CN114719222A - Lens subassembly, car light module, car light and vehicle - Google Patents

Lens subassembly, car light module, car light and vehicle Download PDF

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Publication number
CN114719222A
CN114719222A CN202110013520.6A CN202110013520A CN114719222A CN 114719222 A CN114719222 A CN 114719222A CN 202110013520 A CN202110013520 A CN 202110013520A CN 114719222 A CN114719222 A CN 114719222A
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China
Prior art keywords
lens
light
light incident
plane
entrance
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CN202110013520.6A
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Chinese (zh)
Inventor
牛磊
杨珏晶
黄慧
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HASCO Vision Technology Co Ltd
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HASCO Vision Technology Co Ltd
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Priority to CN202110013520.6A priority Critical patent/CN114719222A/en
Publication of CN114719222A publication Critical patent/CN114719222A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Abstract

The invention relates to an optical element and discloses a lens assembly which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in sequence; the first lens is a concave lens, the second lens is a convex lens, and the lens light incident surface and the lens light emergent surface of the third lens are rotational symmetry surfaces; the lens light incident surface of the fourth lens and the lens light incident surface of the fifth lens are both curved surfaces which are recessed towards the respective light emergent surfaces, the lens light emergent surface of the fourth lens is a curved surface which is recessed towards the lens light incident surface, and the curvature of the lens light incident surfaces of the fourth lens and the fifth lens is different between the meridian plane and the sagittal plane, so that the magnification of the lens component in the meridian plane is smaller than that in the sagittal plane. The invention also discloses a car lamp module, a car lamp and a car. The lens assembly can compress the visual angle in the up-down direction, so that the visual angle requirements of meridian planes and sagittal planes of roads are met, and the illumination in the effective illumination range of the road surface is improved.

Description

Lens subassembly, car light module, car light and vehicle
Technical Field
The present invention relates to optical elements, in particular, to a lens assembly. In addition, the invention also relates to a car lamp module, a car lamp and a car.
Background
With the development of the automobile lamp industry, the single road lighting is difficult to meet the requirements of traffic participants on safe and comfortable lighting, and the requirements of human-vehicle interaction and human-human interaction information are higher and higher. The novel intelligent car lamp system capable of realizing matrix type illumination and pixel display is gradually applied to the car.
The existing solution has a high-pixel MATRIX module scheme based on DLP or LCD, the resolution angle of the high-pixel MATRIX module scheme is very small, continuously-changing pixel illumination can be realized, softer light type change can be provided, different road conditions are combined, and high-pixel illumination and display are realized simultaneously. In addition, the technical scheme is that the illumination space of the whole headlamp is continuously divided into different blocks, and each block realizes pixel illumination and display by the array LEDs with different numbers. However, in any display module, the size ratio of the display unit in the display unit is limited to a certain extent, and the display unit has access to the actual road lighting ratio, so that the pixel resolution angle is low, the overall illumination is low, and the requirements of automobile road lighting and display cannot be completely met.
Disclosure of Invention
The technical problem to be solved by the invention in the first aspect is to provide a lens assembly, which can compress the viewing angle in the up-down direction, thereby meeting the viewing angle requirements of meridian plane and sagittal plane of the road and improving the illumination within the effective illumination range of the road surface.
The invention provides a vehicle lamp module, which can compress the viewing angle in the vertical direction, thereby effectively utilizing the pixel size of the display unit, meeting the viewing angle requirements of meridian plane and sagittal plane of the road, and improving the illumination within the effective illumination range of the road surface.
A third aspect of the present invention is to provide a vehicle lamp, which can compress the viewing angle in the vertical direction, thereby effectively utilizing the pixel size of the display unit, and at the same time, can satisfy the viewing angle requirements of the meridian plane and the sagittal plane of the road, and improve the illumination within the effective illumination range of the road surface.
A third aspect of the present invention is to provide a vehicle lamp capable of compressing a viewing angle in a vertical direction, thereby effectively utilizing a pixel size of a display unit, satisfying a viewing angle requirement of a meridian plane and a sagittal plane of a road, improving illuminance within an effective illumination range of a road surface, and reducing a volume.
In order to solve the above technical problem, a first aspect of the present invention provides a lens assembly, including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially disposed;
the first lens is a concave lens, the second lens is a convex lens, and a lens light-emitting surface of the first lens is attached to a lens light-in surface of the second lens;
the lens light incident surface and the lens light emergent surface of the third lens are both rotationally symmetrical surfaces;
the fourth lens and the fifth lens are anamorphic lenses, the lens light-in surface of the fourth lens and the lens light-in surface of the fifth lens are curved surfaces which are recessed towards the respective light-out surfaces, the lens light-out surface of the fourth lens is a curved surface which is recessed towards the lens light-in surface of the fourth lens, and the lens light-in surface of the fourth lens and the lens light-in surface of the fifth lens are both set to have different curvatures in a meridian plane and a sagittal plane, so that the magnification of the combination of the first lens, the second lens, the third lens, the fourth lens and the fifth lens in the meridian plane is smaller than that in the sagittal plane.
Preferably, the lens light incident surface and the lens light emergent surface of the first lens can be matched with a spherical surface;
the lens light incident surface and the lens light emergent surface of the second lens are spherical surfaces.
Preferably, the lens light incident surface and the lens light emergent surface of the third lens are respectively one of a spherical surface, a quadric surface and an even aspheric surface.
Preferably, the lens light-emitting surface of the fourth lens and the lens light-emitting surface of the fifth lens are both rotational symmetry surfaces.
Further preferably, a lens light-emitting surface of the fourth lens is a quadric surface or matched with an even aspheric surface;
and the lens light-emitting surface of the fifth lens is a quadric surface or an even aspheric surface.
More preferably, a lens light-emitting surface of the fourth lens is matched with an even-order aspheric surface; the lens light-emitting surface of the fifth lens is an even-order aspheric surface;
the surface type equation of the lens light-emitting surface of the fourth lens and the lens light-emitting surface of the fifth lens is as follows:
Figure BDA0002886073110000031
wherein Z is the plane rise, c is the curvature, k is the coefficient of the quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8The coefficients of the high-order terms of the surface shapes are provided.
Typically, the lens light incident surface of the fourth lens and the lens light incident surface of the fifth lens are both free-form surfaces;
the surface type equation of the lens light incident surface of the fourth lens and the lens light incident surface of the fifth lens is as follows:
Figure BDA0002886073110000032
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients of the quadric surfaces in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are the coefficients of aspheric high-order terms respectively.
Further preferably, the first lens and the second lens are both glass molded pieces;
the third lens, the fourth lens and the fifth lens are respectively a glass molded piece or a light-transmitting plastic molded piece.
In a second aspect, the present invention provides a vehicle lamp module, which includes a display unit and the lens assembly according to any one of the above technical solutions, wherein the lens assembly is disposed in a light emitting direction of the display unit.
In a third aspect, the present invention provides a vehicle lamp, which includes the vehicle lamp module set of the second aspect.
In a fourth aspect, the present invention provides a vehicle comprising a vehicle light according to the third aspect.
Through the technical scheme, the lens assembly provided by the invention has the advantages that the lens light incident surface of the fourth lens and the lens light incident surface of the fifth lens are set to have different curvatures in a meridian plane and a sagittal plane, so that the magnification of the combination of the first lens, the second lens, the third lens, the fourth lens and the fifth lens in the meridian plane is smaller than that in the sagittal plane, the focal length of the lens module in the horizontal direction is larger than that in the vertical direction, and a horizontal-direction field angle larger than that in the vertical direction can be obtained. For effective DMD pixels, the image plane can be compressed within a certain field angle, so that the improvement of the resolution during road illumination display can be ensured, excessive energy waste is avoided, and the road surface illumination is improved.
Further advantages of the present invention, as well as technical effects of preferred embodiments, are further described in the following detailed description.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a vehicular lamp module according to the present invention;
FIG. 2 is a schematic view of a sagittal projection of one embodiment of the vehicle lamp module of the present invention;
FIG. 3 is a schematic view of a projection of one embodiment of the vehicle lamp module of the present invention onto a meridian plane;
FIG. 4 is a schematic diagram of the structures of a fourth lens and a fifth lens in an embodiment of the invention;
FIG. 5 is an isometric view of one embodiment of the vehicle light module of the present invention;
FIG. 6 is a schematic view of a sagittal projection of another embodiment of the vehicle lamp module of the present invention;
fig. 7 is a schematic projection view of another embodiment of the vehicle lamp module of the present invention on a meridian plane.
Description of the reference numerals
1 first lens 2 second lens
3 third lens 4 fourth lens
5 fifth lens 6 display unit
7 image plane
11 first lens, lens entrance surface 12 first lens, and lens exit surface
21 lens light-in surface of second lens and 22 lens light-out surface of second lens
31 lens light-in surface of third lens, 32 lens light-out surface of third lens
41 lens entrance surface of fourth lens, 42 lens exit surface of fourth lens
51 lens light incident surface of fifth lens 52 lens light emergent surface of fifth lens
61 digital micromirror 62 digital micromirror window
621 digital micromirror window light-in surface 622 digital micromirror window light-out surface
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It is to be understood that the terms "upper," "lower," "front," "back," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus are not to be considered limiting of the present invention. As shown in fig. 1 and 5, the z-axis refers to the optical axis of the optical system, the y-axis refers to the principal ray of the off-axis object point (vertically upward), the straight line perpendicular to both the z-axis and the y-axis and passing through the origin is the x-axis, and the meridian plane refers to the plane formed by the principal ray of the off-axis object point and the principal axis of the optical system, that is, the plane formed by the z-axis and the y-axis; the sagittal plane refers to a plane perpendicular to the meridian plane, i.e., a plane formed by the x-axis and the z-axis. More specifically, the y-axis is directed "up", the z-axis is directed "front", and the x-axis is directed "right".
In a basic embodiment of the present invention, as shown in fig. 1 to 3, the present invention provides a lens assembly including a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, and a fifth lens 5, which are sequentially disposed; the first lens 1 is a concave lens, the second lens 2 is a convex lens, and the lens light-emitting surface 12 of the first lens 1 is attached to the lens light-in surface 21 of the second lens 2; the lens light incident surface 31 and the lens light emitting surface 32 of the third lens 3 are both rotational symmetry surfaces; the fourth lens 4 and the fifth lens 5 are anamorphic lenses, the lens light incident surface 41 of the fourth lens 4 and the lens light incident surface 51 of the fifth lens 5 are curved surfaces which are recessed toward the respective light exit surfaces, the lens light exit surface 42 of the fourth lens 4 is a curved surface which is recessed toward the lens light incident surface 41 of the fourth lens 4, and the lens light incident surface 41 of the fourth lens 4 and the lens light incident surface 51 of the fifth lens 5 are both set such that the curvature in the meridian plane (y, z) and the curvature in the sagittal plane (x, z) are different from each other, so that the magnification in the meridian plane (y, z) of the combination of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, and the fifth lens 5 is smaller than the magnification in the sagittal plane (x, z).
According to the present invention, the curvatures of the portions of the lens exit surface 12 of the first lens 1 and the curvatures of the portions of the lens entrance surface 21 of the second lens 2 are equal to each other in a one-to-one correspondence, so that the lens exit surface 12 of the first lens 1 and the lens entrance surface 21 of the second lens 2 are attached to each other. The first lens 1 and the second lens 2 can form an achromatic doublet or a double-split lens.
An anamorphic lens refers to a lens that is shaped differently from conventional convex lenses as well as concave lenses. Specifically, the anamorphic lens is a lens in which at least one of the lens light incident surface and the lens light exiting surface is a free-form surface. The lens light incident surface or the lens light emergent surface which is not set as the free curved surface can be set as an aspheric surface or a quadric surface. The free-form surface is a surface that is not rotationally symmetric about a center, and may be symmetric along a certain cross section, may be symmetric about a certain axis, or may have no axis or plane of symmetry.
The curvature of the lens entrance surface 41 of the fourth lens 4 and the curvature of the lens entrance surface 51 of the fifth lens 5 on the yoz plane are different from each other, and the curvature of the lens entrance surface 41 of the fourth lens 4 and the curvature of the lens entrance surface 51 of the fifth lens 5 on the xoz plane are different from each other. The lens light emitting surface 42 of the fourth lens 4 is a concave curved surface facing the lens light incident surface 41 of the fourth lens 4, and the lens light emitting surface 52 of the fifth lens 5 is a convex curved surface facing away from the lens light incident surface 51 of the fifth lens 5.
In operation of the lens assembly provided in the above basic embodiment, as shown in fig. 2, the light ray r11 emitted from the edge pixel of the display unit 6 is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 to become the emergent light ray r 12. The other edge pixel of the display unit 6 emits a light ray r21, which is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 to be an emergent light ray r 22. The included angle between the emergent ray r12 and the emergent ray r22 is the sagittal included angle of the lens module. As shown in fig. 3, the light ray r31 emitted from the edge pixel of the display unit 6 is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 to be an emergent light ray r 32. The other edge pixel of the display unit 6 emits a light ray r41, which is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 to be an emergent light ray r 42. The included angle between the emergent ray r32 and the emergent ray r42 is the included angle of the meridian plane of the lens module, and the curvature of the sagittal plane of the lens module is different from that of the meridian plane, so the magnification of the sagittal plane is different from that of the meridian plane.
The lens assembly provided by the above-described basic embodiment is configured such that the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5 are set to have different curvatures in the meridional plane (y, z) and the sagittal plane (x, z), and when the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, and the fifth lens 5 are combined, the focal length in the horizontal direction can be reduced, and a larger angle of view with respect to the vertical direction can be obtained. Meanwhile, the focal length of the LED light source in the vertical direction can be increased, effective pixels in the vertical direction can be compressed in a certain view field, the resolution ratio during road illumination display can be improved, excessive energy waste is avoided, and the road surface illumination is improved. And the lens combination with different compression ratios can meet the visual requirements of meridian planes (y, z) and sagittal planes (x, z) of road illumination, and the illumination in the effective illumination range of the road surface is improved. Moreover, by arranging the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5 to have different curvatures in the meridional plane (y, z) and the sagittal plane (x, z), the fourth lens 4 and the fifth lens 5 can have different powers, and the lens assembly can have different magnifications in the meridional plane (y, z) and the sagittal plane (x, z). Thereby meeting the requirements of different magnifications in two directions.
In one embodiment of the present invention, the lens light incident surface 11 and the lens light exiting surface 12 of the first lens 1 can be matched with a spherical surface; the lens light incident surface 21 and the lens light emitting surface 22 of the second lens 2 are both spherical surfaces. The lens light incident surface 11 and the lens light emitting surface 12 of the first lens 1 and the lens light incident surface 21 and the lens light emitting surface 22 of the second lens 2 are both spherical surfaces, so that the processing of the two lenses can be facilitated, and the first lens 1 and the second lens 2 can be attached more tightly on the basis of ensuring the magnification.
Specifically, both the lens light incident surface 11 and the lens light exiting surface 12 of the first lens 1 can be attached to a spherical surface, that is, the curvatures of the lens light incident surface 11 and the lens light exiting surface 12 of the first lens 1 are consistent with the spherical surface.
The lens light incident surface 31 and the lens light emitting surface 32 of the third lens 3 may be any curved surfaces that can form rotational symmetry. In an embodiment of the present invention, the lens light incident surface 31 and the lens light emitting surface 32 of the third lens element 3 are each one of a spherical surface, a quadratic surface and an even aspheric surface. The positioning position of the optical center can be found when the third lens 3 is processed, and meanwhile, the lens assembly can be conveniently installed.
In an embodiment of the present invention, as shown in fig. 4, the lens light emitting surface 42 of the fourth lens 4 and the lens light emitting surface 52 of the fifth lens 5 are both rotational symmetry surfaces. The positioning position of the optical center can be found when the fourth lens 4 and the fifth lens 5 are processed, so that the fourth lens 4 and the fifth lens 5 can be conveniently processed, and the lens assembly can be conveniently installed.
The lens light-emitting surface 42 of the fourth lens 4 and the lens light-emitting surface 52 of the fifth lens 5 may be any curved surfaces that can form rotational symmetry. In one embodiment of the present invention, the lens light emitting surface 42 of the fourth lens element 4 is a quadric surface or matched with an even aspheric surface; the lens light emitting surface 52 of the fifth lens element is a quadric surface or an even aspheric surface. The positioning position of the optical center can be further conveniently found when the fourth lens 4 and the fifth lens 5 are processed, so that the fourth lens 4 and the fifth lens 5 are conveniently processed, and the lens assembly can be further conveniently mounted.
Specifically, the lens light emitting surface 41 of the fourth lens element 4 is a quadratic surface or can be bonded to an even aspheric surface.
In order to further facilitate finding the positioning position of the optical center when the fourth lens 4 and the fifth lens 5 are processed, the fourth lens 4 and the fifth lens 5 are processed conveniently. In one embodiment of the present invention, the lens light-emitting surface 42 of the fourth lens element 4 is matched with an even aspheric surface; the lens light-emitting surface 52 of the fifth lens 5 is an even-order aspheric surface; the surface type equations of the lens light-emitting surface 42 of the fourth lens element 4 and the lens light-emitting surface 52 of the fifth lens element 5 are:
Figure BDA0002886073110000091
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of the quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8Respectively, the coefficients of the high-order terms of the surface type.
In order to further facilitate finding the positioning position of the optical center when the fourth lens 4 and the fifth lens 5 are processed, the fourth lens 4 and the fifth lens 5 are processed conveniently. In one embodiment of the present invention, as shown in fig. 4, the lens light incident surface 41 of the fourth lens 4 and the lens light incident surface 51 of the fifth lens 5 are both free-form surfaces;
the surface type equations of the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5 are:
Figure BDA0002886073110000101
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients of the quadric surfaces in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are the coefficients of aspheric high-order terms respectively. The control of the magnification of the lens component in the meridian plane (y, z) and the sagittal plane (x, z) can be facilitated.
In one embodiment of the present invention, the first lens 1 and the second lens 2 are both glass molded members; the third lens 3, the fourth lens 4, and the fifth lens 5 are each a glass molded article or a light-transmitting plastic molded article. The first lens 1 and the second lens 2 are close to the display unit, and the glass molding piece is adopted, so that the influence of high temperature at the display unit on the first lens 1 and the second lens 2 can be reduced. First, preferably, in order to reduce the overall weight and volume of the lens assembly and further achieve light weight and miniaturization of the vehicle lamp, the third lens 3, the fourth lens 4 and the fifth lens 5 are light-transmitting plastic molded parts, so that the processing difficulty and the processing cost can be reduced while the surface type freedom degree is ensured. The light transmissive plastic may be a conventional optical plastic such as polypropylene, polystyrene, polycarbonate, propylene-vinyl-acrylonitrile copolymer, or other optical plastic.
In a relatively preferred embodiment of the present invention, as shown in fig. 1-4, there is provided a lens assembly comprising a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5 arranged in this order; the first lens 1 and the second lens 2 are both glass molded parts, and the third lens 3, the fourth lens 4 and the fifth lens 5 are all light-transmitting plastic molded parts; the first lens 1 is a concave lens, and both the lens light incident surface 11 and the lens light emergent surface 12 of the first lens 1 can be matched with a spherical surface; the second lens 2 is a convex lens, the lens light incident surface 21 and the lens light emitting surface 22 of the second lens 2 are both spherical surfaces, and the lens light incident surface 31 and the lens light emitting surface 32 of the third lens 3 are respectively a spherical surface, a quadric surface or an even aspheric surface; the lens light-emitting surface 12 of the first lens 1 is attached to the lens light-entering surface 21 of the second lens 2; the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5 are both curved surfaces that are concave toward the respective light exit surfaces, and the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5 are both set to have different curvatures in a meridian plane (y, z) and a sagittal plane (x, z), so that the magnification of the combination of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, and the fifth lens 5 in the meridian plane (y, z) is greater than the magnification in the sagittal plane (x, z) of the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5, and the surface type equation is:
Figure BDA0002886073110000111
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyQuadric surface coefficients in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are aspheric high-order term coefficients respectively;
the lens light emitting surface 42 of the fourth lens 4 is a curved surface recessed toward the lens light incident surface 41 of the fourth lens 4, and the surface type equations of the lens light emitting surface 42 of the fourth lens 4 and the lens light emitting surface 52 of the fifth lens 5 are as follows:
Figure BDA0002886073110000112
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of the quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8Respectively, the coefficients of the high-order terms of the surface type.
The above-mentioned relatively preferred embodiment provides a lens assembly, which can compress the viewing angle in the vertical direction of the vehicle body to a certain extent by using the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 in combination, and reasonably and effectively utilize the pixel size of the display unit 6. Through the combination of the lenses with different compression ratios in the vertical direction and the left-right direction, the visual angle requirements of meridian planes and sagittal planes of road illumination can be met, and the illumination in the effective illumination range of the road surface is improved. And the volume is less, reasonable in design, convenient to use, the practicality is strong.
In a second aspect, the basic embodiment of the present invention further provides a car light module, as shown in fig. 1 and fig. 5, the car light module includes a display unit 6 and the lens assemblies provided in the above embodiments, and the lens assemblies are disposed in the light emitting direction of the display unit 6.
Specifically, the display unit 6 may be a Digital Light Processing (DLP) unit, a Liquid Crystal Display (LCD) unit, an array LED, or the like.
The above-described basic embodiment provides the vehicle lamp module in which the ratio of the length of the image plane 7 in the up-down direction to the length in the left-right direction is smaller than the ratio of the length of the display unit 6 in the up-down direction to the length in the left-right direction.
As an embodiment of the present invention, as shown in fig. 5 to 7, parameters of each element in the lamp module are shown in table 1:
TABLE 1
Figure BDA0002886073110000121
The curvature corresponds to the curvature of each surface and is the reciprocal of the curvature radius. The pitch represents a center distance from the current surface to the next surface in the optical axis direction. The half-aperture is the effective half-aperture of the optical surface. The first lens 1 and the second lens 2 adopt double-cemented glass lenses, and the lens light emergent surface 12 of the first lens 1 and the lens light incident surface 21 of the second lens 2 are superposed and have the same surface type. The center distance of the lens light-emitting surface 52 of the fifth lens 5 is the distance between the lens light-emitting surface 52 and the image plane 7.
In this embodiment, the lens assembly is partially asymmetrically trimmed due to limitations of the lamp mounting structure and configuration, as shown in fig. 5, 6 and 7.
In this embodiment, the F number of the projection lens is 1, the display unit 6 adopts a DLP module with an effective display area aspect ratio of 2:1, the effective display size is 12.5mm × 6.25mm, and the DLP module includes a digital micromirror 61(DMD) and a digital micromirror WINDOW 62(DMD WINDOW), the digital micromirror WINDOW 62 has a digital micromirror WINDOW light incident surface 621 and a digital micromirror WINDOW light emergent surface 622, wherein the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, and the fifth lens 5 are all glass molded parts; the first lens 1 is a concave lens, and both the lens light incident surface 11 and the lens light emergent surface 12 of the first lens 1 can be matched with a spherical surface; the second lens 2 and the third lens 3 are convex lenses, the lens light incident surface 21 and the lens light emitting surface 22 of the second lens 2 are both spherical surfaces, and the lens light incident surface 31 and the lens light emitting surface 32 of the third lens 3 are respectively a spherical surface, a quadric surface or an even aspheric surface; the lens light-emitting surface 12 of the first lens 1 is attached to the lens light-entering surface 21 of the second lens 2;
the surface type equations of the lens entrance surface 41 of the fourth lens 4 and the lens entrance surface 51 of the fifth lens 5 are:
Figure BDA0002886073110000131
wherein Z is the rise of a plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyRespectively in the x-direction and y-directionCurvature of direction, kxAnd kyThe coefficients are quadric coefficients in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are high-order coefficient of aspheric surface respectively;
the above parameters are shown in table 2:
TABLE 2
Lens entrance surface 41 of fourth lens Lens light incident surface 51 of fifth lens
Curvature C in x-directionx(mm-1) 0.02615 0.01718
Curvature C in y-directiony(mm-1) 0.01731 0.00507
Coefficient k of quadric surface in x directionx -1.14935 0.69594
Coefficient of quadric k in y-directiony -3.41552 1.51995
Coefficient of higher order term AR -2.01269E-06 -1.36326E-06
Coefficient of higher order term BR 9.23498E-16 8.89231E-09
Coefficient of higher order term CR 5.58532E-13 -5.39644E-12
High order coefficient DR 1.49490E-16 7.87213E-16
High order term coefficient AP -0.084575 0.45835
Coefficient of higher order term BP 23.62889 -0.03235
High order coefficient of term CP 0.12573 -0.06546
Coefficient of higher order DP -0.29095 -0.12061
The surface type equations of the lens light-emitting surface 42 of the fourth lens element 4 and the lens light-emitting surface 52 of the fifth lens element 5 are:
Figure BDA0002886073110000141
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of the quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8High-order term coefficients of the surface type respectively;
the above parameters are shown in table 3:
TABLE 3
Lens light-emitting surface 42 of fourth lens Lens light-emitting surface 52 of fifth lens
Surface curvature c (mm)-1) 0.030688967 0.005837484
Coefficient of quadric surface k -1.86116 -13.25313
Coefficient of higher order term alpha1 0.00000E+00 0.00000E+00
Coefficient of higher order term alpha2 -1.24537E-06 -1.98663E-08
Coefficient of higher order term alpha3 7.72325E-10 8.82385E-09
Coefficient of higher order term alpha4 -9.85785E-13 -4.82089E-12
Coefficient of higher order term alpha5 3.71398E-15 5.42060E-17
Coefficient of higher order term alpha6 0.00000E+00 0.00000E+00
Coefficient of higher order term alpha7 0.00000E+00 0.00000E+00
Coefficient of higher order term alpha8 0.00000E+00 0.00000E+00
In the vehicle lamp module according to the above embodiment, the angle of view of the emitted light in the sagittal plane is 18.5 °, the angle of view of the emitted light in the meridional plane is 7 °, the aspect ratio of the emission image plane is 2.66:1, and the compression ratio of the vehicle lamp module in the vertical direction is 1.33.
In addition, the basic implementation manner of the invention also provides a vehicle lamp, which comprises the vehicle lamp module provided by each embodiment. The vehicle lamp at least has the advantages of the vehicle lamp module, and the description is omitted.
Embodiments of the present invention also provide a vehicle including the lamp of the above embodiments. The vehicle at least has the advantages of the vehicle lamp, and the description is omitted.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (11)

1. The lens assembly is characterized by comprising a first lens (1), a second lens (2), a third lens (3), a fourth lens (4) and a fifth lens (5) which are arranged in sequence;
the first lens (1) is a concave lens, the second lens (2) is a convex lens, and a lens light-emitting surface (12) of the first lens (1) is attached to a lens light-in surface (21) of the second lens (2);
the lens light incident surface (31) and the lens light emergent surface (32) of the third lens (3) are both rotational symmetry surfaces;
the fourth lens (4) and the fifth lens (5) are anamorphic lenses, the lens entrance surface (41) of the fourth lens (4) and the lens entrance surface (51) of the fifth lens (5) are both curved surfaces recessed toward the respective exit surfaces, the lens exit surface (42) of the fourth lens (4) is a curved surface recessed toward the lens entrance surface (41) of the fourth lens (4), and the lens entrance surface (41) of the fourth lens (4) and the lens entrance surface (51) of the fifth lens (5) are both set so that the curvature in a meridian plane (y, z) and the curvature in an sagittal plane (x, z) are different from each other, so that the combination of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), and the fifth lens (5) can be made in the meridian plane (y), z) is smaller than the magnification in the sagittal plane (x, z).
2. A lens assembly according to claim 1, wherein the lens entrance face (11) and the lens exit face (12) of the first lens (1) are both capable of matching a spherical surface;
the lens light incident surface (21) and the lens light emergent surface (22) of the second lens (2) are both spherical surfaces.
3. A lens assembly according to claim 1, characterized in that the lens entrance face (31) and the lens exit face (32) of the third lens (3) are each one of a spherical face, a quadratic face and an even aspheric face, respectively.
4. A lens assembly according to claim 1, characterized in that the lens exit surface (42) of the fourth lens (4) and the lens exit surface (52) of the fifth lens (5) are both rotational symmetry planes.
5. A lens assembly according to claim 4, characterized in that the lens exit surface (42) of the fourth lens (4) is quadric or matched with an even aspheric surface;
and the lens light-emitting surface (52) of the fifth lens is a quadric surface or an even aspheric surface.
6. A lens assembly according to claim 5, characterized in that the lens exit surface (42) of the fourth lens (4) is matched with an even-order aspheric surface; the lens light-emitting surface (52) of the fifth lens (5) is an even-order aspheric surface;
the surface type equations of the lens light-emitting surface (42) of the fourth lens (4) and the lens light-emitting surface (52) of the fifth lens (5) are as follows:
Figure FDA0002886073100000021
wherein Z is the faceRise of the profile, c curvature, k conic coefficient, r radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8Respectively, the coefficients of the high-order terms of the surface type.
7. A lens assembly according to any one of claims 1 to 6, characterised in that the lens entrance face (41) of the fourth lens (4) and the lens entrance face (51) of the fifth lens (5) are both free-form surfaces;
the surface type equations of the lens light incident surface (41) of the fourth lens (4) and the lens light incident surface (51) of the fifth lens (5) are as follows:
Figure FDA0002886073100000031
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients of the quadric surfaces in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are the coefficients of aspheric high-order terms respectively.
8. A lens assembly according to any one of claims 1-6, characterised in that the first lens (1) and the second lens (2) are both glass mouldings;
the third lens (3), the fourth lens (4) and the fifth lens (5) are respectively a glass molded piece or a light-transmitting plastic molded piece.
9. A vehicle lamp module, comprising a display unit (6) and the lens assembly of any one of claims 1-8, the lens assembly being arranged in a light exit direction of the display unit (6).
10. A vehicular lamp characterized by comprising the vehicular lamp module according to claim 9.
11. A vehicle comprising the lamp of claim 10.
CN202110013520.6A 2021-01-06 2021-01-06 Lens subassembly, car light module, car light and vehicle Pending CN114719222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110013520.6A CN114719222A (en) 2021-01-06 2021-01-06 Lens subassembly, car light module, car light and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110013520.6A CN114719222A (en) 2021-01-06 2021-01-06 Lens subassembly, car light module, car light and vehicle

Publications (1)

Publication Number Publication Date
CN114719222A true CN114719222A (en) 2022-07-08

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