Optical system and vehicle lamp

Abstract

The utility model discloses an optical system and an automobile lamp, and relates to the technical field of automobile lighting. The optical system comprises a light source, a light guide and a mounting structure, the mounting structure is arranged at the end of the light guide and used for mounting the light guide in the vehicle lamp, and the light source is correspondingly arranged on the side, where the light inlet face is located, of the mounting structure, so that part of light emitted by the light source enters the light guide through the light outlet face of the mounting structure and is emitted towards a light emitting area; the installation structure is provided with a microstructure, so that the other part of light which is emitted by the light source and cannot enter the light guide through the installation structure is emitted towards the side away from the light-emitting area through the microstructure. The optical system and the vehicle lamp can reduce the influence of stray light on the lighting effect and improve the lighting uniformity.

Description

Technical Field

[0001] The present application relates to the field of automobile lighting technology, and in particular to an optical system and an automobile lamp. Background Art

[0002] In recent years, with the popularization of LED in car lights, more possibilities are provided for the appearance design of car lights. At present, light guides can be used as light guides in car lights to realize lighting of car lights.

[0003] In the prior art, when realizing the corresponding installation of the light guide and the LED, it is usually necessary to set a mounting structure on the light guide. The mounting structure is usually also a transparent part. The LED is generally set corresponding to the mounting structure close to the end of the light guide, so that the light emitted by the LED can enter the light guide after passing through the mounting structure. However, since the light emitted by the LED is divergent light, some of the light will not enter the light guide after passing through the mounting structure, but will be emitted from other sides of the mounting structure. This part of the light will be projected onto the light-emitting area to form a bright spot, which will affect the light emission type of the light guide and the lighting effect of the car lamp. Utility Model Content

[0004] The purpose of the present application is to provide an optical system and a vehicle lamp, which can reduce the influence of stray light on the lighting effect and improve the lighting uniformity.

[0005] The embodiment of the present application is implemented as follows:

[0006] In a first aspect of the embodiments of the present application, an optical system is provided, comprising a light source, a light guide and a mounting structure, wherein the mounting structure is arranged at the end of the light guide for mounting the light guide in a vehicle lamp, and the light source is arranged correspondingly on the side where the light incident surface of the mounting structure is located, so that a part of the light emitted by the light source enters the light guide through the light exit surface of the mounting structure and exits toward a light emitting area; a microstructure is arranged on the mounting structure, so that another part of the light emitted by the light source that cannot enter the light guide through the mounting structure exits toward a side away from the light emitting area through the microstructure. The optical system can reduce the influence of stray light on the lighting effect and improve the lighting uniformity.

[0007] As an implementable manner, the microstructure includes a first microstructure, which is a groove formed from the light incident surface of the mounting structure toward the light emitting surface of the mounting structure, so that another part of the light emitted by the light source enters the mounting structure through the first microstructure and is emitted through the side wall surface of the mounting structure toward a side away from the light emitting area.

[0008] As an implementable manner, along the arrangement direction of the light sources, the length of the first microstructure is greater than or equal to the length of the light sources.

[0009] As an implementable manner, the number of the first microstructure is at least one. When the number of the first microstructure is multiple, the multiple first microstructures are arranged in sequence and spaced apart.

[0010] As an implementable method, the microstructure also includes a second microstructure, which is a pattern formed on the light-emitting surface of the mounting structure, so that another part of the light emitted by the light source enters the mounting structure through the first microstructure and is emitted toward a side away from the light-emitting area through the second microstructure.

[0011] As an practicable manner, the microstructure includes a third microstructure arranged on the light incident surface of the mounting structure and a fourth microstructure arranged adjacent to the third microstructure, the third microstructure being a protrusion protruding from the light incident surface of the mounting structure, and the fourth microstructure being a groove formed from the light incident surface of the mounting structure toward the light emitting surface of the mounting structure, so that another part of the light emitted by the light source is emitted to the fourth microstructure through the third microstructure, enters the mounting structure through the fourth microstructure, and then is emitted toward a side away from the light emitting area through the side wall surface of the mounting structure.

[0012] As an implementable manner, along the arrangement direction of the light sources, the lengths of the third microstructure and the fourth microstructure are equal, and the length of the third microstructure is greater than or equal to the length of the light sources.

[0013] As an implementable method, the microstructure also includes a fifth microstructure, which is a pattern formed on the fourth microstructure, so that the light emitted to the fourth microstructure enters the mounting structure through the fifth microstructure and is emitted through the light-emitting surface of the mounting structure toward a side away from the light-emitting area.

[0014] As an implementable manner, the light source is an LED.

[0015] According to a second aspect of the embodiments of the present application, a vehicle lamp is provided, comprising the above optical system. The optical system can reduce the influence of stray light on the lighting effect and improve the lighting uniformity.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] The optical system includes a light source, a light guide and a mounting structure. The mounting structure is arranged at the end of the light guide for mounting the light guide in the vehicle lamp. The light source is arranged on the side where the light incident surface of the mounting structure is located, so that a part of the light emitted by the light source is incident into the light guide through the light exit surface of the mounting structure and is emitted toward the light emitting area. The mounting structure is provided with a microstructure, so that another part of the light emitted by the light source that cannot enter the light guide through the mounting structure is emitted toward the side away from the light emitting area through the microstructure. The optical system provided by the present application can change the transmission path of the stray light emitted by the light source that originally did not enter the light guide after passing through the mounting structure and would form a bright spot in the light emitting area by adding a microstructure to the mounting structure, and shift the actual transmission direction of the stray light emitted by the light source that would originally form a bright spot in the light emitting area toward the side away from the light emitting area, thereby avoiding the part of the stray light from being projected into the light emitting area to form a bright spot. Compared with the prior art, the optical system provided by the present application can reduce stray light and improve lighting uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of an optical system provided in the first embodiment of the present application;

[0020] Figure 2 A light path diagram of the optical system provided in the first embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of an optical system provided in the second embodiment of the present application;

[0022] Figure 4 A light path diagram of an optical system provided in the second embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of an optical system provided in the third embodiment of the present application;

[0024] Figure 6 A light path diagram of an optical system provided in the third embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of an optical system provided in a fourth embodiment of the present application;

[0026] Figure 8 This is a light path diagram of the optical system provided in the fourth embodiment of the present application.

[0027] Icon: 100-optical system; 10-light source; 20-light guide; 30-mounting structure; 30a-light incident surface; 30b-side wall surface; 30c-light emitting surface; 31-first microstructure; 32-second microstructure; 33-third microstructure; 34-fourth microstructure; 35-fifth microstructure; 200-light emitting area. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Please refer to Figures 1 to 8 The embodiment of the present application provides an optical system 100, including a light source 10, a light guide 20 and a mounting structure 30. The mounting structure 30 is arranged at the end of the light guide 20 for mounting the light guide 20 in a vehicle lamp. The light source 10 is arranged on the side where the light incident surface 30a of the mounting structure 30 is located, so that a part of the light emitted by the light source 10 enters the light guide 20 through the light exit surface 30c of the mounting structure 30 and exits toward the light emitting area 200. The mounting structure 30 is provided with a microstructure, so that another part of the light emitted by the light source 10 that cannot enter the light guide 20 through the mounting structure 30 exits toward a side away from the light emitting area 200 through the microstructure. The optical system 100 can reduce the influence of stray light on the lighting effect and improve the lighting uniformity.

[0035] It should be noted that the optical system 100 includes a light source 10, a light guide 20 and a mounting structure 30. The mounting structure 30 is arranged at the end of the light guide 20 and fixes the light guide 20 in the vehicle lamp. The light source 10 is arranged corresponding to the mounting structure 30. The light emitted by the light source 10 can enter the light guide 20 through the mounting structure 30 and be projected to the light emitting area 200. The opposite sides of the mounting structure 30 are respectively the light incident surface 30a of the mounting structure 30 and the light emitting surface 30c of the mounting structure 30. When the light source 10, the light guide 20 and the mounting structure 30 are installed, the light source 10 should be installed corresponding to the light incident surface 30a of the mounting structure 30, and the light guide 20 should be installed and fixed on the light emitting surface 30c of the mounting structure 30; in other words, the light source 10, the mounting structure 30 and the light guide 20 are arranged in sequence along the light path direction, the side where the light source 10 is located is the light incident surface 30a of the mounting structure 30, and the side where the light guide 20 is located is the light emitting surface 30c of the mounting structure 30.

[0036] Regarding the connection method between the light guide 20 and the mounting structure 30, those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here. Figure 1 , Figure 3 , Figure 5 and Figure 7As shown, in some embodiments, the light guide 20 and the mounting structure 30 may be integrally formed. Of course, in other embodiments, the light guide 20 and the mounting structure 30 may be connected via a connector. In addition, the mounting structure 30 should be made of a transparent material to ensure that the mounting structure 30 is light-transmissive. The material selected for the mounting structure 30 may be the same as or different from the material selected for the light guide 20. For example, the high temperature resistance of the material selected for the mounting structure 30 needs to be better than that of the material selected for the light guide 20. This is because the mounting structure 30 is closer to the light source 10 than the light guide 20. Therefore, the mounting structure 30 needs to have better high temperature resistance to ensure that the mounting structure 30 will not be damaged by the heat generated by the operation of the light source 10.

[0037] It should also be noted that the above-mentioned light source 10 can be an LED, and the light guide 20 can directly call a light guide product in the prior art. Those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here. In addition, for example, the light guide 20 has two ends, and along the light path direction, the two ends are the head and tail of the light guide 20, respectively. The above-mentioned installation and fixing of the light guide 20 on the light emitting surface 30c of the mounting structure 30 refers to fixing the head of the light guide 20 on the light emitting surface 30c of the mounting structure 30. In this way, a part of the light emitted by the light source 10 can enter the mounting structure 30 through the light incident surface 30a of the mounting structure 30, and then enter the light guide 20 from the light emitting surface 30c of the mounting structure 30 through the head of the light guide 20, and then emit toward the preset light emitting area 200 under the light guiding action of the light guide 20, thereby realizing the lighting function of the vehicle.

[0038] On this basis, a microstructure is arranged on the mounting structure 30 so that another part of the light emitted by the light source 10 that cannot enter the light guide 20 through the mounting structure 30 is emitted through the microstructure toward the side away from the light emitting area 200. In other words, the optical system 100 provided in the present application can change the transmission path of the stray light emitted by the light source 10 that originally did not enter the light guide 20 after passing through the mounting structure 30 and would form a bright spot in the light emitting area 200 by adding a microstructure on the mounting structure 30, and shift the actual transmission direction of the stray light emitted by the light source 10 that would originally form a bright spot in the light emitting area 200 toward the side away from the light emitting area 200, thereby avoiding the part of the stray light from being projected onto the light emitting area 200 to form a bright spot. Compared with the prior art, the optical system 100 provided in the present application can reduce stray light and improve lighting uniformity.

[0039] For example, Figure 1 and Figure 2As shown, in some embodiments, the microstructure includes a first microstructure 31, and the first microstructure 31 is a groove formed from the light incident surface 30a of the mounting structure 30 toward the light emitting surface 30c of the mounting structure 30, so that another part of the light emitted by the light source 10 that cannot enter the light guide 20 through the mounting structure 30 enters the mounting structure 30 through the first microstructure 31, and is emitted through the side wall surface 30b of the mounting structure 30 toward the side away from the light emitting area 200.

[0040] It should be noted that the first microstructure 31 is a groove formed from the light incident surface 30a of the mounting structure 30 toward the light emitting surface 30c of the mounting structure 30. In the actual manufacturing process, by grooving the light incident surface 30a of the mounting structure 30, an air layer can be generated at the position of the first microstructure 31, so that the stray light emitted by the light source 10 that would originally form a bright spot in the light-emitting area 200 is refracted when it is emitted to the side of the first microstructure 31, thereby causing this part of the stray light to undergo a larger lateral displacement toward the side away from the light-emitting area 200, and then causing this part of the stray light to be emitted through the side wall surface 30b of the mounting structure 30 after entering the mounting structure 30, thereby effectively preventing the light emitted by the light source 10 from being projected onto the light-emitting area 200 to form a bright spot. Furthermore, since an air layer is introduced at the location of the first microstructure 31, another part of the light emitted by the light source 10 and irradiated on the light incident surface 30a of the mounting structure 30 cannot enter the light guide 20 through the mounting structure 30. When the light enters the air layer after refraction, it is more likely to be totally reflected because it is propagated from a light-dense medium to a light-sparse medium. This prevents the stray light emitted by the light source 10 that would originally form a bright spot in the light-emitting area 200 from being projected onto the light-emitting area 200 to form a bright spot, thereby improving the uniformity of lighting.

[0041] Among them, Figure 1 As shown, as an implementable manner, along the arrangement direction of the light source 10, the length of the first microstructure 31 is greater than or equal to the length of the light source 10, so that the action range of the first microstructure 31 can at least cover part of the light emitted by the light source 10 along its arrangement direction. Since the light emitted by the LED 10 is not parallel light but divergent light, therefore, under the premise of avoiding increasing the volume of the mounting structure 30, the longer the length of the first microstructure 31 is, the larger the action range of the first microstructure 31 is, and the more stray light emitted by the light source 10 that would originally form a bright spot in the light-emitting area 200 can be changed. The transmission path can be changed.

[0042] For example, Figure 3 and Figure 4 As shown, in some other embodiments, the number of the first microstructure 31 is at least one. When the number of the first microstructure 31 is multiple, the multiple first microstructures 31 are arranged in sequence and spaced apart.

[0043] It should be noted that one first microstructure 31 introduces one air layer, and multiple first microstructures 31 introduce multiple air layers. The optical path can be significantly increased by multiple first microstructures 31, thereby effectively increasing the amount of lateral displacement of stray light emitted by the light source 10 that would otherwise form a bright spot in the light-emitting area 200 toward the side away from the light-emitting area 200. When there are multiple first microstructures 31, multiple first microstructures 31 are arranged in sequence at intervals, and the thickness of the blocking wall formed between two adjacent first microstructures 31 should be reasonably selected and designed by those skilled in the art according to actual conditions, and no specific restrictions are made here. For example, under the premise of avoiding excessively increasing the volume of the mounting structure 30, the thicker the thickness of the blocking wall, the greater the increase in the optical path, thereby making the displacement of this part of the light greater.

[0044] For example, Figure 5 and Figure 6 As shown, in other embodiments, the microstructure also includes a second microstructure 32, which is a pattern formed on the light-emitting surface 30c of the mounting structure 30, so that another part of the light emitted by the light source 10 that cannot enter the light guide 20 through the mounting structure 30 enters the mounting structure 30 through the first microstructure 31, and is emitted toward the side away from the light-emitting area 200 through the second microstructure 32.

[0045] It should be noted that since the light emitted by LED 10 is not parallel light but divergent light, even if the first microstructure 31 is provided on the light incident surface 30a of the mounting structure 30, a small part of the light will not be able to irradiate the side of the first microstructure 31, and then will not be able to be emitted through the side wall surface 30b of the mounting structure 30. In order to solve the above problem, further, on the basis of the first microstructure 31 being provided on the light incident surface 30a of the mounting structure 30, a second microstructure 32 can be provided on the light emitting surface 30c of the mounting structure 30. The second microstructure 32 is a pattern formed on the light emitting surface 30c of the mounting structure 30. In this way, the small part of the light irradiated on the bottom of the first microstructure 31 can be emitted through the light emitting surface 30c of the mounting structure 30, and under the action of the second microstructure 32, the small part of the light can be diffused, thereby further improving the lighting uniformity.

[0046] For example, Figure 7 and Figure 8As shown, in other embodiments, the microstructure includes a third microstructure 33 arranged on the light incident surface 30a of the mounting structure 30 and a fourth microstructure 34 arranged adjacent to the third microstructure 33, the third microstructure 33 is a protrusion protruding from the light incident surface 30a of the mounting structure 30, and the fourth microstructure 34 is a groove formed from the light incident surface 30a of the mounting structure 30 toward the light emitting surface 30c of the mounting structure 30, so that another part of the light emitted by the light source 10 that cannot enter the light guide 20 through the mounting structure 30 is emitted to the fourth microstructure 34 through the third microstructure 33, enters the mounting structure 30 through the fourth microstructure 34, and then is emitted through the side wall surface 30b of the mounting structure 30 toward the side away from the light emitting area 200.

[0047] It should be noted that the third microstructure 33 should be as close to the light source 10 as possible so as to receive the large-angle light emitted by the light source 10. The fourth microstructure 34 is located on the side of the third microstructure 33 away from the light guide 20, and the fourth microstructure 34 should be arranged close to the third microstructure 33, so that a multi-layer medium can be formed by the third microstructure 33 and an air layer can be formed by the fourth microstructure 34, so as to refract the stray light emitted by the light source 10 that would originally form a bright spot in the light-emitting area 200, thereby causing the part of the stray light to undergo a large-angle lateral displacement toward the side away from the light-emitting area 200. Specifically, the large-angle stray light emitted by the light source 10 is emitted to the side of the third microstructure 33 and refracted twice, and then enters the air layer, so that the part of the stray light is emitted into the mounting structure 30 through the fourth microstructure 34, and then emitted toward the side away from the light-emitting area 200 through the side wall surface 30b of the mounting structure 30, thereby not generating a bright spot in the light-emitting area 200, and improving the lighting uniformity.

[0048] Among them, Figure 7 As shown, as an implementable manner, along the arrangement direction of the light source 10, the lengths of the third microstructure 33 and the fourth microstructure 34 are equal, and the length of the third microstructure 33 is greater than or equal to the length of the light source 10, so that the action range of the third microstructure 33 and the fourth microstructure 34 can at least cover part of the light emitted by the light source 10 along its arrangement direction. Since the light emitted by the LED 10 is not parallel light but divergent light, therefore, under the premise of avoiding increasing the volume of the mounting structure 30, the longer the lengths of the third microstructure 33 and the fourth microstructure 34 are, the larger the action range of the third microstructure 33 and the fourth microstructure 34 is, and the more stray light emitted by the light source 10 that would originally form a bright spot in the light-emitting area 200 can be changed to play the role of changing the transmission path.

[0049] For example, Figure 7 and Figure 8As shown, in other embodiments, the microstructure also includes a fifth microstructure 35, which is a pattern formed on the fourth microstructure 34, so that the light emitted to the fourth microstructure 34 enters the mounting structure 30 through the fifth microstructure 35, and is emitted through the light-emitting surface 30c of the mounting structure 30 toward the side away from the light-emitting area 200.

[0050] It should be noted that since the light emitted by LED 10 is not parallel light but divergent light, even if the third microstructure 33 and the fourth microstructure 34 are provided on the light incident surface 30a of the mounting structure 30, there will still be a small part of the light that cannot be irradiated on the side wall surface 30b of the mounting structure 30. In order to solve the above problem, further, on the basis of the third microstructure 33 and the fourth microstructure 34 being provided on the light incident surface 30a of the mounting structure 30, a fifth microstructure 35 can be provided on the light incident surface 30a of the mounting structure 30. The fifth microstructure 35 is a pattern formed on the fourth microstructure 34. In this way, the small part of the light originally irradiated on the light emitting surface 30c of the mounting structure 30 can be diffused by the fifth microstructure 35 and then emitted through the light emitting surface 30c of the mounting structure 30, thereby weakening the bright spot formed on the light-emitting area 200 and further improving the lighting uniformity.

[0051] The embodiment of the present application further provides a vehicle lamp, comprising the above-mentioned optical system 100. Since the structure and beneficial effects of the optical system 100 have been described in detail in the above-mentioned embodiment, they will not be described in detail here.

[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

Claims

1. An optical system, characterized in that: The invention comprises a light source, a light guide and a mounting structure, wherein the mounting structure is arranged at the end of the light guide for mounting the light guide in a vehicle lamp, and the light source is arranged correspondingly on the side where the light incident surface of the mounting structure is located, so that a part of the light emitted by the light source enters the light guide through the light emitting surface of the mounting structure and is emitted toward a light emitting area; and a microstructure is arranged on the mounting structure, so that another part of the light emitted by the light source that cannot enter the light guide through the mounting structure is emitted toward a side away from the light emitting area through the microstructure.

2. The optical system according to claim 1, characterized in that The microstructure includes a first microstructure, which is a groove formed from the light incident surface of the mounting structure toward the light emitting surface of the mounting structure, so that another part of the light emitted by the light source enters the mounting structure through the first microstructure and is emitted through the side wall surface of the mounting structure toward a side away from the light emitting area.

3. The optical system according to claim 2, characterized in that Along the arrangement direction of the light sources, the length of the first microstructure is greater than or equal to the length of the light sources.

4. The optical system according to claim 2, characterized in that The number of the first microstructure is at least one. When the number of the first microstructure is multiple, the multiple first microstructures are arranged in sequence at intervals.

5. The optical system according to claim 2, characterized in that The microstructure also includes a second microstructure, which is a pattern formed on the light-emitting surface of the mounting structure, so that another part of the light emitted by the light source enters the mounting structure through the first microstructure and is emitted toward a side away from the light-emitting area through the second microstructure.

6. The optical system according to claim 1, characterized in that The microstructure includes a third microstructure arranged on the light incident surface of the mounting structure and a fourth microstructure arranged adjacent to the third microstructure, wherein the third microstructure is a protrusion protruding from the light incident surface of the mounting structure, and the fourth microstructure is a groove formed from the light incident surface of the mounting structure toward the light emitting surface of the mounting structure, so that another part of the light emitted by the light source is emitted to the fourth microstructure through the third microstructure, enters the mounting structure through the fourth microstructure, and then is emitted toward a side away from the light emitting area through the side wall surface of the mounting structure.

7. The optical system according to claim 6, characterized in that Along the arrangement direction of the light sources, the lengths of the third microstructure and the fourth microstructure are equal, and the length of the third microstructure is greater than or equal to the length of the light sources.

8. The optical system according to claim 6, characterized in that The microstructure also includes a fifth microstructure, which is a pattern formed on the fourth microstructure so that the light emitted to the fourth microstructure enters the mounting structure through the fifth microstructure and is emitted through the light-emitting surface of the mounting structure toward a side away from the light-emitting area.

9. The optical system according to any one of claims 1 to 8, characterized in that: The light source is LED.

10. A vehicle lamp, characterized in that: An optical system comprising any one of claims 1 to 9.

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