Imaging module, near-to-eye display device and head-mounted display equipment

Abstract

The invention discloses an imaging module, a near-to-eye display device and a head-mounted display device, the head-mounted display device comprises the near-to-eye display device, the near-to-eye display device comprises a scanning MEMS galvanometer, an optical waveguide lens and an imaging module, and the imaging module comprises a linear array image source, a refractive curved surface reflector, a first plane reflector and a second plane reflector. The first plane mirror and the second plane mirror are both located on one side of the refraction curved surface mirror, and the first plane mirror and the second plane mirror are spaced to form an incident groove; light of the linear array image source is reflected at least twice between the refraction curved surface reflector and the first plane reflector, the refraction curved surface reflector reflects the light to the second plane reflector, and the light is emitted from the imaging module after being reflected by the second plane reflector. The imaging module uses multiple reflections of the refractive curved reflector to amplify the equivalent focal length and reduce the volume of the imaging module, and the application can be widely applied to the technical field of near-to-eye display.

Description

Technical Field

[0001] The present application relates to the field of near-eye display technology, and in particular to an imaging module, a near-eye display device, and a head-mounted display device. Background Art

[0002] In existing AR or VR devices, most use a sequential lens module to place the image source near the focal plane to obtain a magnified virtual image; or use a refractive concave mirror to reflect the image into a magnified virtual image in one go.

[0003] AR devices using sequential lens modules have a relatively small diagonal field of view, ranging from 15° to 40°. They can only be used as near-eye devices for information display and cannot meet the needs of office work or viewing movies. AR or VR devices using refractive concave mirrors for single-shot reflection imaging, while their diagonal field of view exceeds 40°, and can even reach a maximum of 50°, are relatively large, with a minimum thickness of 16mm. A single-display AR or VR device with an external battery and motherboard can weigh over 100 grams, and all-in-one devices are even heavier. Summary of the Invention

[0004] In order to solve at least one of the above technical problems, the present application provides an imaging module, a near-eye display device and a head-mounted display device, and the technical solutions adopted are as follows.

[0005] The head-mounted display device provided in this application includes a near-eye display device.

[0006] The near-eye display device provided in the present application includes a scanning MEMS galvanometer, an optical waveguide lens and an imaging module. The side of the imaging module where light is emitted is close to the optical waveguide lens. A transmission surface is provided on the end of the optical waveguide lens close to the imaging module. The transmission surface is set as a light-transmitting inclined surface, and the scanning MEMS galvanometer is close to the transmission surface.

[0007] In certain embodiments of the present application, the optical waveguide lens is configured as an array optical waveguide lens or a diffraction optical waveguide lens.

[0008] The imaging module provided in the present application includes a linear array image source, a refractive surface reflector, a first plane reflector and a second plane reflector, wherein the first plane reflector and the second plane reflector are both located on the side of the mirror surface of the refractive surface reflector, and the first plane reflector and the second plane reflector are arranged at intervals to form an incident groove for the light of the linear array image source; wherein the light of the linear array image source is reflected at least twice between the refractive surface reflector and the first plane reflector, the refractive surface reflector reflects the light to the second plane reflector and the light is emitted from the imaging module after reflection by the second plane reflector, and the second plane reflector is closer to the exit surface of the imaging module than the first plane reflector.

[0009] In some embodiments of the present application, the imaging module is alternatively configured to include a solid light-transmitting structure and the line array image source. A reflective film is coated on the surface of the solid light-transmitting structure to form the refractive curved mirror, the first planar mirror, and the second planar mirror. The first planar mirror is closer to the exit surface of the imaging module than the second planar mirror.

[0010] In some embodiments of the present application, the angle between the mirror surface of the first planar mirror and the chord of the curved surface of the refractive curved mirror is A, satisfying: 2° ≤ A ≤ 8°.

[0011] In some embodiments of the present application, the angle between the mirror surfaces of the first planar mirror and the second planar mirror is C, satisfying: 177° ≤ C ≤ 183°.

[0012] In some embodiments of the present application, the angle between the mirror surfaces of the first planar mirror and the second planar mirror is C, satisfying: 140° ≤ C ≤ 150°.

[0013] In some embodiments of the present application, the incident angle of the light from the line array image source on the refractive curved mirror is B, satisfying: 3° ≤ B ≤ 12°.

[0014] In some embodiments of the present application, the angle between the mirror surface of the second planar mirror and the chord of the curved surface of the refractive curved mirror is E, satisfying: 30° ≤ E ≤ 40°.

[0015] The present application has at least the following beneficial effects: The imaging module in the near-eye display device is configured with a first planar mirror and a second planar mirror for the refractive curved mirror. The light from the line array image source enters the refractive curved mirror from the incident groove. After the light is reflected at least twice between the refractive curved mirror and the first planar mirror, the refractive curved mirror reflects the light to the second planar mirror, and the second planar mirror reflects the light and exits from the imaging module to the waveguide lens. The light exits from the transmission surface of the waveguide lens to the scanning MEMS galvanometer, and the scanning MEMS galvanometer reflects the light and enters the waveguide lens from the transmission surface. The waveguide lens splits the light and exits it to the human eye observation area, forming a good imaging effect. The imaging module utilizes multiple reflections of the refractive curved mirror to not only achieve an enlarged equivalent focal length but also reduce the volume of the imaging module. The present application can be widely applied to the field of near-eye display technology.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application will be further illustrated below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments shown in the following drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation of the present application.

[0018] Figure 1 FIG. is a schematic structural diagram of some embodiments of a near-eye display device and a schematic diagram of the light trajectory. In the figure, the optical waveguide lens is an array optical waveguide lens.

[0019] Figure 2 FIG. is a schematic structural diagram of some embodiments of a near-eye display device and a schematic diagram of the light trajectory. In the figure, the optical waveguide lens is a diffractive optical waveguide lens.

[0020] Figure 3 is Figure 1 and Figure 2 a schematic structural diagram of the imaging module, the optical waveguide lens and the scanning MEMS galvanometer in and a schematic diagram of the light trajectory.

[0021] Figure 4 FIG. is a schematic diagram of the relative positions of the linear image source, the refractive curved mirror and the first plane mirror in the imaging module and a schematic diagram of the angles A and B of incidence.

[0022] Figure 5 FIG. is a schematic diagram of three relative positions of the first plane mirror and the second plane mirror in the imaging module and a schematic diagram of the angle C.

[0023] Figure 6 FIG. is a schematic structural diagram of some other embodiments of a near-eye display device and a schematic diagram of the light trajectory.

[0024] Figure 7 is Figure 6 a schematic structural diagram of the imaging module, the optical waveguide lens and the scanning MEMS galvanometer in and a schematic diagram of the light trajectory.

[0025] Figure 8 is Figure 6 a schematic diagram of the relative positions of the refractive curved mirror, the first plane mirror and the second plane mirror of the solid light-transmitting structure in and a schematic diagram of the angles A, C and E.

[0026] It should be noted that the schematic structural diagrams in FIGS. to only schematically show the relative positional relationship of the structures in the imaging module and the near-eye display device, and do not limit the size of each structure. Figure 1 to Figure 8 of each structure schematic diagram only schematically shows the relative positional relationship of the structures in the imaging module and the near-eye display device, and does not limit the size of each structure.

[0027] Reference numerals: 1000, imaging module; 1100, linear image source; 1200, refractive curved mirror; 1301, first plane mirror; 1302, second plane mirror; 1303, incident groove; 1400, solid light-transmitting structure; 2000, optical waveguide lens; 2100, transmission surface; 3000, scanning MEMS galvanometer; 4000, human eye. Detailed implementation manners

[0028] The following Figures 1 to 8 will describe the embodiments of the present application in detail, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0029] In the description of the present application, it should be understood that if terms such as "center", "middle part", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present application.

[0030] In the description of the present application, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0031] In the description of the present application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "link" should be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0032] In the description of the present application, if there are descriptions of reference terms such as "an embodiment", "some embodiments", "an example", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", "some examples", etc., it means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0033] The present application relates to a head-mounted display device, and the head-mounted display device includes a near-eye display device, and the near-eye display device has a thin and light structure, a large field of view, high picture quality, and less stray light.

[0034] The user wears the head-mounted display device on the head, and imaging is realized in the near-eye display device by an imaging module 1000, a waveguide lens 2000, and a scanning MEMS galvanometer 3000, so as to provide the user with a virtual reality or augmented reality experience.

[0035] It should be noted that the head-mounted display device includes, but is not limited to, terminal products in the form of helmets or glasses.

[0036] The other components and operations of the head-mounted display device are already described in the related art for those of ordinary skill in the art, and will not be described in detail here. The following will introduce the structures of the near-eye display device and the imaging module 1000.

[0037] The present application relates to a near-eye display device, and the near-eye display device includes an imaging module 1000, a waveguide lens 2000, and a scanning MEMS galvanometer 3000. One side of the imaging module 1000 where light exits is close to the waveguide lens 2000. A transmission surface 2100 is provided at one end of the waveguide lens 2000 close to the imaging module 1000, and the scanning MEMS galvanometer 3000 is close to the transmission surface 2100.

[0038] In some examples, the scanning MEMS galvanometer 3000 is set as a single-axis scanning MEMS galvanometer.

[0039] This application relates to an imaging module 1000, which includes a refractive curved mirror 1200, a first planar mirror 1301, and a second planar mirror 1302. Both the first planar mirror 1301 and the second planar mirror 1302 are located on the same side as the mirror surface of the refractive curved mirror 1200. The mirror surfaces of the first planar mirror 1301 and the second planar mirror 1302 both face the mirror surface of the refractive curved mirror 1200. The second planar mirror 1302 is closer to the exit surface of the imaging module 1000 than the first planar mirror 1301.

[0040] Both the first planar mirror 1301 and the second planar mirror 1302 are arranged at intervals from the refractive curved mirror 1200, so that light is reflected and propagated between the refractive curved mirror 1200 and the first planar mirror 1301, and light is reflected and propagated between the refractive curved mirror 1200 and the second planar mirror 1302. It should be noted that the reflection of light in the imaging module is air-borne.

[0041] The imaging module 1000 further includes a linear image source 1100, which is located on the same side as the mirror surface of the refractive curved mirror 1200. The first planar mirror 1301 and the second planar mirror 1302 are arranged at intervals, and the gap between the first planar mirror 1301 and the second planar mirror 1302 forms a light incident slot 1303. The distance from the linear image source 1100 to the refractive curved mirror 1200 is greater than the distance from the incident slot 1303 to the refractive curved mirror 1200. It can be understood that the light of the linear image source 1100 passes through the incident slot 1303 and is incident on the mirror surface of the refractive curved mirror 1200, and then the refractive curved mirror 1200 reflects the light to the mirror surface of the first planar mirror 1301.

[0042] Furthermore, the light of the linear image source 1100 is incident into the imaging module 1000 from the incident slot 1303, and the light is deflected towards the side where the first planar mirror 1301 is located. The light is reflected at least twice between the refractive curved mirror 1200 and the first planar mirror 1301. After that, the refractive curved mirror 1200 reflects the light to the second planar mirror 1302, and the light is reflected by the second planar mirror 1302 and then exits from the imaging module 1000. It should be noted that the second planar mirror 1302 reflects the light once.

[0043] In the imaging module 1000 in the related art, the refractive curved mirror 1200 is only provided with a plane mirror. Light is incident on the refractive curved mirror 1200, and the refractive curved mirror 1200 reflects the light to the plane mirror, and the plane mirror reflects the light and completes the light output. In the imaging module 1000 designed in the present application, the refractive curved mirror 1200 is provided with a first plane mirror 1301 and a second plane mirror 1302, and the effective object distance is increased by multiple reflections of light between the refractive curved mirror 1200 and the first plane mirror 1301, so that the equivalent focal length is enlarged, the volume of the imaging module 1000 is reduced, the diagonal field of view angle is expanded to more than 90°, and the total thickness of the near-eye display device including the imaging module 1000 is reduced. The total thickness of the near-eye display device including the imaging module 1000 can be reduced to no more than 8 mm.

[0044] On the other hand, compared with the method of directly using a matrix image source in the related art, the imaging module 1000 in the present application adopts a linear array image source 1100. If under the condition of the same required field of view angle, the method of obtaining a matrix image by scanning the light of the linear array image source 1100 by the scanning MEMS galvanometer 3000 can further reduce the volume of the imaging module 1000.

[0045] It should be noted that in order to enable the light reflected from the first plane mirror 1301 onto the refractive curved mirror 1200 to finally propagate to the second plane mirror 1302, the position of the first plane mirror 1301 should be reasonably designed.

[0046] Specifically, the included angle between the mirror surface of the first plane mirror 1301 and the chord of the curved surface of the refractive curved mirror 1200 is A, satisfying: 2° ≤ A ≤ 8°, so as to improve the reflection effect of light between the refractive curved mirror 1200 and the first plane mirror 1301, ensure that there are multiple reflections of light between the refractive curved mirror 1200 and the first plane mirror 1301, and the light can be reflected from the refractive curved mirror 1200 to the second plane mirror 1302 in time, realizing a good imaging effect.

[0047] If A is greater than 8°, it will cause too few reflections of light between the refractive curved mirror 1200 and the first plane mirror 1301, too few light layers, short object distance, and it is difficult to achieve a good imaging effect.

[0048] If A is less than 2°, it will cause excessive reflection times of light between the refractive curved mirror 1200 and the first planar mirror 1301, and further lead to too long propagation path and time of light between the refractive curved mirror 1200 and the first planar mirror 1301. It should be noted that if A is 0°, with multiple reflections of light between the refractive curved mirror 1200 and the first planar mirror 1301, the light will propagate away from the second planar mirror 1302, and the light cannot be reflected from the refractive curved mirror 1200 to the second planar mirror 1302.

[0049] In some embodiments, to adapt to the position of the first planar mirror 1301, the position of the second planar mirror 1302 also needs to be designed accordingly so that the second planar mirror 1302 can reflect light and exit from the imaging module 1000. Specifically, the included angle C between the mirror surfaces of the first planar mirror 1301 and the second planar mirror 1302 satisfies: 177° ≤ C ≤ 183°.

[0050] If C is less than 177°, it will cause the light not to be able to exit from the imaging module 1000 after being reflected by the second planar mirror 1302. If C is greater than 183°, it will cause the internal reflection stray light of the transmission surface 2100 of the optical waveguide lens 2000 to contaminate the image quality.

[0051] It can be understood that taking the included angle of 0° when the mirror surfaces of the first planar mirror 1301 and the second planar mirror 1302 are coplanar as a reference, the tilting amplitude range of the second planar mirror 1302 to both sides is ±3°.

[0052] Specifically, one end of the mirror surface of the second planar mirror 1302 far from the first planar mirror 1301 can tilt towards the side where the refractive curved mirror 1200 is located by at most 3°, and C is an obtuse angle. Or, the mirror surfaces of the first planar mirror 1301 and the second planar mirror 1302 are coplanar. Or, one end of the mirror surface of the second planar mirror 1302 far from the first planar mirror 1301 can tilt towards the side where the refractive curved mirror 1200 is located by at most 3°, and C is an angle greater than 180°.

[0053] In some embodiments, to ensure that the light from the linear image source 1100 can be reflected to the first planar mirror 1301 after being incident on the refractive curved mirror 1200 and the reflection path and reflection times of the light between the refractive curved mirror 1200 and the first planar mirror 1301 are reasonable, the incident angle of the light from the linear image source 1100 also needs to be designed accordingly.

[0054] Specifically, the incident angle of the light from the linear array image source 1100 on the refractive curved mirror 1200 is B, satisfying: 3° ≤ B ≤ 12°. It should be noted that the incident angle refers to the angle between the incident light and the normal of the incident surface.

[0055] If B is less than 3°, it will cause the light to be unable to propagate to the first planar mirror 1301, or cause the number of reflections of the light between the refractive curved mirror 1200 and the first planar mirror 1301 to be insufficient. If B is greater than 12°, it will cause the reflection path of the light on the refractive curved mirror 1200 to deviate too far away from the second planar mirror 1302, thereby making it difficult for the light to be finally reflected to the second planar mirror 1302, and causing a significant increase in the thickness of the imaging module 1000.

[0056] In some examples, it satisfies: 5° ≤ B ≤ 12°.

[0057] Regarding the structure of the imaging module 1000, there are at least the following alternative embodiments.

[0058] In some alternative embodiments, the imaging module 1000 includes a solid light-transmitting structure 1400 and a linear array image source 1100. The structure of the linear array image source 1100 is as described above. The surface of the solid light-transmitting structure 1400 is coated with a reflective film to form the refractive curved mirror 1200, the first planar mirror 1301, and the second planar mirror 1302, and the first planar mirror 1301 is closer to the exit surface of the imaging module 1000 than the second planar mirror 1302.

[0059] It can be understood that the reflection of light in the solid light-transmitting structure 1400 is the propagation of light through a light-transmitting medium.

[0060] It should be noted that when the inside of the imaging module 1000 is hollow and the light is propagated by air, the outgoing light will be refracted (the light direction changes) when it enters the optical waveguide lens 2000. If the light is propagated by the light-transmitting medium of the solid light-transmitting structure 1400 in the imaging module 1000, the outgoing light will not be refracted (the light direction does not change) when it enters the optical waveguide lens 2000. However, since the light angle in the optical waveguide lens 2000 is determined and cannot be changed, in this case, if the positions of the first planar mirror 1301 and the second planar mirror 1302 are not changed, it will be difficult to obtain the expected light direction in the optical waveguide lens 2000.

[0061] Light from the linear image source 1100 is incident on the solid light-transmitting structure 1400, and the light is deflected toward the side where the first planar mirror 1301 is located. The light is reflected at least twice between the refractive curved mirror 1200 and the first planar mirror 1301. Then, the refractive curved mirror 1200 reflects the light to the second planar mirror 1302, and the light is emitted from the imaging module 1000 after being reflected by the second planar mirror 1302. It should be noted that the second planar mirror 1302 reflects the light once.

[0062] The angle between the mirror surface of the first planar mirror 1301 and the chord of the curved surface of the refractive curved mirror 1200 is A, satisfying: 2° ≤ A ≤ 8°.

[0063] The angle between the mirror surfaces of the first planar mirror 1301 and the second planar mirror 1302 is C, satisfying: 140° ≤ C ≤ 150°.

[0064] To ensure that the light reflected by the second planar mirror 1302 can be emitted from the imaging module 1000, the position of the second planar mirror 1302 also needs to be designed accordingly. Specifically, the angle between the mirror surface of the second planar mirror 1302 and the chord of the curved surface of the refractive curved mirror 1200 is E, satisfying: 30° ≤ E ≤ 40°.

[0065] It can be understood that if the value of E exceeds the above range, the light emitted from the imaging module 1000 cannot be coupled into the optical waveguide lens 2000. Even if the light is coupled into the optical waveguide lens 2000, the field of view of the entire near-eye display device will be reduced.

[0066] Based on the above introduction of the relevant structure of the imaging module 1000, the structure and display method of the near-eye display device are supplemented and described below.

[0067] The display method of the near-eye display device is as follows: Light from the linear image source 1100 is incident on the refractive curved mirror 1200, and at least two light reflections occur between the refractive curved mirror 1200 and the first planar mirror 1301. The refractive curved mirror 1200 reflects the light to the second planar mirror 1302, and the second planar mirror 1302 reflects the light and emits it from the imaging module 1000 to the optical waveguide lens 2000. The second planar mirror 1302 reflects the light once. The light enters the optical waveguide lens 2000 and propagates from the transmission surface 2100 of the optical waveguide lens 2000 to the scanning MEMS galvanometer 3000. The scanning MEMS galvanometer 3000 reflects the light and makes the light enter the optical waveguide lens 2000 from the transmission surface 2100. The light propagates in the optical waveguide lens 2000, and the optical waveguide lens 2000 splits the light and emits it. The split light is emitted from the optical waveguide lens 2000 to the user's eyeball, and thus the user can observe a good imaging effect.

[0068] After being processed by the scanning MEMS galvanometer 3000 and the optical waveguide lens 2000, the light is split and emitted to the area viewed by the human eye 4000, so that the user can observe the complete imaging picture.

[0069] It should be noted that the transmissive surface 2100 is configured as a light-transmitting inclined surface. Specifically, the transmissive surface 2100 is arranged to be inclined relative to the longitudinal extension direction of the light guide lens 2000.

[0070] Furthermore, the incident angle D of the light reflected by the second plane reflector 1302 entering the light guide lens 2000 is D, and the incident angle D of the light processed by the above-mentioned refractive curved surface reflector 1200, the first plane reflector 1301 and the second plane reflector 1302 entering the light guide lens 2000 satisfies: 60°≤D≤80°.

[0071] If D is less than 60°, the image quality will be affected by stray light reflected from the transmission surface 2100 of the optical waveguide lens 2000. If D is greater than 80°, the transmittance of light will be greatly reduced.

[0072] In some embodiments, the optical waveguide lens 2000 is configured as an arrayed optical waveguide lens, and light propagates in the arrayed optical waveguide lens by total reflection until it encounters a dichroic reflective film inside the arrayed optical waveguide lens, thereby achieving dichroic and emission of the light.

[0073] In some other alternative implementations, the light waveguide lens 2000 is configured as a diffraction light waveguide lens.

[0074] Of course, it is understandable that the optical waveguide lens 2000 can also be configured as other lens structures capable of achieving light splitting.

[0075] Based on the above introduction of the imaging module 1000 , the near-eye display device and the display method, the structure of the linear array image source 1100 is supplemented as follows.

[0076] In some implementations, the line array image source 1100 is configured as a single-row pixel image source.

[0077] In some other alternative implementations, the linear array image source 1100 is configured as a multi-row pixel image source to increase the brightness of the image observed by the human eye.

[0078] For example, the linear array image source 1100 is configured as a five-line pixel image source. In the image displayed in the human eye observation area, the near-eye display device displays image information of lines 1 to 5 of the frame in the first line cycle, displays image information of lines 2 to 6 of the frame in the second line cycle, and displays image information of lines 3 to 7 of the frame in the third line cycle. This scrolling continues until the last five lines of the frame are displayed.

[0079] The content of the display method in the present application will be described in detail below in conjunction with specific embodiments. It should be noted that the following description is only for illustrative purposes and not a specific limitation of the present application.

[0080] In some embodiments, in the imaging module 1000, the light of the linear image source 1100 is incident on the refractive curved mirror 1200, and the light is reflected twice between the refractive curved mirror 1200 and the first plane mirror 1301.

[0081] The specific reflection path of the light between the refractive curved mirror 1200 and the first plane mirror 1301 is as follows:

[0082] The light emitted by the linear image source 1100 passing through the incident slot 1303 is the first incident light of the refractive curved mirror 1200, and the light reflected by the refractive curved mirror 1200 is the first reflected light of the refractive curved mirror 1200, and is located on the side of the first incident light away from the second plane mirror 1302;

[0083] The first reflected light of the refractive curved mirror 1200 is the first incident light of the first plane mirror 1301, and the light reflected by the first plane mirror 1301 is the first reflected light of the first plane mirror 1301, and is located on the side of the first incident light of the first plane mirror 1301 away from the second plane mirror 1302;

[0084] The first reflected light of the first plane mirror 1301 is the second incident light of the refractive curved mirror 1200, and the light reflected by the refractive curved mirror 1200 is the second reflected light of the refractive curved mirror 1200, and is located on the side of the second incident light of the refractive curved mirror 1200 away from the second plane mirror 1302;

[0085] The second reflected light of the refractive curved mirror 1200 is the second incident light of the first plane mirror 1301, and the light reflected by the first plane mirror 1301 is the second reflected light of the first plane mirror 1301, and is located on the side of the second incident light of the first plane mirror 1301 close to the second plane mirror 1302;

[0086] The second reflected light of the first plane mirror 1301 is the third incident light of the refractive curved mirror 1200, and the light reflected by the refractive curved mirror 1200 is the third reflected light of the refractive curved mirror 1200, and is located on the side of the third incident light of the refractive curved mirror 1200 close to the second plane mirror 1302;

[0087] The third reflected light of the refractive curved mirror 1200 is the incident light of the second planar mirror 1302, and the light reflected by the second planar mirror 1302 is the reflected light of the second planar mirror 1302, and is located on the side of the incident light of the second planar mirror 1302 away from the first planar mirror 1301;

[0088] The reflected light of the second planar mirror 1302 exits from the imaging module 1000 and is incident on the optical waveguide lens 2000.

[0089] It can be understood that the process of the light exiting from the imaging module 1000 being processed by the scanning MEMS galvanometer 3000 and the optical waveguide lens 2000 is as described above.

[0090] It should be noted that the reflected light of the second planar mirror 1302 can enter the optical waveguide lens 2000 at a large incident angle of 60° to 80°.

[0091] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. An imaging module, characterized in that: It includes a linear image source, a refractive curved mirror, a first planar mirror, and a second planar mirror. Both the first planar mirror and the second planar mirror are located on the same side as the mirror surface of the refractive curved mirror. The first planar mirror and the second planar mirror are arranged at intervals to form an incident slot for the light of the linear image source. Among them, the light of the linear image source is reflected at least twice between the refractive curved mirror and the first planar mirror. The refractive curved mirror reflects the light to the second planar mirror, and after being reflected by the second planar mirror, it exits from the imaging module. The second planar mirror is closer to the exit surface of the imaging module than the first planar mirror.

2. The imaging module according to claim 1, wherein: The imaging module is alternatively provided to include a solid light-transmitting structure and the linear image source. A reflective film is coated on the surface of the solid light-transmitting structure to form the refractive curved mirror, the first planar mirror, and the second planar mirror. The first planar mirror is closer to the exit surface of the imaging module than the second planar mirror.

3. The imaging module according to claim 1 or 2, characterized in that: The included angle between the mirror surface of the first planar mirror and the chord of the curved surface of the refractive curved mirror is A, satisfying: 2° ≤ A ≤ 8°.

4. The imaging module according to claim 1, wherein: The included angle between the mirror surfaces of the first planar mirror and the second planar mirror is C, satisfying: 177° ≤ C ≤ 183°.

5. The imaging module according to claim 2, wherein: The included angle between the mirror surfaces of the first planar mirror and the second planar mirror is C, satisfying: 140° ≤ C ≤ 150°.

6. The imaging module according to claim 1 or 2, wherein: The incident angle of the light of the linear image source on the refractive curved mirror is B, satisfying: 3° ≤ B ≤ 12°.

7. The imaging module according to claim 2, wherein: The included angle between the mirror surface of the second planar mirror and the chord of the curved surface of the refractive curved mirror is E, satisfying: 30° ≤ E ≤ 40°.

8. A near-eye display device, characterized in that: It includes a scanning MEMS galvanometer, an optical waveguide lens, and the imaging module according to any one of claims 1 to 7. The side of the imaging module where light exits is close to the optical waveguide lens. One end of the optical waveguide lens close to the imaging module is provided with a transmissive surface, and the transmissive surface is set as a light-transmitting inclined surface. The scanning MEMS galvanometer is close to the transmissive surface.

9. The near-eye display device according to claim 8, wherein: The optical waveguide lens is set as an array optical waveguide lens or a diffractive optical waveguide lens.

10. A head-mounted display device, characterized in that: It includes a near-eye display device according to claim 8 or 9.

Images