CN115435293B

CN115435293B - Thick-wall optical module with good light condensation effect and car lamp system

Info

Publication number: CN115435293B
Application number: CN202211321807.6A
Authority: CN
Inventors: 郑贤良; 周晓萍
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-24
Anticipated expiration: 2042-10-27
Also published as: CN115435293A

Abstract

The invention relates to the technical field of optical modules, in particular to a thick-wall optical module with good light condensation effect and a car lamp system, which comprise a light source and a thick-wall element, wherein the thick-wall element comprises a light condensation structure, a projection surface and a cut-off structure; the light-gathering structure is positioned on one side of the light source, the stopping structure is connected with the light-gathering structure, a boundary is formed at the connecting position of the stopping structure and the light-gathering structure, the projection surface is positioned on one side of the light-gathering structure far away from the stopping structure and is connected with the light-gathering structure, a central area is arranged in the center of the projection surface, one focus of the light-gathering structure falls into the central area, and the central area is an area S. The thick-wall optical module and the car lamp system with good light condensation effect have the advantages of few parts, good light condensation effect, light weight and small volume, and production time and cost are saved.

Description

Thick-wall optical module with good light condensation effect and car lamp system

Technical Field

The invention relates to the technical field of optical modules, in particular to a thick-wall optical module with a good light condensation effect and a car lamp system.

Background

At present, in an automotive headlamp module, in order to realize a cut-off line, an optical scheme of a reflector, a baffle and a lens is generally adopted, the reflector is generally an ellipsoid, a first focus of the reflector coincides with a light source, and a second focus of the reflector is located near the baffle so as to collect light emitted by the light source and gather the light near the baffle to form a light spot; the baffle covers or reflects part of light spots, the light transmission part forms a bent or horizontal sharp boundary, the bent boundary is used for the near light module, and the horizontal boundary is used for the front fog light; the focal point of the lens is superposed with the baffle, so that the sharp boundary at the baffle is projected to the front of the vehicle to form a cut-off light type with a bright lower part and a dark upper part. Among the above scheme, except that the installing support, every module contains three part: a mirror, a baffle, and a lens; certain positioning precision is required between the baffle and the reflector to prevent the displacement of the brightest point of the dipped beam; high positioning precision is needed between the baffle and the lens to ensure that the cut-off line is clear.

In the conventional thick-wall component of the headlamp optical module, a light source approximately coincides with a first focus of a reflector, and a second focus of the reflector approximately coincides with a focus of a lens. The distance from the first focus (light source) of the reflector to the reflector is L1, the distance from the reflector to the second focus (light blocking structure) of the reflector is L2, and the distance from the second focus of the reflector to the projection surface is L3, so the optical path length of the module is the sum of L1, L2 and L3, and L1 < L2 is approximately equal to L3 under the general condition. Therefore, the conventional thick-walled member for the optical module of the headlamp has disadvantages in that the volume and weight are large, the production time of the thick-walled member is long, the cost is high, and the load of the dimming structure is increased. The larger module volume is contrary to the trend of the current car light compactness, miniaturization, and the layout of the module in the car light is more limited, which is not beneficial to the modeling design.

Disclosure of Invention

The present invention is directed to solving one of the above problems.

The invention aims to solve the technical problems that the existing headlamp optical module thick-wall part has longer module light path length, so that the size and the weight of the optical module thick-wall part are larger, the production time is long, and the cost is high.

The technical scheme adopted by the invention for solving the technical problems is as follows: a thick-wall optical module with good light condensation effect comprises a light source and a thick-wall element, wherein the thick-wall element comprises a light condensation structure, a projection surface and a cut-off structure;

the light-gathering structure is positioned on the front surface of the light source, the cut-off structure is connected with the light-gathering structure, a boundary is formed at the connection position of the cut-off structure and the light-gathering structure, the projection surface is positioned on one side of the light-gathering structure, which is far away from the cut-off structure, the projection surface is connected with the light-gathering structure, the center of the projection surface is provided with a central area, one focus of the light-gathering structure falls into the central area, and the central area is an area S;

the light emitted by the light source irradiates the light gathering structure and the cut-off structure, the light irradiated from the light source onto the light gathering structure can be completely projected onto the projection surface under the action of the light gathering structure, and the light emitted from the center of the light source can be completely gathered in the area S under the action of the light gathering structure;

after being refracted or reflected by the cut-off structure, the light rays irradiated from the light source to the cut-off structure can be all irradiated to the area except the light-gathering structure, the projection surface is a curved surface, and the light rays emitted by the boundary are collimated by the projection surface, so that the light rays emitted out of the projection surface form light distribution with the cut-off line.

According to the thick-wall optical module with a good light condensation effect, due to the arrangement of the light condensation structure, light rays irradiated from the light source to the light condensation structure can be all projected onto the projection surface, so that the utilization rate of the light rays of the light source is greatly improved; one focus of the light condensation structure is set to fall into the central area S of the projection surface, so that light rays emitted from the center of the light source can be condensed in the central area S of the projection surface through the light condensation structure, and the light condensation effect is good;

in addition, one of the focuses of the light condensation structure is set to fall on the projection surface, and the light condensation structure further has the effects that the distance L3 from the second focus of the light condensation structure to the projection surface is 0, so that the optical path length of the whole module is reduced, the size and the weight of the whole thick-wall optical module are further reduced, the production cost and the production time of the single thick-wall optical module are further effectively reduced, especially in the process of mass production, the number of the thick-wall optical modules produced in unit time is more, the production efficiency is greatly improved, the production cost is reduced, and the economic benefit in the mass production is remarkably improved.

Further, the dividing line is a curved line with a lower left side and a higher right side, so that the light rays exiting the projection surface form a light distribution with a low-beam cut-off line.

Further, the shape of the boundary line is an arc-shaped curve which is gradually bent upwards from the middle to the two ends, so that the light rays emitted out of the projection plane form light distribution with a fog lamp cut-off line.

Further, the focal point of the projection surface falls below the boundary line.

Further, the light condensation structure comprises a first curved surface, the first curved surface is connected with the cut-off structure, the first curved surface is connected with the projection surface through a second curved surface, one side of the first curved surface, away from the light source, is the outer side, and the first curved surface is a curved surface protruding towards the outer side.

Further, the first curved surface is a part of an ellipsoidal curved surface or a free-form curved surface.

Further, the thick-wall element further comprises a light incident surface, the light incident surface is located between the light gathering structure and the light source, and the light incident surface is a lens.

Further, the light incident surface is connected with the projection surface through a curved surface III.

Furthermore, microstructures are arranged on the second curved surface and the third curved surface. The micro structure is used for reducing the total reflection light of the second curved surface and the third curved surface.

Further, the projection plane is a curved plane, a straight line passing through a center point of the projection plane and perpendicular to a normal plane of the projection plane is k, the projection plane is a part of a spherical surface or a part of an aspheric surface which is rotationally symmetric around the straight line k, and a focus of the projection plane is located below the boundary.

Further, the projection surface is a free-form surface, and one of the focal points of the projection surface is located below the boundary.

Furthermore, the projection surface is provided with a diffraction structure which is in an annular step shape, and light passing through the projection surface is simultaneously subjected to refraction and diffraction effects, so that dispersion caused by refraction is reduced, sharpness of a cut-off line is improved, and light color of the cut-off line is improved.

Further, the thick-walled member is made of a transparent resin material.

Further, after the center of the light source passes through the light incident surface, a light source center virtual image is formed between the light incident surface and the light condensing structure, and the light source center virtual image is located at the other focus of the light condensing structure.

Further, a vertical plane where the straight line k is located is a vertical plane H, an intersection point of the boundary line and the plumb surface H passing through the straight line k is an intersection point P, and a distance from the center of the light source to the intersection point P is 2mm to 8mm.

Further, the effective focal length of the projection plane is f, the vertical distance between the intersection point P and the straight line k is a, and the relationship between a and f is a = f × tan0.57 °.

The invention also discloses a car lamp system which comprises the thick-wall optical module with good light condensation effect.

The thick-wall optical module and the car lamp system with good light condensation effect have the following advantages:

1. light rays from the light source to the light gathering structure can be projected to the projection surface, so that the utilization rate of the light rays of the light source is greatly improved, and the light gathering effect of the thick-wall optical module is improved.

2. Through setting one of them focus with spotlight structure to falling into the central zone S of plane of projection, can be through spotlight structure with the light gathering that the light source center sent in the central zone S of plane of projection to further improve spotlight effect, make central zone S department form the great region of luminance on the plane of projection, thereby further promote thick wall optical module' S spotlight effect.

3. Set one of them focus through with spotlight structure to fall into on the plane of projection, the effect and the effect that still have are, spotlight structure's second focus is 0 to the distance L3 of plane of projection, consequently, reduce the optical path length of whole module, and then reduce the volume and the weight of whole thick wall optical module, and then the cost of the production of single thick wall optical module of effectual reduction and the time of production, especially in the in-process of mass production, the number of the thick wall optical module of production in the unit interval is more, production efficiency also can improve greatly, production cost reduces, economic benefits in mass production is showing and is improving.

4. After being refracted or reflected by the cut-off structure, the light rays irradiated from the light source to the cut-off structure can be all irradiated to the area except the light-gathering structure, and the boundary is formed into a cut-off line through projection on the projection surface, so that the thick-wall optical module can be used as an optical module in a low beam lamp or a fog lamp of a vehicle, and the application range of the thick-wall optical module is wider.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic perspective view of a thick-walled member of the present invention.

Fig. 2 is a front view of the thick-walled optical module of the present invention having a good light condensing effect.

Fig. 3 is an enlarged schematic view of the surface microstructure at a position a in the second curved surface in fig. 2.

Fig. 4 is an enlarged schematic view of the surface diffraction structure at B in the projection plane of fig. 2.

Fig. 5 is a side view of a thick-walled optical module having a good light condensing effect according to embodiment 1 of the present invention.

FIG. 6 is a schematic view of the light rays emitted from the center of the light source propagating in a thick-walled member according to the present invention.

FIG. 7 is a schematic illustration of the light rays emitted from the edge of the light source of the present invention propagating in a thick-walled member.

FIG. 8 is a thick-walled optical module pattern with a low beam cutoff structure according to the present invention.

Fig. 9 is a side view of a thick-walled optical module having a good light condensing effect according to embodiment 2 of the present invention.

Fig. 10 is a thick-walled optical module light pattern with a fog lamp cutoff line structure according to the present invention.

Fig. 11 is a thick-walled optical module light pattern with a free-form surface projection surface according to the present invention.

In the figure: 1. a light source; 2. a thick-walled member; 21. a light-gathering structure; 211. a first curved surface; 212. a curved surface II; 22. a projection surface; 23. a cut-off structure; 231. a boundary line; 24. a light incident surface; 25. and a third curved surface.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 8, which are the best embodiments of the present invention, a thick-walled optical module with good light-gathering effect includes a light source 1 and a thick-walled element 2, where the thick-walled element 2 includes a light-gathering structure 21, a projection plane 22 and a cut-off structure 23; the light-gathering structure 21 is located on the front face of the light source 1, the face, towards which light of the light source 1 is emitted, of the light-gathering structure 1 is the front face, the stopping structure 23 is connected with the light-gathering structure 21, a boundary line 231 is formed at the connection position of the stopping structure 23 and the light-gathering structure 21, the projection face 22 is located on the side, away from the stopping structure 23, of the light-gathering structure 21, the projection face 22 is connected with the light-gathering structure 21, the center of the projection face 22 is provided with a center area, one of the focal points of the light-gathering structure 21 falls into the center area, the center area is an area S, the projection face is further provided with an area Q, and after the light emitted by the light source is reflected by the light-gathering structure, most of the light is projected into the area Q. The thick-walled member 2 is made of a transparent resin material. Such as Polycarbonate (PC), is injection molded and the light source 1 is a Light Emitting Diode (LED) or a Laser Diode (LD).

The light emitted from the light source 1 irradiates onto the light gathering structure 21 and the cut-off structure 23, the light irradiated from the light source 1 onto the light gathering structure 21 can be projected onto the projection surface 22 through the action of the light gathering structure 21, and the light emitted from the center of the light source 1 can be gathered in the area S through the action of the light gathering structure 21. After being refracted or reflected by the cut-off structure 23, the light rays irradiated from the light source 1 to the cut-off structure 23 are all irradiated to the region except the light-gathering structure 21, the cut-off structure 23 is preferably a reflection structure, the optical efficiency of the cut-off structure can be improved by the reflection structure, the cut-off effect on the light rays is better, the focal point of the projection plane 22 is located below the boundary line 231, the projection plane 22 is a curved surface and has the function of collimating the light rays, and the light rays emitted by the boundary line 231 are collimated by the projection plane 22, so that the light rays emitted out of the projection plane 22 form light distribution with a cut-off line.

Referring to fig. 5 and 8, the boundary 231 is a curved line with a lower left side and a higher right side, and is collimated by the projection surface 22, so that the light emitted from the projection surface 22 forms a light distribution with a low-beam cut-off line, and in a country where the vehicle is traveling to the right, the low-beam cut-off lines of the vehicle are all the lower left side and the higher right side, and therefore, by setting the boundary 231 to be a curved line with a lower left side and a higher right side, the thick-walled optical module with a good light-condensing effect of the present invention can be used in the low-beam system of the vehicle, and the application range of the thick-walled optical module with a good light-condensing effect of the present invention is increased.

The light-condensing structure 21 comprises a first curved surface 211 and a second curved surface 212, the first curved surface 211 is connected with the cut-off structure 23, the first curved surface 211 is a part of an ellipsoidal curved surface or a free curved surface, and the first curved surface 211 is connected with the projection surface 22 through the second curved surface 212. The side of the first curved surface 211, which is far away from the light source 1, is the outer side, and the first curved surface 211 is a curved surface protruding outwards, so that light rays emitted from the light source 1 to the first curved surface 211 can be better reflected and collected on the projection surface 22 by the first curved surface 211, and the light collection effect of the light collection structure 21 is better.

The thick-wall element 2 further comprises a light inlet surface 24, the light inlet surface 24 is located between the light condensing structure 21 and the light source 1, the light inlet surface 24 is connected with the projection surface 22 through a curved surface three 25, light rays emitted by the light source 1 enter the thick-wall element 2 after passing through the light inlet surface 24, then the light rays are projected onto the light condensing structure 21 and the cut-off structure 23, the light inlet surface 24 can be a plane, a spherical surface or a free curved surface, and the light condensing structure 21 can be an ellipsoid, a paraboloid or a free curved surface.

Microstructures are arranged on the second curved surface 212 and the third curved surface 25, and the microstructures are protruding structures which are periodically or non-periodically arranged and are composed of round, square or triangular units with the size not exceeding 2 mm. The microstructure is arranged on the surface of the optical element, so that the total reflection property of the surface of the element is changed, and light rays emitted to the surface of the element from the inside of the element pass through the microstructure and are emitted out of the element.

The advantage of setting up the microstructure lies in, and the light that curved surface two 212 reflected to plane of projection 22 can form the miscellaneous light bright speck in the front lower place of module, and the light that curved surface three 25 reflected to plane of projection 22 can form miscellaneous light bright speck in the front upper place of module, destroys the module light type. Through setting up the micro-structure through curved surface two 212 and curved surface three 25 for the light through curved surface two 212 and curved surface three 25 no longer is by reflection to projection surface 22, thereby passes through projection surface 22 and transmits the light type distribution effect that forms in thick wall component 2 the place ahead good, has promoted the result of use of thick wall component 2 in the car light.

The projection surface 22 is a curved surface, a straight line passing through the center point of the projection surface 22 and perpendicular to the normal plane of the projection surface 22 is k, the projection surface 22 is a part of a spherical surface or an aspherical surface rotationally symmetric about the straight line k, and the focal point of the projection surface 22 falls on the boundary line 231.

After the center of the light source 1 passes through the light incident surface 24, a virtual light source center image is formed between the light incident surface 24 and the light condensing structure 21, and the virtual light source center image is located at the other focal point of the light condensing structure 21. The vertical plane where the straight line k is located is a vertical plane H, the intersection point of the boundary line 231 and the plumb bob plane H passing through the straight line k is an intersection point P, and the distance from the center of the light source to the intersection point P is 2mm to 8mm, including 2mm and 8mm. The effective focal length of the projection plane 22 is f, the vertical distance between the intersection point P and the straight line k is a, and the relationship between a and f is a = f × tan0.57 °.

The surface of the projection surface 22 is provided with a diffraction structure which is in an annular step shape, and light passing through the projection surface 22 is subjected to refraction and diffraction effects at the same time, so that dispersion caused by refraction is reduced, sharpness of a cut-off line is improved, and light color of the cut-off line is improved.

The invention also discloses a car lamp system which comprises the thick-wall optical module with the good light condensation effect.

According to the thick-wall optical module and the car lamp system with good light condensation effect, due to the arrangement of the light condensation structure 21, light rays irradiated from the light source 1 to the light condensation structure 21 can be all projected onto the projection surface 22, so that the utilization rate of the light rays of the light source 1 is greatly improved; by setting one of the focal points of the light condensing structure 21 to fall within the central area S of the projection surface 22, the light emitted from the center of the light source 1 can be condensed within the central area S of the projection surface 22 by the light condensing structure 21, and the light condensing effect is good.

In addition, one of the focuses of the light condensing structure 21 is set to fall on the projection surface 22, and the light condensing structure further has the effects that the distance L3 from the second focus of the light condensing structure 21 to the projection surface 22 is 0, so that the optical path length of the whole module is reduced, the volume and the weight of the whole thick-wall optical module are reduced, the production cost and the production time of the single thick-wall optical module are effectively reduced, especially in the process of mass production, the number of the thick-wall optical modules produced in unit time is more, the production efficiency is greatly improved, the production cost is reduced, and the economic benefit in the mass production is remarkably improved.

Example 2

The difference from embodiment 1 is that, referring to fig. 9, the shape of the boundary line 231 is an arc-shaped curve gradually curving upward from the middle to both ends, so that the light rays exiting the projection surface 22 form a light distribution having a fog lamp cutoff line, and as shown in fig. 10, a thick-walled optical module light type with a fog lamp cutoff structure is formed.

Example 3

The difference from embodiment 2 is that the projection surface 22 is a free curved surface, one of the focal points of the projection surface 22 is located below the dividing line 231, and the projection surface 22 has two focal points when being a free curved surface, one is a vertical surface focal point, and the other is a horizontal surface focal point, where the vertical surface focal point is located on the cutoff structure 23, and the horizontal surface focal point is far away from the cutoff structure 23, thereby forming a thick-walled optical module light type with the free curved surface projection surface 22 as shown in fig. 11, having a horizontal cutoff line, and simultaneously having a light type with a larger width in the horizontal direction, so as to illuminate a larger range of areas on the left and right of the vehicle.

The thick-wall optical module and the vehicle lamp system with good light condensation effect have the following advantages:

1. light rays irradiated to the light gathering structure 21 from the light source 1 can be projected to the projection surface 22 completely, so that the utilization rate of the light rays of the light source 1 is greatly improved, and the light gathering effect of the thick-wall optical module is improved.

2. By setting one of the focuses of the light condensing structure 21 to fall into the central area S of the projection surface 22, the light emitted from the center of the light source 1 can be condensed in the central area S of the projection surface 22 through the light condensing structure 21, so that the light condensing effect is further improved, the central area S on the projection surface 22 is formed into an area with larger illumination intensity, and the light condensing effect of the thick-wall optical module is further improved.

3. Set one of them focus through with spotlight structure 21 to fall into on the plane of projection 22, the effect and the effect that still have are, spotlight structure 21's second focus is 0 to the distance L3 of plane of projection 22, consequently, reduce the optical path length of whole module, and then reduce the volume and the weight of whole thick wall optical module, and then the cost of the production of single thick wall optical module of effectual reduction and the time of production, especially in the in-process of mass production, the number of the thick wall optical module of production in the unit interval is more, production efficiency also can improve greatly, production cost reduces, economic benefits in mass production is showing and is improving.

4. After the light rays irradiated from the light source 1 to the cut-off structure 23 are refracted or reflected by the cut-off structure 23, all the light rays are irradiated to the region except the light-gathering structure 21, and the light rays emitted from the boundary 231 are collimated by the projection surface 22 to form a cut-off line, so that the thick-wall optical module can be used as an optical module in a low beam lamp or a fog lamp of a vehicle, and the application range of the thick-wall optical module is wider.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined by the scope of the claims.

Claims

1. The utility model provides an effectual thick wall optical module of spotlight which characterized in that: the device comprises a light source (1) and a thick-walled element (2), wherein the thick-walled element (2) comprises a light-gathering structure (21), a projection surface (22) and a cut-off structure (23);

the light-gathering structure (21) is positioned on the front surface of the light source (1), the cut-off structure (23) is connected with the light-gathering structure (21), a boundary (231) is formed at the connection position of the cut-off structure (23) and the light-gathering structure (21), the projection surface (22) is positioned on one side of the light-gathering structure (21) far away from the cut-off structure (23), the projection surface (22) is connected with the light-gathering structure (21), the center of the projection surface (22) is provided with a central area, one focus of the light-gathering structure (21) falls into the central area, and the central area is an area S;

the light emitted by the light source (1) irradiates the light-gathering structure (21) and the cut-off structure (23), the light irradiated from the light source (1) onto the light-gathering structure (21) can be projected onto the projection surface (22) under the action of the light-gathering structure (21), and the light emitted from the center of the light source (1) can be gathered in the area S under the action of the light-gathering structure (21);

after being refracted or reflected by the cut-off structure (23), the light rays irradiated from the light source (1) to the cut-off structure (23) are all irradiated to the region except the light-gathering structure (21), the projection surface (22) is a curved surface, and the light rays of the boundary line (231) are collimated by the projection surface (22), so that the light rays emitted out of the projection surface (22) form light distribution with the cut-off line;

a straight line passing through the center point of the projection surface (22) and perpendicular to the normal plane of the projection surface (22) is k, the projection surface (22) is a part of a spherical surface or a part of an aspherical surface which is rotationally symmetrical around the straight line k, and the focus of the projection surface (22) falls below the boundary line (231);

the vertical plane where the straight line k is located is a vertical plane H, the intersection point of the boundary line (231) and the plumb surface H passing through the straight line k is an intersection point P, and the distance from the center of the light source (1) to the intersection point P is 2-8 mm;

the effective focal length of the projection plane (22) is f, the vertical distance between the intersection point P and the straight line k is a, and the relationship between a and f is a = f × tan0.57 °.

2. A thick-walled optical module as claimed in claim 1, wherein: the dividing line (231) is a curved line with a lower left side and a higher right side, so that the light rays exiting the projection surface (22) form a light distribution with a low-beam cut-off line.

3. A thick-walled optical module as claimed in claim 1, wherein: the shape of the boundary line (231) is an arc-shaped curve which is gradually bent upwards from the middle to the two ends, so that the light rays emitted out of the projection surface (22) form light distribution with a fog lamp cut-off line.

4. A thick-walled optical module as claimed in claim 2 or 3, characterized in that: the focal point of the projection surface (22) falls below the boundary line (231).

5. A thick-walled optical module as claimed in claim 1, wherein: the light condensation structure (21) comprises a first curved surface (211), the first curved surface (211) is connected with the cut-off structure (23), the first curved surface (211) is connected with the projection surface (22) through a second curved surface (212), one side, far away from the light source (1), of the first curved surface (211) is the outer side, and the first curved surface (211) is a convex curved surface facing the outer side.

6. A thick-walled optical module as claimed in claim 5, wherein: the first curved surface (211) is a part of an ellipsoidal curved surface or a free-form curved surface.

7. A thick-walled optical module as claimed in claim 5, wherein: the thick-wall element (2) further comprises a light incident surface (24), the light incident surface (24) is located between the light condensation structure (21) and the light source (1), and the light incident surface (24) is a lens.

8. A thick-walled optical module as claimed in claim 7, wherein: the light incident surface (24) is connected with the projection surface (22) through a curved surface III (25).

9. A thick-walled optical module as claimed in claim 8, wherein: microstructures are arranged on the second curved surface (212) and the third curved surface (25).

10. A thick-walled optical module as claimed in claim 1, wherein: the projection surface (22) is a free-form surface, and one of the focal points of the projection surface (22) is located below the boundary (231).

11. A thick-walled optical module as claimed in claim 1, wherein: the surface of the projection surface (22) is provided with a diffraction structure, the diffraction structure is in an annular step shape, and light passing through the projection surface (22) is simultaneously subjected to refraction and diffraction effects, so that dispersion caused by refraction is reduced, sharpness of a cut-off line is improved, and light color of the cut-off line is improved.

12. A thick-walled optical module as claimed in claim 1, wherein: the thick-walled member (2) is made of a transparent resin material.

13. A thick-walled optical module as claimed in claim 7, wherein: after the center of the light source (1) passes through the light incident surface (24), a light source center virtual image is formed between the light incident surface (24) and the light condensing structure (21), and the light source center virtual image is located at the other focus of the light condensing structure (21).

14. A vehicle lamp system characterized in that: a thick-walled optical module comprising the thin-walled optical module according to any one of claims 1 to 13.