CN115407511A - Vehicle and method for determining surface shape of reflector - Google Patents

Vehicle and method for determining surface shape of reflector Download PDF

Info

Publication number
CN115407511A
CN115407511A CN202211052525.0A CN202211052525A CN115407511A CN 115407511 A CN115407511 A CN 115407511A CN 202211052525 A CN202211052525 A CN 202211052525A CN 115407511 A CN115407511 A CN 115407511A
Authority
CN
China
Prior art keywords
image
wavefront
virtual image
magnification
size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211052525.0A
Other languages
Chinese (zh)
Inventor
刘娟
姚吉
王树利
王晓彤
徐兴红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Group Holding Co Ltd
Original Assignee
Hisense Group Holding Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hisense Group Holding Co Ltd filed Critical Hisense Group Holding Co Ltd
Priority to CN202211052525.0A priority Critical patent/CN115407511A/en
Publication of CN115407511A publication Critical patent/CN115407511A/en
Priority to PCT/CN2022/142811 priority patent/WO2023241003A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • 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
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam
    • 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
    • G02B2027/0147—Head-up displays characterised by optical features comprising a device modifying the resolution of the displayed image

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)

Abstract

The application discloses a method for determining the surface type of a vehicle and a reflector, and belongs to the technical field of optics. The method comprises the following steps: the method comprises the steps of obtaining the size of a virtual image and the resolution of the virtual image detected by an image detection device, determining the magnification required by the wavefront corrector based on the size of the virtual image and the resolution of the virtual image, and adjusting the surface type of a reflector of the wavefront corrector based on the magnification to adjust the size and the resolution of the virtual image. This application is through the face type of the speculum of adjusting the wave front unscrambler to the magnification that makes the wave front unscrambler can satisfy the actual required magnification of wave front unscrambler, makes the projector pass through the size matching of the required image source of image source and the optical imaging module of wave front unscrambler projection on the diffusion barrier, in order to reach full version demonstration, thereby makes the resolution ratio of projector fully utilized.

Description

Vehicle and method for determining surface shape of reflector
Technical Field
The present disclosure relates to optical technologies, and in particular, to a method for determining a surface type of a vehicle and a reflector.
Background
At present, many vehicles have carried the new line Display (HUD), can throw driving information such as navigation information, speed of a motor vehicle on front windshield through HUD, and the driver need not bow just can know important driving information to reduce the potential safety hazard of driving, make the safety that the process of driving is more safe.
In the related art, the HUD mainly includes an image generation module and an optical imaging module. The image generation module comprises a projector, a plane mirror and a diffusion film which are sequentially arranged along a light path. The image generation module is used for providing an image source, and the optical imaging module is used for projecting the image source provided by the image generation module onto a front windshield of the vehicle.
However, the size of the image source required by the optical imaging module is in a direct proportion to the image distance of the projector in the image generation module, and when the size of the image source required by the optical imaging module is larger, the image distance of the projector is larger, which results in a larger volume of the image generation module, and further results in a larger volume of the whole HUD. Moreover, the resolution of the projector cannot be fully utilized because the size of the image source projected onto the diffuser film by the projector does not match the size of the image source required by the optical imaging module.
Disclosure of Invention
The application provides a method for determining the surface type of a vehicle and a reflector, which can solve the problems that the HUD in the related art has a large volume and cannot fully utilize the resolution of a projector. The technical scheme is as follows:
in one aspect, a vehicle is provided, the vehicle having a head-up display HUD, the HUD including an image generation module and an optical imaging module, the image generation module including a projector, a wavefront corrector, and a diffuser film arranged in sequence along an optical path, an image distance of the projector being fixed;
the face shape of the reflector of the wavefront corrector is obtained by adjusting the magnification required by the wavefront corrector, the magnification required by the wavefront corrector is determined by the size of a virtual image and the resolution of the virtual image, and the virtual image is an image formed in front of the vehicle after an image source provided by the projector is projected to a front windshield of the vehicle.
On the other hand, the method for determining the surface type of the reflector is applied to a wavefront controller in a HUD test system, the HUD test system further comprises a HUD and image detection equipment, the HUD comprises an image generation module and an optical imaging module, the image generation module comprises a projector, a wavefront corrector and a diffusion film which are sequentially arranged along an optical path, and the image distance of the projector is fixed; the method comprises the following steps:
acquiring the size of a virtual image and the resolution of the virtual image detected by the image detection equipment, wherein the virtual image is an image formed in front of the vehicle after an image source provided by the projector is projected to a front windshield of the vehicle;
determining a magnification required by the wavefront corrector based on the size of the virtual image and the resolution of the virtual image;
based on the magnification, adjusting the surface shape of a reflector of the wavefront corrector to adjust the size and resolution of the virtual image.
In another aspect, there is provided a surface type determining apparatus of a mirror, the apparatus including:
the acquisition module is used for acquiring the size of a virtual image detected by the image detection equipment and the resolution of the virtual image, wherein the virtual image is an image formed in front of the vehicle after an image source provided by the projector is projected to a front windshield of the vehicle;
a determination module for determining a magnification required by the wavefront corrector based on a size of the virtual image and a resolution of the virtual image;
and the adjusting module is used for adjusting the surface type of a reflector of the wavefront corrector based on the magnification so as to adjust the size and the resolution of the virtual image.
In another aspect, a computer-readable storage medium is provided, in which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the above-mentioned mirror profile determining method.
In another aspect, a computer program product is provided, which comprises instructions that, when run on a computer, cause the computer to perform the steps of the above-described mirror profile determination method.
The technical scheme provided by the application can bring the following beneficial effects at least:
because the reflector in the image generation module in the embodiment of the application is the wavefront corrector, under the condition that the image distance of the projector is fixed, the surface type of the reflector of the wavefront corrector can be adjusted, so that the amplification factor of the wavefront corrector can meet the amplification factor actually required by the wavefront corrector, an image source projected onto the diffusion film by the projector through the wavefront corrector is matched with the size of the image source required by the optical imaging module, full-page display is achieved, and the resolution of the projector is fully utilized. In this way, by determining the surface shape of the mirror of the wavefront corrector in the HUD, the HUD finally mounted on the vehicle can make full use of the resolution of the projector. Moreover, the method provided by the embodiment of the application can determine the image distance of the projector in advance, further enable the appearance design of the HUD to be carried out in advance, and further shorten the design time of the whole HUD.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a size of an image source according to an embodiment of the present application;
FIG. 2 is a complete optical path diagram of a HUD testing system provided by an embodiment of the present application;
fig. 3 is a schematic structural distribution diagram of an image generation module according to an embodiment of the present disclosure;
FIG. 4 is a flowchart of a method for determining a surface type of a reflector according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of a face selection interface provided by an embodiment of the present application;
FIG. 6 is a diagram illustrating a parameter setting interface according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another image source scale provided by an embodiment of the present application;
FIG. 8 is a schematic diagram of a wavefront corrector provided by an embodiment of the present application;
fig. 9 is a schematic structural diagram of a mirror surface shape determining apparatus according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Before explaining the method for determining the surface type of the reflector provided in the embodiment of the present application in detail, an application scenario related to the embodiment of the present application will be introduced.
Currently, the HUD mainly includes an image generation module and an optical imaging module. The image generation module comprises a projector, a plane mirror and a diffusion film which are sequentially arranged along a light path. The image generation module is used for providing an image source, and the optical imaging module is used for projecting the image source provided by the image generation module onto a front windshield of the vehicle. However, the size of the image source required by the optical imaging module is in a direct proportion to the image distance of the projector in the image generation module, and when the size of the image source required by the optical imaging module is larger, the image distance of the projector is larger, which results in a larger volume of the image generation module, and further results in a larger volume of the whole HUD. Moreover, the resolution of the projector cannot be fully utilized because the size of the image source projected onto the diffuser film by the projector does not match the size of the image source required by the optical imaging module.
Therefore, in the embodiment of the present application, the image distance of the projector is fixed. In this case, the surface shape of the mirror of the wavefront corrector can be determined by the HUD testing system, so that the size of the image source projected onto the diffusion film by the projector matches the size of the image source required by the optical imaging module, thereby achieving the purpose of fully utilizing the resolution of the projector, and avoiding the problem of unmatched size of the image source shown in fig. 1. Moreover, when the image distance of the projector is small, the size of the image generation module can be reduced, and the purpose of reducing the size of the whole HUD is achieved. In this way, after the face shape of the mirror of the wavefront corrector in the HUD is determined by the HUD test system, the HUD finally mounted on the vehicle can be made to make full use of the resolution of the projector.
Referring to fig. 2, fig. 2 is a complete optical path diagram of a HUD testing system according to an embodiment of the present disclosure. Wherein, this HUD test system includes HUD, image check out test set and wavefront controller, and HUD mainly includes image generation module and optical imaging module, and image generation module includes along projecting apparatus, wavefront unscrambler and the diffusion barrier that the light path arranged in proper order. Wherein, the wave front controller can be respectively connected with the image detection device and the wave front corrector in a communication way. The communication connection may be a wired connection or a wireless connection, which is not limited in this embodiment of the present application.
The image generation module is used for providing an image source, and the optical imaging module is used for projecting the image source provided by the image generation module onto a front windshield of the vehicle so as to form a virtual image in front of the vehicle. The image detection device is used for detecting the size of the virtual image and the resolution of the virtual image and sending the data to the wavefront controller. The wavefront controller is used for acquiring the size of a virtual image detected by the image detection equipment and the resolution of the virtual image, determining the magnification required by the wavefront corrector based on the size of the virtual image and the resolution of the virtual image, and adjusting the surface shape of a reflector of the wavefront corrector based on the magnification to adjust the size and the resolution of the virtual image.
Optionally, the HUD testing system further comprises a wavefront sensor co-located with the image detection device. Wherein the wavefront controller and the wavefront sensor are communicatively connectable. The communication connection may be a wired connection or a wireless connection, which is not limited in this embodiment of the present application.
The wavefront sensor is configured to detect wavefront distortion data and send the wavefront distortion data to a wavefront controller. The image detection device is also used for detecting the distortion data of the virtual image and the offset data of the virtual image and sending the distortion data of the virtual image and the offset data of the virtual image to the wavefront controller. The wavefront controller acquires wavefront distortion data detected by the wavefront sensor, distortion data of a virtual image and offset data of the virtual image, which are detected by the image detection device, determines wavefront aberration based on the wavefront distortion data, and then adjusts the surface type of a reflector of the wavefront corrector based on the magnification required by the wavefront corrector, the distortion data of the virtual image, the offset data of the virtual image and the wavefront aberration.
Referring to fig. 3, fig. 3 is a schematic diagram showing a structural distribution of the image generation module, wherein the projector is located on the left side of the wavefront corrector, and the diffusion film is located on the upper portion of the wavefront corrector. Of course, the projector and the wavefront corrector in the image generation module may also be placed in other ways according to actual situations. The structural distribution diagram of the image generation module shown in fig. 3 is only for better illustrating the structural distribution of the image generation module, and does not constitute a limitation to the embodiment of the present application.
The execution main body of the method for determining the surface type of the reflecting mirror provided by the embodiment of the application is a wave front controller. The wave front controller can be any electronic product which can be interacted with a user in a man-machine mode through one or more modes of a keyboard, a touch pad, a touch screen, a remote controller, voice interaction or handwriting equipment and the like.
It should be noted that the application scenario and the execution subject described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it is known by a person skilled in the art that with the appearance of a new application scenario and an electronic device, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
Next, a method for determining the surface shape of the mirror provided in the embodiments of the present application will be explained in detail.
Fig. 4 is a flowchart of a method for determining a surface type of a reflector according to an embodiment of the present disclosure, and is applied to a wavefront controller in an HUD test system, where the HUD test system further includes an HUD and an image detection device, the HUD includes an image generation module and an optical imaging module, the image generation module includes a projector, a wavefront corrector, and a diffusion film, which are sequentially arranged along an optical path, and an image distance of the projector is fixed. It should be noted that the above description of the image generation module is only an example, and in practical applications, the image generation module may also include more or less other components, or combine some components, or adopt different component arrangements. The embodiment of the present application does not limit this.
Referring to fig. 4, the method includes the following steps.
Step 401: the wavefront controller acquires the size of a virtual image detected by the image detection device and the resolution of the virtual image, and the virtual image is an image formed in front of a vehicle after an image source provided by the projector is projected to a front windshield of the vehicle.
In some embodiments, the image detection device may detect the virtual image to obtain a size of the virtual image and a resolution of the virtual image. In this way, the wavefront controller can acquire the size of the virtual image and the resolution of the virtual image detected by the image detection apparatus.
The size of the virtual image comprises the size in the horizontal direction and the size in the vertical direction, and the resolution of the virtual image comprises the number of pixels contained in the horizontal direction and the number of pixels contained in the vertical direction.
Step 402: the wavefront controller determines the magnification required by the wavefront corrector based on the size of the virtual image and the resolution of the virtual image.
The wavefront controller determines a first magnification required by the wavefront corrector based on the size of the virtual image and the size of the target image, and determines a second magnification required by the wavefront corrector based on the resolution of the virtual image and the resolution of the target image, wherein the first magnification and the second magnification are the magnifications required by the wavefront corrector in the horizontal direction and the vertical direction.
In some embodiments, the wavefront controller determines a first horizontal magnification and a first vertical magnification based on the size of the virtual image and the target image size, determines a second horizontal magnification and a second vertical magnification based on the resolution of the virtual image and the target image resolution, and determines the first magnification and the second magnification based on the first horizontal magnification, the first vertical magnification, the second horizontal magnification, and the second vertical magnification.
The target image size is set in advance, and the target image size is related to a ratio of a virtual image to be presented by the HUD, where the ratio is a ratio between a size of the virtual image to be presented by the HUD in a horizontal direction and a size of the virtual image to be presented in a vertical direction. For example, the ratio of the virtual image to be presented by the HUD is 3:1, and in this case, the target image size may be 2102 mm × 698 mm, so that the size of the virtual image to be presented by the HUD in the horizontal direction is 2102 and the size in the vertical direction is 698. And under different conditions, the device can be adjusted according to different requirements. The target image resolution is preset, and is related to the specification of a DMD (Digital Micromirror Device) inside the projector, and can be adjusted according to different requirements under different conditions.
In some embodiments, the size of the virtual image includes a horizontal size and a vertical size, and the target image size includes a horizontal size and a vertical size. In this way, the size of the target image in the horizontal direction may be divided by the size of the virtual image in the horizontal direction to obtain the first horizontal magnification, and the size of the target image in the vertical direction may be divided by the size of the virtual image in the vertical direction to obtain the first vertical magnification.
For ease of understanding, a process of determining the first horizontal magnification and the first vertical magnification is now described by way of example. If the size of the virtual image is 1944 mm × 698 mm, that is, the size of the virtual image in the horizontal direction is 1944, and the size of the virtual image in the vertical direction is 698. The size of the target image is 2102 mm × 698 mm, that is, the size of the target image in the horizontal direction is 2102 and the size in the vertical direction is 698. In this case, the first horizontal magnification is 2102 ÷ 1944 ≈ 1.08, and the first vertical magnification is 698 ÷ 698=1.
Since the optical imaging module is designed based on the target image size in the design of the optical imaging module, the size of the virtual image is consistent with the target image size when the size of the image source required by the optical imaging module matches the size of the image source projected onto the diffusion film by the projector. However, for the size in any one of the horizontal direction and the vertical direction, if the size of the image source projected onto the diffusion film by the projector in the direction is larger than the size of the image source required by the optical imaging module in the direction, a partial area of the image source projected onto the diffusion film in the direction cannot be projected onto the front windshield of the vehicle, and the size of the finally presented virtual image in the direction is consistent with the size of the target image in the direction, but the virtual image substantially presents the content of only a part of the image source. If the size of the image source projected onto the diffusion film by the projector in the direction is smaller than the size of the image source required by the optical imaging module in the direction, the content of the image source projected onto the diffusion film in the direction can be projected onto the front windshield of the vehicle, but the size of the finally presented virtual image in the direction is smaller than the size of the target image in the direction.
That is, as for the size in any one of the horizontal direction and the vertical direction, if the size of the virtual image in the direction coincides with the size of the target image in the direction, the size of the image source projected onto the diffusion film by the projector in the direction is greater than or equal to the size of the image source required by the optical imaging module in the direction, that is, the size of the image source projected onto the diffusion film by the projector and the size of the image source required by the optical imaging module may or may not match. Therefore, the magnification determined based only on the size of the virtual image and the size of the target image is inaccurate.
However, if the size of the image source projected onto the diffuser film by the projector is larger than the size of the image source required by the optical imaging module in the direction, a part of the frame of the image source projected onto the diffuser film in the direction is cut, which results in the number of pixels included in the virtual image in the direction being smaller than the number of pixels included in the target image in the direction. Therefore, the magnification can be determined according to the resolution of the virtual image and the resolution of the target image, and the accuracy of the magnification is improved.
In some embodiments, the resolution of the virtual image includes a number of pixels included in a horizontal direction and a number of pixels included in a vertical direction, and the target image resolution includes a number of pixels included in the horizontal direction and a number of pixels included in the vertical direction. In this way, the number of pixels included in the virtual image in the horizontal direction may be divided by the number of pixels included in the target image in the horizontal direction to obtain the second horizontal magnification, and the number of pixels included in the virtual image in the vertical direction may be divided by the number of pixels included in the target image in the vertical direction to obtain the second vertical magnification.
Since the resolution of the target image is the maximum resolution that the virtual image can present, that is, the number of pixels included in the virtual image in the horizontal and/or vertical direction is less than or equal to the number of pixels included in the target image in the corresponding direction. If the number of pixels included in the virtual image in the horizontal and/or vertical direction is smaller than the number of pixels included in the target image in the corresponding direction, it means that the size of the image source projected onto the diffusion film in the direction is larger than the maximum size of the image source required by the optical imaging module in the direction, and the image source projected onto the diffusion film needs to be reduced. If the number of pixels included in the virtual image in the horizontal and/or vertical direction is equal to the number of pixels included in the target image in the corresponding direction, it means that the size of the image source projected onto the diffusion film in the direction is equal to the maximum size of the image source required by the optical imaging module in the direction, and there is no need to scale the image source projected onto the diffusion film, therefore, in the embodiment of the present application, the number of pixels included in the virtual image in the horizontal direction may be divided by the number of pixels included in the target image in the horizontal direction to obtain a second horizontal magnification, and the number of pixels included in the virtual image in the vertical direction may be divided by the number of pixels included in the target image in the vertical direction to obtain a second vertical magnification, that is, both the second horizontal magnification and the second vertical magnification are less than or equal to 1.
For ease of understanding, the process of determining the second horizontal magnification and the second vertical magnification will now be described by way of example. If the resolution of the virtual image is 854 mm × 315 mm, that is, the number of pixels included in the virtual image in the horizontal direction is 854 and the number of pixels included in the virtual image in the vertical direction is 315. The resolution of the target image is 854 mm × 480 mm, that is, the target image includes 854 pixels in the horizontal direction and 480 pixels in the vertical direction. In this case, the second horizontal magnification is 854 ÷ 854=1, and the second vertical magnification is 315 ÷ 480 ≈ 0.656.
In some embodiments, if the first horizontal magnification is greater than 1, the first horizontal magnification is taken as the first magnification. And if the first horizontal magnification is equal to 1, taking the second horizontal magnification as the first magnification. And if the first vertical magnification is larger than 1, taking the first vertical magnification as the second magnification. And if the first vertical magnification is equal to 1, taking the second vertical magnification as the second magnification.
Since the target image size is the maximum size that can be achieved by the virtual image, the target image resolution is the maximum resolution that can be achieved by the virtual image, and the first horizontal magnification is obtained by dividing the size of the target image in the horizontal direction by the size of the virtual image in the horizontal direction, and the first vertical magnification is obtained by dividing the size of the target image in the vertical direction by the size of the virtual image in the vertical direction, the first horizontal magnification and the first vertical magnification are necessarily equal to or greater than 1.
If the first horizontal magnification is larger than 1, it means that the size of the virtual image in the horizontal direction is smaller than the size of the target image in the horizontal direction, and therefore the first horizontal magnification can be directly used as the first magnification.
If the first horizontal magnification is equal to 1, it indicates that the size of the virtual image in the horizontal direction is equal to the size of the target image in the horizontal direction, and at this time, the size of the image source projected onto the diffuser film by the projector in the horizontal direction may or may not match the size of the image source required by the optical imaging module in the horizontal direction, and the magnification needs to be determined by the number of pixels included in the virtual image in the horizontal direction and the number of pixels included in the target image in the horizontal direction, so that the second horizontal magnification may be used as the first magnification.
If the first vertical magnification is larger than 1, it means that the size of the virtual image in the vertical direction is smaller than the size of the target image in the horizontal direction, and therefore the first vertical magnification can be directly used as the second magnification.
If the first vertical magnification is equal to 1, it means that the size of the virtual image in the vertical direction is equal to the size of the target image in the vertical direction, and at this time, the size of the image source projected onto the diffuser film by the projector in the vertical direction may or may not match the size of the image source required by the optical imaging module in the vertical direction, and the magnification needs to be determined by the number of pixels included in the virtual image in the vertical direction and the number of pixels included in the target image in the vertical direction, so that the second vertical magnification may be used as the second magnification.
For example, the first horizontal magnification is 1.08, the first vertical magnification is 1, the second horizontal magnification is 1, and the second vertical magnification is 0.656. Since the first horizontal magnification is larger than 1, which means that the size of the virtual image in the horizontal direction is smaller than the size of the target image in the horizontal direction, the first horizontal magnification, that is, 1.08 can be directly used as the first magnification. Since the first vertical magnification is equal to 1, which indicates that the size of the virtual image in the vertical direction is equal to the size of the target image in the vertical direction, at this time, the size of the image source projected onto the diffuser film by the projector in the vertical direction may or may not match the size of the image source required by the optical imaging module in the vertical direction, and the magnification needs to be determined by the number of pixels included in the virtual image in the vertical direction and the number of pixels included in the target image in the vertical direction, so that the second vertical magnification can be used as the second magnification. That is, 0.656 is set as the second magnification.
Step 403: the wavefront controller adjusts the profile of the mirror of the wavefront corrector based on the magnification required by the wavefront corrector to adjust the size and resolution of the virtual image.
Determining a target free-form surface equation, wherein each polynomial coefficient in the target free-form surface equation is unknown, determining each polynomial coefficient in the target free-form surface equation based on the magnification required by the wave-front corrector, and adjusting the surface type of a reflector of the wave-front corrector based on the target free-form surface equation with the known polynomial coefficient so that the reflector of the wave-front corrector is a free-form surface represented by the target free-form surface equation with the known polynomial coefficient.
In some embodiments, the wavefront controller may display a face type selection interface including a plurality of face type information indicating a free-form surface equation satisfied by a free-form surface, display a parameter setting interface in response to a selection operation of target face type information, the target face type information being one of a plurality of face type information included in the face type selection interface, acquire a number of polynomial coefficients input in the parameter setting interface, and determine a target free-form surface equation based on the free-form surface equation indicated by the target face type information and the number of polynomial coefficients input in the parameter setting interface.
The wavefront controller stores the corresponding relationship between the surface type information and the free-form surface equation, so that after the wavefront controller displays a surface type selection interface, a user can select target surface type information from the plurality of surface type information as a surface type corresponding to a reflector of the wavefront corrector, at this time, the user can trigger the selection operation of the target surface type information, the wavefront controller receives the selection operation of the target surface type information triggered by the user and displays a parameter setting interface corresponding to the target surface type, the user can set the number of polynomial coefficients in the parameter setting interface, the wavefront controller determines the free-form surface equation corresponding to the target surface type from the corresponding relationship between the surface type information and the free-form surface equation based on the target surface type information, and further determines the target free-form surface equation based on the number of polynomial coefficients and the free-form surface equation corresponding to the target surface type information according to a related algorithm.
In some embodiments, the wavefront controller stores a correspondence between the free-form surface equation and a polynomial coefficient affecting the surface magnification in the free-form surface equation, and thus, after determining the target free-form surface equation, the wavefront controller may determine, based on the target free-form surface equation, a corresponding polynomial coefficient from the correspondence between the free-form surface equation and the polynomial coefficient affecting the surface magnification in the free-form surface equation, as the target polynomial coefficient in the target free-form surface equation, and use the target polynomial coefficient in the target free-form surface equation as a variable, and further determine, based on the magnification required by the wavefront corrector, each polynomial coefficient in the target free-form equation according to a correlation algorithm, thereby obtaining the target free-form surface equation for which the polynomial coefficient is known.
In other embodiments, the parameter setting interface is further configured to set variables in the free-form surface equation, and a user may set target polynomial coefficients as the variables in the target free-form surface equation through the parameter setting interface. Therefore, after the user inputs the number of polynomial coefficients in the parameter setting interface, the target polynomial coefficients in the target free-form surface equation may also be set in the parameter setting interface. At this time, the wavefront controller determines a free-form surface equation corresponding to the target surface type from the corresponding relationship between the surface type information and the free-form surface equation based on the target surface type information, further determines the target free-form surface equation according to a correlation algorithm based on the number of the polynomial coefficients and the free-form surface equation corresponding to the target surface type information, further determines each polynomial coefficient in the target free-form surface equation according to the correlation algorithm based on the magnification factor required by the wavefront corrector and the target polynomial coefficient serving as a variable in the target free-form surface equation, and further obtains the target free-form surface equation with the known polynomial coefficient.
It should be noted that the parameter setting interface may set the number of polynomial coefficients of the free-form surface equation and the target polynomial coefficient as a variable in the target free-form surface equation, and certainly, the parameter setting interface may also set other parameters of the free-form surface, which is not limited in this embodiment of the present application.
Wherein the plurality of surface type information are set in advance, and the plurality of surface type information may be set as an expansion polynomial, a quadric surface, an expansion aspherical surface, and an odd aspherical surface. And under different conditions, the device can be adjusted according to different requirements.
For ease of understanding, the determination of the mirrors of the wavefront corrector will now be described by way of example. For example, referring to fig. 5, the wavefront controller may display a face type selection interface as shown in fig. 5, the user may select an expansion polynomial from the plurality of face type information as a face type corresponding to a mirror of the wavefront corrector, at this time, the user may trigger a selection operation of the expansion polynomial, and the wavefront controller receives the selection operation of the expansion polynomial triggered by the user, and displays a parameter setting interface corresponding to the expansion polynomial. Since the 3 rd and 5 th terms of the coefficients in the free-form surface equation indicated by the expansion polynomial are related to the magnification of the free-form surface, the number of coefficients of the polynomial should be equal to or greater than 5. Referring to fig. 6, the user can set the number of polynomial coefficients to 44 in the parameter setting interface shown in fig. 6, and expand the free-form surface equation indicated by the polynomial to the following formula (1).
Figure BDA0003823926010000111
Wherein, in the above formula (1), z is a rise of the free-form surface in the z-axis direction, x is a rise of the free-form surface in the x-axis direction, y is a rise of the free-form surface in the y-axis direction, c is a curvature of the surface, r is a radial coordinate in a lens unit, k is a conic coefficient, N is the number of polynomial coefficients, a is an unknown quantity, a is a i The coefficients of the polynomial are expanded for the ith term.
In the embodiment of the present application, after determining the free-form surface equation indicated by the extended polynomial, c and k in formula (1) are set to 0, and therefore, the wavefront controller determines the target free-form surface equation as the following formula (2) according to the correlation algorithm based on the number of coefficients of the polynomial and the free-form surface equation indicated by the extended polynomial.
Figure BDA0003823926010000121
Wherein, in the above formula (2), z is a rise of the free-form surface in the z-axis direction, x is a rise of the free-form surface in the x-axis direction, y is a rise of the free-form surface in the y-axis direction, and C 1 To C 44 For each polynomial coefficient in the free-form surface equation.
The wavefront controller stores polynomial coefficients influencing the magnification of the curved surface. Thus, the wavefront controller can determine a target polynomial coefficient in the target free-form surface equation to be C based on the stored polynomial coefficients affecting the surface magnification 3 And C 5 And C is 3 And C 5 As variables, each polynomial coefficient in the target free-form surface equation is determined according to a correlation algorithm based on 1.08 times of magnification required by the wavefront corrector in the horizontal direction, 0.656 times of magnification required by the wavefront corrector in the vertical direction, and the target polynomial coefficient in the target free-form surface equation of the variables,wherein, C 1 、C 2 、C 4 、C 6 To C 44 Is 0, C 3 Is-116.652, C 5 Is-50.122, and the free form surface characterized by the target free form surface equation for which the polynomial coefficients are known is determined to be the mirror of the wavefront corrector.
It should be noted that the above examples of the surface type selection interface and the parameter setting interface are only for better explaining the determination process of the mirror of the wavefront corrector, and constitute a limitation to the embodiments of the present application.
The method provided by the embodiment of the application can be used for simulating through optical simulation software deployed by a wavefront controller. For example, the optical simulation software may be Zemax. At this time, the amplification effect of the wavefront corrector can be simulated through optical simulation software. For example, referring to fig. 7, by performing simulation with optical simulation software, it can be seen that the image source projected onto the diffusion film by the projector through the wavefront corrector completely coincides with the image source required by the optical imaging module, so as to achieve full-scale display.
In some embodiments, the wavefront corrector comprises a plurality of actuators and mirrors. Different actuators and different voltages can produce complex deformations of the mirror. Therefore, the wave front controller can determine a control command according to a relevant algorithm based on the target free-form surface equation with known polynomial coefficients, and then send the control command to the wave front corrector, so that the wave front corrector controls the positions of the plurality of actuators based on the control command to adjust the surface type of the reflecting mirror, and the reflecting mirror of the wave front corrector is a free-form surface represented by the target free-form surface equation with known polynomial coefficients.
As an example, referring to fig. 8, fig. 8 is a schematic structural diagram of a wavefront corrector, in fig. 8, the wavefront corrector includes a base, a plurality of actuators and a mirror, the base is made of a material with high rigidity, and mainly serves to support the structure of the whole wavefront corrector and serve as a fixed substrate during operation. The actuators may be made of piezoelectric or electrostrictive material, and a plurality of actuators are fixed to the substrate in a spatial distribution and connected to the mirror at the top end thereof. The actuator is capable of converting electrical energy into a displacement in the vertical direction, thereby deforming the mirror. The material of the reflector can be optical glass, silicon, metal, etc., and the application embodiment does not limit the material.
Optionally, the type of the wavefront corrector may be a piezoelectric material driven wavefront corrector, an electrostrictive material wavefront corrector, a magnetostrictive material wavefront corrector, an electrostatically driven wavefront corrector, a bimorph wavefront corrector, and an acoustic coil motor wavefront corrector.
Since the optical imaging module is an off-axis reflective optical system, the system may cause a large distortion of a virtual image finally projected onto a front windshield of a vehicle, and positional deviation of respective optical elements may occur upon assembly, which may cause a deviation of the virtual image projected onto the front windshield of the vehicle. In addition, due to the design and operation of the lens and the uneven distribution of refractive index of air, the light beam cannot be focused or transformed in an ideal state, which causes deviation between the actual wavefront and the ideal wavefront of the virtual image, i.e., wavefront distortion, thereby affecting the imaging quality of the virtual image. Accordingly, in some embodiments, the HUD test system further comprises a wavefront sensor, and at this time, the wavefront controller is capable of acquiring distortion data of the virtual image and offset data of the virtual image detected by the image detection device, and acquiring wavefront distortion data detected by the wavefront sensor, the wavefront distortion data indicating a deviation between an actual wavefront and an ideal wavefront of the virtual image, the wavefront controller is capable of determining a wavefront aberration based on the wavefront distortion data, and adjusting a face shape of a mirror of the wavefront corrector based on a magnification required by the wavefront corrector, the distortion data of the virtual image, the offset data of the virtual image, and the wavefront aberration.
The wavefront refers to a surface formed by phase points such as a plurality of light rays in a light beam, and the surface is perpendicular to the propagation direction of each light ray. For example, if the emitted light beam is perfectly parallel, the ideal wavefront of the light beam is a plane, and if the light beam cannot be focused or transformed in a perfect state due to the design and the manufacturing of the lens and the uneven refractive index distribution of the air, the wavefront distortion is generated, and in this case, the wavefront generating the wavefront distortion may be a curved surface.
The image detection equipment detects the virtual image and can also obtain distortion data of the virtual image and offset data of the virtual image. And the wavefront sensor can also detect the virtual image, so as to obtain wavefront distortion data. In this way, the wavefront controller can acquire distortion data of the virtual image and offset data of the virtual image detected by the image detection device, and acquire wavefront distortion data detected by the wavefront sensor.
Alternatively, the wavefront sensor may be a Shack-Hartmann (Shack-Hartmann) wavefront sensor, a curvature sensor, or a Pyramid (Pyramid) wavefront sensor, but the wavefront sensor may also be other wavefront sensors, which is not limited in this embodiment.
In some embodiments, the wavefront controller may determine wavefront aberrations according to a correlation algorithm based on the wavefront distortion data. Alternatively, the wavefront controller may determine the wavefront aberrations according to a wavefront reconstruction algorithm based on the wavefront distortion data. Of course, the wavefront controller may also determine the wavefront aberration according to other algorithms, which is not limited in this application.
It should be noted that the wavefront aberration may include parameters such as prism, defocus, astigmatism, clover, coma, and spherical aberration, which are not limited in this application.
In some embodiments, the wavefront controller determines a target free-form surface equation, each polynomial coefficient in the target free-form surface equation is unknown, determines each polynomial coefficient in the target free-form surface equation based on the magnification required by the wavefront corrector, distortion data of the virtual image, offset data of the virtual image, and wavefront aberration, and adjusts a face type of a mirror of the wavefront corrector based on the target free-form surface equation for which the polynomial coefficient is known, such that the mirror of the wavefront corrector is a free-form surface characterized by the target free-form surface equation for which the polynomial coefficient is known.
For the determination process of the target free-form surface equation, please refer to the corresponding contents in the above, which is not described herein again.
The implementation process of determining each polynomial coefficient in the target free-form surface equation by the wavefront controller based on the required magnification of the wavefront corrector, the distortion data of the virtual image, the offset data of the virtual image and the wavefront aberration comprises the following steps: the wavefront controller determines a value of a first polynomial coefficient based on a magnification required by the wavefront corrector and a target free-form surface equation with unknown polynomial coefficients, determines a value of a second polynomial coefficient based on the value of the first polynomial coefficient and offset data of the virtual image, and determines a value of a third polynomial coefficient based on the value of the first polynomial coefficient, the value of the second polynomial coefficient, distortion data of the virtual image and wavefront aberration, thereby obtaining values of the polynomial coefficients in the target free-form surface equation. The first polynomial coefficient is a polynomial coefficient influencing the magnification of the curved surface, the second polynomial coefficient is a polynomial coefficient influencing the trapezoidal variation, and the value of the third polynomial coefficient is a polynomial coefficient except the first polynomial coefficient and the second polynomial coefficient in the target free-form surface equation.
The specific process of determining the value of the first polynomial coefficient based on the magnification required by the wavefront corrector is the same as the process of determining the polynomial coefficient affecting the curved surface magnification in the target free-form surface equation based on the magnification required by the wavefront corrector, and details are not repeated here.
In some embodiments, the wavefront controller stores a correspondence of the free-form surface equation and a polynomial coefficient of the free-form surface equation that affects the surface magnification, and thus, after determining the target free-form surface equation, the wavefront controller may determine a corresponding polynomial coefficient from the correspondence of the free-form surface equation and the polynomial coefficient of the free-form surface equation that affects the surface magnification as the first polynomial coefficient of the target free-form surface equation and use the first polynomial coefficient of the target free-form surface equation as a variable based on the target free-form surface equation, and further determine a value of the first polynomial coefficient according to a correlation algorithm based on the magnification required by the wavefront corrector.
In the same way as above, the parameter setting interface is also used for setting variables in the free-form surface equation, and a user can set target polynomial coefficients serving as the variables in the target free-form surface equation through the parameter setting interface. Therefore, after the user inputs the number of polynomial coefficients in the parameter setting interface, the first polynomial coefficient in the target free-form surface equation may also be set in the parameter setting interface. At this time, the wavefront controller determines a free-form surface equation corresponding to the target surface type from the corresponding relationship between the surface type information and the free-form surface equation based on the target surface type information, further determines the target free-form surface equation according to a correlation algorithm based on the number of the polynomial coefficients and the free-form surface equation corresponding to the target surface type information, and further determines the value of the first polynomial coefficient in the target free-form surface equation according to the correlation algorithm based on the magnification factor required by the wavefront corrector and the first polynomial coefficient serving as a variable in the target free-form surface equation.
As in the above, the wavefront controller stores the correspondence relationship of the free-form surface equation and the polynomial coefficient affecting the amount of trapezoidal change in the free-form surface equation, and therefore, after determining the value of the first polynomial coefficient, the wavefront controller may determine, as the second polynomial coefficient in the target free-form surface equation, the corresponding polynomial coefficient from the correspondence relationship of the free-form surface equation and the polynomial coefficient affecting the amount of trapezoidal change in the free-form surface equation, based on the target free-form surface equation, and fix the value of the first polynomial coefficient in the target free-form surface equation, take the second polynomial coefficient as a variable, and further determine the value of the second polynomial coefficient in the target free-form surface equation according to a correlation algorithm, based on the offset data of the virtual image.
In other embodiments, after determining the value of the first polynomial coefficient, a second polynomial coefficient in the target free-form surface equation may also be set at the parameter setting interface, and a fixed-value first polynomial coefficient in the target free-form surface equation may also be set. At this time, the value of the second polynomial coefficient in the target free-form surface equation is determined according to the correlation algorithm based on the offset data of the virtual image and the second polynomial coefficient as a variable in the target free-form surface equation.
In some embodiments, after determining the value of the first polynomial coefficient and the value of the second polynomial coefficient, the wavefront controller may determine the value of the third polynomial coefficient in the target free-form surface equation according to a correlation algorithm based on the target free-form surface equation, by using the polynomial coefficients except the first polynomial coefficient and the second polynomial coefficient in the target free-form surface equation as the third polynomial coefficient in the target free-form surface equation, fixing the value of the first polynomial coefficient and the value of the second polynomial coefficient in the target free-form surface equation, and by using the third polynomial coefficient in the target free-form surface equation as a variable, based on the distortion data of the virtual image and the wavefront aberration.
In other embodiments, after determining the value of the first polynomial coefficient and the value of the second polynomial coefficient, a third polynomial coefficient in the target free-form surface equation may be further set at the parameter setting interface, and the first polynomial coefficient and the second polynomial coefficient in the target free-form surface equation with fixed values may be set. At this time, the value of the third polynomial coefficient in the target free-form surface equation is determined according to a correlation algorithm based on the offset data of the virtual image and the third polynomial coefficient as a variable in the target free-form surface equation.
In some embodiments, after determining the value of the first polynomial coefficient, the value of the second polynomial coefficient, and the value of the third polynomial coefficient, the value of the first polynomial coefficient, the value of the second polynomial coefficient, and the value of the third polynomial coefficient are substituted into the target free-form surface equation to obtain a target free-form surface equation with known polynomial coefficients.
For a specific process of adjusting the surface type of the mirror of the wavefront corrector based on the target free-form surface equation with a known polynomial coefficient so that the mirror of the wavefront corrector is a free-form surface represented by the target free-form surface equation with a known polynomial coefficient, reference is made to the corresponding contents in the foregoing, and details are not repeated here.
It should be noted that the method provided in the embodiment of the present application is implemented in a case where the image distance of the projector is fixed, the image distance of the projector is the minimum value within a target image distance range, and the target image distance range refers to an image distance range in which no aberration occurs. The target image distance range is set in advance and is related to optical structure parameters in the projector. As an example, the target image distance range may be set to 90 mm to 130 mm, where the image distance of the projector is 90 mm.
In some embodiments, the light beam emitted from the optical axis of the projector is reflected by the wavefront corrector and then enters perpendicular to the center of the diffusion film, and at this time, the image plane of the projector coincides with the diffusion film, so that the image distance of the projector is the sum of the distance from the lens of the projector to the wavefront corrector, over which the light beam propagating along the optical axis passes, and the distance from the wavefront corrector to the diffusion film, over which the light beam perpendicularly enters from the wavefront corrector.
In other embodiments, the light beam emitted from the projector lens is reflected by the wavefront corrector and then obliquely incident on the diffuser film at an angle, such as 8 degrees to 20 degrees, to account for the problem of solar back-flow. In this case, since the light beam emitted from the projector and propagating along the optical axis is incident on the diffuser at a certain angle, and the image plane of the projector and the diffuser do not overlap with each other, the image distance of the projector is the sum of the distance from the lens of the projector to the wavefront corrector and the distance from the wavefront corrector to the image plane.
Because the reflector in the image generation module in the embodiment of the application is the wavefront corrector, under the condition that the image distance of the projector is fixed, the surface type of the reflector of the wavefront corrector can be adjusted, so that the amplification factor of the wavefront corrector can meet the amplification factor actually required by the wavefront corrector, an image source projected onto the diffusion film by the projector through the wavefront corrector is matched with the size of the image source required by the optical imaging module, full-page display is achieved, and the resolution of the projector is fully utilized. In this way, by determining the surface type of the mirror of the wavefront corrector in the HUD, it is possible to make the HUD finally mounted on the vehicle to make full use of the resolution of the projector. Moreover, the method provided by the embodiment of the application can determine the image distance of the projector in advance, further can lead the appearance design of the HUD to be carried out in advance, and further shortens the design time of the whole HUD. In addition, the method provided by the embodiment of the application can also reduce the image distance of the projector, further reduce the distance of light walking, enable the structure of the image generation module of the HUD to be more compact, further reduce the volume of the image generation module, further achieve the purpose of reducing the volume of the whole HUD, and further correct the distortion of the virtual image, the virtual image offset caused by the position deviation of the optical element during assembly and correct the wavefront distortion, thereby further improving the image quality of the virtual image.
The embodiment of the application provides a vehicle, and the vehicle has the HUD, and this HUD includes image generation module and optical imaging module, and image generation module includes along projecting apparatus, wavefront unscrambler and the diffusion barrier that the light path arranged in proper order, and the image distance of this projecting apparatus is fixed.
The face shape of the reflector of the wavefront corrector is adjusted based on the magnification required by the wavefront corrector, the magnification required by the wavefront corrector is determined based on the size of a virtual image and the resolution of the virtual image, and the virtual image is an image formed in front of a vehicle after an image source provided by a projector is projected to a front windshield of the vehicle.
It should be noted that: the process for determining the surface shape of the reflecting mirror of the wavefront corrector in the vehicle provided by the above embodiment and the embodiment of the method for determining the surface shape of the reflecting mirror belong to the same concept, and the specific implementation process thereof is described in the method embodiment, and is not described again here.
Fig. 9 is a schematic structural diagram of an apparatus for determining a surface shape of a mirror according to an embodiment of the present application, where the apparatus for determining a surface shape of a mirror can be implemented as part or all of a wavefront controller by software, hardware, or a combination of the two. Referring to fig. 9, the apparatus includes: an acquisition module 901, a determination module 902 and an adjustment module 903.
The acquiring module 901 is configured to acquire the size of a virtual image and the resolution of the virtual image detected by the image detecting device, where the virtual image is an image formed in front of a vehicle after an image source provided by a projector is projected onto a front windshield of the vehicle. For the detailed implementation process, reference is made to corresponding contents in the above embodiments, and details are not repeated here.
A determining module 902, configured to determine a magnification required by the wavefront corrector based on the size of the virtual image and the resolution of the virtual image. For the detailed implementation process, reference is made to corresponding contents in the above embodiments, and details are not repeated here.
And an adjusting module 903, configured to adjust a surface type of a mirror of the wavefront corrector based on the magnification, so as to adjust a size and a resolution of the virtual image. For the detailed implementation process, reference is made to corresponding contents in the foregoing embodiments, and details are not repeated here.
Optionally, the adjusting module 903 comprises:
the acquiring unit is used for acquiring distortion data of the virtual image and offset data of the virtual image detected by the image detection equipment and acquiring wavefront distortion data detected by the wavefront sensor, wherein the wavefront distortion data is distortion data of an image source provided by the projector;
a determining unit for determining a wavefront aberration based on the wavefront distortion data;
and the adjusting unit is used for adjusting the surface type of the reflector of the wavefront corrector based on the magnification, the distortion data of the virtual image, the offset data of the virtual image and the wavefront aberration.
Optionally, the adjusting unit comprises:
the first determining subunit is used for determining a target free-form surface equation, and each polynomial coefficient in the target free-form surface equation is unknown;
the second determining subunit is used for determining each polynomial coefficient in the target free-form surface equation based on the magnification, the distortion data of the virtual image, the offset data of the virtual image and the wavefront aberration;
and the adjusting subunit is used for adjusting the surface type of the reflector of the wavefront corrector based on the target free-form surface equation with the known polynomial coefficient, so that the reflector of the wavefront corrector is a free-form surface represented by the target free-form surface equation with the known polynomial coefficient.
Optionally, the wavefront corrector comprises a plurality of actuators and mirrors;
the device also includes:
and the sending module is used for sending a control instruction to the wavefront corrector based on a target free-form surface equation with known polynomial coefficients so that the wavefront corrector controls the positions of the plurality of actuators based on the control instruction to adjust the surface shape of the reflecting mirror.
Optionally, the determining module 902 is specifically configured to:
determining a first magnification required by the wavefront corrector based on the size of the virtual image and the size of the target image;
determining a second magnification required by the wavefront corrector based on the resolution of the virtual image and the resolution of the target image;
the first magnification and the second magnification are the magnifications required by the wavefront corrector in the horizontal direction and the vertical direction.
Optionally, the image distance of the projector is the minimum value in a target image distance range, and the target image distance range refers to an image distance range in which no aberration occurs.
Optionally, the image distance of the projector is 90 mm.
Because the reflector in the image generation module in the embodiment of the application is the wavefront corrector, under the condition that the image distance of the projector is fixed, the surface type of the reflector of the wavefront corrector can be adjusted, so that the amplification factor of the wavefront corrector can meet the amplification factor actually required by the wavefront corrector, an image source projected onto the diffusion film by the projector through the wavefront corrector is matched with the size of the image source required by the optical imaging module, full-page display is achieved, and the resolution of the projector is fully utilized. In this way, by determining the surface shape of the mirror of the wavefront corrector in the HUD, the HUD finally mounted on the vehicle can make full use of the resolution of the projector. Moreover, the method provided by the embodiment of the application can determine the image distance of the projector in advance, further can lead the appearance design of the HUD to be carried out in advance, and further shortens the design time of the whole HUD. In addition, the method provided by the embodiment of the application can also be used for reducing the image distance of the projector and further reducing the light traveling distance, so that the structure of an image generation module of the HUD is more compact, the volume of the image generation module is further reduced, and the purpose of reducing the volume of the whole HUD is further realized.
It should be noted that: in the mirror surface shape determining device provided in the above embodiment, when determining the surface shape of the mirror, only the division of the above functional modules is taken as an example, and in practical applications, the above functions may be distributed to different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. In addition, the embodiment of the device for determining the surface type of the reflector and the embodiment of the method for determining the surface type of the reflector provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
In some embodiments, a computer-readable storage medium is also provided, in which a computer program is stored, which, when being executed by a processor, implements the steps of the method for determining the surface type of the mirror in the above embodiments. For example, the computer readable storage medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
It is noted that the computer-readable storage medium referred to in the embodiments of the present application may be a non-volatile storage medium, in other words, a non-transitory storage medium.
It should be understood that all or part of the steps for implementing the above embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions may be stored in the computer-readable storage medium described above.
That is, in some embodiments, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of the above-described mirror face shape determining method.
It is to be understood that reference herein to "at least one" means one or more and "a plurality" means two or more. In the description of the embodiments of the present application, "/" indicates an alternative meaning, for example, a/B may indicate a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.
It should be noted that the information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals referred to in the embodiments of the present application are authorized by the user or fully authorized by various parties, and the collection, use and processing of the relevant data need to comply with relevant laws and regulations and standards in relevant countries and regions. For example, the size of the virtual image, the resolution of the virtual image, the distortion data of the virtual image, the offset data of the virtual image, and the wavefront distortion data referred to in the embodiments of the present application are all acquired under sufficient authorization.
The above-mentioned embodiments are provided not to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A vehicle is characterized in that the vehicle is provided with a head-up display (HUD), the HUD comprises an image generation module and an optical imaging module, the image generation module comprises a projector, a wavefront corrector and a diffusion film which are sequentially arranged along an optical path, and the image distance of the projector is fixed;
the face shape of the reflector of the wavefront corrector is obtained by adjusting the magnification required by the wavefront corrector, the magnification required by the wavefront corrector is determined by the size of a virtual image and the resolution of the virtual image, and the virtual image is an image formed in front of the vehicle after an image source provided by the projector is projected to a front windshield of the vehicle.
2. The vehicle of claim 1, wherein the image distance of the projector is a minimum value within a target image distance range, the target image distance range being an image distance range in which no aberration occurs.
3. The vehicle of claim 2, wherein the image distance of the projector is 90 millimeters.
4. The method for determining the surface type of the reflector is characterized by being applied to a wavefront controller in an HUD test system, wherein the HUD test system further comprises an HUD and image detection equipment, the HUD comprises an image generation module and an optical imaging module, the image generation module comprises a projector, a wavefront corrector and a diffusion film which are sequentially arranged along an optical path, and the image distance of the projector is fixed; the method comprises the following steps:
acquiring the size of a virtual image detected by the image detection equipment and the resolution of the virtual image, wherein the virtual image is an image formed in front of the vehicle after an image source provided by the projector is projected to a front windshield of the vehicle;
determining a magnification required by the wavefront corrector based on the size of the virtual image and the resolution of the virtual image;
based on the magnification, adjusting the surface shape of a reflector of the wavefront corrector to adjust the size and resolution of the virtual image.
5. The method of claim 4, wherein the HUD testing system further comprises a wavefront sensor;
the adjusting the face shape of the mirror of the wavefront corrector based on the magnification includes:
acquiring distortion data of the virtual image and offset data of the virtual image detected by the image detection equipment, and acquiring wavefront distortion data detected by the wavefront sensor, wherein the wavefront distortion data is distortion data of an image source provided by the projector;
determining a wavefront aberration based on the wavefront distortion data;
adjusting a profile of a mirror of the wavefront corrector based on the magnification, distortion data of the virtual image, offset data of the virtual image, and the wavefront aberration.
6. The method of claim 5, wherein adjusting the profile of the mirror of the wavefront corrector based on the magnification, distortion data of the virtual image, offset data of the virtual image, and the wavefront aberration comprises:
determining a target free-form surface equation, wherein each polynomial coefficient in the target free-form surface equation is unknown;
determining each polynomial coefficient in the target free-form surface equation based on the magnification, distortion data of the virtual image, offset data of the virtual image, and the wavefront aberration;
and adjusting the surface type of the reflector of the wave front corrector based on the target free-form surface equation with known polynomial coefficients so that the reflector of the wave front corrector is a free-form surface represented by the target free-form surface equation with known polynomial coefficients.
7. The method of claim 6, wherein the wavefront corrector comprises a plurality of actuators and mirrors; the method further comprises the following steps:
sending a control command to the wavefront corrector based on a target free-form surface equation with known polynomial coefficients to cause the wavefront corrector to control the positions of the plurality of actuators based on the control command to adjust the profile of the mirror.
8. The method of claim 4, wherein determining the magnification required for the wavefront corrector based on the size of the virtual image and the resolution of the virtual image comprises:
determining a first magnification required by the wavefront corrector based on the size of the virtual image and the size of a target image;
determining a second magnification required by the wavefront corrector based on the resolution of the virtual image and the resolution of the target image;
wherein the first magnification and the second magnification are magnifications required by the wavefront corrector in a horizontal direction and a vertical direction.
9. The method of any of claims 4-8, wherein the image distance of the projector is a minimum value within a target image distance range, the target image distance range being an image distance range in which no aberration occurs.
10. The method of claim 9, wherein the image distance of the projector is 90 millimeters.
CN202211052525.0A 2022-06-13 2022-08-31 Vehicle and method for determining surface shape of reflector Pending CN115407511A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202211052525.0A CN115407511A (en) 2022-08-31 2022-08-31 Vehicle and method for determining surface shape of reflector
PCT/CN2022/142811 WO2023241003A1 (en) 2022-06-13 2022-12-28 Vehicle, method for determining surface type of reflector, and method for determining optical free-form surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211052525.0A CN115407511A (en) 2022-08-31 2022-08-31 Vehicle and method for determining surface shape of reflector

Publications (1)

Publication Number Publication Date
CN115407511A true CN115407511A (en) 2022-11-29

Family

ID=84164817

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211052525.0A Pending CN115407511A (en) 2022-06-13 2022-08-31 Vehicle and method for determining surface shape of reflector

Country Status (1)

Country Link
CN (1) CN115407511A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023241003A1 (en) * 2022-06-13 2023-12-21 海信集团控股股份有限公司 Vehicle, method for determining surface type of reflector, and method for determining optical free-form surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023241003A1 (en) * 2022-06-13 2023-12-21 海信集团控股股份有限公司 Vehicle, method for determining surface type of reflector, and method for determining optical free-form surface

Similar Documents

Publication Publication Date Title
JP6746328B2 (en) Optical system, imaging apparatus and projection apparatus including the same
JP5125147B2 (en) Projection display
JP6650584B2 (en) Head-up display and moving object equipped with head-up display
JP5102940B2 (en) Projection image display device and projection optical unit used therefor
JP6630921B2 (en) Head-up display and moving object equipped with head-up display
JP2017156713A (en) Image capturing device and projection device
JP2007272061A (en) Headup display device
EP2587310A2 (en) Projection optical system, and image display device using the same
CN101140353A (en) Projecting optical unit and projecting type image display apparatus therewith
KR20150106022A (en) Optical System for Focus Adjustable Head Up Display
JP6737291B2 (en) Display device and head-up display
KR100677134B1 (en) Slim projection optical system and image display device
JP4973793B2 (en) Projection optical unit
JP2019028129A (en) Optical system, and imaging apparatus and projection apparatus including the same
JP2017120388A (en) Head-up display and movable body mounting head-up display thereon
CN115407511A (en) Vehicle and method for determining surface shape of reflector
CN113296268B (en) Head-up display device
JP5303740B2 (en) Projection display
JP2019028127A (en) Optical system, and imaging apparatus and projection apparatus including the same
CN112444930A (en) Projection lens, focusing method and device of projection lens and projector
JP2004077825A (en) Projection optical system and projection type picture display device using the same
WO2023241003A1 (en) Vehicle, method for determining surface type of reflector, and method for determining optical free-form surface
JP5126430B2 (en) Projection display
CN207216150U (en) HUD and means of transport
JP2000089227A (en) Projection type display device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination