Optical structure with high luminous efficiency and approach channel indicating lamp

Abstract

The utility model provides an optical structure with high light emitting efficiency and an approach channel indicating lamp, the optical structure with high light emitting efficiency is used for redistributing light energy of scattered light source arrays and enabling the scattered light source arrays with different colors at the upper layer and the lower layer to project light spots with obvious boundaries, and the optical structure comprises a TIR lens assembly and a light source assembly, the TIR lens assembly covers the heat dissipation light source, and emergent light rays of the scattering light source arrays with different colors on the upper layer and the lower layer are deflected through the TIR lens assembly and then are gathered in the middle axis direction of the scattering light source arrays. The light uniformizing rod and the imaging lens group are arranged on the light emitting side of the TIR lens assembly, the light uniformizing rod is divided into an upper area and a lower area which correspond to the colors of the upper layer and the lower layer of the scattering light source array by the plated reflecting film layer, and emergent light is projected to a farther distance by the imaging lens group and forms light spots with obvious boundaries; the precise approach channel indicating system solves the problems that in the prior art, a precise approach channel indicating system is low in lamp lighting effect, multiple in optical device, complex in structure and overlarge in power.

Description

Technical Field

[0001] The utility model relates to the technical field of channel indication, in particular to an optical structure with high light output efficiency and an approach channel indicator light. Background Art

[0002] The localizer system is a series of equipment and systems used to help pilots navigate correctly during the approach and landing phases. These systems are designed to improve flight safety, reduce pilot workload, and ensure that the aircraft can land safely in all weather conditions.

[0003] The precision approach course indication system currently used in airport navigation lighting can indicate five types of slope signals, namely: above the approach course, slightly above the approach course, on the approach course, slightly below the approach course and below the approach course. The correct approach course slope is 3°.

[0004] The main optical architecture of the current precision approach path indication system lighting is as follows:

[0005] 1. Use collimated halogen light source, filter and imaging lens to form the required lighting distribution angle and better light spot cutoff line. The advantage is that a better light spot cutoff line can be formed. The disadvantage is that the light output efficiency is very low, resulting in low light intensity and unable to form a clear indication effect.

[0006] 2. Use LED light source plus collimating lens, use light homogenizing rod to form red and white cut-off line, and then use imaging lens to form required lighting angle and better spot cut-off line. The advantage is that better spot cut-off line can be formed, and the light output efficiency and light effect are improved, but higher light output efficiency cannot be obtained.

[0007] At present, the above two optical architectures cannot significantly improve the light efficiency of the optical system. At the same time, there are too many optical devices, the optical structure is complex, and the light decay is serious, which leads to excessive power of the whole lamp. Utility Model Content

[0008] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the present invention is to provide an optical structure with high light output efficiency and an approach channel indicator light, so as to solve the problems of low light efficiency of lamps of the precision approach channel indicator system in the prior art, complex structure of optical devices and excessive power.

[0009] In order to solve the above technical problems, the utility model provides an optical structure with high light extraction efficiency, which is used to redistribute the light energy of the scattered light source array, and make the scattered light source arrays with different colors in the upper and lower layers project a light spot with a clear dividing line, including:

[0010] A TIR lens assembly, wherein the TIR lens assembly is projected onto the heat dissipation light source, and the outgoing light rays of the upper and lower layers of the scattered light source arrays with different colors are deflected by the TIR lens assembly and gathered toward the central axis direction of the scattered light source array;

[0011] A light homogenizer, wherein the light homogenizer is arranged on the light output side of the TIR lens assembly, and a reflective film layer is plated in the middle of the light homogenizer, and the reflective film layer divides the light homogenizer into an upper area and a lower area corresponding to the colors of the upper and lower layers of the scattered light source array, and the outgoing light of the upper layer of the scattered light source array is deflected by the TIR lens assembly and then incident on the upper area of ​​the light homogenizer, and the outgoing light of the lower layer of the scattered light source array is deflected by the TIR lens assembly and then incident on the lower area of ​​the light homogenizer;

[0012] The imaging lens group is arranged on the light-emitting side of the light-homogenizing rod. The light rays of different colors emitted from the upper and lower regions of the light-homogenizing rod are projected to a farther distance through the imaging lens group and form a light spot with a clear dividing line.

[0013] As a more preferred embodiment, the TIR lens assembly includes a plurality of TIR lenses and refractive prisms corresponding to the TIR lenses one by one, and the refractive prisms are arranged on the outgoing light of the TIR lenses. The number of the TIR lenses is consistent with the number of single light sources of the scattered light source array, and the TIR lenses are respectively covered on the single light sources. The outgoing light of the single light source is deflected by the TIR lenses toward the refractive prisms and further deflected toward the central axis direction of the scattered light source array through the refractive prisms.

[0014] As a more preferred embodiment, the TIR lens includes a light guide cover, the light guide cover includes a light inlet and a light outlet, the scattered light source array is arranged at the light inlet, the refractive prism is arranged at the light outlet, and the outgoing light of the scattered light source array passes through the light outlet and is emitted to the refractive prism.

[0015] As a more preferred embodiment, the TIR lens also includes a lens structure arranged in the light guide cover, and a TIR total reflection surface is arranged on the inner side of the light guide cover. A part of the outgoing light from the scattered light source array is refracted by the lens structure and directly emitted from the light outlet, and another part of the outgoing light is refracted by the lens structure and emitted toward the TIR total reflection surface, and then emitted from the light outlet after being reflected by the TIR total reflection surface.

[0016] As a more preferred embodiment, the lens structure includes a refractive cover and a refractive lens covering one end of the refractive cover, and the other end of the refractive cover is covered on the light inlet of the light guide cover. A portion of the outgoing light from the scattered light source array is refracted by the refractive lens and directly emitted from the light outlet, and another portion of the outgoing light is refracted by the refractive cover and emitted toward the TIR total reflection surface, and then emitted from the light outlet after being reflected by the TIR total reflection surface.

[0017] As a more preferred manner, a light homogenizing film is attached to the light-incoming end of the light homogenizing rod facing the TIR lens assembly to improve the uniformity of the projected light spot.

[0018] As a more preferred manner, the imaging lens group includes a first concave-convex lens, a second concave-convex lens and a double convex lens which are sequentially arranged along the direction of the outgoing light from the scattered light source array, thereby projecting the outgoing light to a farther distance and forming the required light intensity distribution.

[0019] In order to solve the above problems, the utility model also provides an approach channel indicator light, comprising:

[0020] The above optical structure with high light extraction efficiency;

[0021] An LED light source array adapted to the optical structure with high light extraction efficiency, wherein the optical structure with high light extraction efficiency is covered on the LED light source array, and the upper and lower layers of the LED light source array have different colors.

[0022] As a more preferred embodiment, the LED light source array includes a heat dissipation substrate and a plurality of red LED lamp beads and white LED lamp beads arranged on one side of the heat dissipation substrate, and the plurality of red LED lamp beads and white LED lamp beads are symmetrically arranged in arrays on the heat dissipation substrate.

[0023] As a more preferred method, the heat dissipation substrate is made of ceramic material. The ceramic material has a high thermal conductivity, which means that it can more effectively conduct heat from the LED lamp beads to the external environment, thereby improving the heat dissipation efficiency; at the same time, the ceramic material also has good insulation properties, which can ensure electrical safety and prevent short circuits and leakage; secondly, the ceramic material has good chemical stability, is not easy to react chemically with other substances, has good corrosion resistance and oxidation resistance, and is suitable for use in various environments; finally, since the ceramic substrate has little dimensional change under temperature changes, it helps to maintain the stability and consistency of the LED lamp beads.

[0024] As described above, the optical structure with high light extraction efficiency and the approach channel indicator light of the utility model have the following beneficial effects: when the optical structure with high light extraction efficiency of the utility model is in use, the emitted light of the scattered light source arrays of the upper and lower layers with different colors is deflected by the TIR lens assembly and then gathered toward the central axis direction of the scattered light source array. Combined with the advantages of the TIR lens, its special polarization design can redistribute the light energy as much as possible, making the light more concentrated, thereby improving the collimation and range of the emitted light, and at the same time reducing the escape of light through total internal reflection, so it can achieve The light utilization rate is as high as 90% or more, so a higher light extraction efficiency can be obtained; the outgoing light from the upper layer of the scattered light source array is deflected by the TIR lens assembly and then injected into the upper area of ​​the light homogenizing rod, and the outgoing light from the lower layer of the scattered light source array is deflected by the TIR lens assembly and then injected into the lower area of ​​the light homogenizing rod. Since the middle of the light homogenizing rod is coated with a reflective film layer, the cross-light problem caused by the mutual interference of the outgoing light from the upper and lower layers of the scattered light source array in the light homogenizing rod is avoided, and finally, under the action of the imaging lens group, it is projected to a farther distance and forms a light spot with a clear dividing line at the same time;

[0025] The approach channel indicator lamp of the utility model adopts the above optical structure with high light output efficiency, so it can project a light spot with a clear dividing line that meets the approach channel indication requirements; at the same time, due to the use of the TIR lens assembly, there is no need to additionally set a collimating lens, which has simplified the optical devices and optical structures, and reduced the light decay, thereby obtaining a higher light efficiency, and thus improving the light intensity value of the entire lamp; at the same time, thanks to the use of the LED light source array, since the LED light source directly converts electrical energy into light energy, its conversion efficiency is very high, so when the same light intensity is achieved, the power required by the LED light source array is much smaller than that of the traditional halogen light source, thereby reducing the heat dissipation requirements, and the design of the heat dissipation structure can also be further simplified;

[0026] In summary, the optical structure with high light output efficiency and the approach channel indicator light of the utility model improve the light efficiency, simplify the optical structure, reduce the light decay and power through the combination of TIR lens and LED light source characteristics, and solve the problems of low light efficiency, complex structure of optical devices and excessive power of the precision approach channel indicator system lamps in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The schematic diagram of the structure of the TIR lens assembly of the utility model with a high light extraction efficiency is shown;

[0028] Figure 2 Shown is a schematic diagram of an optical structure with high light extraction efficiency of the utility model;

[0029] Figure 3Shown is a schematic diagram of an LED light source array of an approach channel indicator light of the present invention;

[0030] Figure 4 Shown is a schematic diagram of the light spot of the approach channel indicator light of the present invention.

[0031] Component number description

[0032] 1 TIR lens assembly

[0033] 11 TIR lens

[0034] 111 TIR total reflection surface

[0035] 112 Lens Structure

[0036] 112a Refraction hood

[0037] 112b Refractive lens

[0038] 12 Refracting Prism

[0039] 2 Light diffuser

[0040] 21 Reflective film

[0041] 22 Light homogenization film

[0042] 3 Imaging lens group

[0043] 31 First meniscus lens

[0044] 32 Second meniscus lens

[0045] 33 Biconvex lens

[0046] 4 LED light source array

[0047] 41 Heat dissipation substrate

[0048] 42 red LED lamp beads

[0049] 43 white light LED lamp beads DETAILED DESCRIPTION

[0050] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0051] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0054] like Figure 1 as well as Figure 2 As shown, the utility model provides an optical structure with high light extraction efficiency, which is used to redistribute the light energy of the scattered light source array, and enables the scattered light source arrays with different colors in the upper and lower layers to project light spots with obvious dividing lines, including:

[0055] A TIR lens assembly 1, wherein the TIR lens assembly 1 is projected onto the heat dissipation light source, and the outgoing light rays of the upper and lower layers of the scattered light source arrays with different colors are deflected by the TIR lens assembly 1 and converged toward the central axis direction of the scattered light source array;

[0056] A light homogenizer 2, wherein the light homogenizer 2 is arranged on the light output side of the TIR lens assembly 1, and a reflective film layer 21 is plated in the middle of the light homogenizer 2, and the reflective film layer 21 divides the light homogenizer 2 into an upper area and a lower area corresponding to the colors of the upper and lower layers of the scattered light source array, and the outgoing light of the upper layer of the scattered light source array is deflected by the TIR lens assembly 1 and then incident on the upper area of ​​the light homogenizer 2, and the outgoing light of the lower layer of the scattered light source array is deflected by the TIR lens assembly 1 and then incident on the lower area of ​​the light homogenizer 2;

[0057] The imaging lens group 3 is arranged on the light-emitting side of the light-homogenizing rod 2. The light rays of different colors emitted from the upper and lower regions of the light-homogenizing rod 2 are projected to a farther distance through the imaging lens group 3 and form a light spot with a clear dividing line.

[0058] In order to better introduce the optical structure with high light extraction efficiency of the utility model, the following specific application is used to illustrate: when the optical structure with high light extraction efficiency of the utility model is used, the outgoing light of the scattered light source arrays of the upper and lower layers with different colors is deflected by the TIR lens assembly 1 and gathered toward the central axis direction of the scattered light source array. Combined with the advantages of the TIR lens 11, its special polarization design can redistribute the light energy as much as possible, making the light more concentrated, thereby improving the collimation and range of the outgoing light, and reducing the escape of light through total internal reflection, so that up to 9 The light utilization rate is more than 0%, so a higher light extraction efficiency can be obtained; the outgoing light of the upper layer of the scattered light source array is deflected by the TIR lens assembly 1 and then shot into the upper area of ​​the light homogenizing rod 2, and the outgoing light of the lower layer of the scattered light source array is deflected by the TIR lens assembly 1 and then shot into the lower area of ​​the light homogenizing rod 2. Since the light homogenizing rod 2 is coated with a reflective film layer 21 in the middle, the cross-light problem caused by the mutual interference of the outgoing light of the upper and lower layers of the scattered light source array in the light homogenizing rod 2 is avoided, and finally, under the action of the imaging lens group 3, it is projected to a farther distance and forms a light spot with a clear dividing line at the same time.

[0059] In this embodiment, if Figure 1 as well as Figure 2As shown, the TIR lens assembly 1 includes a plurality of TIR lenses 11 and refractive prisms 12 corresponding one to one with the TIR lenses 11, and the refractive prisms 12 are arranged on the outgoing light of the TIR lenses 11. The number of the TIR lenses 11 is consistent with the number of single light sources of the scattered light source array, and the TIR lenses 11 are respectively covered on the single light sources. The outgoing light of the single light source is deflected by the TIR lenses 11 toward the refractive prism 12 and further deflected toward the central axis direction of the scattered light source array through the refractive prism 12.

[0060] In this embodiment, if Figure 1 as well as Figure 2 As shown, the TIR lens 11 includes a light guide cover, which includes a light inlet and a light outlet. The scattered light source array is arranged at the light inlet, and the refractive prism 12 is arranged at the light outlet. The outgoing light of the scattered light source array passes through the light outlet and is emitted to the refractive prism 12.

[0061] In this embodiment, if Figure 1 as well as Figure 2 As shown, the TIR lens 11 also includes a lens structure 112 arranged in the light guide cover, and a TIR total reflection surface 111 is arranged on the inner side of the light guide cover. A part of the outgoing light of the scattered light source array is refracted by the lens structure 112 and directly emitted from the light outlet, and another part of the outgoing light is refracted by the lens structure 112 and emitted toward the TIR total reflection surface 111, and then emitted from the light outlet after being reflected by the TIR total reflection surface 111.

[0062] In this embodiment, if Figure 1 as well as Figure 2 As shown, the lens structure 112 includes a refractive cover 112a and a refractive lens 112b covering one end of the refractive cover 112a, and the other end of the refractive cover 112a is covered on the light inlet of the light guide cover. A portion of the outgoing light from the scattered light source array is refracted by the refractive lens 112b and directly emitted from the light outlet, and another portion of the outgoing light is refracted by the refractive cover 112a and emitted toward the TIR total reflection surface 111, and is emitted from the light outlet after being reflected by the TIR total reflection surface 111.

[0063] In this embodiment, if Figure 2 As shown, the light-incoming end of the light-increasing rod 2 facing the TIR lens assembly 1 is attached with a light-increasing film 22. Because the optical angle of the TIR lens 11 is relatively small, uneven light spots are prone to occur, so the light-increasing film 22 is attached to improve the uniformity of the light spots.

[0064] In this embodiment, if Figure 2As shown, the imaging lens group 3 includes a first concave-convex lens 31, a second concave-convex lens 32 and a double convex lens 33 which are arranged in sequence along the direction of the emitted light from the scattered light source array, thereby projecting the emitted light to a farther distance and forming the required light intensity distribution; as another solution, the imaging lens group 3 can also be composed of three plano-convex lenses arranged in sequence, which can also achieve a similar effect.

[0065] In order to solve the above problems, the utility model also provides an approach channel indicator light, comprising:

[0066] The above optical structure with high light extraction efficiency;

[0067] An LED light source array 4 adapted to the optical structure with high light extraction efficiency, wherein the optical structure with high light extraction efficiency is covered on the LED light source array 4, and the upper and lower layers of the LED light source array 4 have different colors.

[0068] In order to better introduce the approach channel indicator light of the present invention, the following specific applications are used for illustration: the approach channel indicator light of the present invention adopts the above optical structure with high light output efficiency, so that it can project a light spot with a clear demarcation line that meets the approach channel indication requirements; at the same time, due to the use of the TIR lens assembly 1, there is no need to additionally set a collimating lens, which simplifies the optical devices and optical structure, reduces the light decay, thereby obtaining a higher light efficiency, and thus improving the light intensity value of the entire lamp; at the same time, thanks to the use of the LED light source array 4, since the LED light source directly converts electrical energy into The conversion efficiency of light energy is very high. Therefore, when achieving the same light intensity, the power required by the LED light source array 4 is much smaller than that of the traditional halogen light source, thereby reducing the need for heat dissipation, and the design of the heat dissipation structure can be further simplified. It can be seen that the optical structure with high light output efficiency and the approach channel indicator light of the utility model, through the combination of the TIR lens 11 and the characteristics of the LED light source, improve the light efficiency, simplify the optical structure, reduce the light decay and power, and solve the problems of low light efficiency of the precision approach channel indicator system lamps, complex structure of optical devices and excessive power in the prior art.

[0069] In this embodiment, if Figure 3 As shown, the LED light source array 4 includes a heat dissipation substrate 41 and a plurality of red light LED lamp beads 42 and white light LED lamp beads 43 arranged on one side of the heat dissipation substrate 41. The plurality of red light LED lamp beads 42 and white light LED lamp beads 43 are symmetrically arranged in arrays on the heat dissipation substrate 41.

[0070] In this embodiment, the heat dissipation substrate 41 is made of ceramic material. The ceramic material has a high thermal conductivity, which means that it can more effectively conduct heat from the LED lamp beads to the external environment, thereby improving the heat dissipation efficiency; at the same time, the ceramic material also has good insulation properties, which can ensure electrical safety and prevent short circuits and leakage; secondly, the ceramic material has good chemical stability, is not easy to react chemically with other substances, has good corrosion resistance and oxidation resistance, and is suitable for use in various environments; finally, since the ceramic substrate has little dimensional change under temperature changes, it helps to maintain the stability and consistency of the LED lamp beads.

[0071] More specifically, in this embodiment, if Figure 3 As shown, the red LED lamp beads 42 include two rows arranged in an array on one side of the heat dissipation substrate 41. Similarly, the white LED lamp beads 43 also include two rows arranged in an array on the other side of the heat dissipation substrate 41. The red LED lamp beads 42 and the white LED lamp beads 43 are symmetrically distributed about the midline of one side of the heat dissipation substrate 41. Furthermore, in this embodiment, the first row of the red LED lamp beads 42 is provided with four, and the second row of the red LED lamp beads 42 is provided with six, and the white LED lamp beads 43 and the red LED lamp beads 42 are symmetrically arranged, which will not be repeated here.

[0072] Meanwhile, in this embodiment, if Figure 3 As shown, the TIR lens assembly 1 also includes four rows of TIR lenses 11 and refractive prisms 12 corresponding to the red LED lamp beads 42 and the white LED lamp beads 43; similarly, the first row is provided with four TIR lenses 11 and refractive prisms 12 corresponding to the first row of red LED lamp beads 42; the second row is provided with six TIR lenses 11 and refractive prisms 12 corresponding to the second row of red LED lamp beads 42; the third row is provided with six TIR lenses 11 and refractive prisms 12 corresponding to the second row of white LED lamp beads 43; The fourth row is provided with four TIR lenses 11 and refractive prisms 12 corresponding to the first row of white light LED lamp beads 43. At the same time, the four rows of TIR lenses 11 and refractive prisms 12 are also symmetrical about the midline of one side of the heat dissipation substrate 41; and in the present embodiment, all the above-mentioned TIR lenses 11 and refractive prisms 12 are integrally formed by mold injection molding to ensure product consistency; further, in the present embodiment, the outer contour of the light homogenizing rod 2 is a rectangular parallelepiped, and its light inlet and light outlet ends are both rectangular, so as to adapt to the distribution of the LED lamp beads.

[0073] Finally, in this embodiment, the central transition angle between the red light and the white light of the light spot formed by the imaging lens group 3 satisfies that it is less than 3', and the edge transition angle is less than 5'. Figure 4 shown.

[0074] In summary, the optical structure with high light extraction efficiency and the approach channel indicator light of the utility model have the following advantages:

[0075] 1. High light extraction efficiency: Through the special polarization design of the TIR lens assembly 1, a light utilization rate of more than 90% is achieved, which significantly improves the collimation and range of the emitted light.

[0076] 2. Redistribution of light energy: The TIR lens assembly 1 can redistribute the light energy of the scattered light source array, making the light more concentrated and reducing the escape of light.

[0077] 3. Light spot with obvious boundary line: The reflective film layer 21 in the middle of the light homogenizing rod 2 avoids mutual interference of the upper and lower layers of emitted light, and the imaging lens group 3 further projects a light spot with obvious boundary line.

[0078] 4. Structural optimization: The design of the TIR lens assembly 1, including the light guide cover and the lens structure 112, allows the light from the scattered light source to be emitted from the light outlet after refraction and total reflection, thereby improving the optical efficiency.

[0079] 5. Improvement of light spot uniformity: The light-homogenizing rod 2 is attached with a light-homogenizing film 22 , which improves the uneven light spot caused by the small optical angle of the TIR lens 11 .

[0080] 6. Flexible design of imaging lens group 3: The imaging lens group 3 can adopt different lens combinations to achieve long-distance projection and required light intensity distribution.

[0081] 7. Application of LED light source array 4: The use of LED light source array 4 improves conversion efficiency, reduces power requirements, reduces heat dissipation requirements, and simplifies heat dissipation structure design.

[0082] 8. Improved heat dissipation efficiency: The heat dissipation substrate 41 made of ceramic material has good thermal conductivity and insulation, which improves the heat dissipation efficiency and ensures electrical safety.

[0083] 9. Product consistency guarantee: The TIR lens assembly 1 and the refractive prism 12 are integrally formed by mold injection, which ensures the consistency of the product.

[0084] 10. Symmetrical arrangement design: The red and white LED lamp beads 43 are symmetrically distributed about the center line of the heat dissipation substrate 41, which optimizes the layout of the light source array.

[0085] This patent achieves efficient light utilization and high-quality light spot projection through innovative optical structure design. The combination of TIR lens assembly 1 and homogenizing rod 2, as well as the flexible design of imaging lens group 3, work together on the scattered light source array, so that light sources with different colors in the upper and lower layers can project light spots with obvious dividing lines. At the same time, the application of LED light source array 4 and ceramic heat dissipation substrate 41 further improves the overall light efficiency and heat dissipation efficiency, simplifies optical devices and structures, reduces power requirements, and provides an efficient, simple and reliable solution for the precision approach channel indication system. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0086] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An optical structure with high light extraction efficiency, used to redistribute the light energy of a scattered light source array, and to make the scattered light source arrays with different colors in the upper and lower layers project a light spot with a clear dividing line, characterized in that: include: A TIR lens assembly (1), wherein the TIR lens assembly (1) is projected onto the heat dissipation light source, and the outgoing light rays of the upper and lower layers of the scattered light source arrays with different colors are deflected by the TIR lens assembly (1) and then gathered toward the central axis direction of the scattered light source array; A light homogenizer (2), the light homogenizer (2) being arranged on the light output side of the TIR lens assembly (1), the light homogenizer (2) being coated with a reflective film layer (21) in the middle, the reflective film layer (21) dividing the light homogenizer (2) into an upper region and a lower region corresponding to the colors of the upper and lower layers of the scattered light source array, the outgoing light of the upper layer of the scattered light source array being deflected by the TIR lens assembly (1) and incident on the upper region of the light homogenizer (2), and the outgoing light of the lower layer of the scattered light source array being deflected by the TIR lens assembly (1) and incident on the lower region of the light homogenizer (2); An imaging lens group (3) is arranged on the light-emitting side of the light-homogenizing rod (2), and light rays of different colors emitted from the upper area and the lower area of ​​the light-homogenizing rod (2) are projected to a farther distance through the imaging lens group (3) and form a light spot with a clear dividing line.

2. The optical structure with high light extraction efficiency according to claim 1, characterized in that: The TIR lens assembly (1) comprises a plurality of TIR lenses (11) and refractive prisms (12) corresponding one to the TIR lenses (11), wherein the refractive prisms (12) are arranged on the outgoing light of the TIR lenses (11), the number of the TIR lenses (11) is consistent with the number of individual light sources of the scattered light source array, the TIR lenses (11) are respectively covered on the individual light sources, and the outgoing light of the individual light sources is deflected by the TIR lenses (11) toward the refractive prisms (12) and further deflected toward the central axis direction of the scattered light source array through the refractive prisms (12).

3. The optical structure with high light extraction efficiency according to claim 2, characterized in that: The TIR lens (11) comprises a light guide cover, the light guide cover comprises a light inlet and a light outlet, the scattered light source array is arranged at the light inlet, the refractive prism (12) is arranged at the light outlet, and the outgoing light of the scattered light source array passes through the light outlet and is emitted toward the refractive prism (12).

4. The optical structure with high light extraction efficiency according to claim 3, characterized in that: The TIR lens (11) further comprises a lens structure (112) arranged in the light guide cover, a TIR total reflection surface (111) being arranged on the inner side of the light guide cover, a part of the outgoing light rays of the scattered light source array being refracted by the lens structure (112) and being directly emitted from the light outlet, and another part of the outgoing light rays being refracted by the lens structure (112) and being emitted towards the TIR total reflection surface (111), being reflected by the TIR total reflection surface (111) and being emitted from the light outlet.

5. The optical structure with high light extraction efficiency according to claim 4, characterized in that: The lens structure (112) comprises a refractive cover (112a) and a refractive lens (112b) covering one end of the refractive cover (112a); the other end of the refractive cover (112a) is arranged on the light inlet of the light guide cover; a portion of the emitted light from the scattered light source array is refracted by the refractive lens (112b) and directly emitted from the light outlet; another portion of the emitted light is refracted by the refractive cover (112a) and emitted toward the TIR total reflection surface (111), and is reflected by the TIR total reflection surface (111) and then emitted from the light outlet.

6. The optical structure with high light extraction efficiency according to claim 1, characterized in that: A light homogenizing film (22) is attached to the light-incoming end of the light homogenizing rod (2) facing the TIR lens assembly (1) to improve the uniformity of the projected light spot.

7. The optical structure with high light extraction efficiency according to claim 1, characterized in that: The imaging lens group (3) comprises a first concave-convex lens (31), a second concave-convex lens (32) and a biconvex lens (33) which are arranged in sequence along the direction of light emitted by the scattered light source array.

8. An approach channel indicator light, characterized in that: include: The optical structure with high light extraction efficiency as claimed in any one of claims 1 to 7; An LED light source array (4) adapted to the optical structure with high light extraction efficiency, the optical structure with high light extraction efficiency is covered on the LED light source array (4), and the upper and lower layers of the LED light source array (4) have different colors.

9. The approach channel indicator light according to claim 8, characterized in that: The LED light source array (4) comprises a heat dissipation substrate (41) and a plurality of red light LED lamp beads (42) and white light LED lamp beads (43) arranged on a side surface of the heat dissipation substrate (41); the plurality of red light LED lamp beads (42) and white light LED lamp beads (43) are symmetrically arranged in an array on the heat dissipation substrate (41).

10. The approach channel indicator light according to claim 9, characterized in that: The heat dissipation substrate (41) is made of ceramic material.

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