and 203n to denote three of the optical segments. Figure 2a In the figure, the light incident surface of optical section 203a is indicated by reference numeral 205, and the light emitting surface of optical section 203a is indicated by reference numeral 206. Figure 2a In the image, a dashed arrow depicts an example beam of light. For example... Figure 2a The illustrated beam shown in the diagram has each optical segment shaped to produce an optical effect such that the beam leaving the optical segment diverges less than the beam entering the optical segment. Advantageously, each optical segment is configured to substantially collimate the beam entering the optical segment.
[0032] The optical system 200 also includes a second optical element 202, which is planar and has photoforming microstructures. The material of the second optical element 202 can be, for example, acrylic plastic, polycarbonate, optical silicone, or glass. The second optical element 202 is configured to receive light exiting from the first optical element 201. The dimensions of the first optical element 201 and the second optical element 202 are designed such that the area of the light-emitting surface of the optical segments 203a-203n of the first optical element 201 projected onto a geometric plane 250 parallel to the second optical element 202 is at least 80% of the area of the second optical element 202 projected onto the geometric plane 250. Figure 2a In this system, geometric plane 250 is parallel to the xy plane of coordinate system 299. Advantageously, the area of the projection of the light emitting surface is at least 85% of the area of the projection of the second optical element. More advantageously, the area of the projection of the light emitting surface is at least 90% of the area of the projection of the second optical element. Even more advantageously, the area of the projection of the light emitting surface is at least 95% of the area of the projection of the second optical element.
[0033] exist Figure 2a and Figure 2bIn the illustrated exemplary optical system 200, each optical segment 203a-203n of the first optical element 201 is dome-shaped, such that the convex side of the dome-shaped optical segment faces the second optical element 202, and the concave side of the dome-shaped optical segment constitutes the light incident surface of the optical segment. In this exemplary case, the light incident surface of each optical segment 203a-203n is shaped to have a Fresnel pattern, and the optical effect of the optical segment is at least partially based on total internal reflection "TIR" on the side of the ridge of the Fresnel pattern. Figure 2c The light incident surface of the optical section of the second optical element 202 is shown. Figure 2d It shows Figure 2a Enlarged view of section B in the middle. Figure 2d The illustration shows the total internal reflection "TIR" on the side of the ridge of the aforementioned Fresnel pattern.
[0034] The second optical element 202 can be, for example, such as... Figure 1a , Figure 1b , Figure 1d and Figure 1e The photoforming microstructure of the second optical element 102, i.e., the second optical element 202, can be, for example, Figure 1d and Figure 1e The illustrated array of pincushion elements.
[0035] Figure 3a and Figure 3b The illustration shows a luminaire according to an illustrative and non-limiting embodiment. Figure 3a It shows along Figure 3b The cross-section cut by line A2-A2 shown in the figure, and Figure 3b It shows along Figure 3a The cross-section cut by line A1-A1 is shown in the diagram. Figure 3a The geometric section plane associated with the section shown is parallel to the yz plane of coordinate system 399, and is... Figure 3b The geometric cross-section plane associated with the cross-section shown is parallel to the xz plane of coordinate system 399.
[0036] Lighting fixtures include light sources that can be, for example, light-emitting diodes (LEDs). One of the light sources is... Figure 3a The figure is indicated by reference numeral 341a, and the three light sources are in Figure 3b The figures are designated by reference numerals 341a, 341b, and 341n. The luminaire includes an optical system 300, according to illustrative and non-limiting embodiments, for modifying the distribution of light emitted by a light source. Figure 3a and Figure 3b The mechanical structure configured to support the optical system 300 is not shown.
[0037] The optical system 300 includes a first optical element 301 made of a transparent material. This transparent material can be, for example, acrylic plastic, polycarbonate, optical silicone, or glass. The first optical element 301 has optical segments, each optical segment having a light-incident surface for receiving light from a corresponding light source in the light source and a light-exit surface for allowing light to exit the first optical element 301. Figure 3a In the accompanying drawing, reference numeral 303a indicates one of the optical segments, and... Figure 3b The figure uses reference numerals 303a, 303b, and 303n to denote three of the optical segments. Figure 3a In the figure, the light incident surface of optical section 303a is indicated by reference numeral 305, and the light emitting surface of optical section 303a is indicated by reference numeral 306. Figure 3a In the image, a dashed arrow depicts an example beam of light. For example... Figure 3a The illustrated beam shown in the diagram has each optical segment shaped to produce an optical effect such that the beam leaving the optical segment diverges less than the beam entering the optical segment. Advantageously, each optical segment is configured to substantially collimate the beam entering the optical segment.
[0038] The optical system 300 also includes a second optical element 302, which is planar and has photoforming microstructures. The material of the second optical element 302 can be, for example, acrylic plastic, polycarbonate, optical silicone, or glass. The second optical element 302 is configured to receive light exiting from the first optical element 301. The dimensions of the first optical element 301 and the second optical element 302 are designed such that the area of the light-emitting surface of the optical segments 303a-303n of the first optical element 301 projected onto a geometric plane 350 parallel to the second optical element 302 is at least 80% of the area of the second optical element 302 projected onto the geometric plane 350. Figure 3a In this system, geometric plane 350 is parallel to the xy plane of coordinate system 399. Advantageously, the area of the projection of the light emitting surface is at least 85% of the area of the projection of the second optical element. More advantageously, the area of the projection of the light emitting surface is at least 90% of the area of the projection of the second optical element. Even more advantageously, the area of the projection of the light emitting surface is at least 95% of the area of the projection of the second optical element.
[0039] exist Figure 3a and Figure 3b In the illustrated exemplary optical system 300, each of the optical segments 303a-303n of the first optical element 301 includes two lens portions in a direction perpendicular to the second optical element (i.e., in a direction parallel to the z-axis of coordinate system 399). Figure 3aIn the diagram, the lens portions of optical segment 303a are indicated by reference numerals 307 and 308. The first lens portion 307 includes a light-incident surface 305 and an auxiliary light-exiting surface 309 of optical segment 303a. The second lens portion 308 includes an auxiliary light-incident surface 310 for receiving light from the auxiliary light-exiting surface 309 and a light-exiting surface 306 of optical segment 303a. In this example, the two lens portions 307 and 308 are separate components, such that they are spaced apart from each other.
[0040] exist Figure 3a and Figure 3b In the illustrated exemplary optical system 300, when viewed along the geometric line 360 perpendicular to the second optical element 302, that is, when viewed along the z-axis of the coordinate system 399, the light incident surface 305 is concave, and the auxiliary light emitting surface 309 is substantially rectangular, that is, rectangular or rectangular with rounded corners. Figure 3c A perspective view of a lens portion 307 having an auxiliary light emitting surface 309 is shown. In this example, the auxiliary light emitting surface 309 has a recess in its center. The auxiliary light incident surface 310 is planar, and the light emitting surface 306 is shaped to have a Fresnel pattern.
[0041] The second optical element 302 can be, for example, such as... Figure 1a , Figure 1b , Figure 1d and Figure 1e The photoforming microstructure of the second optical element 102, i.e., the second optical element 302, shown can be, for example, Figure 1d and Figure 1e The shown is a pincushion-shaped element array.
[0042] The specific examples provided in the above description should not be construed as limiting the scope and / or applicability of the invention. Unless otherwise expressly stated, the list and groups of examples provided in the above description are not exhaustive.
Claims
1. An optical system (100, 200, 300) for modifying light distribution, said optical system comprising: - A first optical element (101, 201, 301), the first optical element being made of a transparent material and having one or more optical segments (103a-103n, 203a-203n, 303a-303n), each optical segment having a light-incident surface (105, 205, 305) for receiving diverging light from a light source and a light-exit surface (106, 206, 306) for allowing light to exit the first optical element, each optical segment being shaped to produce an optical effect such that the light beam exiting the optical segment diverges less than the light beam entering the optical segment, and - A second optical element (102, 202, 302), which is planar and has a light-shaping microstructure, and is configured to receive light exiting from the first optical element. The characteristic feature is that the area of the projection of the one or more light emitting surfaces of the one or more optical segments of the first optical element onto a geometric plane (150, 250, 350) parallel to the second optical element is at least 80% of the area of the projection of the second optical element onto the geometric plane.
2. The optical system according to claim 1, wherein, The area of the projection of the one or more light-emitting surfaces of the one or more optical segments of the first optical element is at least 85% of the area of the projection of the second optical element.
3. The optical system according to claim 1, wherein, The area of the projection of the one or more light-emitting surfaces of the one or more optical segments of the first optical element is at least 90% of the area of the projection of the second optical element.
4. The optical system according to claim 1, wherein, The area of the projection of the one or more light-emitting surfaces of the one or more optical segments of the first optical element is at least 95% of the area of the projection of the second optical element.
5. The optical system according to any one of claims 1-4, wherein, Each optical segment (103a-103n, 303a-303n) of the first optical element includes two lens portions (107, 108, 307, 308) that are consecutive to each other in a direction (z) perpendicular to the second optical element, such that the first lens portion (107, 307) of the lens portion includes the light incident surface (105, 305) and the auxiliary light emitting surface (109, 309), and the second lens portion (108, 308) of the lens portion includes an auxiliary light incident surface (110, 310) and the light emitting surface (106, 306) for receiving light from the auxiliary light emitting surface.
6. The optical system according to claim 5, wherein, The two lens portions (107, 108) are components of the same part of the transparent material, such that in the direction (z) perpendicular to the second optical element, there exists a light path inside the transparent material from a point on the incident surface to a point on the exiting surface.
7. The optical system according to claim 5 or 6, wherein, The light incident surface (105) is concave, the auxiliary light emitting surface (109) is convex, and the auxiliary light incident surface (110) is planar.
8. The optical system according to claim 5, wherein, The two lens portions (307, 308) are separate components, such that the components are a distance apart from each other.
9. The optical system according to claim 8, wherein, The light incident surface (305) is concave, the auxiliary light emitting surface (309) is rectangular or rectangular with rounded corners when viewed along a geometric line (360) perpendicular to the second optical element (302), and the auxiliary light incident surface (310) is planar.
10. The optical system according to claim 9, wherein, The auxiliary light emitting surface (309) has a recess in the center.
11. The optical system according to any one of claims 1-10, wherein, The light-emitting surfaces (106, 306) are shaped to have a Fresnel pattern.
12. The optical system according to claim 11, wherein, The sides of the ridge of the Fresnel pattern are guided such that a light beam exiting the first optical device through the light-emitting surface is directed to bypass the tip (111) of the ridge of the Fresnel pattern.
13. The optical system according to any one of claims 1-4, wherein, Each optical segment (203a-203n) of the first optical element (201) is dome-shaped, such that the convex side of the dome-shaped optical segment faces the second optical element, and the concave side of the dome-shaped optical segment constitutes the light incident surface (205).
14. The optical system according to claim 13, wherein, The light incident surface (205) is shaped to have a Fresnel pattern, and the optical effect of the optical segment is based at least in part on total internal reflection on the sides of the ridges of the Fresnel pattern.
15. The optical system according to any one of claims 1-14, wherein, The transparent material of the first optical element is one of the following: acrylic plastic, polycarbonate, optical silicone resin, or glass.
16. The optical system according to any one of claims 1-15, wherein, The material of the second optical element is one of the following: acrylic plastic, polycarbonate, optical silicone resin, or glass.
17. A lighting fixture, comprising: - One or more light sources (141a-141n, 241a-241n, 341a-341n), and - An optical system (100, 200) according to any one of claims 1-16, wherein the optical system is configured to modify the distribution of light emitted by the one or more light sources.
18. The luminaire according to claim 17, wherein, Each optical segment of the first optical element of the optical system is configured to receive light from one and only one of the one or more light sources.