Optical assembly, optical system and vehicle

Abstract

An optical assembly, an optical system and a vehicle. The optical assembly (3) comprises a first interface (31) and a second interface (32), which are arranged in sequence in a front-rear direction, wherein the first interface (31) is provided with several first interface unit faces (311), and the normal directions of adjacent first interface unit faces (311) are inconsistent; the second interface (32) is provided with several second interface unit faces (321), and the normal directions of adjacent second interface unit faces (321) are inconsistent; and on a projection plane perpendicular to the front-rear direction, each first interface unit face (311) partially overlaps with a second interface unit face (321) in a corresponding region, and the normal directions thereof are inconsistent.

Description

Optical assembly, optical system and vehicle

[0001] Cross-reference to Related Applications

[0002] This application claims the benefit of Chinese Patent Application No. 202421923725.3, filed on August 8, 2024, the contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicle lamps, in particular to an optical assembly, and further relates to an optical system and a vehicle. BACKGROUND

[0004] A vehicle lamp is a device used for lighting, indicating signals or providing decoration on a vehicle. With the development of the automotive industry, people have higher requirements for the decorative nature of vehicle lamps.

[0005] In addition to the overall appearance design of the vehicle lamp, special pattern designs are now made on the outer surface of some optical elements in the vehicle lamp (i.e., the surface of the optical element that can be observed) or the surface of some decorative parts, etc., to improve the visual perception of the car light and the overall car body.

[0006] However, the pattern design of the optical element or the decorative part in the prior art has a single optical path, resulting in a dull visual effect. SUMMARY

[0007] The technical problem to be solved by the present application is to provide an optical assembly, an optical system and a vehicle to solve the problem of dull visual effect of the optical element.

[0008] To solve the above technical problem, the first aspect of the present application provides an optical assembly, which comprises a first interface and a second interface arranged in sequence along the front-rear direction; the first interface is provided with a plurality of first interface unit surfaces, the normal directions of adjacent first interface unit surfaces are inconsistent; the second interface is provided with a plurality of second interface unit surfaces, the normal directions of adjacent second interface unit surfaces are inconsistent.

[0009] In the projection plane perpendicular to the front-rear direction, the first interface unit surface and the corresponding area of the second interface unit surface partially overlap, and the normal directions of the two are inconsistent.

[0010] In some embodiments, the optical assembly comprises at least one first light returning unit, the first light returning unit comprises the first interface unit surface and at least two second interface unit surfaces partially overlapping with the first interface unit surface in a projection plane perpendicular to the front-rear direction, in the first light returning unit, at least part of the light rays entering the optical assembly from the first interface unit surface exit from the first interface unit surface after being reflected by the at least two second interface unit surfaces.

[0011] In some embodiments, in the second light returning unit, at least part of the light rays entering the optical assembly from the first light transmitting unit exit from the second light transmitting unit after being reflected by the first reflecting unit and the second reflecting unit in sequence, forming a virtual image of the first light transmitting unit, the virtual image of the first light transmitting unit is partially overlapped with the at least two first interface unit surfaces and the at least two second interface unit surfaces in a projection plane perpendicular to the front-rear direction, the virtual image of the first light transmitting unit is divided into a plurality of virtual image regions by the at least two first interface unit surfaces and the at least two second interface unit surfaces, and a plurality of the virtual image regions form bright spots in different viewing angle ranges, respectively.

[0012] In some embodiments, the first light transmitting unit and the second light transmitting unit are obliquely intersected to form a first fold line, the first reflecting unit and the second reflecting unit are intersected to form a second fold line, the first fold line and the second fold line are not coplanar, and the first fold line and the second fold line intersect in a projection plane perpendicular to the front-rear direction.

[0013] In some embodiments, the first light transmitting unit and the second light transmitting unit are adjacent to have a first reference bottom surface opposite to the first fold line, and the included angle between the first interface unit surface in the first light transmitting unit and the first reference bottom surface and the included angle between the first interface unit surface in the second light transmitting unit and the first reference bottom surface are both greater than 1° and less than or equal to 73°.

[0014] In some embodiments, the included angle between the first light transmitting unit of different second light returning units and the first reference bottom surface is at least partially different, and the included angle between the second light transmitting unit of different second light returning units and the first reference bottom surface is at least partially different.

[0015] In some embodiments, the size of the included angle between the first light transmitting unit and the first reference bottom surface and / or the included angle between the second light transmitting unit and the first reference bottom surface decreases with the increase of the refractive index of the molding material of the optical assembly.

[0016] In some embodiments, the first and second reflective units are adjacent to have a second reference bottom surface opposite to the second fold line, and the included angle between the second interface unit surface in the first reflective unit and the second reference bottom surface and the included angle between the second interface unit surface in the second reflective unit and the second reference bottom surface are both greater than or equal to 29° and less than or equal to 62°.

[0017] In some embodiments, the first and second light-transmitting units are obliquely intersected to form a first fold line, the first and second reflective units are intersected to form a second fold line, the first fold line and the second fold line are not coplanar, and the first fold line and the second fold line intersect on a projection plane perpendicular to the front-back direction.

[0018] In some embodiments, the first and second light-transmitting units are adjacent to have a first reference bottom surface opposite to the first fold line, and the included angle between the first interface unit surface in the first light-transmitting unit and the first reference bottom surface and the included angle between the first interface unit surface in the second light-transmitting unit and the first reference bottom surface are both greater than 1° and less than or equal to 73°.

[0019] In some embodiments, the included angles between the first light-transmitting units of different second light-return units and the first reference bottom surface are at least partially different; and the included angles between the second light-transmitting units of different second light-return units and the first reference bottom surface are at least partially different.

[0020] In some embodiments, the included angle between the first light-transmitting unit and the first reference bottom surface and / or the included angle between the second light-transmitting unit and the first reference bottom surface decreases as the refractive index of the molding material of the optical assembly increases.

[0021] In some embodiments, the first and second reflective units are adjacent to have a second reference bottom surface opposite to the second fold line, and the included angle between the second interface unit surface in the first reflective unit and the second reference bottom surface and the included angle between the second interface unit surface in the second reflective unit and the second reference bottom surface are both greater than or equal to 29° and less than or equal to 62°.

[0022] In some embodiments, the first and second light-transmitting units have a first reference bottom surface opposite to the first fold line, the first and second reflective units have a second reference bottom surface opposite to the second fold line, and the first reference bottom surface and the second reference bottom surface are parallel.

[0023] In some embodiments, the first reflective unit and the second reflective unit are total reflection surfaces.

[0024] In some embodiments, the included angle between the first fold ridge line and the second fold ridge line is 45° to 90°.

[0025] In some embodiments, the first reflective unit comprises two second interface unit surfaces, which are a first reflective unit first surface and a first reflective unit second surface, respectively, sequentially distributed in a direction away from the first light-transmitting unit; the second reflective unit comprises two second interface unit surfaces, which are a second reflective unit first surface and a second reflective unit second surface, respectively, sequentially distributed in a direction away from the second light-transmitting unit.

[0026] In some embodiments, the included angle between the first reflective unit first surface and the second reference bottom surface is greater than the included angle between the first reflective unit second surface and the second reference bottom surface.

[0027] The included angle between the second reflective unit first surface and the second reference bottom surface is greater than the included angle between the second reflective unit second surface and the second reference bottom surface.

[0028] In some embodiments, part of the first interface unit surfaces are polygonal surfaces, and part of the first interface unit surfaces are triangular surfaces.

[0029] In some embodiments, the number of the first interface unit surfaces in triangular surfaces accounts for at least 98% of the total number of the first interface unit surfaces; or,

[0030] The projection area of the first interface unit surface in triangular surfaces in the projection plane perpendicular to the front-rear direction accounts for at least 98% of the projection area of the first interface in the projection plane perpendicular to the front-rear direction.

[0031] In some embodiments, the side length of the second interface unit surface is greater than or equal to 3 mm and less than or equal to 30 mm, and the second interface unit surface is a plane or an approximately plane.

[0032] In some embodiments, part of the second interface unit surfaces are polygonal surfaces, and part of the second interface unit surfaces are triangular surfaces.

[0033] In some embodiments, the number of the second interface unit surfaces in triangular surfaces accounts for at least 98% of the total number of the second interface unit surfaces; or,

[0034] The projection area of the second interface unit surface in triangular surfaces in the projection plane perpendicular to the front-rear direction accounts for at least 98% of the projection area of the second interface in the projection plane perpendicular to the front-rear direction.

[0035] In some embodiments, the thickness of the optical assembly is greater than or equal to 1.5 mm and less than or equal to 8 mm.

[0036] In some embodiments, the length of the first interface surface is greater than or equal to 3 mm and less than or equal to 30 mm, and the first interface surface is a plane or an approximately plane.

[0037] In some embodiments, the optical assembly comprises a light guide element, and the first interface and the second interface are two optical surfaces of the light guide element.

[0038] In some embodiments, the optical assembly comprises a light guide element and a reflective element, the first interface is an optical surface of the light guide element, and the second interface is a reflective surface of the reflective element.

[0039] In some embodiments, the plurality of second interface surfaces of the reflective element form a plurality of rows of the reflective surfaces, and the reflective surfaces of adjacent two rows form a step structure, and a groove recessed away from the optical assembly is formed on a ridge of the step structure protruding towards the optical assembly.

[0040] The second aspect of the present application provides an optical system comprising a light source and an optical assembly as described above.

[0041] The third aspect of the present application provides a vehicle comprising an optical system as described above.

[0042] Through the above-mentioned solutions, the present application has the following beneficial effects:

[0043] The optical assembly of the present application comprises a plurality of first interface surfaces arranged on the first interface and a plurality of second interface surfaces arranged on the second interface, so that the light can be deflected in different directions when the light enters or exits the optical assembly from the first interface surfaces or when the light is emitted from the second interface surfaces to the first interface surfaces, thereby making the optical path of the light in the optical assembly more complex, forming three-dimensional refraction and reflection, and further making the sparkling effect of the bright spot formed on the first interface more dynamic.

[0044] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation of the present application. In the drawings:

[0046] Figure 1 is a front view of the optical components of this application;

[0047] Figure 2 is a rear view of the optical components of this application;

[0048] Figure 3 is a front view of the reflective element in the optical assembly of this application;

[0049] Figure 4 is a cross-sectional view of the optical component of this application after longitudinal sectioning;

[0050] Figure 5 is a schematic diagram showing the correct positional relationship between the first interface unit surface and the second interface unit surface in the optical component of this application on a projection plane perpendicular to the front-back direction.

[0051] Figure 6 is a schematic diagram of the incorrect positional relationship between the first interface unit surface and the second interface unit surface in the optical component of this application on a projection plane perpendicular to the front-back direction.

[0052] Figure 7 is a schematic diagram of the propagation path of the light in the first optical return unit in the optical component of this application;

[0053] Figure 8 is a three-dimensional structural diagram of the optical component of this application;

[0054] Figure 9 is a top view of the optical components of this application;

[0055] Figure 10 is a bottom view of the optical component of this application;

[0056] Figure 11 is a partial three-dimensional structural schematic diagram of the optical component of this application;

[0057] Figure 12 is a schematic diagram of the propagation path of the light in the second optical reflection unit in the optical component of this application;

[0058] Figure 13 is a schematic diagram of the propagation path of light in the X-direction view of the optical component of this application, wherein the part of the light rays from the first reflection unit to the second reflection unit is omitted;

[0059] Figure 14 is a schematic diagram of the propagation path of light in the optical component of this application from the Y-direction viewpoint;

[0060] Figure 15A is a schematic diagram of the surface finish of the optical component of this application;

[0061] Figure 15B is a schematic diagram of the virtual image of the finish of the optical component of this application;

[0062] Figure 16 is a schematic diagram of the brilliant light effect of an embodiment of the optical component of this application;

[0063] Figure 17 is a schematic diagram of another embodiment of the optical component of this application;

[0064] Figure 18 is a schematic diagram of the brilliant light effect of another embodiment of the optical component of this application.

[0065] Explanation of reference signs 1, light source; 2, reflecting element; 21, reflecting unit face; 22, groove; 3, optical assembly; 31, first interface; 311, first interface unit face; 311', A unit face; 311", B unit face; 311'", C unit face; 3111, first light-transmitting unit; 3112, second light-transmitting unit; 312, first fold line; 32, second interface; 321, second interface unit face; 321', D unit face; 321", E unit face; 3211, first reflecting unit; 32111, first unit face of first reflecting unit; 32112, second unit face of first reflecting unit; 3212, second reflecting unit; 32121, first unit face of second reflecting unit; 32122, second unit face of second reflecting unit; 322, second fold line; 30, bright spot. DETAILED DESCRIPTION

[0066] The specific embodiments of the present application are described below in detail with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only used to explain and illustrate the present application, and the protection scope of the present application is not limited to the specific embodiments described below.

[0067] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "form", "provided with", "set", "connected" and the like should be understood in a broad sense, for example, the connection can be direct connection or indirect connection through intermediate medium, can be fixed connection or detachable connection, or integral connection; can be direct connection or indirect connection through intermediate connecting member, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0068] The first aspect of the present application provides an optical assembly as shown in FIGS. 1-7, which specifically includes a first interface 31 and a second interface 32 arranged in sequence along the front-rear direction, the first interface 31 is provided with a plurality of first interface unit surfaces 311, the normal directions of adjacent first interface unit surfaces 311 are different; the second interface 32 is provided with a plurality of second interface unit surfaces 321, the normal directions of adjacent second interface unit surfaces 321 are different; on the projection plane perpendicular to the front-rear direction, the first interface unit surface 311 partially overlaps with the corresponding region of the second interface unit surface 321, and the normal directions of the two are different. As shown in FIGS. 5 and 6, the partial overlap means that in the front-rear direction, the first interface unit surface 311 and the second interface unit surface 321 intersect at least at two edges, and does not include the relationship of containing or complete overlap. Specifically, the front-rear direction described in the present application is the main light output direction of the optical assembly 3. When the optical assembly 3 is installed as an optical element of a vehicle lamp in the front combination lamp or the rear combination lamp of the vehicle, the front combination lamp usually needs to output light to the front side of the vehicle, and the rear combination lamp needs to output light to the rear side of the vehicle, so the front-rear direction is the front-rear direction of the vehicle; when the optical assembly 3 is installed as an optical element of a vehicle lamp in the side marker lamp on the side of the vehicle, since the side marker lamp needs to output light laterally, the front-rear direction is the left-right direction of the vehicle; when the optical assembly 3 is installed as an optical element of a vehicle lamp in the interior lamp, the interior lamp has different light output directions, so the front-rear direction is the light output direction of the interior lamp.

[0069] Based on the above design, when the light emitted by the light source is incident on the second interface 32 of the optical assembly 3, since there are a plurality of second interface unit surfaces 321 with different normal directions on the second interface 32, after passing through the second interface unit surface 321, the light will be emitted in various directions towards the first interface 31, and there are a plurality of first interface unit surfaces 311 with different normal directions on the first interface 31, so that the light will eventually be emitted from each first interface unit surface 311, making the optical path more complex, so that when observing the first interface 31 of the optical assembly, light can be seen from different observation angles, so as to form a sparkling light effect like a crystal gemstone when the light source is turned on, thereby improving the luxury of the vehicle lamp using the optical assembly 3.

[0070] In addition, since the corresponding first interface unit surface 311 and the second interface unit surface 321 partially overlap on the projection plane perpendicular to the front-rear direction, and the normal directions of the two are different, when the light passes through the second interface unit surface 321 and is emitted from the second interface unit surface 321, it can be incident on at least one first interface unit surface 311, so as to divide the light into multiple beams and emit them in different directions from the first interface 31, thereby improving the sparkling quality of the light and making the vehicle lamp more luxurious.

[0071] Similarly, when the ambient light is incident on the first interface 31 of the optical assembly 3, a sparkling light effect like the crystal gemstone texture can also be formed, thereby improving the luxury of the vehicle lamp using the optical assembly 3.

[0072] Further, the optical assembly 3 comprises at least one first light returning unit. The first light returning unit comprises the first interface unit surface 311 and at least two second interface unit surfaces 321 partially overlapping with the first interface unit surface 311 in the projection plane perpendicular to the front-rear direction.

[0073] In the first light returning unit, at least part of the light incident on one of the second interface unit surfaces 321 from the first interface unit surface 311 is reflected by the second interface unit surface 321 and then reflected by the other second interface unit surface 321 to the first interface unit surface 311 to be emitted, so that the sparkling effect can be formed by the ambient light without lighting the light source.

[0074] Based on the above arrangement, as shown in FIG. 7, the optical assembly 3 is specifically arranged such that a certain first interface unit surface 311 is an A surface 311', the upper and lower first interface unit surfaces 311 adjacent to the A surface 311' are respectively denoted as B surface 311" and C surface 311'", and the two second interface unit surfaces 321 corresponding to the A surface 311' in the projection plane perpendicular to the front-rear direction are respectively denoted as D surface 321' and E surface 321". Among them, the first light returning unit comprises the A surface 311', the D surface 321' and the E surface 321". In this embodiment, the included angle between the D surface 321' and the B surface 311" can be set to be greater than or equal to 70° and less than or equal to 90°, the included angle between the E surface 321" and the C surface 311'" can be set to be greater than or equal to 70° and less than or equal to 90°, and further preferably, the included angle between the D surface 321' and the A surface 311' and the included angle between the E surface 321" and the A surface 311' are set to be greater than or equal to 40° and less than or equal to 50°. The specific angles are determined according to the refractive index and reflectivity of the material for manufacturing the optical assembly 3, so that when the ambient light is incident on the D surface 321' from the A surface 311', total reflection occurs on the D surface 321' to be incident on the E surface 321", and then total reflection occurs on the E surface 321" to be incident on the A surface 311' and emitted from the A surface 311'.

[0075] In addition, the optical assembly can comprise at least one second light returning unit, which comprises: a first light transmitting unit 3111, a second light transmitting unit 3112, a first reflecting unit 3211 and a second reflecting unit 3212. The first light transmitting unit 3111 and the second light transmitting unit 3112 respectively comprise at least one first interface surface 311. The first reflecting unit 3211 and the second reflecting unit 3212 respectively comprise at least one second interface surface 321.

[0076] In the second light returning unit, at least part of the light rays entering the optical assembly 3 from the first light transmitting unit 3111 are reflected by the first reflecting unit 3211 and the second reflecting unit 3212 in turn and then exit from the second light transmitting unit 3112, so that the ambient light can also be used to form the sparkling effect when the light source is not turned on, and the optical path of the light rays in the optical assembly 3 is more complex, so that a more dynamic sparkling effect can be formed.

[0077] Specifically, as shown in FIGS. 8 to 18, in the second light returning unit, at least part of the light rays entering the optical assembly 3 from the first light transmitting unit 3111 are reflected by the first reflecting unit 3211 and the second reflecting unit 3212 in turn and then exit from the second light transmitting unit 3112, forming a virtual image 3111' of the first light transmitting unit 3111. Since the light rays are reflected twice, the virtual image 3111' of the first light transmitting unit 3111 and the first light transmitting unit 3111 are mirror images of each other in the projection plane perpendicular to the front-rear direction. Similarly, when the second light transmitting unit 3112 also forms a virtual image 3112', the virtual image 3112' and the second light transmitting unit 3112 are mirror images of each other.

[0078] The virtual image of the first light-transmitting unit 3111 partially overlaps with the at least two first interface unit surfaces 311 and the at least two second interface unit surfaces 321 on the projection plane perpendicular to the front-rear direction. According to the angle settings of the first light-transmitting unit 3111, the second light-transmitting unit 3112, the first reflecting unit 3211, and the second reflecting unit 3212, the at least two first interface unit surfaces 311, which partially overlap with the virtual image of the first light-transmitting unit 3111 on the projection plane perpendicular to the front-rear direction, can be the first interface unit surfaces 311 in the first light-transmitting unit 3111 and the second light-transmitting unit 3112. If, due to the aforementioned angle settings, the virtual image of the first light-transmitting unit 3111 is offset from the first light-transmitting unit 3111 and the second light-transmitting unit 3112 by at least one light-transmitting unit, the at least two first interface unit surfaces 311, which partially overlap with the virtual image of the first light-transmitting unit 3111 on the projection plane perpendicular to the front-rear direction, can also be the first interface unit surfaces 311 outside the first light-transmitting unit 3111 and the second light-transmitting unit 3112. Similarly, the at least two second interface unit surfaces 321, which partially overlap with the virtual image of the first light-transmitting unit 3111 on the projection plane perpendicular to the front-rear direction, can include the second interface unit surfaces 321 in the first reflecting unit 3211 and the second reflecting unit 3212, or can be the second interface unit surfaces 321 outside the first reflecting unit 3211 and the second reflecting unit 3212.

[0079] On the projection plane perpendicular to the front-rear direction, the virtual image of the first light-transmitting unit 3111 is divided into a plurality of virtual image regions by the at least two first interface unit surfaces 311 and the at least two second interface unit surfaces 321, and the plurality of virtual image regions form bright spots in different viewing angle ranges, so that different sparkling light effects of the vehicle lamp can be observed at different viewing angles, thereby improving the quality of the vehicle lamp. Further, different bright spots can also be formed by environmental light incident from different directions in the same viewing angle range.

[0080] For example, as shown in FIG. 16, in some specific embodiments, light rays enter the optical assembly from the first light-transmitting unit 3111, are reflected by the reflecting surface, and then exit from the second light-transmitting unit 3112, forming a virtual image of the first light-transmitting unit 3111. The virtual image of the first light-transmitting unit is shown as a grid line region in FIG. 16 (which is a mirror image of the first light-transmitting unit 3111). In the viewing angle range shown in FIG. 16, on the projection plane perpendicular to the front-rear direction, the virtual image of the first light-transmitting unit 3111 and the virtual image region in which the first light-transmitting unit 3111 and the first reflecting unit 3211 overlap form a bright spot 30.

[0081] In optional embodiments, the first light-transmitting unit 3111 and the second light-transmitting unit 3112 are obliquely intersected to form a first fold line 312, and the first reflecting unit 3211 and the second reflecting unit 3212 are intersected to form a second fold line 322. The first fold line 312 and the second fold line 322 are not coplanar, and the first fold line 312 and the second fold line 322 intersect on a projection plane perpendicular to the front-rear direction, so that at least part of the light rays, after being refracted by the first light-transmitting unit 3111, are reflected by the first reflecting unit 3211 towards the second reflecting unit 3212, and then are emitted from the second light-transmitting unit 3112.

[0082] Thus, the light rays can produce a refraction deflected along the extension direction of the second fold line 322 when entering or exiting the optical assembly 3 from the first interface unit face 311, and since at least part of the light rays can produce a refraction deflected along the extension direction of the second fold line 322 when entering the optical assembly 3 from the first interface unit face 311, the light rays can also be deflected along the extension direction of the second fold line 322 during the process of being reflected from the first reflecting unit 3211 to the second reflecting unit 3212, so that the light rays can enter the optical assembly 3 from the first light-transmitting unit 3111 including at least one first interface unit face 311, be refracted by the first light-transmitting unit 3111, be reflected by the first reflecting unit 3211 towards the second reflecting unit 3212, and then be emitted from the second light-transmitting unit 3112 including at least one first interface unit face 311 to form a first light-transmitting unit 3111 virtual image offset along the extension direction of the second fold line 322 compared to the first light-transmitting unit 3111, so as to form a three-dimensional refraction and reflection of the light rays in the optical assembly 3, and the optical path is more three-dimensional and complex, so that the sparkling effect of the bright spots formed on the first interface 31 is more dynamic.

[0083] In some specific embodiments, as shown in FIG. 11, the first light-transmitting unit 3111 and the second light-transmitting unit 3112 are adjacent to have a first reference bottom surface (denoted as F) opposite to the first fold line 312, and the included angle between the first interface unit face 311 in the first light-transmitting unit 3111 and the first reference bottom surface and the included angle between the first interface unit face 311 in the second light-transmitting unit 3112 and the first reference bottom surface are both greater than 1° and less than or equal to 73°, so as to ensure that the light rays have sufficient deflection in the direction along the second fold line 322, thereby ensuring that at least part of the light rays entering from the first light-transmitting unit 3111 can be emitted from the second light-transmitting unit 3112.

[0084] Further, the included angle between the first light-transmitting unit 3111 in different second light-reflecting units and the first reference bottom surface is at least partially different; the included angle between the second light-transmitting unit 3112 in different second light-reflecting units and the first reference bottom surface is at least partially different, so that different light-emitting directions can be generated on the first interface 31 of different second light-reflecting units, and the shape of the formed bright spot is more abundant.

[0085] Further, the included angle between the first light-transmitting unit 3111 in different second light-reflecting units and the first reference bottom surface is at least partially different; the included angle between the second light-transmitting unit 3112 in different second light-reflecting units and the first reference bottom surface is at least partially different, so that different light-emitting directions can be generated on the first interface 31 of different second light-reflecting units, and the shape of the formed bright spot is more abundant.

[0086] Table 1

[0087] In some specific embodiments, as shown in FIG. 11, the first reflecting unit 3211 and the second reflecting unit 3212 are adjacent to have a second reference bottom surface (denoted as G) opposite to the second fold line 322, and the included angle between the second interface unit surface 321 in the first reflecting unit 3211 and the second reference bottom surface and the included angle between the second interface unit surface 321 in the second reflecting unit 3212 and the second reference bottom surface are both greater than or equal to 29° and less than or equal to 62°, so as to ensure that the first reflecting unit 3211 and the second reflecting unit 3212 form a total reflection surface, as shown in FIGS. 12 to 14, so that the light rays emitted from the first interface 31 to the first reflecting unit 3211 and the second reflecting unit 3212 can be reflected by the two. The first reflecting unit 3211 and the second reflecting unit 3212 are arranged as a total reflection surface, so that the optical assembly 3 can not only rely on the external natural light rays entering from the first interface 31 to generate a dazzling light effect, so as to achieve the role of decoration, but also can emit light rays into the optical assembly 3 from the rear of the optical assembly 3, that is, at the second interface 32, by the light source 1 of the vehicle lamp itself, so as to form a dazzling light effect at the first interface 31, so as to play a role of decoration.

[0088] Therefore, the angle between the first reflecting unit 3211 and the reference light-out surface and the angle between the second reflecting unit 3212 and the reference light-out surface need to be specially defined to ensure that at least part of the light can be totally reflected when being incident on the first reflecting unit 3211 and the second reflecting unit 3212. Since the greater the difference between the refractive indexes on both sides of the interface, the smaller the critical angle of total reflection, in order to ensure that at least part of the light can be totally reflected by the first reflecting unit 3211 and the second reflecting unit 3212, the angle between the first reflecting unit 3211 and the second reference bottom surface and the angle between the second reflecting unit 3212 and the second reference bottom surface need to be maintained at an angle that can cause the first reflecting unit 3211 and the second reflecting unit 3212 to be totally reflected. Specifically, as shown in Table 1, let the angle between the first reflecting unit 3211 and the second reflecting unit 3212 and the second reference bottom surface be β, when the material of the optical assembly 3 is PC (polycarbonate), the refractive index thereof is 1.48-1.50, and the angle of the angle β is 32°-53°; when the material of the optical assembly 3 is PMMA (polymethyl methacrylate), the refractive index thereof is 1.57-1.62, and the angle of the angle β is 29°-57°; and when the material of the optical assembly 3 is glass, the refractive index thereof is 1.47-1.70, and the angle of the angle β is 36°-62°.

[0089] It should be noted that the first light-transmitting unit 3111 and the second light-transmitting unit 3112 have a first reference bottom surface opposite to the first fold line 312, the first reflecting unit 3211 and the second reflecting unit 3212 have a second reference bottom surface opposite to the second fold line 322, the first reference bottom surface and the second reference bottom surface can be parallel to each other, and in the preferred embodiment, perpendicular to the light-out direction as shown in FIG. 11, or the angle between the light-out direction as shown in FIG. 11 is close to 90°.

[0090] In some specific embodiments, as shown in FIG. 11 and FIG. 15 (FIG. 15A and FIG. 15B), the angle between the first fold line 312 and the second fold line 322 is 45°-90°, that is, the first light-transmitting unit 3111 and the second light-transmitting unit 3112 can form a parallelogram. Since the first light-transmitting unit 3111 forms a virtual image 3111’ of the first light-transmitting unit 3111 through twice reflection, the virtual image 3111’ is divided into a plurality of virtual image regions by the first light-transmitting unit 3111, the second light-transmitting unit 3112, the first reflecting unit 3211 and the second reflecting unit 3212. Since the virtual image regions are divided to form a trapezoid or a triangle and the like, and have a certain acute angle. Therefore, the bright spot presented based on different observation angles can be a trapezoid or a triangle and the like, so that the bright spot is more sharp in visual perception, and the sparkling effect is more prominent.

[0091] In some embodiments, as shown in FIG. 17, the first reflecting unit 3211 includes two second interface unit surfaces 321, i.e., a first reflecting unit first surface 32111 and a first reflecting unit second surface 32112, which are arranged in sequence along a direction away from the first light-transmitting unit 3111, and the second reflecting unit 3212 includes two second interface unit surfaces 321, i.e., a second reflecting unit first surface 32121 and a second reflecting unit second surface 32122, which are arranged in sequence along a direction away from the second light-transmitting unit 3112.

[0092] The included angle between the first reflecting unit first surface 32111 and the second reference bottom surface and the included angle between the first reflecting unit second surface 32112 and the second reference bottom surface are both greater than or equal to 29° and less than or equal to 62°. The included angle between the first reflecting unit first surface 32111 and the second reference bottom surface is greater than the included angle between the first reflecting unit second surface 32112 and the second reference bottom surface. The included angle between the second reflecting unit first surface 32121 and the second reference bottom surface and the included angle between the second reflecting unit second surface 32122 and the second reference bottom surface are both greater than or equal to 29° and less than or equal to 62°. The included angle between the second reflecting unit first surface 32121 and the second reference bottom surface is greater than the included angle between the second reflecting unit second surface 32122 and the second reference bottom surface.

[0093] Based on the above structural design, as shown in FIG. 18, after the light rays enter the optical assembly 3 from the first light-transmitting unit 3111, are reflected by the two reflecting units, and exit from the second light-transmitting unit 3112, a virtual image of the first light-transmitting unit 3111 is formed. In the projection plane perpendicular to the front-rear direction, the part of the virtual image of the first light-transmitting unit 3111 that coincides with the second reflecting unit second surface 32122 (first virtual image area) forms a first bright spot, which is a triangle, and the part of the virtual image of the first light-transmitting unit 3111 that coincides with the second light-transmitting unit 3112 and the first reflecting unit second surface 32112 (second virtual image area) forms a second bright spot, which is a trapezoid. According to the angle settings of the first light-transmitting unit 3111, the second light-transmitting unit 3112, the first reflecting unit 3211, and the second reflecting unit 3212, the first virtual image area and the second virtual image area can form bright spots in a partially overlapping view angle range or in a non-overlapping view angle range. Further, different environmental light incident in different directions can also form different bright spots in the same view angle range.

[0094] The designs of the first unit surface 32111, the second unit surface 32112, the third unit surface 32121 and the fourth unit surface 32122 of the first reflection unit 3211 and the second reflection unit 3212 can increase the number of reflection paths of the light, so that more bright spots with more complex shapes can be formed on the first light-transmitting unit 3111 and the second light-transmitting unit 3112, so that the sparkling light effect is more dynamic. Of course, it can be understood that the number of second interface unit surfaces 321 included in the first reflection unit 3211 and the second reflection unit 3212 is not limited to two, and more can be set to obtain a more dynamic sparkling light effect. The setting of the plurality of second interface unit surfaces 321 included in the first reflection unit 3211 and the second reflection unit 3212 can also follow the rule that the smaller the included angle between the second interface unit surface 321 and the second reference bottom surface, the closer to the second fold line 322. In addition, due to the design of the first unit surface 32111, the second unit surface 32112, the third unit surface 32121 and the fourth unit surface 32122, the surface of the optical assembly 3 does not need to be set with too many light-transmitting surfaces to generate more bright spots, so that the design difficulty of the surface of the optical assembly 3 can be simplified, and the manufacturing difficulty of the mold for injection molding of the optical assembly 3 is also reduced, thereby reducing the production cost of the optical assembly 3.

[0095] In a specific implementation of the present application, as shown in FIGS. 11-18, the second light reflection unit of the optical assembly of the present application includes a first light-transmitting unit 3111 and a second light-transmitting unit 3112, the first light-transmitting unit 3111 and the second light-transmitting unit 3112 respectively include at least one first interface unit surface 311; and a first reflection unit 3211 and a second reflection unit 3212, the first reflection unit 3211 and the second reflection unit 3212 respectively include at least one second interface unit surface 321, the first light-transmitting unit 3111 and the second light-transmitting unit 3112 are obliquely intersected to form a first fold line 312, the first reflection unit 3211 and the second reflection unit 3212 are intersected to form a second fold line 322, the first fold line 312 and the second fold line 322 are not coplanar, and the first fold line 312 and the second fold line 322 form an included angle of 60°. The optical assembly 3 is made of PMMA material, the included angle between the first light-transmitting unit 3111 and the first reference bottom surface and the included angle between the second light-transmitting unit 3112 and the first reference bottom surface are both 5°, and the included angle between the first reflection unit 3211 and the second reference bottom surface and the included angle between the second reflection unit 3212 and the second reference bottom surface are both 60°.

[0096] Based on the above structure, taking the example that light is emitted from the first light-transmitting unit 3111 and emitted from the second light-transmitting unit 3112, the optical path of at least part of the light in the optical assembly 3 is shown in FIGS. 12 to 14. After the light is emitted from the first light-transmitting unit 3111, the light will be refracted along the extension direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112, and then be emitted to the first reflecting unit 3211, and then be refracted by the first reflecting unit 3211 and be emitted to the second reflecting unit 3212, and finally be emitted from the second light-transmitting unit 3112. When the light is emitted from the second light-transmitting unit 3112, the light will be refracted along the extension direction of the second fold line 322 and be deflected to the first light-transmitting unit 3111. Therefore, a virtual image of the first light-transmitting unit 3111 will be formed. The virtual image of the first light-transmitting unit 3111 is shown in the grid line area in FIG. 16. Therefore, a bright spot will be formed in the part where the virtual image of the first light-transmitting unit 3111 coincides with the first light-transmitting unit 3111 and the first reflecting unit 3211. It should be noted that when observed from different angles, bright spots will be formed in different virtual image areas.

[0097] On the basis of the above structure, the first reflecting unit 3211 can further include the first reflecting unit first unit surface 32111 and the first reflecting unit second unit surface 32112 which are distributed in sequence in the direction away from the first light-transmitting unit 3111. The angle between the first reflecting unit first unit surface 32111 and the second reference bottom surface is 60°, and the angle between the first reflecting unit second unit surface 32112 and the second reference bottom surface is 55°. The second reflecting unit 3212 can include the second reflecting unit first unit surface 32121 and the second reflecting unit second unit surface 32122 which are distributed in the direction away from the second light-transmitting unit 3112. The angle between the second reflecting unit first unit surface 32121 and the second reference bottom surface is 60°, and the angle between the second reflecting unit second unit surface 32122 and the second reference bottom surface is 55°.

[0098] After the light rays enter from the first light-transmitting unit 3111, the light rays will be refracted along the extension direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112, and then be incident on the first reflecting unit 3211. Part of the light rays incident on the first reflecting unit 3211 is reflected by the first unit surface 32111 of the first reflecting unit to the first unit surface 32121 of the second reflecting unit, and another part of the light rays is reflected by the second unit surface 32112 of the first reflecting unit to the second unit surface 32122 of the second reflecting unit. Then, the light rays are reflected by the first unit surface 32121 of the second reflecting unit and the second unit surface 32122 of the second reflecting unit, and finally exit through the second light-transmitting unit 3112. When the light rays exit through the second light-transmitting unit 3112, the light rays will be refracted along the extension direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112. Thus, a virtual image of the first light-transmitting unit 3111 is formed. Therefore, a first bright spot is formed at the portion where the virtual image of the first light-transmitting unit 3111 coincides with the first light-transmitting unit 3111 and the second unit surface 32122 of the second reflecting unit. The first bright spot is triangular. A second bright spot is formed at the portion where the virtual image of the first light-transmitting unit 3111 coincides with the second light-transmitting unit 3112 and the second unit surface 32112 of the first reflecting unit. The second bright spot is trapezoidal. It should be noted that the first bright spot and the second bright spot are observed when the first interface 31 is observed at an observation angle different from the angle between the second reference bottom surface.

[0099] By the above technical solution, the first interface units 311 arranged on the surface (i.e., the first interface 31) of the optical assembly 3 enable the light to be refracted in the direction of the second fold line 322 when the light is incident into or out of the optical assembly 3 from the first interface unit 311, and since the light can be refracted in the direction of the second fold line 322 when the light is incident into the optical assembly 3 from the first interface unit 311, the light can be refracted in the direction of the second fold line 322 when the light is reflected from the first reflection unit 3211 to the second reflection unit 3212, so that the light can be incident into the optical assembly 3 from the first light transmission unit 3111 including at least one first interface unit 311, be reflected by the first reflection unit 3211 after being refracted by the first light transmission unit 3111, be reflected by the second reflection unit 3212 after being reflected by the first reflection unit 3211, and be emitted from the second light transmission unit 3112 including at least one first interface unit 311, so as to form three-dimensional refraction and reflection of the light in the optical assembly 3, and the optical path is more three-dimensional and complex, and the bright spots formed on the surface are more dynamic. In addition, the first reflection unit first unit surface 32111, the first reflection unit second unit surface 32112, the second reflection unit first unit surface 32121, and the second reflection unit second unit surface 32122 included in the first reflection unit and the second reflection unit enable more bright spots to be generated on the first interface 31 of the optical assembly 3 without arranging too many first interface units 311 on the first interface 31, so that the design difficulty of the surface of the optical assembly 3 can be simplified, the manufacturing difficulty of the mold for injection molding the optical assembly 3 is also reduced, and the production cost of the optical assembly 3 is further reduced.

[0100] In some specific embodiments, the optical assembly 3 can include a plurality of first light returning units. The plurality of first light returning units can be arranged in the same direction or in two directions to form a first light returning unit array.

[0101] In some specific embodiments, the optical assembly 3 can include a plurality of second light returning units. The plurality of second light returning units can be arranged in the same direction or in two directions to form a second light returning unit array. In some preferred embodiments, the plurality of second light returning units can be arranged in the extension direction of the second fold line 322, so that the first reflection unit 3211 and the second reflection unit 3212 of the plurality of second light returning units can be connected, i.e., one or more fold lines can be formed on the second interface without other processing.

[0102] In some specific embodiments, the optical assembly 3 can include a plurality of first light returning units and a plurality of second light returning units, and the first light returning units and the second light returning units can be arranged as needed.

[0103] Further, the optical assembly 3 can further include a plurality of first interface unit surfaces 311 and / or a plurality of second interface unit surfaces 321 which do not belong to the first light returning unit and do not belong to the second light returning unit to adapt to the modeling requirements. The present application can realize more change modes, which are not described here.

[0104] In some specific embodiments, as shown in FIG. 1, the first interface unit surface 311 can be provided as a triangular surface or a quadrilateral surface, a pentagonal surface or the like polygonal surface, and the specific shape of the first interface unit surface 311 is not limited, the edge length of the first interface unit surface 311 on the projection plane perpendicular to the front-rear direction is greater than or equal to 3 mm and less than or equal to 30 mm, preferably, the edge length of most of the first interface unit surfaces 311 on the projection plane perpendicular to the front-rear direction is greater than or equal to 15 mm and less than or equal to 30 mm, so as to facilitate the cutting of the first interface unit surface 311, and at the same time, due to the partial overlap of the first interface unit surface 311 and the second interface unit surface 321, the dazzling effect can still be realized, and the first interface unit surface 311 is a plane or an approximately plane.

[0105] Specifically, taking a vehicle lamp with a transverse arrangement as an example, a part of the vehicle lamp is facing the front of the vehicle, another part is facing the side of the vehicle, and there is also an arc-shaped transition part between the two parts, then the first interface unit surface 311 in the part of the vehicle lamp facing the front and the side of the vehicle body can be preferably provided as a plane, and the first interface unit surface 311 in the arc-shaped transition part of the vehicle lamp can be preferably provided as an approximately plane, i.e. the first interface unit surface 311 is provided as slightly convex in the direction away from the vehicle, so as to facilitate the realization of the arc-shaped transition of the optical assembly 3, and the curvature radius of the first interface unit surface 311 can be set to be consistent with the curvature radius of the arc-shaped transition part of the vehicle lamp.

[0106] It should be noted that the first interface unit surface 311 can be provided as mainly a triangular surface, the number of the first interface unit surfaces 311 in the triangular surface accounts for at least 98% of the total number of the first interface unit surfaces 311, or the projection area of the first interface unit surfaces 311 in the triangular surface on the projection plane perpendicular to the front-rear direction accounts for at least 98% of the projection area of the first interface 31 on the projection plane perpendicular to the front-rear direction, so that more first interface unit surfaces 311 in the triangular surface are provided on the first interface 31 under the premise of the same area, so that the number of the first interface unit surfaces 311 is more, so that the light emitted by the light source 1 can be emitted in more directions under the action of the first interface 31, so as to be able to improve the dazzling effect of the light, in addition, the first interface unit surfaces 311 in the polygonal surface can be uniformly distributed on the first interface 31, so that the dazzling of the light is more uniform, and the local insufficient brightness or excessive brightness is not easy to occur.

[0107] Similarly, as shown in FIG. 2, the second interface unit surface 321 can be provided as a triangular surface or a quadrilateral surface, a pentagonal surface, or the like, and the specific shape of the second interface unit surface 321 is not limited, and the edge length of the second interface unit surface 321 on the projection surface perpendicular to the front-rear direction is greater than or equal to 3 mm and less than or equal to 30 mm, and preferably, the edge length of most of the second interface unit surfaces 321 on the projection surface perpendicular to the front-rear direction is greater than or equal to 15 mm and less than or equal to 30 mm, so as to facilitate the cutting of the second interface unit surface 321, and at the same time, due to the partial overlap of the first interface unit surface 311 and the second interface unit surface 321, the sparkling effect can still be achieved, and the second interface unit surface 321 is a plane or an approximately plane.

[0108] Specifically, taking a laterally arranged vehicle lamp as an example, part of the vehicle lamp is forward-facing, and another part is side-facing, and there is also an arc-shaped transition part between the two parts, and the second interface unit surface 321 in the part of the vehicle lamp facing forward and the part of the vehicle lamp facing the side of the vehicle body can be preferably provided as a plane, and the second interface unit surface 321 in the arc-shaped transition part of the vehicle lamp can be preferably provided as an approximately plane, i.e., the second interface unit surface 321 is slightly convex in the direction away from the vehicle, so as to facilitate the realization of the arc-shaped transition of the optical assembly 3, and the radius of curvature of the second interface unit surface 321 can be set to be consistent with the radius of curvature of the arc-shaped transition part of the vehicle lamp.

[0109] It should be noted that the second interface unit surface 321 can be provided as a triangular surface, and the number of the second interface unit surfaces 321 in the form of a triangular surface accounts for at least 98% of the total number of the second interface unit surfaces 321; or the projection area of the second interface unit surfaces 321 in the form of a triangular surface on the projection surface perpendicular to the front-rear direction accounts for at least 98% of the projection area of the second interface 32 on the projection surface perpendicular to the front-rear direction, so that more second interface unit surfaces 321 in the form of a triangular surface are provided on the second interface 32 under the premise of the same area, so that the number of the second interface unit surfaces 321 is more, so that the light emitted by the light source 1 can be emitted in more directions under the action of the second interface 32, so as to improve the sparkling effect of the light, and in addition, the second interface unit surfaces 321 in the form of a polygonal surface can be uniformly distributed on the second interface 32, so that the sparkling of the light is more uniform, and the situation of insufficient or excessive brightness in a local area is less likely to occur.

[0110] In some embodiments, the optical assembly comprises a light guide element, the first interface 31 and the second interface 32 are two optical surfaces of the light guide element, in which case the first interface 31 and the second interface 32 can both be light-transmissive surfaces, so that the light emitted by the light source, after being refracted in sequence by the second interface 32 and the first interface 31, produces a sparkling effect on the first interface 31, and the second interface 32 can also form a total reflection surface relative to the first interface 31, that is, the light incident from the first interface 31 can be totally reflected by the second interface 32, thereby producing a sparkling effect on the first interface 31, so that the car lamp has a sparkling light effect in both the lit and unlit states. In this embodiment, the light guide element can be made of transparent plastic (PC or PMMA). Further, as shown in FIG. 4, the light guide element 3 is a non-equal-wall-thickness part, and its thickness can be set to be greater than or equal to 1.5 mm and less than or equal to 8 mm, so as to ensure sufficient strength and good light transmissivity, and the cooperation of the first interface 31 and the second interface 32 enables the sparkling effect to be achieved on a relatively thin optical assembly 3, thereby saving cost and reducing weight.

[0111] In some embodiments, the optical assembly comprises a light guide element and a reflective element 2, the first interface 31 is an optical surface of the light guide element, and the second interface 32 is a reflective surface of the reflective element 2, so that the light emitted by the light source is reflected by the reflective surface of the reflective element 2 and then refracted by the first interface 31, thereby forming a sparkling light effect on the first interface 31.

[0112] In some embodiments, the plurality of second interface units 321 of the reflective element 2 form a plurality of rows of reflective unit surfaces 21, and adjacent two rows of reflective unit surfaces 21 can form a stepped structure, and the edges of the stepped structure protruding towards the optical assembly 3 are formed with grooves 22 recessed away from the optical assembly 3.

[0113] In some variations of the embodiment in which the optical assembly comprises a light guide element and a reflective element 2, the first interface 31 and the second interface 32 are two optical surfaces of the light guide element, and the reflective element 2 forms a plurality of rows of reflective unit surfaces 21. Thus, the first interface 31, the second interface 32, and the reflective unit surfaces 21 cooperate to further achieve a sparkling light effect.

[0114] Specifically, the reflection unit faces 21 can be arranged such that normals of adjacent reflection unit faces 21 are inconsistent, and the reflection unit faces 21 partially overlap the first interface unit faces 311 of the corresponding regions and are inconsistent with the normals of the first interface unit faces 311 of the corresponding regions on the projection plane perpendicular to the front-rear direction. As shown in FIG. 3, the reflection unit faces 21 can be arranged as triangular faces or polygonal faces such as quadrilateral faces, pentagonal faces, etc., and the specific shape of the reflection unit faces 21 is not limited, and the smallest side of the reflection unit faces 21 on the projection plane perpendicular to the front-rear direction is greater than 1 / 2 of the smallest side of the first interface unit faces 311 and the second interface unit faces 321 corresponding thereto, so as to ensure the sparkling quality of the light while preventing the light from being too fragmented, and the reflection unit faces 21 are planar or approximately planar. Specifically, taking a vehicle lamp arranged in a transverse manner as an example, part of the vehicle lamp faces forward, another part faces the side of the vehicle body, and there is an arc-shaped transition part between the two parts, and the reflection unit faces 21 in the parts of the vehicle lamp facing forward and the side of the vehicle body can be preferably arranged as planar, and the reflection unit faces 21 in the arc-shaped transition part of the vehicle lamp can be preferably arranged as approximately planar, i.e., the reflection unit faces 21 are slightly convex in the direction away from the vehicle, so as to facilitate the realization of the arc-shaped transition of the reflection element 2, and the radius of curvature of the reflection unit faces 21 can be arranged to be consistent with the radius of curvature of the arc-shaped transition part of the vehicle lamp.

[0115] It should be noted that the reflection unit faces 21 can be mainly arranged as triangular faces, and the number of the reflection unit faces 21 arranged as triangular faces accounts for at least 98% of the total number of the reflection unit faces 21; or the projection area of the reflection unit faces 21 arranged as triangular faces on the projection plane perpendicular to the front-rear direction accounts for at least 98% of the projection area of the reflection surface on the projection plane perpendicular to the front-rear direction. Under the premise of the same area, arranging more reflection unit faces 21 arranged as triangular faces on the reflection surface can increase the number of the reflection unit faces 21, so that the light emitted by the light source 1 can be emitted in more directions under the action of the reflection surface, so as to improve the sparkling effect of the light. In addition, the reflection unit faces 21 arranged as polygonal faces can be uniformly arranged on the reflection surface, so as to make the sparkling of the light more uniform and avoid local insufficient brightness or excessive brightness.

[0116] In some specific embodiments, the reflection surface of the reflection element 2 is formed with a plurality of rows of reflection unit faces 21, and adjacent two rows of reflection unit faces 21 can form a stepped structure, and a groove 22 recessed away from the optical assembly 3 is formed on the edge of the stepped structure protruding toward the optical assembly 3, so as to weaken the stepped structure and avoid seeing obvious reflection boundaries through the optical assembly while optimizing the lighting effect.

[0117] In the embodiment for the vehicle front or rear combination lamp, a horizontal reference plane can be set at the height of the vehicle lamp, and a vertical reference plane can be set at the middle of the vehicle lamp, and the vertical reference plane is parallel to the front-rear direction, and the normal of the first interface unit surface 311, the second interface unit surface 321 and the reflection unit surface 21 can be set to have an angle of -60° (i.e. 60° to the left) to 60° (i.e. 60° to the right) with the front-rear direction on the horizontal reference plane, so that the dazzling light effect of the vehicle lamp can be observed by the people within the range of 120° in the front, left and right directions of the vehicle, and the normal of the first interface unit surface 311, the second interface unit surface 321 and the reflection unit surface 21 can have an angle of -20° (i.e. 20° downward) to 70° (i.e. 70° upward) with the front-rear direction on the vertical reference plane, so that the dazzling light effect of the vehicle lamp can be observed by the people within the range of 0.5-100 m in front of the vehicle.

[0118] In order to better understand the optical assembly 3 of the present application, the optical assembly of the present application is described below in combination with the specific embodiments of the second light returning unit:

[0119] As shown in FIGS. 11-18, the second light returning unit of the optical assembly of the present application includes a first light transmitting unit 3111 and a second light transmitting unit 3112, the first light transmitting unit 3111 and the second light transmitting unit 3112 respectively including at least one first interface unit surface 311; and a first reflection unit 3211 and a second reflection unit 3212, the first reflection unit 3211 and the second reflection unit 3212 respectively including at least one second interface unit surface 321, the first light transmitting unit 3111 and the second light transmitting unit 3112 being obliquely intersected to form a first fold line 312, the first reflection unit 3211 and the second reflection unit 3212 being intersected to form a second fold line 322, the first fold line 312 and the second fold line 322 being non-coplanar, and the first fold line 312 and the second fold line 322 having an angle of 60°. The optical assembly 3 is made of PMMA material, and the angle between the first light transmitting unit 3111 and the first reference bottom surface and the angle between the second light transmitting unit 3112 and the first reference bottom surface are both 5°, and the angle between the first reflection unit 3211 and the second reference bottom surface and the angle between the second reflection unit 3212 and the second reference bottom surface are both 60°.

[0120] Based on the above structure, taking the example that light is emitted from the first light-transmitting unit 3111 and emitted from the second light-transmitting unit 3112, the optical path of the light in the optical assembly 3 is shown in FIGS. 12 to 14. After the light is emitted from the first light-transmitting unit 3111, the light will be refracted in the direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112 on the left side, and then be refracted by the first reflecting unit 3211 and be emitted to the second reflecting unit 3212. Finally, the light is emitted from the second light-transmitting unit 3112 and will be refracted in the direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112 on the right side. Therefore, a virtual image of the first light-transmitting unit 3111 will be formed on the light-transmitting surface, and the virtual image of the first light-transmitting unit 3111 is shown in the grid line area in FIG. 13. Thus, a bright spot will be formed in the part where the virtual image of the first light-transmitting unit 3111 coincides with the first light-transmitting unit 3111 and the first reflecting unit 3211. It should be noted that the bright spot here refers to the bright spot formed by the light emitted from the first light-transmitting unit 3111 at different incident angles. When the light is emitted from the first light-transmitting unit 3111 at different angles, the position of the bright spot will change.

[0121] On the basis of the above structure, the first reflecting unit first unit surface 32111 and the first reflecting unit second unit surface 32112 distributed along the light-emitting direction can be arranged on the first reflecting unit 3211, the angle between the first reflecting unit first unit surface 32111 and the second reference bottom surface is 60°, and the angle between the first reflecting unit second unit surface 32112 and the second reference bottom surface is 55°. The second reflecting unit first unit surface 32121 and the second reflecting unit second unit surface 32122 distributed along the light-emitting direction can be arranged on the second reflecting unit 3212, the angle between the second reflecting unit first unit surface 32121 and the second reference bottom surface is 60°, and the angle between the second reflecting unit second unit surface 32122 and the second reference bottom surface is 55°.

[0122] After the light rays enter from the first light-transmitting unit 3111, the light rays will be refracted in the direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112 on the left side, and then be refracted to the first reflecting unit 3211. Part of the light rays refracted to the first reflecting unit 3211 will be reflected by the first unit surface 32111 of the first reflecting unit to the first unit surface 32121 of the second reflecting unit, and another part of the light rays will be reflected by the second unit surface 32112 of the first reflecting unit to the second unit surface 32122 of the second reflecting unit. Then, the light rays will be reflected by the first unit surface 32121 of the second reflecting unit and the second unit surface 32122 of the second reflecting unit, and finally be emitted from the second light-transmitting unit 3112. When the light rays are emitted from the second light-transmitting unit 3112, the light rays will be refracted in the direction of the second fold line 322 and be deflected to the second light-transmitting unit 3112 on the right side. Therefore, a virtual image of the first light-transmitting unit 3111 will be formed on the light-transmitting surface. Thus, a first bright spot in the shape of a triangle will be formed at the position where the virtual image of the first light-transmitting unit 3111 coincides with the first light-transmitting unit 3111 and the second unit surface 32122 of the second reflecting unit, and a second bright spot in the shape of a trapezoid will be formed at the position where the virtual image of the first light-transmitting unit 3111 coincides with the second light-transmitting unit 3112 and the second unit surface 32112 of the first reflecting unit. It should be noted that the first bright spot and the second bright spot are observed at different observation angles with respect to the second reference bottom surface when the first interface 31 is observed.

[0123] By the technical scheme, the first interface units 311 arranged on the surface (i.e. the first interface 31) of the optical assembly 3 enable the light to be refracted in the direction of the second fold line 322 when the light is incident into or emitted from the optical assembly 3, and since the light can be refracted in the direction of the second fold line 322 when the light is incident into the optical assembly 3, the light can be deflected in the direction of the second fold line 322 when the light is reflected from the first reflection unit 3211 to the second reflection unit 3212, so that the light can be incident into the optical assembly 3 from the first light transmission unit 3111, refracted by the first light transmission unit 3111, reflected by the first reflection unit 3211 to the second reflection unit 3212, and then emitted from the second light transmission unit 3112 to form the three-dimensional refraction and reflection of the light in the optical assembly 3, the optical path is more three-dimensional and complex, and the bright spot formed on the surface is more dynamic. In addition, by the design of the first unit surface 32111, the second unit surface 32112, the third unit surface 32121 and the fourth unit surface 32122, the first interface 31 of the optical assembly 3 does not need to be provided with too many light transmission surfaces to generate more bright spots, so that the design difficulty of the surface of the optical assembly 3 can be simplified, and the manufacturing difficulty of the mold for injection molding the optical assembly 3 is also reduced, thereby reducing the production cost of the optical assembly 3.

[0124] Further, the utility model discloses a third aspect of providing a vehicle, and the vehicle includes the optical system in the above technical scheme, and therefore also has all the technical effects of the optical system.

[0125] Further, the utility model discloses a third aspect of providing a vehicle, and the vehicle includes the optical system in the above technical scheme, and therefore also has all the technical effects of the optical system.

[0126] It is also to be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0127] The above merely provides an example of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall fall into the scope of claims of the present application.

Claims

1. An optical assembly, comprising: The optical assembly (3) comprises a first interface (31) and a second interface (32) arranged in sequence along the front-rear direction; the first interface (31) is provided with a plurality of first interface unit surfaces (311), and normal directions of adjacent first interface unit surfaces (311) are inconsistent; the second interface (32) is provided with a plurality of second interface unit surfaces (321), and normal directions of adjacent second interface unit surfaces (321) are inconsistent; In a projection plane perpendicular to the front-rear direction, the first interface unit surface (311) partially overlaps the corresponding area of the second interface unit surface (321), and the normal directions of the two are inconsistent.

2. The optical assembly of claim 1, wherein, The optical assembly (3) comprises at least one first light returning unit, the first light returning unit comprises: the first interface unit surface (311), and at least two second interface unit surfaces (321) partially overlapping the first interface unit surface (311) in a projection plane perpendicular to the front-rear direction, in the first light returning unit, at least part of the light rays entering the optical assembly (3) from the first interface unit surface (311) are reflected by the at least two second interface unit surfaces (321) and then exit from the first interface unit surface (311).

3. The optical assembly of claim 1, wherein, The optical assembly comprises at least one second light returning unit, the second light returning unit comprises: a first light transmission unit (3111) and a second light transmission unit (3112), the first light transmission unit (3111) and the second light transmission unit (3112) respectively comprise at least one first interface unit surface (311); and a first reflection unit (3211) and a second reflection unit (3212), the first reflection unit (3211) and the second reflection unit (3212) respectively comprise at least one second interface unit surface (321), in the second light returning unit, at least part of the light rays entering the optical assembly (3) from the first light transmission unit (3111) are sequentially reflected by the first reflection unit (3211) and the second reflection unit (3212) and then exit from the second light transmission unit (3112).

4. The optical assembly of claim 3, wherein, In the second light returning unit, at least part of the light rays entering the optical assembly (3) from the first light transmission unit (3111) are sequentially reflected by the first reflection unit (3211) and the second reflection unit (3212) and then exit from the second light transmission unit (3112), forming a virtual image of the first light transmission unit (3111), the virtual image of the first light transmission unit (3111) partially overlaps at least two first interface unit surfaces (311) and at least two second interface unit surfaces (321) in a projection plane perpendicular to the front-rear direction, the virtual image of the first light transmission unit (3111) is divided into a plurality of virtual image areas by the at least two first interface unit surfaces (311) and the at least two second interface unit surfaces (321), and a plurality of the virtual image areas form bright spots in different viewing angle ranges, respectively.

5. The first light-transmitting unit (3111) and the second light-transmitting unit (3112) are obliquely intersected to form a first fold ridge line (312), the first reflecting unit (3211) and the second reflecting unit (3212) are intersected to form a second fold ridge line (322), the first fold ridge line (312) and the second fold ridge line (322) are not coplanar, and the first fold ridge line (312) and the second fold ridge line (322) intersect on a projection plane perpendicular to the front-back direction.

6. The optical assembly of claim 5, wherein, The first light-transmitting unit (3111) and the second light-transmitting unit (3112) are adjacent to have a first reference bottom surface opposite to the first fold ridge line (312), and the included angle between the first interface unit surface (311) in the first light-transmitting unit (3111) and the first reference bottom surface and the included angle between the first interface unit surface (311) in the second light-transmitting unit (3112) and the first reference bottom surface are both greater than 1° and less than or equal to 73°.

7. The optical assembly of claim 6, wherein, The included angles between the first light-transmitting unit (3111) of different second light-reflecting units and the first reference bottom surface are at least partially different; the included angles between the second light-transmitting unit (3112) of different second light-reflecting units and the first reference bottom surface are at least partially different.

8. The optical assembly of claim 6, wherein, The included angle between the first light-transmitting unit (3111) and the first reference bottom surface and / or the included angle between the second light-transmitting unit (3112) and the first reference bottom surface decreases as the refractive index of the molding material of the optical assembly (3) increases.

9. The optical assembly of claim 5, wherein, The first reflecting unit (3211) and the second reflecting unit (3212) are adjacent to have a second reference bottom surface opposite to the second fold ridge line (322), and the included angle between the second interface unit surface (321) in the first reflecting unit (3211) and the second reference bottom surface and the included angle between the second interface unit surface (321) in the second reflecting unit (3212) and the second reference bottom surface are both greater than or equal to 29° and less than or equal to 62°.

10. The optical assembly of claim 5, wherein, The first light-transmitting unit (3111) and the second light-transmitting unit (3112) have a first reference bottom surface opposite to the first fold ridge line (312), the first reflecting unit (3211) and the second reflecting unit (3212) have a second reference bottom surface opposite to the second fold ridge line (322), and the first reference bottom surface and the second reference bottom surface are parallel.

11. The optical assembly of claim 3, wherein, The first reflecting unit (3211) and the second reflecting unit (3212) are total reflection surfaces.

12. The optical assembly of claim 5, wherein, The included angle between the first fold ridge line (312) and the second fold ridge line (322) is 45° to 90°.

13. The optical assembly of claim 4, wherein, The first reflection unit (3211) comprises two second interface unit surfaces (321), namely a first reflection unit first unit surface (32111) and a first reflection unit second unit surface (32112) arranged in sequence in a direction away from the first light-transmitting unit (3111); the second reflection unit (3212) comprises two second interface unit surfaces (321), namely a second reflection unit first unit surface (32121) and a second reflection unit second unit surface (32122) arranged in sequence in a direction away from the second light-transmitting unit (3112).

14. The optical assembly of claim 13, wherein, The included angle between the first reflection unit first unit surface (32111) and the second reference bottom surface is greater than the included angle between the first reflection unit second unit surface (32112) and the second reference bottom surface. The included angle between the second reflection unit first unit surface (32121) and the second reference bottom surface is greater than the included angle between the second reflection unit second unit surface (32122) and the second reference bottom surface.

15. The optical assembly of any of claims 1-14, wherein, Part of the first interface unit surfaces (311) are polygonal surfaces, and part of the first interface unit surfaces (311) are triangular surfaces. The number of the first interface unit surfaces (311) in triangular surfaces accounts for at least 98% of the total number of the first interface unit surfaces (311); or, The projection area of the first interface unit surfaces (311) in triangular surfaces on a projection plane perpendicular to the front-back direction accounts for at least 98% of the projection area of the first interface (31) on the projection plane perpendicular to the front-back direction.

16. The optical assembly of any one of claims 1-14, wherein, The side length of the second interface unit surface (321) is greater than or equal to 3mm and less than or equal to 30mm, and the second interface unit surface (321) is a plane or an approximately plane.

17. The optical assembly of any one of Claims 1-14, wherein, Part of the second interface unit surfaces (321) are polygonal surfaces, and part of the second interface unit surfaces (321) are triangular surfaces. The number of the second interface unit surfaces (321) in triangular surfaces accounts for at least 98% of the total number of the second interface unit surfaces (321); or, The projection area of the second interface unit surfaces (321) in triangular surfaces on a projection plane perpendicular to the front-back direction accounts for at least 98% of the projection area of the second interface (32) on the projection plane perpendicular to the front-back direction.

18. The optical assembly of any of claims 1-14, wherein, The thickness of the optical assembly (3) is greater than or equal to 1.5mm and less than or equal to 8mm.

19. The optical assembly of any of claims 1-14, wherein, The side length of the first interface unit surface (311) is greater than or equal to 3mm and less than or equal to 30mm, and the first interface unit surface (311) is a plane or an approximately plane.

20. The optical assembly of any of claims 1-14, wherein, The optical assembly comprises a light guide element, and the first interface (31) and the second interface (32) are two optical surfaces of the light guide element.

21. The optical assembly of any of claims 1-14, wherein, The optical assembly comprises a light guide element and a reflection element (2), the first interface (31) is an optical surface of the light guide element, and the second interface (32) is a reflection surface of the reflection element (2).

22. The optical assembly of claim 21, wherein, The plurality of second interface unit surfaces (321) of the reflective element (2) form a plurality of rows of reflective unit surfaces (21), and adjacent two rows of the reflective unit surfaces (21) can form a step structure, and a ridge of the step structure protruding towards the optical assembly (3) is provided with a groove (22) recessed away from the optical assembly (3).

23. An optical system characterized by, Comprising: A light source and an optical assembly according to any one of claims 1 to 22.

24. A vehicle characterized by comprising: Comprising: An optical system according to claim 23.

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