WO2023272746A1

WO2023272746A1 - Light source apparatus, projection apparatus, light scanning device, and assembly method therefor

Info

Publication number: WO2023272746A1
Application number: PCT/CN2021/104389
Authority: WO
Inventors: 翁德正; 徐彧; 于海
Original assignee: 华为技术有限公司
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2023-01-05
Also published as: CN113678052B; CN113678052A

Abstract

A light source apparatus, a projection apparatus, and a light scanning device. The light source apparatus comprises a first mounting member, which is used for detachably connecting the light source apparatus to another apparatus; a first light generator, the first light generator being disposed on the first mounting member and used to generate a first light beam; and a collimating lens, the collimating lens being disposed on the first mounting member and used to collimate and emit the first light beam. The projection apparatus comprises a second mounting member, the second mounting member being detachably connected to the light source apparatus; and a galvanometer, the galvanometer being disposed on the second mounting member and used to reflect the first light beam from the light source apparatus, the galvanometer swinging to allow the reflected first light beam to be scanned; and the second mounting member is detachably connected to the first mounting member. Therefore, the light source apparatus and the projection apparatus can be separately calibrated, thereby reducing the number of optical elements during calibration and reducing calibration time.

Description

A light source device, a projection device, an optical scanning device and an assembly method thereof

technical field

The invention relates to the technical field of smart cars, to the technical field of vehicle-mounted optical equipment, and in particular to a light source device, a projection device, an optical scanning device and an assembly method thereof.

Background technique

Laser has the advantages of high brightness, high directivity, high monochromaticity, high coherence (coherence mainly describes the phase relationship of each part of the light wave), and long propagation distance. Many optical scanning devices, such as: radar, automotive laser headlights, PGU (Picture Generating Unit, image generation module) in HUD (Head-up display, head-up display), etc., are based on the above advantages of laser. to realize its function.

Taking the PGU in the HUD as an example, it uses MEMS (Micro-electromechanical System, micro-electromechanical system) to drive the laser to scan to generate an image and project it outward. After the projection generated by the PGU is refracted and reflected by the optical components, the image is finally projected onto the front windshield, and then projected into the eyes of the driver after reflection, so that the driver can see the image when looking out of the car through the front windshield. Virtual image. Since the laser light can reach the driver's eyes after multiple refractions and reflections, HUD has very high requirements for the assembly precision of its internal optical components, and multiple optical components need to be calibrated before they can work normally. Therefore, as far as the optical scanning device is concerned, multiple optical elements inside must be calibrated during assembly, which increases the difficulty and time of assembling the optical scanning device and seriously affects the production efficiency of the optical scanning device.

Contents of the invention

The present application provides a light source device, a projection device, an optical scanning device and an assembly method thereof, which can reduce assembly difficulty and time and improve production efficiency.

In order to achieve the above object, the first aspect of the present application provides a light source device, including: a first mounting part for detachably connecting the light source device with other devices; a first light generator, the first light generator is arranged on the first The mounting part is used to generate the first light beam; the collimating lens is arranged on the first mounting part and is used to collimate the first light beam and emit the first light beam. Therefore, optical calibration does not need to be performed after the first light generator, collimating lens and optical components in other devices are all installed, thereby reducing the number of optical components during optical calibration, reducing the time and difficulty of optical calibration. At the same time, since the light source device is detachably connected to other devices through the first mounting part, after the light source device fails, the old light source device can be directly replaced with a new optically calibrated light source device, thereby saving maintenance time. It is also possible to avoid troubleshooting and/or replacement of optical components one by one after the equipment using the light source device fails, thereby improving maintenance efficiency.

As a possible implementation manner of the first aspect, it includes: multiple first light generators; multiple collimating lenses, where the multiple collimating lenses are respectively arranged corresponding to the multiple first light generators. Thus, multiple first light beams can be emitted by multiple first light generators to combine into one beam, thereby improving the brightness of the light source and the range of use of the light source device.

As a possible implementation manner of the first aspect, the first light beam generated by the first light generator is one or a combination of red, blue, and green colors. Thus, the plurality of first light beams can obtain required colors, further improving the use effect of the light source device.

As a possible implementation manner of the first aspect, the light source device further includes: a plurality of dichroic mirrors, and the dichroic mirrors are used to combine multiple first light beams into one beam. In this way, the first light beams with red, blue, green colors or their color combination can be combined into one beam, so as to obtain the required color and increase the brightness of the light beams.

As a possible implementation of the first aspect, a plurality of dichroic mirrors and a plurality of first light generators are respectively arranged correspondingly, and each dichroic mirror in the plurality of dichroic mirrors is used to reflect the first light of a corresponding color. beams, and transmit a first beam of a non-corresponding color. In this way, the first light beams of corresponding colors can be reflected by the dichroic mirror, and the first light beams of other colors can be transmitted, so that multiple first light beams can be combined into one after reflection and transmission, and the desired color and brightness can be obtained.

As a possible implementation manner of the first aspect, the first light beam emitted by the light generator is S-polarized light. Since the reflectivity of S polarized light is greater than that of P polarized light at the same incident angle, the reflectivity of the first light beam can be improved, and the pattern formed by the scanning of the first light beam can be reflected by the front windshield and enter the driver's eyes. The image seen is clearer.

As a possible implementation of the first aspect, the first light beams emitted by some of the multiple light generators are S-polarized light, and the first light beams emitted by another part of the multiple first light generators are P polarized light. Because polarized sunglasses can filter out S polarized light, if the first light beam is all S polarized light, when the driver wears polarized sunglasses, it is difficult to see the pattern reflected by the front windshield. Therefore, the combination of S polarized light and P polarized light for the first light beam can ensure that the driver can still see clear patterns when wearing polarized sunglasses.

As a possible implementation manner of the first aspect, among the plurality of first light generators, the number of light generators emitting the first light beams of red, blue and green colors is the same. It can be understood that the number of light generators respectively emitting the first light beams of red, blue and green colors is the same. In this way, the intensities of the first light beams of red, blue and green colors can be made the same, so that when the first light beams of red, blue and green colors are combined into one beam, it is easier to adjust the white balance of the first light beam color .

As a possible implementation of the first aspect, there are three light generators, which respectively emit first light beams of red, blue, and green colors.

As a possible implementation manner of the first aspect, there are six light generators, which respectively emit first light beams of red, red, blue, blue, green, and green colors. Thus, the light source device can emit the first light beams with different brightness specifications.

As a possible implementation manner of the first aspect, the first light beam is non-visible light. In this way, after the light source device becomes the light source of the radar, it can scan with the invisible light, so as to avoid the influence on the line of sight caused by the first light beam irradiating the human eyes.

The second aspect of the present application provides a projection device, including: a second mounting part for detachably connecting the projection device with other devices; The mirror is oscillated to scan the reflected first light beam. Therefore, it is not necessary to perform optical calibration after all the galvanometers and other optical components in the device are installed, and the optical calibration can be performed on the projection device alone, thereby reducing the number of optical components during optical calibration and reducing the time for optical calibration. Since the projection device is detachably connected with other devices through the second connection part, the projection device after optical calibration can be directly replaced after the projection device fails, thereby saving maintenance time.

As a possible implementation of the second aspect, a micro-electro-mechanical system is also included, and the micro-electro-mechanical system drives a oscillating mirror to oscillate around the fast axis and the slow axis, so that the reflected first beam scans. Thus, a vibrating mirror can be oscillated with the fast axis and the slow axis as the axis, so that the first light beam can be scanned to form an image after being reflected once by the vibrating mirror, which reduces the loss of light and improves the reflection of the projection device efficiency.

As a possible implementation of the second aspect, it also includes a micro-electromechanical system. The vibrating mirror and the micro-electro-mechanical system are two sets corresponding to each other. One micro-electro-mechanical system drives a vibrating mirror to swing around the fast axis, and the other micro-electro-mechanical system The system drives another galvanometer to swing around the slow axis. Therefore, the MEMS only needs to control the oscillating mirror to swing on a fast axis or a slow axis, which makes the structure of the MEMS simpler.

The third aspect of the present application provides an optical scanning device, including a light source device and a projection device; the light source device includes: a first mounting part, used to detachably connect the light source device to other devices; a first light generator, a first light generator The device is arranged on the first mounting part for generating the first light beam; the collimating lens is arranged on the first mounting part for collimating and emitting the first light beam; the projection device includes: the second mounting part, the second The mounting part is detachably connected to the light source device; the vibrating mirror is arranged on the second mounting part for reflecting the first light beam from the light source device, and the vibrating mirror swings to scan the reflected first light beam. Thus, the light scanning device can form an image by scanning the first light beam, so that it can be installed on a vehicle, form image information capable of assisting driving by scanning the light beam, or realize illumination by scanning the first white light beam. At the same time, when assembling the optical scanning device, it is not necessary to perform optical calibration after all the optical components in the vibrating mirror and the light source device are installed, and the optical calibration can be performed on the projection device alone, thereby reducing the number of optical components during optical calibration. Reduce optical alignment time. At the same time, since the projection device is detachably connected to the light source device through the second mounting part, after the light scanning device fails, it can be directly replaced with a new projection device. If the fault is resolved after the replacement of the projection device, it can be confirmed that the projection device has failed , if the fault is not resolved, the fault occurred in another device, so that the location of the fault can be confirmed. In the event of a breakdown of the projection unit, the projection unit can also be replaced directly, saving maintenance time. In addition, it is also possible to select a projection device of appropriate specifications for replacement according to needs, which is convenient for equipment upgrades.

As a possible implementation of the third aspect, the second mounting part is detachably connected to the first mounting part. Thus, the detachable connection between the light source device and the projection device can be realized through the detachable connection between the second mounting part and the first mounting part.

As a possible implementation manner of the third aspect, a lens device detachably connected to the second mounting part is further included; the lens device has a first lens for focusing the first light beam. Thus, the light scanning device can form the PGU in the HUD, and the light scanning device can form a pattern by scanning the first light beam, and can focus the pattern at a predetermined distance after projection. So that the optical scanning device can be set in the HUD, cooperate with the optical elements in the HUD, make the pattern reflect through the front windshield and enter the driver's eyes after a certain amount of refraction and reflection, so that the driver can see through the front windshield See clear virtual images.

As a possible implementation manner of the third aspect, the receiving device further includes: the receiving device has a photoreceptor, and the photoreceptor is configured to sense light reflected back after the first light beam is irradiated on the object. Thus, the radar device can be formed by combining the light source device, the projection device and the receiving device, so that the position and distance of surrounding objects can be detected.

As a possible implementation manner of the third aspect, the first light beam is non-visible light. In this way, it is possible to prevent the driver's line of sight from being affected by the first light beam when the optical scanning device scans and detects the surroundings.

Based on the above, the present application provides a light source device, a projection device, and an optical scanning device. The light source device and the projection device can be optically calibrated independently as separate devices, thereby reducing the number of optical components during optical calibration and reducing the optical calibration time. The optical scanning device can be formed by assembling a light source device and a projection device. Since the light source device and the projection device have been optically calibrated separately, there is no need to perform optical calibration after assembly, which can save assembly time and improve production efficiency. After the light scanning device fails, the location of the fault can be confirmed by replacing the light source device or the projection device, and the repair of the light scanning device can be directly completed by replacing the light source device or the projection device, thereby improving the maintenance efficiency. In addition, light source devices of different specifications can also be replaced as required, thereby facilitating the upgrading of the optical scanning device. Alternatively, by adding a lens device or a receiving device, the optical scanning device can form a PGU or a radar, thereby further improving the range of use of the optical scanning device.

The fourth aspect of the present application provides a method for assembling a light source device, including: pre-assembling the first light generator and the collimator lens on the first mounting part; optically aligning the first light generator and the collimator lens; The optically calibrated first light generator and the collimating lens are fixed on the first installation part.

As a possible implementation of the fourth aspect, the optical calibration of the first light generator and the collimator lens specifically includes: making the first light beam emitted by the first light generator irradiate the beam profiler, and the beam profiler uses To detect the energy and size of the first light beam; adjust the first light generator and collimator lens, so that the energy of the first light beam is greater than or equal to the first energy threshold, adjust the first light generator and collimator lens, so that the first light beam The size of is less than or equal to the first size threshold.

The fifth aspect of the present application provides an assembly method of a projection device, including: pre-assembling the vibrating mirror on the second mounting part; performing optical calibration on the vibrating mirror; and fixing the optically calibrated vibrating mirror to the second mounting part.

As a possible implementation of the fifth aspect, the optical calibration of the oscillating mirror specifically includes: making the second light generator emit a second beam and projecting the second beam onto the beam profiler after being reflected by the galvanizing mirror; The mirror makes the reflected second light beam project to a predetermined position on the profiler.

The sixth aspect of the present application provides an assembly method of an optical scanning device. The optical scanning device includes a light source device and a projection device. The assembly method includes: detachably connecting the light source device and the projection device through a first mounting part and a second mounting part to Obtain an optical scanning device; the light source device includes a first mounting part, a first light generator and a collimating lens, the first light generator and the collimating lens are arranged on the first mounting part, and the first light generator is used to generate a first light beam, The collimating lens is used to collimate the first light beam and emit it; the projection device includes a second mounting part and a vibrating mirror. The vibrating mirror is arranged on the second mounting part to reflect the first light beam from the light source device. of the first beam scan.

As a possible implementation manner of the sixth aspect, the method further includes: detachably connecting a lens device to the light source device, and the lens device is used to focus the first light beam.

As a possible implementation manner of the sixth aspect, the method further includes: detachably connecting the receiving device to the light source device, and the receiving device is configured to sense light reflected back after the first light beam irradiates the object.

A seventh aspect of the present application provides a head-up display system, including any possible implementation of the optical scanning device in the third aspect.

As a possible implementation manner of the seventh aspect, the head-up display system further includes: an optical element, and the optical scanning device projects an image to the optical element. It can be understood that the image is projected onto the optical element and enters human eyes after being reflected.

The eighth aspect of the present application provides a vehicle, including any possible implementation of the optical scanning device in the third aspect; or, any possible implementation of the head-up display system in the seventh aspect.

These and other aspects of the invention will be made more apparent in the following description of the embodiment(s).

Description of drawings

The various features of the present invention and the relationship between the various features are further described below with reference to the accompanying drawings. The drawings are exemplary, some features are not shown to scale, and in some drawings, features customary in the field to which the application pertains and are not necessary for the application may be omitted, or additionally shown for the The application is not an essential feature, and the combination of the various features shown in the drawings is not intended to limit the application. In addition, in the whole specification, the content indicated by the same reference numeral is also the same. The specific accompanying drawings are explained as follows:

FIG. 1 shows a schematic diagram of an application scenario involved in an optical scanning device according to an embodiment of the present application;

Figure 2 is a schematic layout diagram of the optical scanning device of the present application;

FIG. 3 is a schematic diagram of a side structure of a light source device in an embodiment of the present application;

FIG. 4 is a schematic diagram of a side structure of a light source device in an embodiment of the present application;

FIG. 5 is a schematic diagram of a side structure of a light source device in an embodiment of the present application;

FIG. 6 is a schematic diagram of a top direction structure for calibrating a light source device in an embodiment of the present application;

FIG. 7 is a flow chart of a method for assembling a light source device in the embodiment of the present application;

Fig. 8 is a schematic diagram of the top direction structure of a projection device in the embodiment of the present application;

Fig. 9 is a schematic diagram of the top direction structure of a projection device in the embodiment of the present application;

Fig. 10 is a schematic diagram of the top direction structure for calibrating the projection device in the embodiment of the present application;

FIG. 11 is a flowchart of a method for assembling the projection device in the embodiment of the present application;

Fig. 12 is a schematic diagram of the top direction structure of the lens device in the embodiment of the present application;

Fig. 13 is a schematic diagram of the top direction structure of the receiving device in the embodiment of the present application;

Fig. 14 is a schematic diagram of the top direction structure of the mounting seat in the embodiment of the present application;

FIG. 15 is a schematic structural diagram of a light source device in an embodiment of the present application;

FIG. 16 is a schematic structural diagram of an optical scanning device in an embodiment of the present application;

Fig. 17 is a usage scene diagram of the optical scanning device in the embodiment of the present application;

Fig. 18a is another usage scene diagram of the optical scanning device in the embodiment of the present application;

Fig. 18b is another usage scene diagram of the optical scanning device in the embodiment of the present application;

FIG. 19 is a schematic structural diagram of an optical scanning device in an embodiment of the present application;

Fig. 20 is a usage scene diagram of the optical scanning device in the embodiment of the present application;

FIG. 21 is a schematic structural diagram of a possible embodiment of an optical scanning device in the present application;

Fig. 22 is a usage scene diagram of the optical scanning device in the embodiment of the present application;

23 is a schematic diagram of the reflectivity of S-polarized light and P-polarized light at different incident angles;

FIG. 24 is a flowchart of an assembly method of an optical scanning device in an embodiment of the present application.

detailed description

The words "first, second, third" and other similar terms in the description and claims are only used to distinguish similar objects, and do not represent a specific ordering of objects. It is understandable that they can be interchanged where allowed The specific order or sequence is such that the embodiments of the application described herein can be practiced in other sequences than those illustrated or described herein.

The term "comprising" used in the description and claims should not be interpreted as being restricted to what is listed thereafter; it does not exclude other elements or steps. Accordingly, it should be interpreted as specifying the presence of said features, integers or components mentioned, but not excluding the presence or addition of one or more other features, integers or components and groups thereof. Therefore, the expression "apparatus comprising means A and B" should not be limited to an apparatus consisting of parts A and B only.

Reference in this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places in this specification do not necessarily all refer to the same embodiment, but may. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner, as would be apparent to one of ordinary skill in the art from this disclosure, in one or more embodiments.

For optical scanning equipment, whether it is to form an image through beam scanning or to detect the distance of surrounding objects through beam scanning, the beam is usually reflected and/or refracted by multiple optical elements in the optical scanning equipment. In order to realize beam scanning. Therefore, the assembly accuracy of the optical components in the optical scanning device is very high. To realize the normal operation of the optical scanning device, it is necessary to use a dedicated optical calibration device to optically calibrate multiple optical components, thus increasing the cost of the optical scanning device. Assembly difficulty and assembly time have seriously affected the production efficiency of optical scanning equipment.

At the same time, because optical scanning equipment is a highly customized product, the optical specifications, configuration coordinates, and overall volume requirements are different. Therefore, when some components in a certain optical scanning equipment need to be upgraded, the entire optical scanning equipment needs to be upgraded. The equipment is redesigned, which increases the difficulty and cost of upgrading.

On the other hand, when a certain optical component in the optical scanning device fails, it is difficult to locate the faulty optical component because there are so many optical components involved. At the same time, after confirming the faulty optical element and replacing the optical element, multiple optical elements need to be optically calibrated before they can work normally, which seriously affects the maintenance efficiency.

In order to solve the above problems, an optical scanning device is provided in an embodiment of the present application. The specific structure of the optical scanning device in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of an application scenario involved in an

optical scanning device

10, 20, 30 according to an embodiment of the present application. As shown in Figure 1, the optical scanning device 30 of the embodiment of the present application can be installed in the console in the cab of the vehicle 1 to form the PGU of the HUD. The optical scanning device 30 can project images outward, and the images are reflected and refracted by optical elements. , and finally reflected by the windshield into the eyes of the driver, so that when the driver looks out of the car through the front windshield, he can see a virtual image with a certain depth of field (that is, the distance range in which a clear image can be presented before and after the image focus) . The content of the virtual image may include road indication information, speed information of the vehicle 1 , navigation information, audio-visual entertainment system information, etc., so that the driver can understand the information needed to drive the vehicle 1 without shifting his sight when driving the vehicle 1 . Avoid driving risks caused by the driver not being able to take into account the road conditions, such as looking down at the instrument panel or the information on the central control screen when the driver is driving the vehicle 1 .

As shown in Figure 1, the optical scanning device 10 of the embodiment of the present application can also be installed in the headlights or other positions of the vehicle 1 to form an image-type vehicle light, which can realize illumination through beam scanning, and can also form a real image on the road surface through beam scanning , to send image reminders to the driver or other personnel, so as to ensure driving safety.

As shown in FIG. 1 , the optical scanning device 20 of the embodiment of the present application can also be installed on the top, head or tail of the vehicle 1 to form a radar, and scan the surrounding environment through the beam to detect the distance of surrounding objects.

FIG. 2 is a schematic layout diagram of an optical scanning device according to an embodiment of the present application. As shown in FIG. 2 , the optical scanning device of the present application includes: a mounting base 190 ; and a light source device 110 , a projection device 150 , a lens device 170 and a receiving device 180 disposed on the mounting base 190 and detachably connected to the mounting base 190 . The light source device 110 is used to provide the first light beam, and the projection device 150 is arranged on the optical path of the first light beam emitted by the light source device 110, and can reflect the first light beam to the lens device 170, and drive the first light beam to scan back and forth linearly. The receiving device 180 can receive the light signal returned after the first light beam scans the external environment, so as to judge the position of the object in the external environment and the distance to the object. Wherein, the optical scanning device in FIG. 2 can form the optical scanning device 10 by detachably connecting the light source device 110 and the projection device 150 on the mounting base 190; and the receiving device 180 to form the optical scanning device 20 ; or the optical scanning device 30 can be formed by detachably connecting the light source device 110 , the projection device 150 and the lens device 170 on the mount 190 . Meanwhile, the light source device 110 can also be replaced by the following light source device 120 and the light source device 130 ; the projection device 150 can also be replaced by the following projection device 160 .

The light source device 110, the projection device 150, the lens device 170, and the receiving device 180 adopt a modular structure, and the optical elements in the light source device 110 and the projection device 150 can be optically calibrated separately, so that the light source device 110 can be positioned at a predetermined position at a predetermined angle. The first light beam is emitted, so that the projection device 150 can emit the first light beam at a predetermined position and angle after entering the first light beam at a predetermined position and angle. As a result, the number of optical elements that need to be adjusted each time the optical calibration can be reduced, thereby reducing the optical calibration time. After the optical calibration is completed, it is only necessary to install each module at a predetermined position on the mounting base 190 to realize the position fixation between the modules, so that the

optical scanning devices

10, 20, 30 can work normally without aligning the

optical scanning devices

10, 20, and 30. Each optical component of 20, 30 performs overall optical calibration, thereby reducing the difficulty and time of assembling the

optical scanning devices

10, 20, 30 and improving production efficiency. At the same time, the light source device 110 , the projection device 150 , the lens device 170 and the receiving device 180 can be upgraded separately without redesigning the entire optical scanning device 10 , thereby saving development resources and costs. It should be noted that the lens device 170 and the receiving device 180 are optional, adding the lens device 170 or the receiving device 180 to the optical scanning device can make the optical scanning device realize different functions.

On the other hand, when an optical element in the

optical scanning device

10 , 20 , 30 fails, the location of the failure can be confirmed by replacing the light source unit 110 , projection unit 150 , lens unit 170 or receiver unit 180 . For example, after replacing the projection device 150 and eliminating the fault, it can be confirmed that the projection device 150 is faulty, and other devices can work normally. After confirming the location of the fault, it is only necessary to directly replace the faulty light source device 110, projection device 150, lens device 170 or receiving device 180 to complete the repair of the optical scanning device 10, and after the repair is completed, it is not necessary to repair all components in the device. Optical components are integrally calibrated, improving repair efficiency.

FIG. 3 is a schematic diagram of a side structure of a light source device 110 in an embodiment of the present application. As shown in FIG. 3 , the light source device 110 includes a first housing 114 (equivalent to a first mounting part), and the first housing 114 is not limited to a shell-shaped part, but can also be a mounting bracket, a mounting platform or other forms of mounting pieces. The mounting part can be a single part, or an assembly composed of multiple parts. A first emitting portion 115 is disposed on a side surface of the first housing 114 , and the first emitting portion 115 may be an emitting port, such as a square, a circle or other suitable shapes. The bottom of the first housing 114 is provided with two cylindrical first connecting portions 116 protruding downwards for positioning and detachable connection with the mounting seat 190 . The specific manner of the detachable connection will be described in detail later. The first laser 111 is arranged in the first casing 114, and the first laser 111 can also be replaced by for example LED (light-emitting diode, light-emitting diode) or other light generators, and the first laser 111 is only used for the embodiment of the present application An exemplary description should not be regarded as a limitation to the embodiment of the present application. The first laser 111 can emit a first light beam with a wavelength in the wavelength range of invisible light, such as a first light beam with a wavelength of 940nm; or the first laser 111 can emit a first pure color light beam in the visible light wavelength range, such as red and blue 1. The first light beam of one of the three primary colors of green, or the color formed by the combination of two or more of the three primary colors of red, green, and blue. A collimating lens 112 is also arranged in the first housing 114, and the collimating lens 112 is arranged on the optical path of the first light beam, which can make the first light beam pass through the collimating lens 112 and then be collimated and emitted to form a parallel collimated beam. The collimated first light beam is emitted from a predetermined position of the first emitting portion 115 at a predetermined angle, for example, emitted from a central position of the first emitting portion 115 at an angle perpendicular to the first emitting portion 115 .

FIG. 4 is a schematic diagram of a side structure of a light source device 120 in an embodiment of the present application. As shown in FIG. 4 , compared with the light source device 110 , the light source device 120 has the same first housing 114 , and the first housing 114 is provided with the same first connecting portion 116 and first emitting portion 115 . The light source device 120 is different from the light source device 110 in that: three

first lasers

111r, 111g, 111b are arranged side by side in the first casing 114 . The three

first lasers

111r, 111g, and 111b can respectively emit first beams of red, green, blue (RGB) color light wavelengths parallel to each other, on the optical paths of the first beams of red, blue, and

green Collimating lenses

112r, 112g, and 112b are provided respectively, and the

collimating lenses

112r, 112g, and 112b are arranged side by side to collimate and emit the first light beams of corresponding colors. Dichroic mirrors 113r, 113g, 113b are arranged on the optical paths of the red, blue, and green first light beams collimated by the

collimating lenses

112r, 112g, and 112b respectively, and the

dichroic mirrors

113r, 113g, and 113b are arranged side by side. set up. The dichroic mirrors 113r, 113g, and 113b have characteristics of being able to completely reflect light of a certain wavelength (ie, light of a corresponding color) and completely transmit light of other wavelengths (ie, light of a non-corresponding color). Here, total reflection and total transmission are not limited to 100% reflection and transmission, but can be understood as being able to reflect and refract light of, for example, 95% or above other numerical values. According to this characteristic of the

dichroic mirrors

113r, 113g, 113b, the three

dichroic mirrors

113r, 113g, 113b are configured to be capable of reflecting the first beams of corresponding colors and transmitting the first beams of other colors. For example, the dichroic mirror 113b reflects the blue first light beam and transmits the first light beams of other colors. The angles of the three

dichroic mirrors

113r, 113g, and 113b can be set so that the red, blue, and green first light beams are reflected on the

dichroic mirrors

113r, 113g, and 113b and overlap to form a synthetic laser beam. For example: three

dichroic mirrors

113r, 113g, 113b are set to form an angle of 45° with the first light beams of red, blue, and green colors emitted from

collimator lenses

112r, 112g, and 112b respectively, which can make red, blue, and green The angle between the incident direction and the outgoing direction of the first green three-color light beams on the

dichroic mirrors

113r, 113g, and 113b is 90°, so that the first three-color light beams of red, blue, and green colors can be reflected and overlapped to form a laser beam bundle. For example: three

dichroic mirrors

113r, 113g, 113b are respectively arranged at an angle of 45° with the first light beams of red, blue, and green colors, so that the first light beams of red, blue, and green colors can be placed on the

dichroic mirrors

113r, 113b, and 113b respectively. The incident and outgoing angles of 113g and 113b are 90°, so that the red, blue and green first light beams can be reflected and combined into one first light beam. The combined first light beams are emitted from the first emitting portion 115 , and the emitted position and angle are the same as the emitted position and angle of the first light beam in the light source device 110 . By controlling the three

first lasers

111r, 111g, and 111b, the three

first lasers

111r, 111g, and 111b can emit red, blue, and green first light beams with different brightnesses. The first beams of color and green are synthesized into one beam to form the first beams of any color.

Further, the three

dichroic mirrors

113r, 113g, and 113b can also be integrated three-in-one prisms, that is, the three

dichroic mirrors

113r, 113g, and 113b are arranged on one three-in-one prism, thereby ensuring three-in-one prism The positions of the two

dichroic mirrors

113r, 113g, and 113b are fixed, so as to reduce the process of optically calibrating the positions of the

dichroic mirrors

113r, 113g, and 113b.

FIG. 5 is a schematic diagram of a side structure of a light source device 130 in an embodiment of the present application. As shown in FIG. 5 , compared with the light source device 120 , the light source device 130 has the same first housing 114 , and the first housing 114 is provided with the same first connecting portion 116 and first emitting portion 115 . The difference between the light source device 130 and the light source device 120 is that six

first lasers

111r, 111r', 111g, 111g', 111b, 111b' are arranged in the first casing 114, among which five

first lasers

111r, 111r `, 111g, 111g`, and 111b are arranged side by side, and can respectively emit first beams of red, red, blue, blue, and green light wavelengths vertically upwards, and the sixth first laser 111b` is set alone, and can emit green light waves horizontally wavelength of the first beam.

Collimating lenses

112r, 112r', 112g, 112g', 112b, 112b' are arranged on the optical paths of the red, blue and green first beams respectively, so as to collimate and emit the first beams of corresponding colors. Among them, the five

collimating lenses

112r, 112r`, 112g, 112g`, 112b are arranged side by side with the five

first lasers

111r, 111r`, 111g, 111g`, 111b arranged side by side, and the

collimating lenses

112r, 112r`, Dichroic mirrors 113r, 113r`, 113g, 113g`, 113b are respectively arranged on the optical paths of the red, blue and green first light beams emitted after being collimated by 112g, 112g`, 112b,

dichroic mirrors

113r, 113r `, 113g, 113g`, and 113b are arranged side by side at positions opposite to the first emitting portion 115, capable of reflecting the first light beams of corresponding colors and transmitting the first light beams of other colors. The dichroic mirrors 113r , 113r ′, 113g , 113g ′, 113b are arranged at 45°, and can reflect the vertical first light beam to form the first light beam that is emitted horizontally toward the first emitting portion 115 . The sixth first laser 111b' and its corresponding collimating lens 112b' are arranged on the side opposite to the first emitting part 115 of the

dichroic mirrors

113r, 113r', 113g, 113g', 113b, and the first The green first light beam emitted horizontally by the laser 111b' is collimated by the collimating lens 112b' and then transmitted through the

dichroic mirrors

113r, 113r', 113g, 113g', 113b. The red, blue and green first light beams in the horizontal state reflected and/or transmitted by the

dichroic mirrors

113r, 113r`, 113g, 113g`, 113b are combined into one beam, and the combined first beam is produced by the first beam An emitting portion 115 emits, and the emitting position and angle are the same as the emitting position and angle of the first light beam in the light source device 110 .

Therefore, compared with the light source device 120, the first lasers 111r', 111g', 111b' capable of emitting red, blue and green first beams are added in the light source device 130, so that the light emitted by the light source device 130 can be improved. The brightness specification of the first beam. At the same time, because the number of RGB three-color first lasers 111r`, 111g`, and 111b` increases the same, the first beams of red, blue, and green colors are equally strengthened, which is beneficial to the synthesis of the first beams of red, blue, and green colors Adjust the white balance (an indicator of the accuracy of white after the three primary colors of red, green and blue are mixed) after one beam. Correspondingly, collimating lenses 112r`, 112g`, 112b` and dichroic mirrors 113r`, 113g` are added. Since the first laser 111b` can directly emit a horizontal first beam without reflection, there is no need to set it up with the first laser beam. A laser 111b' corresponds to a dichroic mirror. Such an arrangement can reduce the number of dichroic mirrors and help reduce costs.

Further, different numbers of first lasers 111r`, 111g`, 111b` of red, blue, and green first light beams can be added according to requirements, and the number of

first lasers

111r, 111g, 111b of different colors can be the same, so as to realize White balance; can also be different to meet the corresponding needs. The color of the first light beam can be a kind of in red, blue, green color, for example red, red, red or blue, blue, blue; The color of the first light beam can be other combination, for example red, red, blue or blue, Blue, green, or red, blue, green, etc.

In order to enable the

light source devices

110, 120, 130 to emit the first light beam at a predetermined position along the first optical axis at a predetermined angle from the first emitting part 115, when the

light source devices

110, 120, 130 are assembled, the

light source device

110 , 120, 130 in the

first laser

111r, 111g, 111g`, 111b, 111r`,

collimator lens

112r, 112g, 112g`, 112b, 112r`, and

dichroic mirror

113r, 113g, 113g`, 113b The final mounting fixation can only be done after optical alignment.

FIG. 6 is a schematic view of the structure of a light source device 120 in the top direction for optical calibration in the embodiment of the present application. The calibration of the light source device 120 is taken as an example for illustration. The light source device 120 can also be replaced by

light source devices

110 and 130 . As shown in FIG. 6 , the equipment for performing optical calibration on the light source device 120 includes: a first standard platform 200, on which a first fixture 210 for fixing the light source device 120 is arranged, on the first standard platform 200 and A beam profiler 300 is arranged opposite to the first emitting part 115. When the first beam irradiates the beam profiler 300, the beam profiler 300 can detect the position, size and energy of the light spot irradiated by the first beam.

FIG. 7 is a flowchart of a method for assembling a light source device 120 in the embodiment of the present application. As shown in FIG. 7, the specific steps of the method for assembling the light source device 120 in this application are:

Step S101 , pre-assemble the

first lasers

111r, 111g, 111b,

collimator lenses

112r, 112g, 112b and

dichroic mirrors

113r, 113g, 113b on the first housing 114, but do not fix them.

Step S102 , fixing the first shell 114 on the first fixture 210 .

Step S103, turning on the first laser 111r independently, so that the first laser 111r emits a first red light beam. The first laser 111r and the dichroic mirror 113r are adjusted six-axis (the positive and negative six axes of the x, y, and z axes in the space Cartesian coordinate system), so that the first beam is irradiated on the predetermined position on the beam profiler 300, Thus, the first light beam can exit the first housing 114 along the first optical axis.

Step S104 , adjusting the corresponding collimator lens 112r so that the energy of the light spot irradiated by the first light beam on the beam profiler 300 is greater than the first energy threshold and the size of the light spot is smaller than the first size threshold.

Step S105 , fixing the adjusted first laser 111r , collimating lens 112r and dichroic mirror 113r on the first casing 114 .

Step S106, adjust the

first lasers

111g, 111b and

dichroic mirrors

113g, 113b in the same manner as in step S103; adjust the

collimator lenses

112g, 112b in the same manner as in step S104; fix them in the same manner as in step S105

First lasers

111g, 111b,

collimating lenses

112g, 112b, and

dichroic mirrors

113g, 113b.

From the above, by optically calibrating the first light beams of the three colors of RGB respectively, the first light beams of the three colors of RGB can be emitted at the same position and at the same angle by the first emitting part 115 along the first optical axis, and at the same time make the RGB three colors The energy and size of the first light beams of the three colors meet predetermined requirements. Thereby, the first light beams of the three colors of RGB emitted at the same time can be combined into one beam, so that the combined first light beam can be emitted from the first emitting part 115 at the same position and at the same angle along the first optical axis, so that the combined first light beam can be emitted at the same position at the same angle. The energy and size of the first beam after the beam meet the predetermined requirements.

Further, the same method can be used to assemble the

light source device

110 or 130 . Thus, the different

light source devices

110 , 120 , 130 in the embodiment of the present application can emit the first light beams at the same position and at the same angle from the first emitting portion 115 along the first optical axis. Therefore, when the

light source device

110 , 120 , 130 breaks down or needs to be upgraded, the

light source device

110 , 120 , 130 can be directly replaced without optical calibration again.

FIG. 8 is a schematic view of the top structure of a projection device 150 in the embodiment of the present application. As shown in FIG. 8 , the projection device 150 includes: a substantially rectangular second casing 151 (equivalent to a second mounting part), a first incident portion 152 is arranged on a side surface of the second casing 151, and the first The incident portion 152 is, for example, an incident port, which may have the same shape and size as the first incident portion 115 , and a second outgoing portion 153 is disposed on a side surface adjacent to the first incident portion 152 . The angle arranged between the first incident portion 152 and the second emitting portion 153 may be the 90° angle shown in FIG. 7 , or other angles that are convenient for the first light beam to enter and exit. Two cylindrical second connecting portions 154 protruding downward are provided on the lower outer surface of the second housing 151 for positioning and detachable connection with the mounting seat 190 . The specific manner of the detachable connection will be described in detail later. A plate-shaped vibrating mirror 155 is arranged in the second housing 151, and the vibrating mirror 155 is arranged on a 2D MEMS (two-dimensional scanning micro-electromechanical system) and is controlled by the 2D MEMS, so that the vibrating mirror 155 can rotate in two mutually perpendicular axes. swing up. When the first light beam enters the second housing 151 at a predetermined angle from the predetermined position of the first incident part 152, the first light beam is reflected by the oscillating mirror 155 at the initial position (not swinging position) and then passes through the second emitting part 153 The predetermined position shoots out of the second housing 151 at a predetermined angle. For example, from the central position of the first incident portion 152 , it enters at an angle perpendicular to the first incident portion 152 ; from the center of the second emitting portion 153 , it emits at an angle perpendicular to the second emitting portion 153 . The oscillating speed and direction of the 2D MEMS driven vibrating mirror 155 on the two axes are different. For the convenience of description, the axis with a fast swing speed is called the fast axis, and the axis with a slow swing speed is called the slow axis. The fast axis swing makes the reflected first beam perform "row scanning" along the slow axis, and the slow axis swing makes the reflected first beam perform "column scanning" along the fast axis, that is, completes a row of "row scanning" After that, the first light beam can enter the next row, so that the first light beam can continue to perform "row scanning" in the next row. Thus, the vibrating mirror 155 oscillates on the fast axis and the slow axis at the same time, so that the first light beam can perform "row scanning" and "column scanning" at the same time.

Further, the above "row" and "column" should not be regarded as limiting the scanning directions of the fast axis and the slow axis. "Row" and "column" can be "row" direction horizontally and "column" direction vertically; they can also be "column" direction horizontally and "row" direction vertically; or other "row" that can go back and forth " and "column" scan in both directions.

Further, one or more prisms and/or reflectors may also be arranged inside the second housing 151 for changing the optical path of the first light beam after entering the second housing 151 from the first incident part 152 through refraction and reflection. Direction, so that the first light beam can be irradiated on the predetermined position of the vibrating mirror 155 after entering the second housing 151 at a predetermined angle from the predetermined position of the first incident part 152 . Thus, there can be various arrangements between the first incident part 152 and the vibrating mirror 155. For example, when the first light beam enters the second housing 151 at a predetermined position from the first incident part 152 at a predetermined angle, it can be formed by The fast axis is incident (that is, the incident direction of the first light beam is parallel to the plane passing through the fast axis and perpendicular to the vibrating mirror 155), or it can be incident by the slow axis (that is, the incident direction of the first light beam is parallel to passing through the slow axis and parallel to the vibrating mirror 155 vertical faces).

FIG. 9 is a schematic view of the top structure of a projection device 160 in the embodiment of the present application. As shown in FIG. 9 , compared with the projection device 150 , the projection device 160 has the same second housing 151 , and the same first incident portion 152 and the same second output portion 153 are disposed at the same position of the second housing 151 . Compared with the projection device 150, the projection device 160 is different in that two vibrating mirrors 155 are arranged in the second casing 151, and there is a certain angle between the two vibrating mirrors 155, which are respectively composed of two 1D MEMS (one-dimensional scanning). microelectromechanical system) for control. One of the two 1D MEMS can control its corresponding vibrating mirror 155 to swing at a faster speed on the fast axis, and the other 1D MEMS can control its corresponding vibrating mirror 155 to swing at a slower speed on the slow axis. The scanning directions between the fast axis and the slow axis are perpendicular to each other.

When the first light beam enters the second casing 151 at a predetermined angle from the predetermined position of the first incident part 152, it is irradiated on a vibrating mirror 155 at the initial position and reflected, and the reflected first light beam is irradiated to the Another vibrating mirror 155 at the initial position is reflected again, and is projected out of the second housing 151 at a predetermined position by the second emitting portion 153 at a predetermined angle. The fast axis swing makes the reflected first beam perform "row scanning" along the slow axis, and the slow axis swing makes the reflected first beam perform "column scanning" along the fast axis, that is, completes a row of "row scanning" After that, the first light beam can enter the next row, so that the first light beam can continue to perform "row scanning" in the next row. Thus, the two oscillating mirrors 155 oscillate on the fast axis and the slow axis respectively, so that the first light beam can perform "row scanning" and "column scanning" at the same time.

In order to make the first light beam incident into the second housing 151 at a predetermined angle from the predetermined position of the first incident part 152 along the first optical axis, after being reflected by the vibrating mirror 155 at the initial position, it can be transmitted along the second optical axis by The second emitting part 153 emits out from the second housing 151 at a predetermined position at a predetermined angle, and the final installation and fixing can only be completed after the optical alignment of the MEMS and the vibrating mirror 155 is performed.

FIG. 10 is a schematic view of the top structure of the optical calibration of the projection device 150 in the embodiment of the present application. The optical calibration of the projection device 150 is taken as an example for illustration, wherein the projection device 150 can also be replaced by the projection device 160 . As shown in FIG. 10 , the equipment for optically calibrating the MEMS of the

projection devices

150, 160 and the vibrating mirror 155 includes: a second standard platform 400, on which the second standard platform 400 is provided with for fixing the

projection devices

150, 160. Fixture 410 . A second laser 411 (equivalent to a second light generator) is also arranged on the second standard platform 400. After the

projection devices

150, 160 are fixed on the second fixture, the second light beam emitted by the second laser 411 can travel along the first The optical axis enters the second housing 151 . A screen 500 is arranged on the second standard platform 400 relative to the second exit portion 153, and a beam profiler 300 is arranged at the center of the screen 500, and an industrial camera 600 toward the center of the screen 500 is also provided, through which the beam profiler 300 and the industrial camera 600 It is possible to detect the light spot irradiated on the screen. The structure of the second laser 411 may be the same as that of the first laser.

FIG. 11 is a flowchart of a method for assembling the

projection devices

150 and 160 in the embodiment of the present application. As shown in Figure 11, the specific steps of the method for assembling the

projection devices

150, 160 in this application are:

Step S201 , pre-assembling the MEMS and the vibrating mirror 155 on the second housing 151 without fixing them.

Step S202 , fixing the second housing 151 on the second fixture 410 .

Step S203, turn on the second laser 411, the second laser 411 emits a second light beam and enters the second housing 151 along the first optical axis, and the second light beam is reflected by the vibrating mirror 155 and exits from the second emitting part along the second optical axis 153 is emitted and irradiated on the beam profiler 300 on the screen 500 to form a light spot on the beam profiler 300 . Six-axis adjustment is performed on the MEMS and the vibrating mirror 155 , and the beam profiler 300 and the industrial camera 600 confirm that the light spot is located at the center of the screen 500 and then stop.

Step S204 , using a glue dispenser to apply glue on the MEMS, so that the MEMS and the second housing 151 are relatively fixed. The glue can be UV glue (photosensitive glue), UV thermosetting glue or other glue that can be used for pasting and fixing.

From the above, by six-axis adjustment of the MEMS and the vibrating mirror 155, the second light beam reflected by the vibrating mirror 155 is irradiated to the center of the screen 500, and the position of the light spot is confirmed by the beam profiler 300 and the industrial camera 600, thereby It is possible to confirm whether the positions of the MEMS and the vibrating mirror 155 are correct, and to ensure that the accuracy of the MEMS and the vibrating mirror 155 meets the requirements, so as to realize the optical calibration of the

projection devices

150 and 160 .

Furthermore, the screen 500 can also be arranged at the corresponding position of the diffusion sheet in the HUD, thereby ensuring that the optically calibrated

projection devices

150 and 160 can work normally in the following PGU, so that the first light beam emitted by the PGU can be Diffusion on-chip scanning imaging.

FIG. 12 is a schematic view of the top structure of the lens device 170 in the embodiment of the present application. As shown in FIG. 12 , the lens device 170 includes: a substantially rectangular third housing 171 , and the bottom of the third housing 171 is provided with two cylindrical third connecting parts 172 for achieving connection with the mounting base 190 . positioning and detachable connection. The specific manner of the detachable connection will be described in detail later. A through-hole lens hole 173 is horizontally disposed in the middle of the third casing 171 , and a first lens 174 is disposed in the lens hole 173 . The first lens 174 can be a flat-field focusing lens (f-theta). When the first light beam is irradiated on the first lens 174 and transmitted, the first lens 174 can focus the first light beam, thereby reducing the first light beam. The size of the projected light spot is used to adjust the focal length of the first light beam when scanning and imaging.

Further, the lens devices 170 may also be the first lenses 174 with different focal length specifications, that is, each lens device 170 has different focal length specifications. Thus, lens devices 170 with different focal length specifications can be used according to circumstances.

FIG. 13 is a schematic view of the top structure of the receiving device 180 in the embodiment of the present application. As shown in FIG. 13 , the receiving device 180 includes: a substantially rectangular fourth housing 181 , and the bottom of the fourth housing 181 is provided with two cylindrical fourth connecting parts 182 protruding downwards for realization and installation. Positioning and detachable connection between seats 190. The specific manner of the detachable connection will be described in detail later. A second incident portion 183 is arranged on one side of the fourth housing 181, and a second lens 184 is arranged on the second incident portion 183, and the outside light will be deflected toward the center of the second lens 184 after passing through the second lens 184. shift. A photoreceptor 185 is disposed in the fourth housing 181, and the photoreceptor 185 may be a photodetector or other components capable of converting optical signals into electrical signals. The reflected light after the first light beam irradiates an external object passes through the second lens 184 and then changes its propagation direction and then projects onto the photoreceptor 185 , so that the photoreceptor 185 senses the reflected light.

FIG. 14 is a schematic view of the top structure of the mounting seat 190 in the embodiment of the present application. As shown in FIG. 14 , the mounting base 190 is plate-shaped, and the upper surface of the mounting base 190 is provided with a first mounting portion 191 , a second mounting portion 192 , a third mounting portion 193 and a fourth mounting portion 194 . There are two first mounting holes 191 a in the middle of the first mounting portion 191 , and the positions of the two first mounting holes 191 a correspond to the first connecting portion 116 at the bottom of the

light source devices

110 , 120 , 130 . Wherein, a first mounting hole 191 a is a circular through hole, adapted to a first connecting portion 116 , for positioning the

light source devices

110 , 120 , 130 and the mounting base 190 . The other first mounting hole 191 a is an elliptical through hole, so as to facilitate insertion of the other first connecting portion 116 and prevent the

light source devices

110 , 120 , 130 from rotating on the mounting base 190 . When the

light source devices

110 , 120 , and 130 are mounted on the first mounting portion 191 , they can be detachably connected by means of bolt fixing, snap-fitting, etc. after the first connecting portion 116 is positioned and matched with the first mounting hole 191 a. Similarly, a second mounting hole 192a and a fourth mounting hole 194a are respectively provided in the middle of the second mounting portion 192 and the fourth mounting portion 194, and the second mounting hole 192a and the fourth mounting hole 194a are respectively connected to the

projection devices

150, 160 and The second connecting portion 154 and the fourth connecting portion 182 at the bottom of the receiving device 180 correspond to each other, so that the

projection devices

150, 160 and the receiving device 180 can cooperate with the second connecting hole through the second connecting portion 154 and the fourth connecting portion 182 Cooperating with the fourth mounting hole 194a realizes detachable connection. The middle position of the third mounting part 193 is provided with two third mounting holes 193a in the shape of oval through holes. The lens device 170 is mounted behind the third mounting part 193, and the two third connecting parts 172 are respectively located in the two third mounting holes 193a. The lens device 170 can slide along the third mounting hole 193a through the cooperation between the third connecting portion 172 and the third mounting hole 193a, the sliding direction is parallel to the axial direction of the lens hole 173, and can be fixed by bolts after the position is determined. way to achieve detachable connection.

Furthermore, when the light source device 110, the projection device 150, the lens device 170, the receiving device 180 and the mounting base 190 are fixedly installed, the light source device 110 is adjacent to the projection device 150, and the center of the first emitting part 115 and the first incident part 152 Correspondingly, after the first light beam exits the first housing 114 at a predetermined position at a predetermined angle from the first emitting portion 115 , it can enter the second housing 151 at a predetermined position at a predetermined angle from the first incident portion 152 . The lens device 170 is adjacent to the

projection devices

150 and 160, and is located at a position corresponding to the second emitting part 153, so that the first light beam emitted by the second emitting part 153 is projected on the diffusing sheet 175 for scanning and imaging, and is transmitted through the second emitting part 153. A mirror 174 is projected to be able to project outward. The lens device can also slide along the third mounting hole 193 a on the mounting base 190 , so as to fine-tune the focal length of projection and make the pattern produced by projection clearer. The receiving device 180 is adjacent to the lens device 170, and the second incident part 183 of the receiving device 180 faces the direction in which the first light beam is emitted from the second emitting part 153. Therefore, it is only necessary to optically align the

light source devices

110, 120, 130 and the

projection devices

150, 160 so that the first light beam is emitted from a predetermined position of the first emitting part 115 at a certain angle, and the first light beam can be emitted by the first incident part 152. The predetermined position is projected into the second housing 151 at a predetermined angle. When the light source device 110 and the projection device 150 need to be installed or replaced, the light source device 110 and the projection device 150 can be directly installed at a predetermined position without optical calibration again. Meanwhile, the light source device 110 may be replaced by the light source device 120 or the light source device 130 , and the projection device 150 may be replaced by the projection device 160 .

FIG. 15 is a schematic structural diagram of a light source device 140 in an embodiment of the present application. As shown in FIG. 15, the light source device 140 includes a first mount 141, and

first lasers

111r, 111g,

111b collimating lenses

112r, 112g, 112b and

dichroic mirrors

113r, 113g arranged on the

first mount

141 , 113b, the setting form of which is the same as that of the light source device 120. The first mounting part 141 is also provided with a second mounting part 141a for detachable connection with the

projection device

150, 160, a third mounting part 141b for detachable connection with the lens device 170, and a fourth mounting part 141b for detachable connection with the receiving device 180. Mounting portion 141c. The arrangement form of the second installation part 141a, the third installation part 141b and the fourth installation part 141c can be the same as the arrangement form of the second installation part 192, the third installation part 193 and the fourth installation part 194 on the mounting seat 190, so that the light source The device 140 integrates the light source device 120 and the mounting base 190 to form a main body, and the

projection devices

150 , 160 , the lens device 170 and the receiving device 180 are directly and detachably connected to the light source device 140 .

Furthermore, the

projection devices

150, 160 and the mounting base 190 can also be integrated to form a new projection device, so that the

light source devices

110, 120, 130, the lens device 170 and the receiving device 180 can be directly detachable from the integrated new projection device. connect.

The light scanning device using the above-mentioned light source device and projection device will be described below with reference to examples.

1. Graphic headlights

FIG. 16 is a schematic structural diagram of an optical scanning device 10 in an embodiment of the present application. As shown in Figure 16, the optical scanning device 10 includes: a mount 190, and

light source devices

110, 120, 130 and

projection devices

150, 160 installed at corresponding positions on the mount 190, so that the first emitting part 115 and the first incident Section 152 corresponds. Thus, the light scanning device 10 can form an image-type vehicle light, and any one of the light source device 110 , the light source device 120 or the light source device 130 can be selected in the light scanning device 10 . Among them, selecting the light source device 110 and the light source device 120 can help save costs. The projection device 150 or the projection device 160 can be selected in the optical scanning device 10 .

After the first light beams emitted by the

light source devices

110, 120, 130 exit the first casing 114 at a predetermined position at a predetermined angle from the first emitting part 115, they can enter the second casing at a predetermined position at a predetermined angle from the first incident part 152. 151 , the first light beam is irradiated to the oscillating mirror 155 and then reflected and emitted from the second emitting portion 153 . The vibrating mirror 155 is driven by the MEMS to oscillate on the fast axis and the slow axis, so that the first light beam emitted by the second emitting portion 153 can linearly scan back and forth on the screen to form a pattern. The screen can be a specially set curtain, or it can be a wall or a ground.

Thus, when the light source device 110 is used as the light source of the first light beam, since the first laser 111 in the light source device 110 can emit pure-color laser light, after the first light beam is reflected by the vibrating mirror 155 for scanning imaging, a single light beam can be formed. pattern of colors.

FIG. 17 is a usage scenario diagram of the optical scanning device 10 in the embodiment of the present application. As shown in FIG. 17 , the light scanning device 10 can be installed on the vehicle 1 such as the position of the headlights, the middle position of the rear of the vehicle or the top of the vehicle 1 . After the light scanning device 10 is set on the vehicle 1, it can scan the ground to form a pattern with warning information. For example, as shown in FIG. 16 , when the vehicle 1 stops to give way to pedestrians, the light scanning device 10 installed at the headlight position can scan the road in front of the vehicle 1 to form patterns and characters to remind pedestrians to pass. The optical scanning device 10 arranged at the rear of the vehicle 1 can scan the road surface at a certain distance behind the vehicle 1 to form text and warning patterns, reminding the vehicles behind to keep the distance between them.

When the

light source devices

120 and 130 are used as the light source of the first light beam, since the

light source devices

120 and 130 can emit the first light beam of any color, color patterns can be formed by scanning, thereby improving user experience. In addition, the

light source devices

120, 130 can also emit white first light beams, thus, the light scanning device 10 can be arranged at the headlight position of the vehicle 1 to provide illumination, and the illumination range can be adjusted by changing the image formed by scanning . Thus, the range of illumination can be controlled as required.

Fig. 18a is a diagram of another usage scenario of the optical scanning device 10 in the embodiment of the present application; Fig. 18b is a diagram of another usage scenario of the optical scanning device 10 in the embodiment of the present application. As shown in Figure 18a and Figure 18b, the light scanning device 10 can control the range of lighting according to needs, for example, when the vehicle 1 is turning at night as shown in Figure 18a, the lighting range in the turning direction is increased to improve the driver's awareness of turning. understanding of the location and road conditions; or when passing cars at night as shown in Figure 18b, do not illuminate the position of the oncoming vehicle 1, so as to avoid illuminating the eyes of the driver of the oncoming vehicle 1 and affecting the driving of the oncoming vehicle 1.

2. Radar

FIG. 19 is a schematic structural diagram of an optical scanning device 20 in an embodiment of the present application. As shown in FIG. 19 , the optical scanning device 20 includes: a mounting base 190, and a light source device 110, a projection device 150, and a receiving device 180 installed at corresponding positions on the mounting base 190, so that the first emitting part 115 and the first incident part 152 Corresponding. Wherein, the projection device 150 may also be replaced by a projection device 160 . Thus, the light scanning device 20 can form a radar.

The light source device 110 may provide, for example, a first light beam with a wavelength of 940 nm or 1050 nm, or other first light beams in the wavelength range of invisible light. After the first light beam exits the first housing 114 at a predetermined position at a predetermined angle from the first emitting portion 115, it can enter the second housing 151 at a predetermined position at a predetermined angle from the first incident portion 152, and the first light beam irradiates the vibrating mirror 155. After reflection, it is emitted from the second emitting portion 153 . The vibrating mirror 155 is driven by the MEMS to oscillate on the fast axis and the slow axis, so that the first light beam emitted from the second emitting portion 153 can be linearly scanned back and forth to scan the external environment. The first light beam will be reflected when it irradiates an external object, and the reflected light will pass through the second mirror 184 in the second incident part 183 and then be projected onto the photoreceptor 185, which can be sensed by the photoreceptor 185, and then the external object can be obtained. point cloud information. Since the propagation speed of light is known, the distance to the external object can be calculated according to the time difference between the time when the first light beam is emitted and the time sensed by the photoreceptor 185 .

FIG. 20 is a usage scenario diagram of the optical scanning device 20 in the embodiment of the present application. As shown in Figure 20, after the optical scanning device 20 is installed on the vehicle 1, the point cloud information of the target object can be obtained by scanning the light beam, and the feature points of the target object can be extracted to obtain the precise position of the feature points, so that the target object can be detected The shape and position of the vehicle can be used, for example, to assist automatic driving.

3. PGUs

FIG. 21 is a schematic structural diagram of a possible embodiment of the optical scanning device 30 in the present application. As shown in Figure 20, the optical scanning device 30 includes: a mounting base 190, and a light source device 110, a projection device 150, and a lens device 170 installed at corresponding positions on the mounting base 190. After installation, the first emitting part 115 and the first incident part 152 corresponds, and the second emitting portion 153 corresponds to the first lens 174 . Wherein, the light source device 110 can also be replaced by the light source device 120 and the light source device 130 described below; the projection device 150 can also be replaced by the projection device 160 described below.

After the first light beams emitted by the

light source devices

110, 120, 130 exit the first casing 114 at a predetermined position at a predetermined angle from the first emitting part 115, they can enter the second casing at a predetermined position at a predetermined angle from the first incident part 152. 151 , the first light beam is irradiated on the oscillating mirror 155 and then reflected, emitted from the second emitting portion 153 , and irradiated onto the first lens 174 of the lens device 170 . The first light beam is transmitted through the first lens 174 , and the first lens 174 focuses the first light beam and can reduce the size of the light spot projected by the first light beam. The vibrating mirror 155 is driven by the MEMS to oscillate on the fast axis and the slow axis, so that the first light beam emitted by the second emitting portion 153 can be linearly scanned back and forth. When the optical scanning device 30 is installed in the HUD, the first light beam can be scanned on the diffusion sheet in the HUD to form an image, the image is projected through the diffusion sheet, and the projected pattern is refracted or After reflection, it is projected to the front windshield of the car, and enters the eyes of the driver after being reflected by the front windshield, so that the driver in the vehicle 1 can see a clear virtual image when looking outside the car through the windshield.

FIG. 22 is a usage scenario diagram of the optical scanning device 30 in the embodiment of the present application. As shown in FIG. 22 , when the driver looks out of the vehicle through the front windshield, he can see a virtual image with a certain depth of field (that is, the distance of the clear image presented in the range before and after the focus of the image). The content of the virtual image may include road indication information, speed information of the vehicle 1 , navigation information, audio-visual entertainment system information, etc., so that the driver can understand the information needed to drive the vehicle 1 without shifting his sight when driving the vehicle 1 . Avoid driving risks caused by the driver not being able to take into account the road conditions, such as looking down at the instrument panel or the information on the central control screen when the driver is driving the vehicle 1 .

Wherein, when the light source device 110 is used as the light source, since the light source device 110 can only emit a pure-color first light beam, the image generated by scanning is a monochrome image. When the

light source devices

120 and 130 are used as light sources, since the

light source devices

120 and 130 can generate the first light beams of any color, color images can be generated by scanning. At the same time, since the number of first lasers 111 in the light source device 120 and the light source device 130 is different, the brightness of the first light beam generated by the light source device 120 and the light source device 130 is different, so that the image brightness generated by scanning is different. According to the above characteristics among the light source device 110 , the light source device 120 and the light source device 130 , the

light source devices

110 , 120 , 130 with appropriate brightness specifications can be selected as required.

In addition, for the

projection devices

150 and 160, since the projection device 150 can control the vibrating mirror to swing on the fast axis and the slow axis through a MEMS, the MEMS and the vibrating mirror 155 in the projecting device 150 are more accurate when performing optical calibration. Simple and time-saving. At the same time, the projection device 150 only needs one reflection on the vibrating mirror 155 to realize "row scanning" and "column scanning", which reduces the loss of light during reflection, so the projection device 150 has better light efficiency. The MEMS in the projection device 160 only needs to control the vibrating mirror 155 to swing on the fast axis or the slow axis, therefore. The structure and design of the MEMS in the projection device 160 are simpler, easy to manufacture, and low in cost. According to the above features of the projection device 150 and the projection device 160 ,

suitable projection devices

150 and 160 can be selected as required.

Further, the control of the imaging focal length can be achieved by replacing the lens device 170 with different focal length specifications, and the lens device 170 can be installed along the third mounting hole 193a through the cooperation between the third connecting part 172 and the third mounting hole 193a during replacement. The aperture 193a slides so that the focus is adjusted so that the driver can see the pattern clearly.

FIG. 23 is a schematic diagram of the reflectivity of S-polarized light and P-polarized light at different incident angles. When the wave direction of light is horizontal to the direction of propagation, it is S-polarized light, and when the wave direction of light is perpendicular to the direction of propagation, it is P-polarized light. As shown in Figure 23, when S-polarized light and P-polarized light enter a medium with a refractive index n ₁ (ratio of the propagation speed of light in vacuum to the propagation speed of light in the medium) of 1, the refractive index n ₂ is In the medium of 2 as an example, the reflectivity of S polarized light will increase with the increase of incident angle, and the reflectivity of P polarized light will decrease with the increase of incident angle. When the incident angle of P polarized light is in Bruce Special angle (Brewster angle, also known as polarization angle, when the incident light enters the interface at this angle, the reflected light and the refracted light are perpendicular to each other), the reflectivity of P polarized light is 0, when the incident angle of P polarized light As it continues to increase, the reflectivity will gradually increase. Based on this, since the image projected by the light scanning device 30 needs to be projected into the eyes of the driver after being reflected by the front windshield, the incident angle of the image projected by the light scanning device 30 on the front windshield needs to be greater than Brewster's angle to improve the reflectivity, so that more light is projected into the driver's eyes, thus improving the imaging effect.

Simultaneously, the RGB three-color first light beams in the light source device can all be configured as S polarized light, thereby forming a full S polarized mode, thereby improving the reflectivity of the image projected by the light scanning device 30 on the front windshield, so that More light is projected into the driver's eyes, improving imaging.

Further, when the driver is driving the vehicle 1, he often wears polarized sunglasses to avoid the impact of strong light on the eyes. Most polarized sunglasses will filter out S-polarized light, so if the driver uses the HUD while wearing polarized sunglasses, the brightness of the image seen by the driver will be greatly reduced. Therefore, the light source device 130 can also be configured such that the

first lasers

111r, 111g, 111b emit S-polarized light, and the first lasers 111r', 111g', 111b' emit P-polarized light. In this way, the first light beam can simultaneously contain S-polarized light and P-polarized light. Therefore, the image brightness of the HUD seen by the driver when wearing polarized sunglasses can be improved, and the imaging effect can be improved.

Furthermore, the

light source devices

110, 120, 130,

projection devices

150, 160, lens device 170, and receiving device 180 in the optical scanning device of the present application can not only be fixed on the mounting base 190 to achieve relative fixation, so that the second After a light beam exits the first housing 114 at a predetermined position at a predetermined angle from the first emitting portion 115 , it can enter the second housing 151 at a predetermined position at a predetermined angle from the first incident portion 152 . The relative fixed connection can also be realized through fixing methods such as positioning bonding structure, engaging structure or bolts arranged among the

light source devices

110 , 120 , 130 ,

projection devices

150 , 160 , lens device 170 , and receiving device 180 .

FIG. 24 is a flow chart of the assembly method of the

optical scanning devices

10, 20, 30 in the embodiment of the present application. As shown in FIG. 24, the specific process of the assembly method of the

optical scanning device

10, 20, 30 includes:

Step S301 , acquiring the

light source devices

110 , 120 , 130 , the

projection devices

150 , 160 and the mounting base 190 , or obtaining the light source device 140 and the

projection devices

150 , 160 .

Step S302, install the obtained

light source devices

110, 120, 130 and

projection devices

150, 160 on the mounting base 190, so that the

light source devices

110, 120, 130 and the

projection devices

150, 160 are detachably connected, or the

projection device

150 , 160 are installed on the first mounting part 141 of the light source device 140, so that the light source device 140 is detachably connected with the

projection devices

150, 160.

Thus, the optical scanning device 10 can be assembled into an image-type vehicle lamp.

Step S303 , acquiring the lens device 170 .

Step S304 , detachably connect the lens device 170 to the mount 190 , or detachably connect the lens device 170 to the first mount 141 of the light source device 140 .

Thus, the optical scanning device 30 can be assembled into a PGU.

Step S305 , acquiring the receiving device 180 .

Step S306 , detachably connect the receiving device 180 to the mounting base 190 , or detachably connect the receiving device 180 to the first mounting part 141 of the light source device 140 .

Thus, the light scanning device 20 can be assembled into a radar.

Note that the above are only preferred embodiments and technical principles used in this application. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present application has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, all of which belong to protection scope of the present invention.

Claims

A light source device, characterized in that it comprises:

a first mounting part, used for detachably connecting the light source device with other devices;

a first light generator, the first light generator is arranged on the first mounting part, and is used to generate a first light beam;

A collimating lens, the collimating lens is arranged on the first installation part, and is used to collimate the first light beam and emit it.
The light source device according to claim 1, characterized in that it comprises:

a plurality of said first light generators;

A plurality of collimating lenses, the plurality of collimating lenses are respectively arranged corresponding to the plurality of first light generators.
The light source device according to claim 2, characterized in that,

The color of the first light beam is one or a combination of red, blue and green colors.
The light source device according to any one of claims 1-3, characterized in that the light source device further comprises: a plurality of dichroic mirrors, the dichroic mirrors are used to combine multiple beams of the first light beam Combine into a bunch.
The light source device according to claim 4, wherein:

The plurality of dichroic mirrors are arranged corresponding to the plurality of first light generators, and each of the plurality of dichroic mirrors is used to reflect the first light beam of the corresponding color and transmit the non- Corresponds to the first beam of color.
The light source device according to any one of claims 1-5, wherein the first light beam emitted by the first light generator is S-polarized light.
The light source device according to any one of claims 2-5, wherein the first light beams emitted by some of the first light generators in the plurality of first light generators are S-polarized light, and the plurality of first light generators The first light beam emitted by another part of the first light generator in one light generator is P polarized light.
The light source device according to any one of claims 2-7, characterized in that, among the plurality of first light generators, the number of first light generators emitting red, blue and green first light beams is the same.
A projection device, characterized in that it comprises:

a second mounting part for detachably connecting the projection device with other devices;

A vibrating mirror, the vibrating mirror is arranged on the second mounting part, and is used for reflecting the first light beam, and the vibrating mirror swings to scan the reflected first light beam.
An optical scanning device, characterized in that it includes a light source device and a projection device;

The light source device includes:

a first mounting part, used for detachably connecting the light source device with other devices;

a first light generator, the first light generator is arranged on the first mounting part, and is used to generate a first light beam;

a collimating lens, the collimating lens is arranged on the first mounting part, and is used to collimate and emit the first light beam;

The projection device includes:

a second mounting part, the second mounting part is detachably connected to the light source device;

A vibrating mirror, the vibrating mirror is arranged on the second mounting part, and is used to reflect the first light beam, and the vibrating mirror swings to scan the reflected first light beam.
The optical scanning device according to claim 10, wherein the second mounting part is detachably connected to the first mounting part.
The optical scanning device according to claim 10 or 11, further comprising a lens device detachably connected to the second mount;

The lens device has a first lens for focusing the first light beam.
The optical scanning device according to any one of claims 10-12, further comprising:

A receiving device, the receiving device has a photoreceptor, and the photoreceptor is used for sensing the light reflected back after the first light beam irradiates an object.
A method for assembling a light source device, comprising:

pre-assembling the first light generator and the collimating lens on the first mounting part;

optically aligning the first light generator and the collimating lens;

The first optical generator and the collimating lens after the optical calibration are fixed on the first mounting part.
The assembly method according to claim 14, wherein the optical calibration of the first light generator and the collimator lens specifically comprises:

irradiating the first light beam emitted by the first light generator onto a beam profiler, and the beam profiler is used to detect the energy and size of the first light beam;

Adjusting the first light generator and the collimating lens, so that the energy of the first light beam is greater than or equal to a first energy threshold, and the size of the first light beam is less than or equal to a first size threshold.
A method for assembling a projection device, comprising:

Pre-assemble the vibrating mirror on the second mounting part;

performing optical calibration on the vibrating mirror;

The vibrating mirror after the optical calibration is fixed on the second mounting part.
The assembly method according to claim 16, wherein the optical calibration of the vibrating mirror specifically comprises:

making the second light generator emit a second light beam and projecting the second light beam onto the beam profiler after being reflected by the galvanometer;

adjusting the vibrating mirror so that the reflected second light beam is projected onto a predetermined position on the profiler.
A method for assembling an optical scanning device, characterized in that the optical scanning device includes a light source device and a projection device, and the assembling method includes:

detachably connecting the light source device and the projection device through a first mounting part and a second mounting part to obtain the optical scanning device;

The light source device includes the first mounting part, a first light generator and a collimating lens, the first light generator and the collimating lens are arranged on the first mounting part, and the first light generating The device is used to generate a first light beam, and the collimating lens is used to collimate the first light beam to exit;

The projection device includes the second mounting part and a vibrating mirror, the vibrating mirror is arranged on the second mounting part for reflecting the first light beam from the light source device, and the vibrating mirror swings to make the reflection after the first beam scan.
The assembly method according to claim 18, further comprising:

A lens device is detachably connected to the light source device, and the lens device is used to focus the first light beam.
The assembly method according to claim 18, further comprising:

The receiving device is detachably connected with the light source device, and the receiving device is used for sensing the light reflected back after the first light beam irradiates the object.
A head-up display system, characterized by comprising the optical scanning device according to any one of claims 10-13.
The head-up display system according to claim 21, wherein the head-up display system further comprises:

An optical element onto which the light scanning device projects an image.
A vehicle, characterized by comprising the optical scanning device according to any one of claims 10-13; or, the head-up display system according to claim 21 or 22.