Optical system for realizing large-angle projection and vehicle lamp

Abstract

The utility model belongs to the technical field of optical systems, and particularly relates to an optical system capable of achieving large-angle projection and a car lamp, the optical system capable of achieving large-angle projection comprises a light source, a light collecting part, a reflecting unit and an imaging unit, the imaging unit is arranged in the light emitting direction of the reflection unit, at least one part of the projection contour line of the reflection unit in the vertical plane is a parabola, the focus of the parabola coincides with the focus of the light emitting face of the imaging unit in the vertical plane at a point F, and the projection contour line of the reflection unit in the horizontal plane is a curve or a straight line. According to the utility model, the light collection part is used for collecting the light emitted by the light source and carrying out preliminary shaping, the projection contour line of the reflection unit in the horizontal plane is a straight line or a curve, and a part of large-angle light emitted by the light source is also collected and utilized, so that the large-angle projection is realized, and the effects of improving the lighting effect and realizing more uniform observation by human eyes are achieved.

Description

Technical Field

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

[0002] Corner fog lights are widely used in automobiles, ships, and other vehicles to enhance driving safety in low-visibility conditions such as fog, rain, and snow. Typically mounted at the front of a vehicle near the headlights, they produce a broad, low-profile beam that reduces reflections within the geometric beam, thereby enhancing illumination of the road and surrounding environment.

[0003] The commonly used optical system for corner fog lamps is imaging unit + light source, that is, the light source is directly imaged. This solution has low light efficiency, especially when the vertical size is small; and when this design solution is used, when the human eye observes the lamp, the lighting is uneven. Utility Model Content

[0004] In view of this, in order to solve the problems existing in the prior art, the purpose of the present invention is to provide an optical system and a headlight that can achieve large-angle projection, with higher light efficiency and more uniform observation effect by the human eye.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An optical system for achieving wide-angle projection, comprising: a light source, a light collecting unit, a reflecting unit, and an imaging unit. The light collecting unit is configured to collect and preliminarily shape the light emitted by the light source. The reflecting unit converges the light output by the light collecting unit near point F in a vertical plane. The imaging unit is disposed in the light emitting direction of the reflecting unit.

[0007] At least a portion of the projection contour of the reflecting unit in the vertical plane is a parabola, the focus of the parabola coincides with the focus of the light emitting surface of the imaging unit in the vertical plane at the point F, and the projection contour of the reflecting unit in the horizontal plane is a straight line or a curve.

[0008] The specific technical effect is: a light collecting part is set up to collect the light emitted by the light source and perform preliminary shaping. The preliminary shaping refers to collimating the light emitted by the light source into parallel light or approximately parallel light, or emitting it at a certain diffusion angle. The reflecting unit converges part of the light from the light collecting part in the vertical plane near the point F area. At least a part of the projection contour line of the reflecting unit in the vertical plane is a parabola. The focus of the parabola and the focus of the light-emitting surface of the imaging unit in the vertical plane coincide at point F, so that there is a certain angle between the light and the light-emitting direction, thereby achieving a more uniform lighting effect in the horizontal direction compared to the traditional optical system. The projection contour line of the reflecting unit in the horizontal plane is a straight line or a curve, and a part of the large-angle light emitted by the light source is also collected and utilized, realizing large-angle projection, which has the effect of improving light efficiency.

[0009] Furthermore, the light collecting portion includes a plurality of collimating units, and the plurality of collimating units are arranged in a horizontal direction, and the plurality of collimating units are arranged along a straight line projection contour line of the reflecting unit in a horizontal plane.

[0010] The specific technical effect is: a number of collimating units are arranged along the horizontal direction to collect the light emitted by the light source, and collimate the light emitted by the light source into parallel light or approximately parallel light, or emit it at a certain diffusion angle; when the projection contour line of the reflecting unit in the horizontal plane is a straight line, the reflecting unit is formed by stretching the projection contour line in the vertical plane along the straight line. This structure is simple to manufacture, and the light path does not change after reflection, which is convenient for light path design.

[0011] Furthermore, the light collecting portion includes a plurality of collimating units, and the plurality of collimating units are arranged along a curved projection contour line of the reflecting unit in a horizontal plane.

[0012] The specific technical effect is that when the projection contour line of the reflective unit in the horizontal plane is a curve, the reflective unit is formed by sweeping the projection contour line in the vertical plane along the curve. This structure can realize complex optical functions.

[0013] Furthermore, when the projection contour line of the reflection unit in the horizontal plane is a curve, at least a part of the curve is an arc segment.

[0014] The specific technical effect is: any continuous line is called a curve, which includes straight lines, broken lines, line segments, arc segments, etc., and can be designed according to actual needs.

[0015] Furthermore, the reflection unit is formed by rotating a projection contour line of the reflection unit in a vertical plane around a vertical rotation axis perpendicular to the light emitting direction.

[0016] The specific technical effect is: the reflecting unit is formed by rotating the projection contour line in the vertical plane with the vertical rotation axis perpendicular to the light emitting direction as the rotation axis, and a part of the large-angle light emitted by the light source is also collected and utilized, thereby realizing large-angle illumination. Compared with the design of the straight line projection contour line of the reflecting unit in the horizontal plane, it has the effect of improving the lighting efficiency.

[0017] Furthermore, it also includes a connecting part, which includes a total reflection unit. The total reflection unit is located between the light collecting part and the imaging unit, and the focus of the imaging unit is located on an end surface of the total reflection unit close to the imaging unit.

[0018] The specific technical effect is: by setting a total reflection unit, and the focus of the imaging unit is located on one end face of the total reflection unit close to the imaging unit, the emitted light can form a light and dark boundary. For example, functional lights such as corner lights, fog lights or low beam assist that need to have a light and dark boundary can be equipped with a total reflection unit; and since the surface light source has a certain size in actual applications, the light emitted by the surface light source is reflected by the reflection unit and converges at point F or an area close to point F, and the light reflected to the area close to point F can also be emitted from the imaging unit after total reflection by the total reflection unit, further improving the light efficiency.

[0019] Furthermore, the light collecting portion, the reflecting unit, the imaging unit and the connecting portion are integrally connected.

[0020] The specific technical effect is that it can be connected as one piece or as a split piece, and the lighting efficiency of the one piece is higher than that of the split piece.

[0021] Furthermore, a vertical stripe pattern is provided on the surface of the reflective unit.

[0022] The specific technical effect is that the vertical stripe pattern has a light diffusion function, and the vertical stripe pattern is formed along the contour line array of the reflective unit on the horizontal plane.

[0023] Furthermore, the projection of the light emitting surface of the imaging unit in the vertical plane is a curve or a straight line.

[0024] A vehicle lamp, comprising an optical system for achieving wide-angle projection as described in any one of the above items.

[0025] The beneficial effects of the utility model are:

[0026] (1) A light collecting portion is provided to collect the light emitted by the light source, and the light emitted by the light source is initially collimated into parallel light or approximately parallel light, or emitted at a certain diffusion angle. The reflecting unit converges part of the light from the light collecting portion in the vicinity of the point F in the vertical plane. At least a part of the projection contour line of the reflecting unit in the vertical plane is a parabola, and the focus of the parabola and the focus of the light emitting surface of the imaging unit in the vertical plane are arranged to coincide with the point F, so that there is a certain angle between the light and the light emitting direction, thereby achieving a more uniform lighting effect in the horizontal direction compared with the solution of the traditional optical system;

[0027] (2) The projection contour line of the reflective unit in the horizontal plane is a straight line or a curve, and a part of the large-angle light emitted by the light source is also collected and utilized, thereby realizing large-angle projection and improving the light efficiency.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0031] Figure 2 is a schematic structural diagram of a reflection unit in an implementation form of Example 1;

[0032] Figure 3 This is a schematic structural diagram of Example 2 of the present utility model;

[0033] Figure 4 yes Figure 3 Schematic diagram of the structure in the vertical plane;

[0034] Figure 5 yes Figure 4 Schematic diagram of the optical path in the vertical plane;

[0035] Figure 6 This is a schematic structural diagram of Example 3 of the present utility model;

[0036] Figure 7 Light pattern diagram of the optical system of the present utility model.

[0037] In the picture:

[0038] 1. Light source; 2. Light collecting unit; 3. Reflection unit; 4. Imaging unit; 5. Collimation unit; 6. Total reflection unit; 7. First connecting unit; 8. Second connecting unit; 9. Vertical stripe pattern. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] An optical system for achieving wide-angle projection, comprising: a light source 1, a light collecting unit 2, a reflecting unit 3, and an imaging unit 4. The light collecting unit 2 is configured to collect light emitted by the light source 1 and initially collimate the light emitted by the light source 1 into parallel light or nearly parallel light, or emit the light at a certain diffusion angle. The reflecting unit 3 converges part of the light output by the light collecting unit 2 near a point F in a vertical plane. The imaging unit 4 is disposed in the light-emitting direction of the reflecting unit 3.

[0041] At least a portion of the projection contour line of the reflecting unit 3 in the vertical plane is a parabola, the projection of the light-emitting surface of the imaging unit 4 in the vertical plane is a straight line or a curve, the focus of the parabola coincides with the focus of the curve at point F, and the projection contour line of the reflecting unit 3 in the horizontal plane is a straight line or a curve.

[0042] It should be noted here that: by setting a light collecting portion 2 for collecting the light emitted by the light source 1, and preliminarily collimating the light emitted by the light source 1 into parallel light or approximately parallel light, or emitting at a certain diffusion angle, the reflecting unit 3 converges part of the light from the light collecting portion 2 in the vertical plane near the point F area, and at least a part of the projection contour line of the reflecting unit 3 in the vertical plane is a parabola, and the focus of the parabola and the focus of the light emitting surface of the imaging unit 4 in the vertical plane are arranged to coincide at point F, so that there is a certain angle between the light and the light emitting direction, thereby achieving a more uniform lighting effect in the horizontal direction compared to the solution of the traditional optical system; the projection contour line of the reflecting unit 3 in the horizontal plane is a straight line or a curve, and a part of the large-angle light emitted by the light source 1 is also collected and utilized, realizing large-angle projection, which has the effect of improving light efficiency. The optical system of the present utility model is suitable for narrow and long car lamp shapes.

[0043] As an embodiment of the present invention, when the projection contour line of the reflecting unit 3 in the horizontal plane is a straight line, the light collecting part 2 includes a plurality of collimating units 5, and the plurality of collimating units 5 are arranged in the horizontal direction, and the plurality of collimating units 5 are arranged along the straight projection contour line of the reflecting unit 3 in the horizontal plane.

[0044] It should be noted here that: a number of collimating units 5 are arranged along the horizontal direction, and the light collecting part 2 is used to collect the light emitted by the light source 1, and preliminarily collimate the light emitted by the light source 1 into parallel light or approximately parallel light, or emit it at a certain diffusion angle, and when the projection contour line of the reflecting unit 3 in the horizontal plane is a straight line, the reflecting unit 3 is formed by stretching the projection contour line in the vertical plane along the straight line. This structure is simple to manufacture, and the light path does not change after reflection, which is convenient for light path design.

[0045] The light collecting unit 2 can be any optical unit such as a condenser, a lens or a reflector that can realize collimation or emit light at a certain diffusion angle.

[0046] Example 1:

[0047] The light collecting portion 2 includes a plurality of collimating units 5 , and the plurality of collimating units 5 are arranged along the curved projection contour line of the reflecting unit 3 in the horizontal plane.

[0048] It should be noted here that: when the projection contour line of the reflective unit 3 in the horizontal plane is a curve, the reflective unit 3 is formed by the projection contour line in the vertical plane sweeping along the curve.

[0049] like Figure 1 As shown, as an implementation form of this embodiment, when the projection contour line of the reflection unit 3 in the horizontal plane is a curve, at least a part of the curve is an arc segment.

[0050] It should be noted here that any continuous line is called a curve, which includes straight lines, broken lines, line segments, arc segments, etc., and can be designed according to actual needs.

[0051] like Figure 2 As shown in FIG. 1 , as an implementation form of this embodiment, the reflecting unit 3 is formed by rotating a projection contour line of the reflecting unit 3 in a vertical plane around a vertical rotation axis perpendicular to the light emitting direction.

[0052] It should be noted here that the reflecting unit 3 is formed by rotating the projection contour line in the vertical plane with the vertical rotation axis perpendicular to the light emitting direction as the rotation axis, and a part of the large-angle light emitted by the light source 1 is also collected and utilized. Compared with the design of the straight line projection contour line of the reflecting unit 3 in the horizontal plane, it has the effect of improving the lighting effect.

[0053] The optical path principle of this embodiment is as follows:

[0054] The light emitted by the light source 1 is initially shaped by the light collecting part 2, and the reflecting unit 3 converges part of the light from the light collecting part 2 at point F or the front and rear areas near point F in the vertical plane, and continues to be emitted to the imaging unit 4, and is refracted by the imaging unit 4 and then emitted.

[0055] 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.

[0056] The present invention also has the following implementation methods based on the above:

[0057] Example 2:

[0058] like Figures 3 to 5 As shown,

[0059] The difference from Example 1 is that it also includes a connecting part, which includes a total reflection unit 6. The total reflection unit 6 is located between the light collecting part 2 and the imaging unit 4, and the focus of the imaging unit 4 is located on one end surface of the total reflection unit 6 close to the imaging unit 4.

[0060] It should be noted here that: by setting up a total reflection unit 6, and the focus of the imaging unit 4 is located on one end face of the total reflection unit 6 close to the imaging unit 4, the emitted light can form a light and dark boundary. For example, functional lights such as corner lights, fog lights or low beam assist that require a light and dark boundary can be equipped with a total reflection unit 6; and since the surface light source 1 has a certain size in actual applications, the light emitted by the surface light source 1 is reflected by the reflection unit 3 and converges at point F or in an area close to point F. Part of the light is reflected by the reflection unit 3 to the total reflection unit 6 and then reflected to the imaging unit 4, and then refracted and emitted, further improving the light efficiency.

[0061] The contour of one end of the total reflection unit 6 close to the imaging unit 4 is consistent with the contour of the reflection unit 3 in the horizontal plane. This is done to ensure a relatively horizontal light-dark cutoff line.

[0062] The connecting part also includes a first connecting unit 7 and a second connecting unit 8. The end of the total reflection unit 6 close to the light collecting part 2 is connected to the light collecting part 2 through the first connecting unit 7, and the end of the total reflection unit 6 close to the imaging unit 4 is connected to the imaging unit 4 through the second connecting unit 8.

[0063] The light collecting portion 2 , the reflecting unit 3 , the imaging unit 4 and the connecting portion are integrally connected.

[0064] It should be noted here that the integrated connection into a single piece reduces the number of times the light source 1 passes through the refractive layer from incident to emitted, thereby improving light efficiency, compared with separate pieces.

[0065] The optical path principle of this embodiment is as follows:

[0066] The light emitted by the light source 1 is initially shaped by the light collecting part 2, and the reflecting unit 3 converges the light from the light collecting part 2 at point F or an area close to point F in the vertical plane. The light converged at point F continues to be emitted toward the imaging unit 4, and is refracted by the imaging unit 4 and then emitted. Part of the light is reflected by the reflecting unit 3 to the total reflection unit 6, and then reflected to the imaging unit 4, and then refracted and emitted.

[0067] The present invention also has the following implementation methods based on the above:

[0068] Example 3:

[0069] like Figure 6 As shown,

[0070] The difference from Example 2 is that:

[0071] The reflecting unit 3 is provided with a vertical stripe pattern 9, such as Figure 7 As shown, the vertical stripe pattern has a light diffusion function. The vertical stripe pattern is formed along the contour line array of the reflective unit on the horizontal plane, so that the emitted light is diffused more widely in the left and right directions, achieving a large-angle projection.

[0072] A vehicle lamp, comprising any one of the above optical systems for achieving wide-angle projection.

[0073] In summary, the beneficial effects of the present invention are:

[0074] (1) The light emitted by the light source 1 is initially shaped by the light collecting portion 2, and the reflecting unit 3 converges part of the light from the light collecting portion 2 in the vertical plane near the point F area. At least a part of the projection contour line of the reflecting unit 3 in the vertical plane is a parabola, and the focus of the parabola and the focus of the light emitting surface of the imaging unit 4 in the vertical plane are arranged to coincide with the point F, so that there is a certain angle between the light and the light emitting direction, thereby achieving a more uniform lighting effect in the horizontal direction compared with the solution of the traditional optical system;

[0075] (2) The projection contour line of the reflecting unit 3 in the horizontal plane is a straight line or a curve, and a part of the large-angle light emitted by the light source 1 is also collected and utilized, realizing large-angle projection and improving the light efficiency. The optical system of the utility model is suitable for narrow and long car lamp shapes.

[0076] The various devices selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0077] In the description of the embodiments of the present invention, unless otherwise 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 or electrical connections; direct connections or 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 the present invention based on the specific circumstances.

[0078] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0079] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An optical system for achieving large-angle projection, characterized in that: include: A light source (1), a light collecting portion (2), a reflecting unit (3) and an imaging unit (4), wherein the light collecting portion (2) is used to collect light emitted by the light source (1) and perform preliminary shaping, the reflecting unit (3) converges part of the light output by the light collecting portion (2) near a point F area in a vertical plane, and the imaging unit (4) is arranged in the light emitting direction of the reflecting unit (3); At least a portion of the projection contour line of the reflecting unit (3) in the vertical plane is a parabola, the focus of the parabola coincides with the focus of the light-emitting surface of the imaging unit (4) in the vertical plane at the point F, and the projection contour line of the reflecting unit (3) in the horizontal plane is a straight line or a curve.

2. An optical system for achieving large-angle projection as claimed in claim 1, characterized in that: The light collecting portion (2) comprises a plurality of collimating units (5), the plurality of collimating units (5) being arranged in a horizontal direction, and the plurality of collimating units (5) being arranged along a straight line projection contour line of the reflecting unit (3) in a horizontal plane.

3. An optical system for achieving large-angle projection as claimed in claim 1, characterized in that: The light collecting portion (2) comprises a plurality of collimating units (5), and the plurality of collimating units (5) are arranged along the curved projection contour line of the reflecting unit (3) in the horizontal plane.

4. The optical system for achieving large-angle projection as claimed in claim 1, characterized in that: When the projection contour line of the reflection unit (3) in the horizontal plane is a curve, at least a part of the curve is a circular arc segment.

5. The optical system for achieving large-angle projection as claimed in claim 1, characterized in that: The reflection unit (3) is formed by rotating a projection contour line of the reflection unit (3) in a vertical plane around a vertical rotation axis perpendicular to the light emitting direction.

6. The optical system for achieving large-angle projection as claimed in claim 1, characterized in that: The invention also includes a connecting portion, wherein the connecting portion includes a total reflection unit (6), the total reflection unit (6) is located between the light collecting portion (2) and the imaging unit (4), and the focus of the imaging unit (4) is located on an end surface of the total reflection unit (6) close to the imaging unit (4).

7. An optical system for achieving large-angle projection as claimed in claim 6, characterized in that: The light collecting portion (2), the reflecting unit (3), the imaging unit (4) and the connecting portion are integrally connected.

8. The optical system for achieving large-angle projection as claimed in claim 1, characterized in that: A vertical stripe pattern (9) is provided on the surface of the reflective unit (3).

9. The optical system for achieving large-angle projection as claimed in claim 1, characterized in that: The projection of the light-emitting surface of the imaging unit (4) in the vertical plane is a curve or a straight line.

10. A vehicle lamp, characterized in that: The invention comprises an optical system for realizing large-angle projection as described in any one of claims 1 to 9.

Images