WO2022147911A1 - 一种双远心投影镜头及汽车的抬头显示装置 - Google Patents

一种双远心投影镜头及汽车的抬头显示装置 Download PDF

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Publication number
WO2022147911A1
WO2022147911A1 PCT/CN2021/083379 CN2021083379W WO2022147911A1 WO 2022147911 A1 WO2022147911 A1 WO 2022147911A1 CN 2021083379 W CN2021083379 W CN 2021083379W WO 2022147911 A1 WO2022147911 A1 WO 2022147911A1
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Prior art keywords
lens
light
image
telecentric projection
projection lens
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PCT/CN2021/083379
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English (en)
French (fr)
Inventor
梁久伟
朱炜湛
丁明内
杨伟樑
高志强
Original Assignee
广景视睿科技（深圳）有限公司
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Priority to US17/546,141 priority Critical patent/US20220221699A1/en
Publication of WO2022147911A1 publication Critical patent/WO2022147911A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/22—Telecentric objectives or lens systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features

Definitions

  • the embodiments of the present application relate to the technical field of projection optics, and in particular, to a bi-telecentric projection lens and a head-up display device for an automobile.
  • HUD refers to the head-up display through the windshield of the car.
  • the new smart car is usually equipped with a HUD, which allows users to observe the speed, speed limit indication, and driving route without looking down at the dashboard.
  • the HUD mounted in the car that is, the head-up display device
  • the head-up display device usually only can display a two-dimensional plane screen, such as the driving information screen of the car, or, only AR images can be displayed, such as displaying road condition information images collected by car cameras. If two images need to be displayed at the same time, two sets of head-up display devices are needed to achieve this.
  • the embodiment of the present application intends to propose a projection optical system capable of realizing projection imaging of two images and a head-up display device of an automobile.
  • the embodiment of the present application designs a bi-telecentric projection lens to realize a single
  • the optical engine single DMD chip
  • the purpose of the embodiments of the present application is to provide a bi-telecentric projection lens and a head-up display device for an automobile.
  • the embodiments of the present application provide a bi-telecentric projection lens, which is applied to a projection optical system in a head-up display device of an automobile.
  • the DMD chips are arranged in sequence: the front group lens, the rear group lens and the equivalent prism; among them,
  • the front lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence, and the rear lens group includes a sixth lens, a seventh lens, an eighth lens and the ninth lens, the third lens and the fourth lens form a doublet lens;
  • the DMD chip is configured to emit two images simultaneously, and when the DMD chip emits two images simultaneously, the two images emitted simultaneously are imaged at different positions after being emitted by the bi-telecentric projection lens.
  • the image side of the first lens is concave and the object side is convex;
  • the image side of the second lens is convex, and the object side is convex;
  • the image side of the third lens is concave, and the object side is concave;
  • the image side of the fourth lens is convex, and the object side is convex;
  • the image side of the fifth lens is convex, and the object side is convex;
  • the image side of the sixth lens is concave, and the object side is concave;
  • the image side of the seventh lens is concave, and the object side is convex;
  • the image side of the eighth lens is convex, and the object side is convex;
  • the image side of the ninth lens is convex, and the object side is concave.
  • the equivalent prism is a turning prism and is a right-angled triangular prism, the right-angled surface of which is opposite to the light-emitting surface of the DMD chip, and the other right-angled surface is opposite to the light-incident side of the rear lens.
  • the reflection angle of its inclined plane is 90 degrees
  • the optical axis of the DMD chip is perpendicular to the optical axes of the front lens group and the rear lens group.
  • the focal length of the bi-telecentric projection lens is 90 mm, and the total length of the bi-telecentric projection lens is 150 mm.
  • the magnification of the bi-telecentric projection lens is 1:1, and the relative aperture of the bi-telecentric projection lens is 2.
  • the embodiments of the present application provide a head-up display device for an automobile, which is provided with a head-up display device capable of projecting a first image and a second image on the front windshield of the automobile to realize imaging.
  • a projection optical system the projection optical system includes:
  • the bi-telecentric projection lens is configured to be capable of simultaneously emitting light beams of the first image and the second image;
  • a spectroscopic device the optical center of which is arranged on the image plane of the bi-telecentric projection lens, and the light-incident side thereof is arranged toward the light-emitting side of the bi-telecentric projection lens;
  • a first light-reflecting unit the light-incident side of which is disposed toward the first light-reflecting side of the light splitting device
  • a first lens whose light-incident side is disposed toward the light-reflecting side of the first light-reflecting unit, and whose light-emitting side is used for emitting the first image
  • a second light-reflecting unit the light-incident side of which is disposed toward the second light-reflecting side of the light splitting device
  • the light incident side is disposed toward the light reflection side of the second light reflection unit, and the light exit side is used for emitting the second image.
  • the spectroscopic device includes a first reflection structure and a second reflection structure, wherein the first reflection structure is used for receiving and reflecting the light beam of the first image, and the second reflection structure is used for Receiving and reflecting the light beam of the second image, the reflective side of the first reflective structure is the first reflective side of the spectroscopic device, and the reflective side of the second reflective structure is the second reflective side of the spectroscopic device Reflective side.
  • the first reflective structure and the second reflective structure are mirrors.
  • the first reflective structure and the second reflective structure are a combination of a mirror and a filter, a high-reflection film and/or a lens enhancement.
  • the first reflection unit and the second reflection unit are mirrors.
  • a bi-telecentric projection lens is provided in the embodiment of the present application, and the bi-telecentric projection lens includes a distance from the image plane to the DMD. Disposed between the chips in sequence: a front group lens, a rear group lens and an equivalent prism; wherein, the front group lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence, The rear lens group includes a sixth lens, a seventh lens, an eighth lens and a ninth lens arranged in sequence, the third lens and the fourth lens form a doublet lens; the DMD chip is configured to emit simultaneously two images, and when the DMD chip emits two images at the same time, the two images emitted at the same time are imaged at different positions after being emitted by the bi-telecentric projection lens.
  • the projection lens can be applied to a projection optical system in a head-up display device of an automobile, so as to realize simultaneous projection imaging of two
  • FIG. 1 is a schematic diagram of an application scenario of a bi-telecentric projection lens provided by an embodiment of the present application
  • Fig. 2 is an imaging schematic diagram of the front windshield in the application scene shown in Fig. 1;
  • FIG. 3 is a schematic diagram of an optical path diagram of a bi-telecentric projection lens provided in Embodiment 1 of the present application;
  • Fig. 4 is the partial structure schematic diagram of a kind of bi-telecentric projection lens shown in Fig. 3;
  • FIG. 5 is a schematic partial structure diagram of another bi-telecentric projection lens provided in Embodiment 1 of the present application.
  • Fig. 6 is the schematic diagram of the full field of view transfer function MTF value of a kind of bi-telecentric projection lens shown in Fig. 3;
  • FIG. 7 is a schematic diagram of field curvature and distortion of the full field of view and full waveband of the bi-telecentric projection lens shown in FIG. 3;
  • FIG. 8 is a schematic diagram of vertical axis chromatic aberration of the full field of view and full waveband of the bi-telecentric projection lens shown in FIG. 3;
  • FIG. 9 is a schematic diagram of a dot sequence of a full field of view of a bi-telecentric projection lens shown in FIG. 3;
  • FIG. 10 is a schematic diagram of the hardware structure of a head-up display device for an automobile provided in Embodiment 2 of the present application;
  • FIG. 11 is a schematic diagram of the optical path structure of the projection optical system in the head-up display device of the automobile shown in FIG. 10 .
  • connection structure uses the light exit direction of the light beam as a reference to define the position of the components.
  • the terms “upper,” “lower,” “left,” “right,” “vertical,” “horizontal,” and similar expressions used in this specification are for illustrative purposes only.
  • the present application uses the light exit direction of the light beam as a reference to define the position of the components.
  • an embodiment of the present application provides a bi-telecentric projection lens, in which a DMD chip is configured to emit two images at the same time, and when the DMD chip emits two images at the same time, the two images emitted at the same time After being emitted by the bi-telecentric projection lens, images are formed at different positions, so that different display contents and pictures can be realized respectively in two different positions, and the bi-telecentric projection lens provided by the embodiment of the present application is adopted, and the imaging effect is good , The device is small in size.
  • FIG. 1 is a schematic diagram of one application environment of a bi-telecentric projection lens provided by an embodiment of the present application
  • FIG. 2 is an imaging diagram of a front windshield in the application scenario shown in FIG. 1
  • the application environment includes: a car 1
  • the car 1 includes: a front windshield A and a head-up display device B.
  • the projection optical system 10 in the head-up display device B adopts the bi-telecentric projection lens 100 provided in the embodiment of the present application to realize the imaging display of two kinds of images, and the bi-telecentric projection lens 100 outputs the first image P1 and the light beams of the second image P2 can pass through the first lens 11 and the second lens 12 in the projection optical system 10 to output the first image P1 and the second image P2, respectively.
  • the first image P1 is mainly used to display a two-dimensional image, for example, the driving information of the car 1, and the driving information includes but is not limited to the speed information of the car 1, fuel quantity information, etc. , based on this, the car 1 should be equipped with a speed sensor, a fuel sensor, etc., specifically, the setting of the two-dimensional image, the setting of the driving information of the car 1 and the corresponding sensor settings can be based on actual needs. The selection does not need to be bound by the limitations of the application scenarios of this application.
  • the second image P2 is mainly used to display a three-dimensional image, that is, an AR image.
  • the road condition information of the road where the car 1 is located and the road condition information includes but is not limited to where the car 1 is located. Lanes, road markings, zebra crossings, obstacles, traffic lights, signs, etc. on the road, based on this, the car 1 should be equipped with detection equipment such as cameras and lidars. Further, if the car 1 can realize The navigation function can also be displayed by superimposing the navigation instruction information on the road condition information.
  • the setting of the three-dimensional image, the road condition information of the road where the car 1 is located, and the setting of the corresponding detection equipment can be performed according to actual needs. Selection does not need to be bound by the limitations of the application scenarios of this application.
  • the front windshield A is preferably made of a glass material capable of clear imaging and good light transmittance. Specifically, it can be selected according to actual needs, and does not need to be limited by the application scenario of this application.
  • the embodiment of the present application provides a bi-telecentric projection lens, which is applied to a projection optical system in a head-up display device of an automobile.
  • the head-up display device of the automobile may be the head-up display device B of the automobile 1 as shown in the above application scenario.
  • FIG. 3 and FIG. 4 respectively show the optical path and structure of a bi-telecentric projection lens provided by the embodiment of the present application.
  • the bi-telecentric projection lens 100 extends from the image plane M to the DMD chip 110 Arranged in sequence: the front group lens 120 , the rear group lens 130 , and the equivalent prism 140 .
  • the front lens group 120 includes a first lens 121 , a second lens 122 , a third lens 123 , a fourth lens 124 and a fifth lens 125 arranged in sequence
  • the rear lens group 130 includes a sixth lens arranged in sequence 136, the seventh lens 137, the eighth lens 138 and the ninth lens 139, the third lens 123 and the fourth lens 124 form a doublet lens, which is capable of correcting spherical aberration, chromatic aberration and secondary spectrum It has good correction ability;
  • the DMD chip 110 is configured to emit two images at the same time, and when the DMD chip 110 emits two images at the same time, the two images emitted at the same time pass through the bi-telecentric projection lens 100 Imaging at different positions after exit.
  • Both the eighth lens 138 and the ninth lens 139 are spherical lenses.
  • the image side S1 of the first lens 121 is concave, the object side S2 is convex; the image side S3 of the second lens 122 is convex, and the object side S4 is convex; the image side S5 of the third lens 123 is concave , the object side S6 is a concave surface; the image side S6 of the fourth lens 124 is a convex surface, and the object side S7 is a convex surface; the image side S8 of the fifth lens 125 is a convex surface, and the object side S9 is a convex surface; the sixth lens
  • the image side S10 of 136 is concave, and the object side S11 is concave; the image side S12 of the seventh lens 137 is concave, and the object side S13 is convex; the image side S14 of the eighth lens 138 is convex, and the object side S15 is Convex; the image side S16 of the ninth lens 139 is convex, and the object side S17
  • the function of the equivalent prism 140 is to deflect the light and separate the illumination light path and the imaging light path to avoid interference.
  • FIG. 3 shows the structure of another bi-telecentric projection lens provided by the embodiment of the present application. In the embodiment shown in FIG.
  • the equivalent prism 140 is a turning prism And it is a right-angled triangular prism, its right-angled surface is opposite to the light-emitting surface of the DMD chip 110, and its other right-angled surface is opposite to the light-incident side of the rear lens 130, and the reflection angle of the inclined surface is 90 degrees, and there are , the optical axis of the DMD chip 110 is perpendicular to the optical axes of the front lens group 120 and the rear lens group 130 .
  • the DMD chip 110 includes an effective surface 111 of the DMD chip 110 and a protective glass 112 of the DMD chip 110 .
  • the DMD chip 110 is used to emit a light beam for imaging.
  • the DMD chip 110 As shown in the figure, it is divided into upper and lower regions, which are respectively used to emit two kinds of light beams for imaging.
  • the total optical length of the bi-telecentric projection lens 100 provided by the embodiment of the present application It can be controlled at 150mm, and the effective focal length of the bi-telecentric projection lens 100 is 90mm, the magnification of the bi-telecentric projection lens 100 is 1:1, and the relative aperture of the bi-telecentric projection lens is 2.
  • the bi-telecentric projection lens 100 as shown in Figs. Image quality map of the whole waveband of the field of view. specifically,
  • FIG. 6 is a schematic diagram of the MTF value of the full field of view of the bi-telecentric projection lens provided by the embodiment of the present application. As shown in FIG. 6 , the full field of view optical transfer function of the bi-telecentric projection lens 100 MTF>40%.
  • FIG. 7 is a field curvature and distortion diagram of a full field of view and full waveband of a bi-telecentric projection lens provided by an embodiment of the present application.
  • the left side is a field curvature diagram
  • the right side is a distortion diagram.
  • the dual The field curvature of the telecentric projection lens 100 is controlled within ⁇ 0.2mm, and the distortion is controlled within ⁇ 0.5%.
  • FIG. 8 is a vertical chromatic aberration diagram of the full field of view and full wavelength of the bi-telecentric projection lens provided by the embodiment of the present application. As shown in FIG. 8 , the vertical chromatic aberration of the bi-telecentric projection lens 100 does not exceed 1 ⁇ m.
  • FIG. 9 is a dot diagram of the full field of view of the bi-telecentric projection lens provided by the embodiment of the present application. As shown in FIG. 9 , the rms radius of the bi-telecentric projection lens 100 is controlled to be 5.0 ⁇ m ⁇ RMS ⁇ 8 ⁇ m.
  • An embodiment of the present application provides a head-up display device for an automobile, which may be the head-up display device B of the automobile 1 as shown in the above application scenario.
  • a head-up display device for an automobile which may be the head-up display device B of the automobile 1 as shown in the above application scenario.
  • FIG. 10 shows the implementation of the present application.
  • FIG. 11 shows the optical path structure of the projection optical system in the head-up display device B of the automobile 1 shown in FIG. 10.
  • the head-up display device B of the automobile 1 is provided with a The projection optical system 10 for projecting the first image P1 and the second image P2 on the front windshield A of the automobile 1 to realize imaging, the projection optical system 10 includes: the double-telephoto system as described in the above-mentioned first embodiment The cardiac projection lens 100 , and the first lens 11 , the second lens 12 , the beam splitting device 13 , the first reflection unit 14 and the second reflection unit 15 .
  • the bi-telecentric projection lens 100 is the bi-telecentric lens 100 described in the first embodiment, and its structure, connection relationship, setting position, optical path, etc., please refer to the specific embodiments described in the first embodiment. Describe again.
  • the optical center of the spectroscopic device 13 is set on the image plane of the bi-telecentric projection lens 100 , and the light-incident side of the spectroscopic device 13 is arranged toward the light-emitting side of the bi-telecentric projection lens 100 ; further, the spectroscopic device 13 includes a first reflection structure 13a and a second reflection structure 13b, wherein the first reflection structure 13a is used to receive and reflect the light beam of the first image, and the second reflection structure 13b is used to receive and reflect the light beam of the first image.
  • the reflective side of the first reflective structure 13 a is the first reflective side of the spectroscopic device 13
  • the reflective side of the second reflective structure 13 b is the second reflective side of the spectroscopic device 13 side.
  • the first reflection structure 13a and the second reflection structure 13b are mirrors
  • the first reflection structure 13a and the second reflection structure 13b are mirrors, filters, and high-reflection films and/or a combination of enhancement lenses.
  • the first reflective unit 14 is disposed on the light incident side toward the first reflective side of the light splitting device 13; the first reflecting unit 14 is a reflector, which is arranged at a preset angle between the light splitting device 13 and the light splitting device 13. Between the first lenses 11, the first reflecting unit 14 may further include a high-reflection film coated on the reflecting mirror to realize full reflection of the light beam. In the embodiment shown in FIG. 11 of the present application, The reflection angle of the inclined plane of the first reflective unit 14 is 90 degrees. In other settings, the settings of the first reflective unit 14 and its angle can be set according to actual needs, and do not need to be bound by this application. Limitations of Examples.
  • the light incident side of the first lens 11 is disposed toward the reflective side of the first reflective unit 14, and the light emitting side is used to emit the first image; specifically, the first lens 11 may be a single lens , it can also be a lens group composed of multiple lenses, which can also include other optical devices. In actual use scenarios, it can be set according to actual needs, and does not need to be bound by the limitations of the embodiments of the present application.
  • the second light reflecting unit 15 is disposed on the light incident side facing the second light reflecting side of the light splitting device 13; the second reflecting unit 15 is a reflector, which is arranged at a preset angle between the light splitting device 13 and the light splitting device 13. Between the second lenses 12, the second reflector unit 15 may further include a high-reflection film coated on the reflector to realize full reflection of the light beam. In the embodiment shown in FIG. 11 of the present application, The reflection angle of the inclined plane of the second light-reflecting unit 15 is 90 degrees. In other settings, the setting of the second light-reflecting unit 15 and its angle can be set according to actual needs, and it is not necessary to be bound by this application. Limitations of Examples.
  • the light-incident side of the second lens 12 is disposed toward the light-reflecting side of the second light-reflecting unit 15 , and the light-emitting side thereof is used for emitting the second image.
  • the second lens 12 may be a single lens, or may be a lens group composed of multiple lenses, and may also include other optical devices. It is necessary to be bound by the limitations of the embodiments of the present application.
  • An embodiment of the present application provides a bi-telecentric projection lens
  • the bi-telecentric projection lens includes: a front group lens, a rear group lens and an equivalent prism, which are arranged in sequence from the image plane to the DMD chip; wherein, the The front lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence, and the rear lens group includes a sixth lens, a seventh lens, an eighth lens, and a fifth lens arranged in sequence.
  • the third lens and the fourth lens form a doublet lens;
  • the DMD chip is configured to emit two images at the same time, and when the DMD chip simultaneously emits two images, the The two images are imaged at different positions after being emitted by the bi-telecentric projection lens.
  • the bi-telecentric projection lens provided in the embodiment of the present application can be applied to the projection optical system in the head-up display device of the automobile, so as to realize two kinds of images. At the same time projection imaging, and the imaging effect is good.
  • the device embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physically separated unit, that is, it can be located in one place, or it can be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

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Abstract

一种双远心投影镜头（100），包括从像面（M）到DMD芯片（110）之间依次设置的：前组透镜（120）、后组透镜（130）和等效棱镜（140）；其中，前组透镜（120）包括依次设置的第一透镜（121）、第二透镜（122）、第三透镜（123）、第四透镜（124）和第五透镜（125），后组透镜（130）包括依次设置的第六透镜（136）、第七透镜（137）、第八透镜（138）和第九透镜（139），第三透镜（123）和第四透镜（124）组成一个双胶合透镜；DMD芯片（110）配置为同时出射两个图像，且在DMD芯片（110）同时出射两个图像时，同时出射的两个图像经双远心投影镜头（100）出射后成像在不同位置上，这种双远心投影镜头（100）能够应用于汽车（1）的抬头显示装置（B）中的投影光学系统（10）中，以实现两种画面的同时投影成像，且成像效果好。

Description

一种双远心投影镜头及汽车的抬头显示装置
相关申请的交叉参考
本申请要求于2021年1月8日提交中国专利局，申请号为202110022840.8，申请名称为“一种双远心投影镜头及汽车的抬头显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及投影光学技术领域，特别涉及一种双远心投影镜头及汽车的抬头显示装置。
背景技术
HUD是指通过汽车风挡式抬头显示器，如今随着汽车的智能化发展，目前新型智能汽车中通常都搭配有HUD，这使得用户无需低头查看仪表盘就可以观察到车速、限速指示、驾驶路线图等车辆信息和路况信息，其中AR HUD是目前HUD发展的趋势，AR HUD即能够显示AR画面的抬头显示装置。
在实现本申请实施例过程中，申请人发现以上相关技术中至少存在如下问题：目前，汽车中搭载的HUD，即抬头显示装置，通常仅能够显示二维平面画面，如汽车的驾驶信息画面，或者，只能够AR画面，如显示汽车摄像头所采集的路况信息画面，如果需要同时显示两种画面，需要采用两套抬头显示装置才能够实现。
本申请实施例意在提出一种能够实现两种画面投影成像的投影光学系统及汽车的抬头显示装置，为了能够实现该方案，本申请实施例设计了一款双远心投影镜头，以实现单个光学引擎(单DMD芯片)配合双光镜头成像，从而实现上述方案中一种能够实现两种画面投影成像的投 影方案。
发明内容
针对现有技术的上述缺陷，本申请实施例的目的是提供一种双远心投影镜头及汽车的抬头显示装置。
本申请实施例的目的是通过如下技术方案实现的：
为解决上述技术问题，第一方面，本申请实施例中提供了一种双远心投影镜头，应用于汽车的抬头显示装置中的投影光学系统，所述双远心投影镜头包括从像面到DMD芯片之间依次设置的：前组透镜、后组透镜和等效棱镜；其中，
所述前组透镜包括依次设置的第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，所述后组透镜包括依次设置的第六透镜、第七透镜、第八透镜和第九透镜，所述第三透镜和所述第四透镜组成一个双胶合透镜；
所述DMD芯片配置为同时出射两个图像，且在所述DMD芯片同时出射两个图像时，同时出射的所述两个图像经所述双远心投影镜头出射后成像在不同位置上。
在一些实施例中，所述第一透镜的像侧面为凹面、物侧面为凸面；
所述第二透镜的像侧面为凸面、物侧面为凸面；
所述第三透镜的像侧面为凹面、物侧面为凹面；
所述第四透镜的像侧面为凸面、物侧面为凸面；
所述第五透镜的像侧面为凸面、物侧面为凸面；
所述第六透镜的像侧面为凹面、物侧面为凹面；
所述第七透镜的像侧面为凹面、物侧面为凸面；
所述第八透镜的像侧面为凸面、物侧面为凸面；
所述第九透镜的像侧面为凸面、物侧面为凹面。
在一些实施例中，所述等效棱镜为一转向棱镜且为一直角三棱镜，其一直角面与所述DMD芯片的出光面相对，其另一直角面与所述后组透镜的入光侧相对，其斜面的反射角度为90度，
且有，所述DMD芯片的光轴与所述前组透镜和所述后组透镜的光轴垂直。
在一些实施例中，所述双远心投影镜头的焦距为90mm，所述双远心投影镜头的总长为150mm。
在一些实施例中，所述双远心投影镜头的放大倍率为1:1，所述双远心投影镜头的相对孔径为2。
为解决上述技术问题，第二方面，本申请实施例中提供了一种汽车的抬头显示装置，设置有一能够将第一图像和第二图像投影在所述汽车的前挡风玻璃上实现成像的投影光学系统，所述投影光学系统包括：
如上述第一方面所述的双远心投影镜头，所述双远心投影镜头配置为能够同时出射所述第一图像和所述第二图像的光束；以及，
分光装置，其光学中心设置在所述双远心投影镜头的像面上，且其入光侧朝向所述双远心投影镜头的出光侧设置；
第一反光单元，其入光侧朝向所述分光装置的第一反光侧设置；
第一镜头，其入光侧朝向所述第一反光单元的反光侧设置，其出光侧用于出射所述第一图像；
第二反光单元，其入光侧朝向所述分光装置的第二反光侧设置；
第二镜头，其入光侧朝向所述第二反光单元的反光侧设置，其出光侧用于出射所述第二图像。
在一些实施例中，所述分光装置包括第一反射结构和第二反射结构，其中，所述第一反射结构用于接收并反射所述第一图像的光束，所 述第二反射结构用于接收并反射所述第二图像的光束，所述第一反射结构的反光侧即为所述分光装置的第一反光侧，所述第二反射结构的反光侧即为所述分光装置的第二反光侧。
在一些实施例中，所述第一反射结构和所述第二反射结构为反射镜。
在一些实施例中，所述第一反射结构和所述第二反射结构为反射镜与滤波片、高反膜和/或增透镜的组合。
在一些实施例中，所述第一反射单元和所述第二反射单元为反射镜。
与现有技术相比，本申请的有益效果是：区别于现有技术的情况，本申请实施例中提供了一种双远心投影镜头，所述双远心投影镜头包括从像面到DMD芯片之间依次设置的：前组透镜、后组透镜和等效棱镜；其中，所述前组透镜包括依次设置的第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，所述后组透镜包括依次设置的第六透镜、第七透镜、第八透镜和第九透镜，所述第三透镜和所述第四透镜组成一个双胶合透镜；所述DMD芯片配置为同时出射两个图像，且在所述DMD芯片同时出射两个图像时，同时出射的所述两个图像经所述双远心投影镜头出射后成像在不同位置上，本申请实施例提供的双远心投影镜头能够应用于汽车的抬头显示装置中的投影光学系统中，以实现两种画面的同时投影成像，且成像效果好。
附图说明
一个或多个实施例中通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件/模块表示为类似的元件/模块，除非有特别申明，附图中 的图不构成比例限制。
图1是本申请实施例提供的一种双远心投影镜头的应用场景示意图；
图2是图1所示应用场景中前挡风玻璃的成像示意图；
图3是本申请实施例一提供的一种双远心投影镜头的光路图示意图；
图4是图3所示的一种双远心投影镜头的局部结构示意图；
图5是本申请实施例一提供的另一种双远心投影镜头的局部结构示意图；
图6是图3所示的一种双远心投影镜头的全视场传递函数MTF值示意图；
图7是图3所示的一种双远心投影镜头的全视场全波段的场曲与畸变示意图；
图8是图3所示的一种双远心投影镜头的全视场全波段的的垂轴色差示意图；
图9是图3所示的一种双远心投影镜头的全视场的点列示意图；
图10是本申请实施例二提供的一种汽车的抬头显示装置的硬件结构示意图；
图11是图10所示汽车的抬头显示装置中投影光学系统的光路结构示意图。
具体实施方式
下面结合具体实施例对本申请进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本申请，但不以任何形式限制本申请。应当指出的是，对本领域的普通技术人员来说，在不脱离本申请构思的前 提下，还可以做出若干变形和改进。这些都属于本申请的保护范围。
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，如果不冲突，本申请实施例中的各个特征可以相互结合，均在本申请的保护范围之内。另外，虽然在装置示意图中进行了功能模块划分，但是在某些情况下，可以以不同于装置中的模块划分。此外，本文所采用的“第一”、“第二”等字样并不对数据和执行次序进行限定，仅是对功能和作用基本相同的相同项或相似项进行区分。
为了便于连接结构限定，本申请以光束的出光方向为参考进行部件的位置限定。本说明书所使用的术语“上”、“下”、“左”、“右”、“竖直”、“水平”以及类似的表述只是为了说明的目的。为了便于连接结构限定，本申请以光束的出光方向为参考进行部件的位置限定。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本说明书中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
此外，下面所描述的本申请各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
为了解决现有的汽车抬头显示装置中，只能够显示一种图像画面，不能够同时显示近景图像和远景图像，和/或同时显示二维图像和三维这类需要同时显示两种图像画面的情况，本申请实施例提供了一种双远心投影镜头，该镜头中，DMD芯片配置为同时出射两个图像，且在所述DMD芯片同时出射两个图像时，同时出射的所述两个图像经所述双远心 投影镜头出射后成像在不同位置上，从而实现在两个不同的位置分别实现不同的显示内容和画面，且采用本申请实施例提供的双远心投影镜头，成像效果好、装置体积小。
图1为本申请实施例提供的双远心投影镜头的其中一种应用环境的示意图，图2为图1所示应用场景中前挡风玻璃的成像图。其中，该应用环境中包括：汽车1，所述汽车1包括：前挡风玻璃A和抬头显示装置B。
所述抬头显示装置B中的投影光学系统10采用了本申请实施例提供的双远心投影镜头100以实现两种图像画面的成像显示，所述双远心投影镜头100输出的第一图像P1和第二图像P2的光束能够通过投影光学系统10中的第一镜头11和第二镜头12分别输出第一图像P1和第二图像P2。
在本应用场景中，所述第一图像P1主要用于显示二维图像，例如，所述汽车1的驾驶信息，所述驾驶信息包括但不限于所述汽车1的车速信息，油量信息等，基于此，所述汽车1上应当相应配置有车速传感器、油量传感器等，具体地，所述二维图像的设置、所述汽车1的驾驶信息的设置以及相应的传感器设置可根据实际需要进行选择，不需要拘泥于本申请应用场景的限定。
在本应用场景中，所述第二图像P2主要用于显示三维图像，也即是AR画面，例如，所述汽车1所在道路的路况信息，所述路况信息包括但不限于所述汽车1所在道路上的车道、道路标线、斑马线、障碍物、红绿灯、指示牌等，基于此，所述汽车1上应当相应配置有摄像头、激光雷达等检测设备，进一步地，若所述汽车1能够实现导航功能，还可以将导航指示信息叠加在所述路况信息上一起显示，具体地，所述三维图像的设置、所述汽车1所在道路的路况信息以及相应的检测设备的设 置可根据实际需要进行选择，不需要拘泥于本申请应用场景的限定。
在本应用场景中，所述前挡风玻璃A优选能够清晰成像且透光度好的玻璃材料制成，具体地，可根据实际需要进行选择，不需要拘泥于本申请应用场景的限定。
具体地，下面结合附图，对本申请实施例作进一步阐述。
实施例一
本申请实施例提供了一种双远心投影镜头，应用于汽车的抬头显示装置中的投影光学系统，所述汽车的抬头显示装置可以是如上述应用场景所示的汽车1的抬头显示装置B，请参见图3和图4，其分别示出了本申请实施例提供的一种双远心投影镜头的光路和结构，所述双远心投影镜头100从像面M到DMD芯片110之间依次设置的：前组透镜120、后组透镜130、和等效棱镜140。
其中，所述前组透镜120包括依次设置的第一透镜121、第二透镜122、第三透镜123、第四透镜124和第五透镜125，所述后组透镜130包括依次设置的第六透镜136、第七透镜137、第八透镜138和第九透镜139，所述第三透镜123和所述第四透镜124组成一个双胶合透镜，该双胶合透镜能够对球差、色差和二级光谱具有良好校正能力；所述DMD芯110片配置为同时出射两个图像，且在所述DMD芯片110同时出射两个图像时，同时出射的所述两个图像经所述双远心投影镜头100出射后成像在不同位置上。
具体地，所述第一透镜121、所述第二透镜122、所述第三透镜123、所述第四透镜124、所述第五透镜125，所述第六透镜136、所述第七透镜137、所述第八透镜138和所述第九透镜139皆为球面透镜。所述第一透镜121的像侧面S1为凹面、物侧面S2为凸面；所述第二透镜122 的像侧面S3为凸面、物侧面S4为凸面；所述第三透镜123的像侧面S5为凹面、物侧面S6为凹面；所述第四透镜124的像侧面S6为凸面、物侧面S7为凸面；所述第五透镜125的像侧面S8为凸面、物侧面S9为凸面；所述第六透镜136的像侧面S10为凹面、物侧面S11为凹面；所述第七透镜137的像侧面S12为凹面、物侧面S13为凸面；所述第八透镜138的像侧面S14为凸面、物侧面S15为凸面；所述第九透镜139的像侧面S16为凸面、物侧面S17为凹面。需要说明的是，所述第三透镜123的物侧面S6和所述第四透镜124的像侧面S6为完全贴合的两个面，此处标注为同一个面。
所述等效棱镜140的作用是把光线偏折，将照明光路和成像光路分离，以免产生干涉。优选地，请一并参见图3，其示出了本申请实施例提供的另一种双远心投影镜头的结构，在图3所示实施例中，所述等效棱镜140为一转向棱镜且为一直角三棱镜，其一直角面与所述DMD芯片110的出光面相对，其另一直角面与所述后组透镜130的入光侧相对，其斜面的反射角度为90度，且有，所述DMD芯片110的光轴与所述前组透镜120和所述后组透镜130的光轴垂直。
所述DMD芯片110包括该DMD芯片110的有效面111以及该DMD芯片110的保护玻璃112，所述DMD芯片110用于出射用于成像的光束，在本申请实施例中，所述DMD芯片110如图所示分为上下两个区域，分别用于出射两种用于成像的光束。
具体地，如下表1所示，为本申请实施例提供的双远心投影镜头100的一组实际设计参数，在该设计参数下，本申请实施例提供的双远心投影镜头100的光学总长能够控制在150mm，且该双远心投影镜头100的有效焦距为90mm，该双远心投影镜头100的放大倍率为1:1，该双远心 投影镜头的相对孔径为2。
镜面编号 曲率半径(mm) 厚度(mm) 玻璃材料
S1 -430 7 H-ZLAF78B
S2 -70 3  
S3 43.2 8 H-ZPK5
S4 -51 9  
S5 -20 5 F13
S6 26.0 9 H-LAK4L
S7 -22 3  
S8 16.2 6 N-FK51A
S9 -82 5  
S10 -30 4 H-ZBAF4
S11 15 6  
S12 -9.0 4 H-ZF52
S13 -12.0 2  
S14 285.5 8 H-LAK4L
S15 -35 1  
S16 23 6 H-ZLAF78B
S17 28.3 0  
表1
基于图3和图4所示双远心投影镜头及表1所示双远心投影镜头的实际设计参数，可得到如图6至图9所示的能够表征该双远心投影镜头100在全视场全波段的成像质量图。具体地，
图6是本申请实施例提供的双远心投影镜头的全视场传递函数MTF值示意图，如图6所示，所述双远心投影镜头100的全视场光学传递函数MTF>40％。
图7是本申请实施例提供的双远心投影镜头的全视场全波段的场曲与畸变图，其中，左边的是场曲图，右边是畸变图，如图7所示，所述双远心投影镜头100的场曲控制在<0.2mm内，畸变控制在<0.5％内。
图8是本申请实施例提供的双远心投影镜头的全视场全波段的的垂轴色差图，如图8所示，所述双远心投影镜头100的垂轴色差不超过1μm。
图9是本申请实施例提供的双远心投影镜头的全视场的点列图，如图9所示，所述双远心投影镜头100的rms半径控制在5.0μm<RMS<8μm。
实施例二
本申请实施例提供了一种汽车的抬头显示装置，其可以是如上述应用场景所示的汽车1的抬头显示装置B，请参见图10和图11,其中，图10示出了本申请实施例提供的一种汽车的抬头显示设备的结构，图11示出了图10所示汽车1的抬头显示装置B中的投影光学系统的光路结构，所述汽车1的抬头显示装置B设置有一能够将第一图像P1和第二图像跑P2投影在所述汽车1的前挡风玻璃A上实现成像的投影光学系统10，所述投影光学系统10包括：如上述实施例一所述的双远心投影镜头100，以及，第一镜头11、第二镜头12、分光装置13、第一反光单元14和第二反光单元15。
其中，所述双远心投影镜头100为实施例一所述的双远心镜头100，其结构、连接关系、设置位置、光路等具体请参考实施例一所述的具体实施例，此处不再描述。
所述分光装置13，其光学中心设置在所述双远心投影镜头100的像面上，且其入光侧朝向所述双远心投影镜头100的出光侧设置；进一步地，所述分光装置13包括第一反射结构13a和第二反射结构13b，其中，所述第一反射结构13a用于接收并反射所述第一图像的光束，所述第二反射结构13b用于接收并反射所述第二图像的光束，所述第一反射结构13a的反光侧即为所述分光装置13的第一反光侧，所述第二反射结构13b的反光侧即为所述分光装置13的第二反光侧。可选地，所述第一反射结构13a和所述第二反射结构13b为反射镜，或者，所述第一反射结构13a和所述第二反射结构13b为反射镜与滤波片、高反膜和/或增透 镜的组合。
所述第一反光单元14，其入光侧朝向所述分光装置13的第一反光侧设置；所述第一反射单元14为反射镜，其呈预设角度设置在所述分光装置13和所述第一镜头11之间，所述第一反射单元14还可以包括镀设在所述反射镜上的高反膜，以实现对光束的全部反射，在本申请图11所示实施例中，所述第一反光单元14的斜面的反射角度为90度，在其他的一些设置中，所述所述第一反光单元14及其角度的设置可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
所述第一镜头11，其入光侧朝向所述第一反光单元14的反光侧设置，其出光侧用于出射所述第一图像；具体地，所述第一镜头11可以是单一一个镜片，也可以是由多个镜片组成的镜片组，其也可以包含其他的光学器件，在实际使用场景中，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
所述第二反光单元15，其入光侧朝向所述分光装置13的第二反光侧设置；所述第二反射单元15为反射镜，其呈预设角度设置在所述分光装置13和所述第二镜头12之间，所述第二反光单元15还可以包括镀设在所述反射镜上的高反膜，以实现对光束的全部反射，在本申请图11所示实施例中，所述第二反光单元15的斜面的反射角度为90度，在其他的一些设置中，所述所述第二反光单元15及其角度的设置可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
所述第二镜头12，其入光侧朝向所述第二反光单元15的反光侧设置，其出光侧用于出射所述第二图像。具体地，所述第二镜头12可以是单一一个镜片，也可以是由多个镜片组成的镜片组，其也可以包含其他的光学器件，在实际使用场景中，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
本申请实施例中提供了一种双远心投影镜头，所述双远心投影镜头包括从像面到DMD芯片之间依次设置的：前组透镜、后组透镜和等效棱镜；其中，所述前组透镜包括依次设置的第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，所述后组透镜包括依次设置的第六透镜、第七透镜、第八透镜和第九透镜，所述第三透镜和所述第四透镜组成一个双胶合透镜；所述DMD芯片配置为同时出射两个图像，且在所述DMD芯片同时出射两个图像时，同时出射的所述两个图像经所述双远心投影镜头出射后成像在不同位置上，本申请实施例提供的双远心投影镜头能够应用于汽车的抬头显示装置中的投影光学系统中，以实现两种画面的同时投影成像，且成像效果好。
需要说明的是，以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；在本申请的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，步骤可以以任意顺序实现，并存在如上所述的本申请的不同方面的许多其它变化，为了简明，它们没有在细节中提供；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (10)

  1. 一种双远心投影镜头，其特征在于，应用于汽车的抬头显示装置中的投影光学系统，所述双远心投影镜头包括从像面到DMD芯片之间依次设置的：前组透镜、后组透镜和等效棱镜；其中，
    所述前组透镜包括依次设置的第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，所述后组透镜包括依次设置的第六透镜、第七透镜、第八透镜和第九透镜，所述第三透镜和所述第四透镜组成一个双胶合透镜；
    所述DMD芯片配置为同时出射两个图像，且在所述DMD芯片同时出射两个图像时，同时出射的所述两个图像经所述双远心投影镜头出射后成像在不同位置上。
  2. 根据权利要求1所述的双远心投影镜头，其特征在于，
    所述第一透镜的像侧面为凹面、物侧面为凸面；
    所述第二透镜的像侧面为凸面、物侧面为凸面；
    所述第三透镜的像侧面为凹面、物侧面为凹面；
    所述第四透镜的像侧面为凸面、物侧面为凸面；
    所述第五透镜的像侧面为凸面、物侧面为凸面；
    所述第六透镜的像侧面为凹面、物侧面为凹面；
    所述第七透镜的像侧面为凹面、物侧面为凸面；
    所述第八透镜的像侧面为凸面、物侧面为凸面；
    所述第九透镜的像侧面为凸面、物侧面为凹面。
  3. 根据权利要求2所述的双远心投影镜头，其特征在于，
    所述等效棱镜为一转向棱镜且为一直角三棱镜，其一直角面与所述DMD芯片的出光面相对，其另一直角面与所述后组透镜的入光侧相对，其斜面的反射角度为90度，
    且有，所述DMD芯片的光轴与所述前组透镜和所述后组透镜的光轴垂直。
  4. 根据权利要求3所述的双远心投影镜头，其特征在于，
    所述双远心投影镜头的焦距为90mm，所述双远心投影镜头的总长为150mm。
  5. 根据权利要求4所述的双远心投影镜头，其特征在于，
    所述双远心投影镜头的放大倍率为1:1，所述双远心投影镜头的相对孔径为2。
  6. 一种汽车的抬头显示装置，其特征在于，设置有一能够将第一图像和第二图像投影在所述汽车的前挡风玻璃上实现成像的投影光学系统，所述投影光学系统包括：
    如上述权利要求1-5任一项所述的双远心投影镜头，所述双远心投影镜头配置为能够同时出射所述第一图像和所述第二图像的光束；以及，
    分光装置，其光学中心设置在所述双远心投影镜头的像面上，且其入光侧朝向所述双远心投影镜头的出光侧设置；
    第一反光单元，其入光侧朝向所述分光装置的第一反光侧设置；
    第一镜头，其入光侧朝向所述第一反光单元的反光侧设置，其出光 侧用于出射所述第一图像；
    第二反光单元，其入光侧朝向所述分光装置的第二反光侧设置；
    第二镜头，其入光侧朝向所述第二反光单元的反光侧设置，其出光侧用于出射所述第二图像。
  7. 根据权利要求6所述的抬头显示装置，其特征在于，
    所述分光装置包括第一反射结构和第二反射结构，其中，所述第一反射结构用于接收并反射所述第一图像的光束，所述第二反射结构用于接收并反射所述第二图像的光束，所述第一反射结构的反光侧即为所述分光装置的第一反光侧，所述第二反射结构的反光侧即为所述分光装置的第二反光侧。
  8. 根据权利要求7所述的抬头显示装置，其特征在于，
    所述第一反射结构和所述第二反射结构为反射镜。
  9. 根据权利要求7所述的抬头显示装置，其特征在于，
    所述第一反射结构和所述第二反射结构为反射镜与滤波片、高反膜和/或增透镜的组合。
  10. 根据权利要求6-9任一项所述的抬头显示装置，其特征在于，
    所述第一反射单元和所述第二反射单元为反射镜。
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