Reflection type optical system capable of achieving horizontal large-angle irradiation and vehicle lamp

Abstract

The utility model belongs to the technical field of car lamps, and particularly relates to a reflective optical system and a car lamp capable of achieving horizontal wide-angle irradiation, the reflective optical system comprises a light source and a reflecting unit, the reflecting unit comprises a first reflecting surface and a second reflecting surface which are arranged in an intersecting mode, and the light source is arranged at the intersection point of a first focal line and a second focal line. According to the utility model, the first reflecting surface and the second reflecting surface are arranged in a crossed manner, and a certain included angle is formed between the two reflecting curved surfaces, so that the light utilization efficiency can be improved under the condition of limited opening width, the large-angle projection of light rays is realized, and the first reflecting surface and the second reflecting surface are paraboloids or similar paraboloids, so that the light utilization efficiency is improved. The light can be freely diffused in the horizontal direction by adjusting the shape and the focus position of the paraboloid; and the intersection point obtained by intersection of the focal lines of the respective reflecting surfaces is the position of the light source, so that the design ensures that the light emitted by the light source can realize an ideal projection effect after passing through the reflecting surfaces.

Description

Technical Field

[0001] The utility model relates to the technical field of optical systems, in particular to a reflective optical system and a vehicle lamp capable of realizing horizontal large-angle illumination. Background Art

[0002] In the field of optical technology, reflective optical systems are widely used in various lighting and projection equipment. Traditional reflective optical systems often use free-form surfaces or parabolic reflectors to achieve light projection. However, the light diffusion angle of these reflectors in the left and right directions (i.e., the horizontal direction) is limited by the shape of the reflectors, which makes it difficult to meet the needs of large-angle projection. It is usually necessary to further diffuse the light by adding patterns in the light-emitting direction. But even so, the uniformity of light distribution in the left and right directions of this type of system is still average. Under the limited opening width, it is difficult for traditional reflective optical systems to achieve efficient light utilization, resulting in the final projected illuminance value being less than ideal, which is difficult to meet certain high-demand application scenarios. Utility Model Content

[0003] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art of insufficient horizontal projection angle and uneven horizontal light distribution, the present invention provides a reflective optical system and a headlight that can achieve large horizontal angle illumination, which can achieve larger horizontal angle projection and make light distribution more uniform.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a reflective optical system for realizing horizontal large-angle illumination, which includes: a light source and a reflective unit,

[0005] The reflecting unit includes a first reflecting surface and a second reflecting surface arranged to intersect each other, the first reflecting surface and the second reflecting surface are both parabolic or quasi-parabolic surfaces, the section of the first reflecting surface cut by the horizontal plane is the first section, the section of the second reflecting surface cut by the horizontal plane is the second section, the first reflecting surface forms a first focal line, the first focal line is parallel to the first section and passes through the focus of the first reflecting surface, the second reflecting surface forms a second focal line, the second focal line is parallel to the second section and passes through the focus of the second reflecting surface, the first focal line and the second focal line intersect at point A, and the light source is arranged at point A.

[0006] The specific technical effect is: through the intersecting first and second reflecting surfaces, there is a certain angle between the two reflecting surfaces. This design can improve the light utilization efficiency under a limited opening width and increase the final projected illumination value to achieve large-angle projection of light. The first and second reflecting surfaces are both paraboloids or quasi-paraboloids. By adjusting the shape and focal position of the parabola, the light emitted by the light source can be collimated into parallel light or approximately parallel light in the vertical direction. In the orthogonal direction (i.e., the horizontal direction), the reflecting surface has almost no collimating effect on the light emitted by the light source, so that the light in the horizontal direction still follows the original propagation direction of the light source; the intersection obtained by the intersection of the focal lines of each reflecting surface is the position of the light source. This design ensures that the light emitted by the light source can achieve an ideal projection effect after passing through the reflecting surface.

[0007] Furthermore, an angle α is formed between the first section line and the light emitting direction, an angle β is formed between the second section line and the light emitting direction, and the angle α=the angle β.

[0008] The specific technical effect is that the angle between the first section line or the second section line and the light emitting direction can be adjusted according to actual illumination needs. When the angle α=angle β, the first reflecting surface and the second reflecting surface are symmetrical about the vertical plane where the light emitting direction is located.

[0009] Furthermore, an angle α is formed between the first section line and the light emitting direction, an angle β is formed between the second section line and the light emitting direction, and the angle α≠the angle β.

[0010] The specific technical effect is: when the included angle α≠the included angle β, that is, the first reflecting surface and the second reflecting surface are asymmetric with respect to the vertical plane where the light emitting direction is located.

[0011] Furthermore, the first section line is a straight line or a curve.

[0012] The specific technical effect is: the contour line of the first reflecting surface intercepted by the normal plane of the first section is a parabola. When the first section is a straight line, the first reflecting surface is formed by stretching the parabola along the first section; when the first section is a curve, the first reflecting surface is formed by sweeping the parabola along the first section. The shape of the first reflecting surface is designed according to actual usage requirements. Regardless of whether the first section is a straight line or a curve, it is intended to meet the requirements of large-angle projection in the horizontal direction within a certain opening size.

[0013] Furthermore, the second section line is a straight line or a curve.

[0014] The specific technical effect is: the contour line of the second reflecting surface intercepted by the normal plane of the second section is a parabola. When the second section is a straight line, the second reflecting surface is formed by stretching the parabola along the second section; when the second section is a curve, the second reflecting surface is formed by sweeping the parabola along the second section. The shape of the second reflecting surface is designed according to actual usage requirements. Whether the second section is a straight line or a curve, it is to meet the projection at a large angle in the horizontal direction within a certain opening size.

[0015] Furthermore, it also includes a refraction unit, which is arranged in the light emitting direction of the reflection unit.

[0016] Furthermore, the refraction unit is provided with a diffusion pattern or a grid film.

[0017] The specific technical effect is that the grille film can be either a soft or hard grille film. To further improve the horizontal diffusion angle and uniformity of light, a refraction unit with a diffusion pattern or grille film can be provided in the light-emitting direction of the reflective unit. This refraction unit changes the propagation direction of light, achieving a wider horizontal diffusion angle while maintaining uniform light distribution.

[0018] Furthermore, the reflecting unit also includes a third reflecting surface, which is a parabola or a quasi-parabola, and is arranged at the intersection of the first reflecting surface and the second reflecting surface. The section of the third reflecting surface cut by the horizontal plane is the third section, and the two ends of the third section intersect with the first section and the second section respectively.

[0019] Furthermore, the focal length of the first reflecting surface, the focal length of the second reflecting surface, and the focal length of the third reflecting surface are the same or different from each other.

[0020] The specific technical effect is: the reflective surface can be adjusted according to actual usage requirements.

[0021] A vehicle lamp, comprising a reflective optical system as described in any one of the above items for achieving horizontal large-angle illumination.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] (1) By intersecting the first reflective surface and the second reflective surface, a certain angle is formed between the two reflective curved surfaces. This design can improve the light utilization efficiency under a limited opening width and increase the final projected illumination value to achieve a large-angle projection of light;

[0024] (2) The first reflecting surface and the second reflecting surface are both parabolic or quasi-parabolic surfaces. By adjusting the shape and focal position of the parabolic surface, the light emitted by the light source can be collimated into parallel light or approximately parallel light in the vertical direction. In the orthogonal direction (i.e., the horizontal direction), the reflecting surface has almost no collimating effect on the light emitted by the light source, so that the direction of the light in the horizontal direction is still along the original propagation direction of the light source;

[0025] (3) The intersection point of the focal lines of the respective reflective surfaces is the location of the light source. This design ensures that the light emitted by the light source can achieve the ideal projection effect after passing through the reflective surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a structural diagram of Example 1 of a reflective optical system for achieving horizontal large-angle illumination according to the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of projection in the horizontal plane;

[0029] Figure 3 Schematic diagram of projection in a horizontal plane of embodiment 2 of a reflective optical system for achieving horizontal large-angle illumination according to the present invention;

[0030] Figure 4 Schematic diagram of projection in a horizontal plane of a reflective optical system embodiment 3 for achieving horizontal large-angle illumination according to the present invention;

[0031] Figure 5 This is a structural diagram of Example 4 of a reflective optical system for achieving horizontal large-angle illumination according to the present invention.

[0032] In the figure: 1. Light source;

[0033] 2. Reflection unit; 201. First reflection surface; 202. Second reflection surface; 203. First section line; 204. Second section line; 205. First focal line; 206. Second focal line; 207. Third focal line; 208. Third reflection surface; 209. Third section line;

[0034] 3. Refraction unit; 301. Diffusion pattern. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] like Figures 1 to 2 FIG. 1 is a preferred embodiment of the present invention, which is a reflective optical system for realizing horizontal large-angle illumination, comprising: a light source 1 and a reflective unit 2.

[0039] The reflecting unit 2 includes a first reflecting surface 201 and a second reflecting surface 202 that are intersecting. The first reflecting surface 201 and the second reflecting surface 202 are both parabolic or quasi-parabolic surfaces. The section of the first reflecting surface 201 cut by the horizontal plane is the first section 203, and the section of the second reflecting surface 202 cut by the horizontal plane is the second section 204. The first reflecting surface 201 forms a first focal line 205, which is parallel to the first section 203 and passes through the focus of the first reflecting surface 201. The second reflecting surface 202 forms a second focal line 206, which is parallel to the second section 204 and passes through the focus of the second reflecting surface 202. The first focal line 205 and the second focal line 206 intersect at point A, and the light source 1 is arranged at point A.

[0040] It should be noted here that: the first reflecting surface 201 and the second reflecting surface 202 are arranged to intersect, and a certain angle is formed between the two reflecting curved surfaces. This design can improve the light utilization efficiency under a limited opening width and increase the final projected illuminance value. The first reflecting surface 201 and the second reflecting surface 202 are both paraboloids or quasi-paraboloids. By adjusting the shape and focal position of the parabola, the light emitted by the light source 1 can be collimated into parallel light or approximately parallel light in the vertical direction. In the orthogonal direction (i.e., the horizontal direction), the reflecting surface has almost no collimating effect on the light emitted by the light source 1, so that the light in the horizontal direction still follows the original propagation direction of the light source; the intersection obtained by the intersection of the focal lines of each reflecting surface is the location of the light source 1. This design ensures that the light emitted by the light source 1 can achieve a larger horizontal projection angle after passing through the reflecting surface.

[0041] In this embodiment, an angle α is formed between the first section line 203 and the light emitting direction, and an angle β is formed between the second section line 204 and the light emitting direction, and the angle α=the angle β.

[0042] It should be noted here that the angle between the first section line 203 or the second section line 204 and the light emitting direction can be adjusted according to actual illumination needs. When the angle α=angle β, the first reflecting surface 201 and the second reflecting surface 202 are symmetrical about the vertical plane where the light emitting direction is located.

[0043] In this embodiment, the first section line 203 is a straight line or a curve.

[0044] It should be noted here that the contour line of the first reflecting surface 201 intercepted by the normal plane of the first section 203 is a parabola. According to actual needs, the first section 203 can be a straight line or a curve. When the first section 203 is a straight line, the first reflecting surface 201 is formed by stretching the parabola along the first section 203; when the first section 203 is a curve, the first reflecting surface 201 is formed by sweeping the parabola along the first section 203.

[0045] In this embodiment, the second section line 204 is a straight line or a curve.

[0046] It should be noted here that the contour line of the second reflecting surface 202 intercepted by the normal plane of the second section 204 is a parabola. According to actual needs, the first section 203 can be a straight line or a curve. When the second section 204 is a straight line, the second reflecting surface 202 is formed by stretching the parabola along the second section 204; when the second section 204 is a curve, the second reflecting surface 202 is formed by sweeping the parabola along the second section 204.

[0047] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

[0048] The present invention also has the following implementation methods based on the above:

[0049] Example 2:

[0050] like Figure 3 As shown,

[0051] The difference from Example 1 is that:

[0052] In this embodiment, an angle α is formed between the first section line 203 and the light emitting direction, and an angle β is formed between the second section line 204 and the light emitting direction, and the angle α≠the angle β.

[0053] It should be noted here that: when the included angle α≠the included angle β, the first reflecting surface 201 and the second reflecting surface 202 are asymmetric with respect to the vertical plane where the light emitting direction is located.

[0054] The present invention also has the following implementation methods based on the above:

[0055] Example 3:

[0056] like Figure 4 As shown,

[0057] The difference from Example 1 is that:

[0058] In this embodiment, the reflecting unit 2 also includes a third reflecting surface 208, which is a parabola or a quasi-parabola. The third reflecting surface 208 is arranged at the intersection of the first reflecting surface 201 and the second reflecting surface 202. The section of the third reflecting surface 208 cut by the horizontal plane is a third section 209, and the two ends of the third section 209 intersect with the first section 203 and the second section 204 respectively.

[0059] It should be noted here that the contour line of the third reflecting surface 208 cut by the vertical plane is a parabola, and the parabola is stretched in the horizontal direction to form the third reflecting surface 208. The third reflecting surface 208 forms a third focal line 207, which is parallel to the third section line 209 and passes through the focus of the third reflecting surface 208. The first focal line 205, the second focal line 206 and the third focal line 207 intersect at point A, and the light source 1 is set at point A.

[0060] In this embodiment, the focal length of the first reflective surface 201 , the focal length of the second reflective surface 202 , and the focal length of the third reflective surface 208 are the same or different from each other.

[0061] The present invention also has the following implementation methods based on the above:

[0062] Example 4:

[0063] like Figure 5 As shown,

[0064] The difference from Example 1 is that:

[0065] In this embodiment, a refraction unit 3 is further included, and the refraction unit 3 is arranged in the light emitting direction of the reflection unit 2 .

[0066] In this embodiment, a diffusion pattern 301 is provided on the refraction unit 3 .

[0067] It should be noted here that: in order to further improve the diffusion angle and uniformity of light in the horizontal direction, a refraction unit 3 with a diffusion pattern 301 can be set in the light-emitting direction of the reflection unit 2. The refraction unit 3 changes the propagation direction of the light to achieve a larger angle of diffusion in the horizontal direction while maintaining the uniformity of the light distribution.

[0068] Example 5:

[0069] In this embodiment, the optical system can be composed of multiple groups of light sources 1 and multiple groups of reflection units 2. Each light source 1 cooperates with a reflection unit 2 to form a group of optical units. Multiple optical units can be arranged in sequence along a straight line in the horizontal direction or arranged in a shape according to the shape requirements.

[0070] Example 6:

[0071] A vehicle lamp, comprising a reflective optical system for achieving horizontal large-angle illumination as described in any one of the above embodiments.

[0072] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0073] (1) By intersecting the first reflective surface 201 and the second reflective surface 202, a certain angle is formed between the two reflective curved surfaces. This design can improve the light utilization efficiency under a limited opening width and increase the final projected illumination value, so as to achieve a large-angle projection of light in the horizontal direction;

[0074] (2) The first reflecting surface 201 and the second reflecting surface 202 are both parabolic or quasi-parabolic surfaces. By adjusting the shape and focal position of the parabolic surface, the light emitted by the light source 1 can be collimated into parallel light or approximately parallel light in the vertical direction. In the orthogonal direction (i.e., the horizontal direction), the reflecting surface has almost no collimating effect on the light emitted by the light source 1, thereby allowing the light to diffuse freely in the horizontal direction.

[0075] (3) The intersection point of the focal lines of the respective reflecting surfaces is the location of the light source 1. This design ensures that the light emitted by the light source 1 can achieve an ideal projection effect after passing through the reflecting surface. The horizontal light distribution is mainly achieved by the light distribution of the light source 1 itself and the angle between the reflecting surface and the driving direction. It is relatively uniform and the irradiation angle is very wide.

[0076] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this utility model. The technical scope of this utility model is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A reflective optical system for achieving horizontal large-angle illumination, characterized in that: include: a light source (1) and a reflecting unit (2), The reflecting unit (2) comprises a first reflecting surface (201) and a second reflecting surface (202) arranged to intersect each other, the first reflecting surface (201) and the second reflecting surface (202) are both parabolic or quasi-parabolic surfaces, a section of the first reflecting surface (201) cut by a horizontal plane is a first section (203), a section of the second reflecting surface (202) cut by a horizontal plane is a second section (204), the first reflecting surface (201) forms a first focal line (205), the first focal line (205) is parallel to the first section (203) and passes through the focus of the first reflecting surface (201), the second reflecting surface (202) forms a second focal line (206), the second focal line (206) is parallel to the second section (204) and passes through the focus of the second reflecting surface (202), the first focal line (205) and the second focal line (206) intersect at point A, and the light source (1) is arranged at point A.

2. A reflective optical system for realizing horizontal large-angle illumination according to claim 1, characterized in that: An included angle α is formed between the first section line (203) and the light emitting direction, and an included angle β is formed between the second section line (204) and the light emitting direction, wherein the included angle α=the included angle β.

3. The reflective optical system for realizing horizontal large-angle illumination according to claim 1, characterized in that: An included angle α is formed between the first section line (203) and the light emitting direction, and an included angle β is formed between the second section line (204) and the light emitting direction, wherein the included angle α≠the included angle β.

4. The reflective optical system for realizing horizontal large-angle illumination according to claim 1, wherein: The first section line (203) is a straight line or a curve.

5. The reflective optical system for realizing horizontal large-angle illumination according to claim 1, characterized in that: The second section line (204) is a straight line or a curve.

6. The reflective optical system for realizing horizontal large-angle illumination according to claim 1, characterized in that: It also includes a refraction unit (3), which is arranged in the light-emitting direction of the reflection unit (2).

7. The reflective optical system for realizing horizontal large-angle illumination according to claim 6, characterized in that: The refraction unit (3) is provided with a diffusion pattern (301) or a grid film.

8. The reflective optical system for realizing horizontal large-angle illumination according to claim 1, wherein: The reflection unit (2) further comprises a third reflection surface (208), the third reflection surface (208) being a parabola or a quasi-parabola, the third reflection surface (208) being arranged at the intersection of the first reflection surface (201) and the second reflection surface (202), a section of the third reflection surface (208) cut by a horizontal plane being a third section (209), and two ends of the third section (209) respectively intersecting with the first section (203) and the second section (204).

9. The reflective optical system for realizing horizontal large-angle illumination according to claim 8, characterized in that: The focal length of the first reflecting surface (201), the focal length of the second reflecting surface (202), and the focal length of the third reflecting surface (208) are all the same or different from each other.

10. A vehicle lamp, characterized in that: It comprises a reflective optical system for realizing horizontal large-angle illumination as described in any one of claims 1 to 9.

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