Virtual reality module

Abstract

The virtual reality module comprises a positioning device and an eyepiece device. The positioning device comprises a first lens barrel, a lens set accommodated in the first lens barrel, and at least one spacer. The lens set comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The at least one spacer comprises a first spacer between the first lens and the second lens. The eyepiece device comprises a second lens barrel, a reflection assembly accommodated in the second lens barrel, at least one isolator, and a first lens, a second lens, and a third lens arranged in sequence along a second optical axis. The at least one isolator comprises a first isolator between the first lens and the second lens. Half of a maximum field of view angle of the positioning device Semi-FOVn, half of a maximum field of view angle of the eyepiece device Semi-FOV, an inner diameter d0sn of a front end face of the first lens barrel closest to an object side, an inner diameter d1sn of an object side face of the first spacer, an inner diameter d1s of a first side face of the first isolator, and an inner diameter d0s of a front end face of the second lens barrel closest to the first side face satisfy the following condition: 0.5 < Tan(Semi-FOVn)*(d0sn-d1sn) / |Tan(Semi-FOV)*(d1s-d0s)| < 7.0.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to a virtual reality module. Background Technology

[0002] Since the concept of the "metaverse" was proposed, AR (Augmented Reality) / VR (Virtual Reality) has ushered in a tremendous opportunity for development. As a human-computer interaction medium, VR headsets will be equipped with more and more lenses in the future to enhance the user's immersive experience, including lenses for interacting with reality, lenses for capturing the position of the user's hands, and lenses for tracking eye movements.

[0003] Current virtual reality devices can provide users with a better immersive experience when they have a large field of view, but they are also more prone to internal reflection stray light, resulting in poor image quality and failing to meet users' needs for immersion and experience in virtual reality. Summary of the Invention

[0004] According to one aspect of this application, a virtual reality module is provided, including a positioning device and an eyepiece device. The positioning device includes a first lens barrel, a lens group housed within the first lens barrel, and at least one spacer. The lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from the object side to the image side along a first optical axis. The at least one spacer includes a first spacer located between the first lens and the second lens. The eyepiece device includes an imaging unit, which includes a second lens barrel, a reflective component housed within the second lens barrel, at least one spacer, and a spacer arranged sequentially from the object side to the image side along a second optical axis. The first, second, and third lenses are arranged sequentially on the second side, and at least one spacer includes a first spacer located between the first and second lenses; wherein, half of the maximum field of view of the positioning device (Semi-FOVn), half of the maximum field of view of the eyepiece device (Semi-FOV), the inner diameter d0sn of the front end face of the first lens barrel closest to the object side, the inner diameter d1sn of the object side side of the first spacer, the inner diameter d1s of the first side side of the first spacer, and the inner diameter d0s of the front end face of the second lens barrel closest to the first side satisfy: 0.5 < Tan(Semi-FOVn). (d0sn-d1sn) / |Tan(Semi-FOV) (d1s-d0s)|<7.0.

[0005] In one or more embodiments, the effective focal length f of the eyepiece device, the maximum height L of the second lens tube, the effective focal length fn of the positioning device, and the maximum height Ln of the first lens tube satisfy: 0.5 < f / L + fn / Ln < 1.5.

[0006] In one or more embodiments, the inner diameter d0s of the front end face of the second lens barrel closest to the first side, the effective focal length f1 of the first lens, the distance EP01 between the front end face of the second lens barrel and the first spacer, and the radius of curvature R2 of the second side surface of the first lens satisfy: -24.0 < d0s (f1 / EP01) / R2<-7.0.

[0007] In one or more embodiments, the radius of curvature R2 of the second side surface of the first lens, the radius of curvature R6 of the second side surface of the third lens, the inner diameter d0m of the rear end face of the second lens barrel closest to the second side, and the outer diameter D1s of the first side surface of the first spacer satisfy: -20 < |R6| d0m| / (R2 D1s) < -3.0.

[0008] In one or more embodiments, the reflective assembly includes a reflective polarizing element and a quarter-wave plate, wherein the effective focal length f of the eyepiece device, the center thickness dQWP of the quarter-wave plate on the second optical axis, the center thickness dRP of the reflective polarizing element on the second optical axis, the maximum thickness CP1 of the first spacer, and the spacing EP01 between the front end face of the second lens barrel and the first spacer satisfy: 1.0 < f / (dRP+dQWP+CP1+EP01) < 3.0.

[0009] In one or more embodiments, the radius of curvature R1n of the object-side surface of the first lens, the outer diameter D0sn of the front end face of the first lens barrel closest to the object side, the inner diameter d0sn of the front end face of the first lens barrel closest to the object side, the effective focal length f1n of the first lens, and the refractive index N1n of the first lens satisfy: -1.5 < R1n (D0sn / d0sn) / (f1n N1n) < -0.5.

[0010] In one or more embodiments, at least one spacer further includes a second spacer located between the second lens and the third lens, wherein the effective focal length f1n of the first lens, the effective focal length f2n of the second lens, the outer diameter D1mn of the image-side surface of the first spacer, the inner diameter d1mn of the image-side surface of the first spacer, and the spacing EP12n between the first spacer and the second spacer satisfy: f1n < 0, f2n < 0, 1.5 < (f2n) EP12n) / f1n (D1mn-d1mn)<3.5.

[0011] In one or more embodiments, at least one spacer further includes a second spacer located between the second lens and the third lens, wherein the radius of curvature R1n of the object side of the first lens, the radius of curvature R2n of the image side of the first lens, the outer diameter D1sn of the object side of the first spacer, and the inner diameter d2sn of the object side of the second spacer satisfy: 7.0 < R1n D1sn / (R2n d2sn)<11.5.

[0012] In one or more embodiments, at least one spacer further includes a second spacer located between the second lens and the third lens, and a third spacer located between the third lens and the fourth lens, wherein the spacing EP23n between the second spacer and the third spacer and the air spacing T23n between the second lens and the third lens on the first optical axis satisfy: 0 < EP23n / T23n < 1.2.

[0013] In one or more embodiments, at least one spacer further includes a third spacer located between the third lens and the fourth lens, wherein the radius of curvature R6n of the image side of the third lens, the radius of curvature R7n of the object side of the fourth lens, the outer diameter D3mn of the image side of the third spacer, and the inner diameter d3mn of the image side of the third spacer satisfy: 3.5 < |R6n + R7n| / D3mn + |R6n - R7n| / d3mn < 8.5.

[0014] In one or more embodiments, at least one spacer further includes a fourth spacer located between the fourth lens and the fifth lens, wherein the effective focal length f5n of the fifth lens, the radius of curvature R10n of the image-side surface of the fifth lens, the inner diameter d0mn of the rear end face of the first lens barrel closest to the imaging plane, and the outer diameter D4mn of the image-side surface of the fourth spacer satisfy: -3.0 < f5n D4mn / R10n d0mn < -2.0.

[0015] In one or more embodiments, at least one spacer further includes a fourth spacer located between the fourth lens and the fifth lens, wherein the maximum thickness CP4n of the fourth spacer, the spacing EP34n between the third spacer and the fourth spacer, the air spacing T45n between the fourth lens and the fifth lens on the first optical axis, and the center thickness CT3n of the third lens on the first optical axis satisfy: 4.5 < EP34n / CT3n + T45n / CP4n < 5.5.

[0016] In one or more embodiments, at least one spacer further includes a fourth spacer located between the fourth lens and the fifth lens, wherein the combined focal length f45n of the fourth lens and the fifth lens, the center thickness CT4n of the fourth lens on the first optical axis, the center thickness CT5n of the fifth lens on the first optical axis, the outer diameter D4sn of the object side of the fourth spacer, the inner diameter d4sn of the object side of the fourth spacer, and the maximum thickness CP4n of the fourth spacer satisfy: -88.0 < f45n / (D4sn-d4sn) + f45n / (CT4n+CT5n+CP4n) < -80.0.

[0017] According to another aspect of this application, a virtual reality module is provided, including a positioning device and an eyepiece device. The positioning device includes a first lens barrel, a lens group housed within the first lens barrel, and at least one spacer. The lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from the object side to the image side along a first optical axis. The at least one spacer includes a first spacer located between the first lens and the second lens. The eyepiece device includes an imaging unit, which includes a second lens barrel, a reflective assembly housed within the second lens barrel, at least one spacer, and a first lens, a second lens, and a third lens arranged sequentially from the first side to the second side along a second optical axis. The at least one spacer includes a first spacer located between the first lens and the second lens. The radius of curvature R2 of the second side surface of the first lens, the radius of curvature R6 of the second side surface of the third lens, the inner diameter d0m of the rear end face of the second lens barrel closest to the second side, and the outer diameter D1s of the object side surface of the first spacer satisfy: -20 < |R6|. d0m| / (R2 D1s) < -3.0.

[0018] The virtual reality module provided according to the embodiments of this application may include a positioning device and an eyepiece device. The eyepiece device and the positioning device have been optimized. While satisfying the large field of view of the positioning device and the eyepiece device, the internal reflection stray light of the positioning device and the eyepiece device can be effectively controlled by controlling the inner diameter of the first isolation member of the eyepiece device and the first spacer member of the positioning device and the inner diameter of the front end face of the lens barrel. This improves the imaging quality and enhances the user's immersion and experience in virtual reality.

[0019] According to the virtual reality module provided in the embodiments of this application, by constraining the curvature radius of the second side surface of the first lens and the second side surface of the third lens of the eyepiece device, it is beneficial to correct system aberrations; at the same time, by controlling the inner diameter of the rear end face of the second lens barrel and the outer diameter of the side surface of the first isolation member, it is possible to ensure that the step difference between each component is small, which is beneficial to ensure assembly stability. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 A schematic diagram of the structure of a virtual reality module provided according to an embodiment of this application is shown;

[0022] Figure 2 A schematic diagram showing some optical parameters of a positioning device according to an embodiment of this application is provided;

[0023] Figure 3 A schematic diagram of the positioning device according to an embodiment of this application is shown;

[0024] Figure 4 A schematic diagram of the eyepiece device according to an embodiment of this application is shown;

[0025] Figure 5 A schematic diagram showing some optical parameters of the imaging section of the eyepiece device according to an embodiment of this application is provided;

[0026] Figure 6 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 1 of this application is shown;

[0027] Figure 7 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 2 of this application is shown;

[0028] Figure 8 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 3 of this application is shown;

[0029] Figure 9A , Figure 9B and Figure 9C The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the eyepiece devices according to embodiments one to three of this application are shown respectively.

[0030] Figure 10 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 4 of this application is shown;

[0031] Figure 11 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 5 of this application is shown;

[0032] Figure 12 A schematic diagram of the imaging section of the eyepiece device according to Embodiment Six of this application is shown;

[0033] Figure 13A , Figure 13B and Figure 13CThe on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the eyepiece devices according to embodiments four to six of this application are shown respectively.

[0034] Figure 14 A schematic diagram of the positioning device according to Embodiment 7 of this application is shown;

[0035] Figure 15 A schematic diagram of the positioning device according to Embodiment 8 of this application is shown;

[0036] Figure 16 A schematic diagram of the positioning device according to Embodiment 9 of this application is shown;

[0037] Figure 17A , Figure 17B and Figure 17C The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the positioning devices according to embodiments seven to nine of this application are shown respectively.

[0038] Figure 18 A schematic diagram of the positioning device according to Embodiment 10 of this application is shown;

[0039] Figure 19 A schematic diagram of the positioning device according to Embodiment Eleven of this application is shown;

[0040] Figure 20 A schematic diagram of the positioning device according to Embodiment Twelve of this application is shown; and

[0041] Figure 21A , Figure 21B and Figure 21C The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the positioning devices according to embodiments 10 to 12 of this application are shown respectively. Detailed Implementation

[0042] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0044] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0045] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0046] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0047] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so specified herein.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

[0049] The features, principles and other aspects of this application are described in detail below.

[0050] refer to Figure 1As shown, the first aspect of this application provides a virtual reality module 10, which may include an eyepiece device 100 and a positioning device 200. The positioning device 200 is used to image a real scene, and the formed real image is transmitted to the eyepiece device 100 in the form of an electrical signal; the eyepiece device 100 is used to project a virtual image disposed on an image surface on a second side and the aforementioned real image. By combining the eyepiece device 100 and the positioning device 200, virtual reality fusion of the virtual reality module can be realized.

[0051] The eyepiece device 100 may be configured as a folding optical system, and there may be one or more of them. The positioning device 200 may be configured as a video perspective optical system, and there may be one or more of them. In one example, the virtual reality module 10 may include two symmetrically arranged eyepiece devices 100. In one example, the virtual reality module 10 also includes a body, the eyepiece devices 100 may be disposed inside the body, and the positioning devices 200 may be disposed outside the body.

[0052] Figure 2 and Figure 3 A schematic diagram of the structural arrangement of the positioning device 200 according to an embodiment of this application is shown. Figure 2 As shown, in an exemplary embodiment, the positioning device 200 may include a first lens barrel P0n, a lens group, and at least one spacer. The lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The at least one spacer may include a first spacer P1n located between the first lens E1n and the second lens E2n. The lens group and the at least one spacer are housed within the first lens barrel P0n.

[0053] According to an exemplary embodiment of this application, each of the first lens E1n to the fifth lens E5n can have an optical region for optical imaging and a non-optical region extending outward from the outer periphery of the optical region. Generally speaking, the optical region refers to the area of ​​the lens used for optical imaging, while the non-optical region is the structural area of ​​the lens. During the assembly of the optical imaging lens, spacer elements can be set at the non-optical regions of each lens using processes such as adhesive bonding, and each lens can be connected to the first lens barrel, i.e., each lens abuts against the inner wall of the first lens barrel. During the imaging process of the optical imaging lens, the optical regions of each lens can transmit light from the object to form an optical path, forming the final optical image; while the non-optical regions of each assembled lens are housed in the lens barrel, which cannot transmit light, thus the non-optical regions do not directly participate in the imaging process of the optical imaging lens. It should be noted that, for ease of description, this application describes each lens as divided into two parts: an optical region and a non-optical region. However, it should be understood that the optical region and the non-optical region of the lens can be formed as a whole during the manufacturing process, rather than as two separate parts.

[0054] In an exemplary embodiment, the first spacer P1n located between the first lens E1n and the second lens E2n can contact the non-optical region of the image-side surface of the first lens E1n, and simultaneously contact the non-optical region of the object-side surface of the second lens E2n. Exemplarily, the first spacer P1n can directly contact the image-side surface of the first lens E1n by abutting against the non-optical region of the image-side surface. Depending on actual needs, the first spacer P1n can partially or completely abut against the non-optical region of the image-side surface of the first lens E1n.

[0055] In other exemplary embodiments, at least one spacer in the positioning device may include at least one of the following: a first spacer located between a first lens and a second lens and in direct contact with the image-side surface of the first lens; a second spacer located between a second lens and a third lens and in direct contact with the image-side surface of the second lens; a third spacer located between a third lens and a fourth lens and in direct contact with the image-side surface of the third lens; and a fourth spacer located between a fourth lens and a fifth lens and in direct contact with the image-side surface of the fourth lens. Proper use of spacers can effectively mitigate stray light risks, reduce interference with image quality, and thereby improve the imaging quality of the camera system components.

[0056] Figure 3 A schematic diagram showing some parameters of the positioning device 200 according to an embodiment of this application is provided. Figure 3As shown, Ln represents the maximum height of the first lens barrel P0n along the optical axis; EP01n represents the distance between the front end face of the first lens barrel P0n near the object side and the object side face of the first spacer along the optical axis; EP34n represents the distance between the image side face of the third spacer and the object side face of the fourth spacer along the first optical axis; CPn4 represents the maximum thickness of the fourth spacer along the first optical axis; D0sn represents the outer diameter of the front end face of the first lens barrel closest to the object side; d0sn represents the inner diameter of the front end face of the first lens barrel closest to the object side; D1sn represents the outer diameter of the object side face of the first spacer; d1sn represents the inner diameter of the object side face of the first spacer; D4mn represents the outer diameter of the image side face of the fourth spacer; d4mn represents the inner diameter of the image side face of the fourth spacer; D3mn represents the outer diameter of the image side face of the third spacer; d0mn represents the inner diameter of the rear end face of the first lens barrel closest to the image plane, etc.

[0057] Combination Figure 4 and Figure 5 As shown, in an exemplary embodiment, the eyepiece device 100 includes an imaging unit, which may include a second lens barrel P0 and a reflective assembly, a lens group, and at least one spacer housed within the second lens barrel P0. The lens group may include a first lens E1, a second lens E2, and a third lens E3 arranged sequentially from a first side to a second side along a second optical axis. The at least one spacer may include a first spacer P1 located between the first lens E1 and the second lens E2 and capable of directly contacting the second side surface of the first lens E1. In an exemplary embodiment, the first side of the eyepiece device 100 may be, for example, the human eye side, and the second side may be, for example, the display screen side.

[0058] In an exemplary embodiment, the eyepiece device 100 further includes a receiving section J located on a first side and a transmitting section F located on a second side. Accordingly, the first side surface of each optical element (first lens E1, second lens E2, third lens E3) of the imaging section can be a surface close to the human eye, and the second side surface can be a surface close to the display screen.

[0059] As an exemplary embodiment, the reflective assembly of the imaging unit may include a reflective polarizing element (RP) and a quarter-wave plate (QWP). The reflective polarizing element RP and the quarter-wave plate QWP may be located on a first side of the first lens E1 or on a first side of the second lens E2.

[0060] In an exemplary embodiment, the eyepiece device 100 may further include a partial reflective element (BS). The partial reflective element BS may be, for example, a partial reflective layer attached to or deposited on the first side of the second lens E2, or a partial reflective layer disposed on the second side of the third lens E3. The partial reflective layer has a semi-transmissive and semi-reflective effect on light. By providing a partial reflective layer and combining it with a reflective polarizing element and a quarter-wave plate, light can be reflected multiple times, thereby effectively reducing the overall length of the eyepiece device.

[0061] Figure 5 A schematic diagram showing some parameters of the eyepiece device 100 according to an embodiment of this application is provided. Figure 3 As shown, Figure 5 As shown, L represents the maximum height of the second lens barrel P0 along the second optical axis; EP01 represents the distance between the front end face of the second lens barrel near the first side and the object side face of the first isolator along the second optical axis; EP12 represents the distance between the image side face of the first isolator and the object side face of the second isolator along the second optical axis; CP1 represents the maximum thickness of the first isolator along the second optical axis; CP2 represents the maximum thickness of the second isolator along the second optical axis; D0s represents the outer diameter of the front end face of the second lens barrel P0 closest to the first side; d0s represents the inner diameter of the front end face of the second lens barrel P0 closest to the first side; D1s represents the outer diameter of the object side face of the first isolator; d1s represents the inner diameter of the object side face of the first isolator; D2m represents the outer diameter of the image side face of the second isolator; d2m represents the inner diameter of the image side face of the second isolator; D0m represents the outer diameter of the rear end face of the second lens barrel closest to the second side; d0m represents the inner diameter of the rear end face of the second lens barrel closest to the second side, etc.

[0062] In an exemplary embodiment, the optical surfaces of the lenses in the lens group of the eyepiece device 100 can be spherical or aspherical. Aspherical lenses have better radius of curvature characteristics, which has the advantage of improving distortion aberration and astigmatism aberration. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0063] In an exemplary embodiment, the second side surface of the first lens E1 of the eyepiece device 100 can be a convex surface. The second side surface of the second lens E2 can be a concave surface. The first side surface of the third lens E3 can be a convex surface, and the second side surface can be either a convex surface or a flat surface.

[0064] According to the virtual reality module 10 of the exemplary embodiment of this application, the eyepiece device 100 is used to transmit the virtual image of the display screen to the user's eyes, the positioning device 200 is used to image the real scene, and transmit the formed real image to the display screen of the eyepiece device 100 through the chip of the positioning device 200. The eyepiece device 100 then transmits the real image on the display screen to the user, so that the user can see the image after the virtual scene and the real scene are merged, thereby improving the visual immersion of the virtual reality module.

[0065] In an exemplary embodiment, an image surface may be provided on the second side of the eyepiece device 100. A display screen may be provided on the image surface. The image light from the display screen is finally projected to the user's eye after being refracted and reflected multiple times by a third lens E3, a second lens E2, a first lens E1, a reflective polarizing element RP, a quarter-wave plate QWP, and a partial reflective element BS.

[0066] In an exemplary implementation, the virtual reality module may satisfy the following condition: 0.5 < Tan(Semi-FOVn) (d0sn-d1sn) / |Tan(Semi-FOV) (d1s-d0s)|<7.0, where Semi-FOVn is half of the maximum field of view of the positioning device, Semi-FOV is half of the maximum field of view of the eyepiece device, d0sn is the inner diameter of the front face of the first lens barrel closest to the object side, d1sn is the inner diameter of the object side of the first spacer, d1s is the inner diameter of the first side of the first isolation member, and d0s is the inner diameter of the front face of the second lens barrel closest to the first side. By satisfying this condition, when the positioning device angle Semi-FOVn>80° and the eyepiece lens device Semi-FOV>50°, by controlling the inner diameters of the first isolation member of the eyepiece device and the first spacer member of the positioning device, as well as the inner diameters of the front faces of the first and second lens barrels, the internal stray light of the eyepiece device and the positioning device can be effectively controlled, improving image quality and enhancing user experience.

[0067] In an exemplary embodiment, the virtual reality module can satisfy the following condition: 0.5 < f / L + fn / Ln < 1.5, where f is the effective focal length of the eyepiece device, L is the maximum height of the second lens barrel, fn is the effective focal length of the positioning device, and Ln is the maximum height of the first lens barrel. By controlling the effective focal lengths of the eyepiece device and the positioning device, the system's field of view can be constrained, achieving the large field of view characteristics of both optical devices. On the other hand, by constraining the maximum height of the two optical devices, the size is smaller while ensuring their manufacturability and optical performance, which is beneficial for the layout of the two optical devices in the overall machine.

[0068] In an exemplary embodiment, the virtual reality module may satisfy the following condition: -24.0 < d0s (f1 / EP01) / R2 < -7.0, where d0s is the inner diameter of the front face of the second lens barrel closest to the first side, f1 is the effective focal length of the first lens, EP01 is the gap between the front face of the second lens barrel and the first spacer, and R2 is the radius of curvature of the second side surface of the first lens. By controlling the above parameters, on the one hand, the optical power of the first lens and the radius of curvature of the second side surface of the first lens are constrained, which is beneficial to the direction of light and the control of the surface shape; on the other hand, the wall thickness of the second lens barrel and the edge thickness of the first lens are indirectly controlled, achieving the best forming structure and assembly stability.

[0069] In an exemplary embodiment, the virtual reality module may satisfy the following condition: -20 < |R6 d0m| / (R2 D1s) < -3.0, where R2 is the radius of curvature of the second side surface of the first lens, R6 is the radius of curvature of the second side surface of the third lens, d0m is the inner diameter of the rear end face of the second lens barrel closest to the second side, and D1s is the outer diameter of the first side surface of the first spacer. By controlling the above parameters, the radii of curvature of the second side surfaces of the first and third lenses of the eyepiece device are constrained, which is beneficial for correcting system aberrations; at the same time, by controlling the inner diameter of the rear end face of the second lens barrel and the outer diameter of the first side surface of the first spacer, the step difference between the components can be kept small, which is beneficial for ensuring assembly stability.

[0070] In an exemplary embodiment, the reflective component in the imaging section of the eyepiece device may include a reflective polarizing element and a quarter-wave plate located on the first side of the first lens; the virtual reality module may satisfy the following condition: 1.0 < f / (dRP+dQWP+CP1+EP01) < 3.0, where f is the effective focal length of the eyepiece device, dQWP is the center thickness of the quarter-wave plate on the second optical axis, dRP is the center thickness of the reflective polarizing element on the second optical axis, CP1 is the maximum thickness of the first isolator, and EP01 is the gap between the front end face of the second lens barrel and the first isolator. By controlling the above parameters, on the one hand, the effective focal length of the eyepiece device is controlled, constraining the system field of view of the eyepiece device and ensuring the large field of view characteristic of the eyepiece system; on the other hand, the thickness of the first lens and the second lens mechanism in the eyepiece device is indirectly constrained, thereby ensuring assembly.

[0071] In an exemplary embodiment, the virtual reality module can satisfy: -1.5 < R1n (D0sn / d0sn) / (f1n N1n) < -0.5, where R1n is the radius of curvature of the object-side surface of the first lens, D0sn is the outer diameter of the front end face of the first lens barrel closest to the object side, d0sn is the inner diameter of the front end face of the first lens barrel closest to the object side, f1n is the effective focal length of the first lens, and N1n is the refractive index of the first lens. By controlling the inner and outer diameters of the front end face of the first lens barrel of the positioning device, the manufacturability of the first lens barrel is ensured under the premise that effective light can completely enter the optical system; by controlling the effective focal length, refractive index, and radius of curvature of the object-side surface of the first lens, the optical power of the first lens can be effectively constrained, ensuring that the positioning device has a large field of view.

[0072] In an exemplary embodiment, at least one spacer in the positioning device further includes a second spacer located between the second lens and the third lens and capable of directly contacting the image-side surface of the second lens. The virtual reality module can satisfy: f1n < 0, f2n < 0, 1.5 < (f2n) EP12n) / f1n (D1mn-d1mn) < 3.5, where f1n is the effective focal length of the first lens, f2n is the effective focal length of the second lens, D1mn is the outer diameter of the image-side surface of the first spacer, d1mn is the inner diameter of the image-side surface of the first spacer, and EP12n is the spacing between the first and second spacers. By controlling the above parameters, the optical power of the first and second lenses in the positioning device is effectively controlled, which is beneficial to the light path; at the same time, by constraining the inner and outer diameters of the image-side surface of the first spacer and the thickness of the second lens, stray light generated by excess light can be blocked on the one hand, and the forming strength and assembly stability of the lenses can be guaranteed on the other hand.

[0073] In an exemplary embodiment, at least one spacer in the positioning device further includes a second spacer located between the second lens and the third lens and capable of directly contacting the image-side surface of the second lens. The virtual reality module can satisfy: 7.0 < R1n D1sn / (R2n d2sn) < 11.5, where R1n is the radius of curvature of the object side of the first lens, R2n is the radius of curvature of the image side of the first lens, D1sn is the outer diameter of the object side of the first spacer, and d2sn is the inner diameter of the object side of the second spacer. By controlling the radius of curvature of the object side and the image side of the first lens of the positioning device, the surface shape of the two surfaces of the first lens is constrained, ensuring the uniformity and manufacturability of the first lens; by controlling the outer diameter of the object side of the first spacer and the inner diameter of the object side of the second spacer, the manufacturability of the first spacer and the second spacer is ensured while satisfying the premise of supporting the lens and blocking stray light.

[0074] In an exemplary embodiment, at least one spacer in the positioning device further includes a second spacer located between the second lens and the third lens and capable of directly contacting the image-side surface of the second lens, and a third spacer located between the third lens and the fourth lens and capable of directly contacting the image-side surface of the third lens. The virtual reality module can satisfy: 0 < EP23n / T23n < 1.2, where EP23n is the spacing between the second spacer and the third spacer, and T23n is the air gap between the second lens and the third lens on the first optical axis. By controlling the ratio of the above two values, it is beneficial to ensure the thickness ratio of the third lens, which facilitates processing and forming.

[0075] In an exemplary embodiment, at least one spacer in the positioning device further includes a third spacer located between the third lens and the fourth lens and capable of directly contacting the image-side surface of the third lens. The virtual reality module satisfies: 3.5 < |R6n + R7n| / D3mn + |R6n - R7n| / d3mn < 8.5, where R6n is the radius of curvature of the image-side surface of the third lens, R7n is the radius of curvature of the object-side surface of the fourth lens, D3mn is the outer diameter of the image-side surface of the third spacer, and d3mn is the inner diameter of the image-side surface of the third spacer. By controlling the above parameters, it is beneficial to achieve the compactness of the entire lens structure, and on the other hand, it is also beneficial to correct off-axis aberration and improve the overall imaging quality of the positioning device.

[0076] In an exemplary embodiment, at least one spacer in the positioning device further includes a fourth spacer located between the fourth lens and the fifth lens and capable of directly contacting the image-side surface of the fourth lens. The virtual reality module can satisfy: -3.0 < f5n D4mn / R10n d0mn < -2.0, where f5n is the effective focal length of the fifth lens, R10n is the radius of curvature of the image-side surface of the fifth lens, d0mn is the inner diameter of the rear end face of the first lens barrel closest to the imaging plane, and D4mn is the outer diameter of the image-side surface of the fourth spacer. By controlling the effective focal length and radius of curvature of the image-side surface of the fifth lens in the positioning device, the optical power and surface shape of the fifth lens can be better constrained, improving the final image quality. On the other hand, by controlling the inner diameter of the rear end face of the first lens barrel and the outer diameter of the image-side surface of the fourth spacer, the force on both sides of the fifth lens can be made uniform, improving the assembly stability.

[0077] In an exemplary embodiment, at least one spacer in the positioning device includes a third spacer located between the third and fourth lenses and capable of directly contacting the image-side surface of the third lens, and a fourth spacer located between the fourth and fifth lenses and capable of directly contacting the image-side surface of the fourth lens. The virtual reality module can satisfy: 4.5 < EP34n / CT3n + T45n / CP4n < 5.5, where CP4n is the maximum thickness of the fourth spacer, EP34n is the gap between the third and fourth spacers, T45n is the air gap between the fourth and fifth lenses on the first optical axis, and CT3n is the center thickness of the third lens on the first optical axis. By controlling the above parameters, on the one hand, the maximum thickness of the fourth spacer and the air gap between the fourth and fifth lenses are ensured to be within a certain range, compensating for performance losses caused by surface processing errors; on the other hand, the center thickness of the third lens and the edge thickness of the fourth lens are controlled, ensuring that the lenses have a suitable thickness ratio, which is beneficial to molding and assembly stability.

[0078] In an exemplary embodiment, at least one spacer in the positioning device includes a fourth spacer located between the fourth lens and the fifth lens and capable of directly contacting the image-side surface of the fourth lens. The virtual reality module satisfies: -88.0 < f45n / (D4sn-d4sn) + f45n / (CT4n+CT5n+CP4n) < -80.0, where f45n is the combined focal length of the fourth and fifth lenses, CT4n is the center thickness of the fourth lens on the first optical axis, CT5n is the center thickness of the fifth lens on the first optical axis, D4sn is the outer diameter of the object-side surface of the fourth spacer, d4sn is the inner diameter of the object-side surface of the fourth spacer, and CP4n is the maximum thickness of the fourth spacer. By controlling the combined focal length of the fourth and fifth lenses in the positioning device, the aberrations generated by the front-end optical elements can be balanced, keeping the overall aberrations at a reasonable level. Furthermore, by controlling the thickness of the fourth and fifth lenses and the inner and outer diameters and thickness of the fourth spacer, the manufacturability of the spacer can be ensured while satisfying the support of the fourth spacer for the lenses.

[0079] In an exemplary embodiment, the virtual reality module of this application may include at least one aperture stop. The aperture stop can constrain the optical path and control the light intensity. The aperture stop may be positioned at an appropriate location on the eyepiece device or the positioning device. In one example, the positioning device 200 may include an aperture stop, which may be located between the second lens and the third lens, or between the third lens and the fourth lens. In one example, the eyepiece device 100 may include, for example, an aperture stop disposed between the first side and the first lens E1.

[0080] In an exemplary embodiment, the virtual reality module of this application may optionally include protective glass for protecting the photosensitive element located on the imaging surface.

[0081] In an exemplary embodiment, the effective focal length f of the eyepiece device 100 may be, for example, in the range of 28.26 mm to 31.87 mm, the effective focal length f1 of the first lens may be, for example, in the range of 76.81 mm to 130.95 mm, the effective focal length f2 of the second lens may be, for example, in the range of -255.80 mm to -75.59 mm, and the effective focal length f3 of the third lens may be, for example, in the range of 70.57 mm to 146.75 mm.

[0082] In an exemplary embodiment, the effective focal length fn of the positioning device 200 may be, for example, in the range of 0.60 mm to 0.87 mm, the effective focal length f1n of the first lens may be, for example, in the range of -3.70 mm to -3.23 mm, the effective focal length f2n of the second lens may be, for example, in the range of -2.12 mm to -1.82 mm, the effective focal length f3n of the third lens may be, for example, in the range of 1.19 mm to 3.29 mm, the effective focal length f4n of the fourth lens may be, for example, in the range of -1.12 mm to 1.21 mm, and the effective focal length f5n of the fifth lens may be, for example, in the range of -2.56 mm to 1.61 mm.

[0083] refer to Figure 1 A second aspect of this application provides a virtual reality module 10 that may include an eyepiece device 100 and a positioning device 200. In an exemplary embodiment, the positioning device 200 may include a first lens barrel, a lens group, and at least one spacer, wherein the lens group and one or more spacers are all housed within the lens barrel. The lens group may include five lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical path. These five lenses are arranged sequentially from the object side to the image side along a first optical axis. Any two adjacent lenses from the first lens to the fifth lens may have a spacing distance between them.

[0084] In an exemplary embodiment, the eyepiece device 100 may include an eyepiece device comprising a receiving part, an imaging part, and a transmitting part. The imaging part may include a second lens barrel, a reflecting assembly, a lens group, and at least one spacer. The lens group may include three lenses, namely a first lens, a second lens, and a third lens arranged sequentially from the first side to the second side along the second optical axis. The reflecting assembly, the lens group, and at least one spacer are all housed within the second lens barrel.

[0085] In an exemplary embodiment, the virtual reality module satisfies: -20 < |R6 d0m| / (R2 D1s) < -3.0, where R2 is the radius of curvature of the second side surface of the first lens, R6 is the radius of curvature of the second side surface of the third lens, d0m is the inner diameter of the rear end face of the second lens barrel closest to the second side, and D1s is the outer diameter of the side surface of the first spacer. By controlling the above parameters, the radii of curvature of the second side surfaces of the first and third lenses of the eyepiece device are constrained, which is beneficial for correcting system aberrations; at the same time, by controlling the inner diameter of the rear end face of the second lens barrel and the outer diameter of the side surface of the first spacer, the step difference between each component can be kept small, which is beneficial for ensuring assembly stability.

[0086] The following describes specific embodiments of a virtual reality module applicable to the above-described implementation methods with reference to the accompanying drawings.

[0087] Example 1

[0088] The following is for reference Figures 4 to 6 The eyepiece device according to Embodiment 1 of this application is described.

[0089] like Figure 4 As shown, the eyepiece device may include a receiving section J, an imaging section and an emitting section F arranged sequentially from a first side (e.g., the human eye side) to a second side (e.g., the display screen side).

[0090] Figure 6 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 1 of this application is shown. Figure 6 As shown, the imaging section of the eyepiece device includes a second lens barrel P0 and a reflective assembly, a lens group, and at least one isolator housed within the second lens barrel P0. The lens group includes a first lens E1, a second lens E2, and a third lens E3 sequentially arranged from a first side to a second side. The isolator includes a first isolator P1 located between the first lens E1 and the second lens E2 and directly contacting the second side surface S2 of the first lens E1, and a second isolator P2 located between the second lens E2 and the third lens E3 and directly contacting the second side surface S4 of the second lens E2. The reflective assembly may include a reflective polarizing element RP and a quarter-wave plate QWP located at the first side surface S1 of the first lens E1.

[0091] In this embodiment, the eyepiece device may further include an aperture disposed between the first side and the first lens E1.

[0092] In this embodiment, the eyepiece device may further include a partial reflective element BS, which may be disposed on the first side surface S3 of the second lens E2.

[0093] In an exemplary embodiment, an image surface may be provided on the second side of the eyepiece device. A display screen is provided on the image surface located on the second side of the eyepiece device. Light from the emitting part F of the eyepiece device is projected onto the display screen. The image light on the display screen can sequentially pass through the third lens E3, the second lens E2, and the first lens E1 to reach the reflective polarizing element RP. Then, it is reflected at the reflective polarizing element RP and passes through the quarter-wave plate QWP and the first lens E1 to reach the partial reflective element BS. After that, the light beam is reflected again at the partial reflective element BS and sequentially passes through the first lens E1, the quarter-wave plate QWP, and the reflective polarizing element RP to reach the receiving part J of the eyepiece device 100, so as to exit towards the human eye. The eyepiece device provided in this application folds the required optical path without affecting the projection quality by combining light reflection and refraction, effectively shortening the body length of the eyepiece device.

[0094] In this embodiment, the first lens E1 has positive optical power, and its second side surface S2 is convex. The second lens E2 has negative optical power, and its first side surface S3 and second side surface S4 are concave. The third lens E3 has positive optical power, and its first side surface S5 and second side surface S6 are convex. By controlling the surface shapes of the lens group near the human eye and near the display, it is beneficial to control the light emission angle and improve the field of view. On the other hand, by reasonably controlling the surface shape of the lens group, the light direction can be further optimized, which is beneficial to improving the system image quality and constraining the incident angle of edge light, which is beneficial to chip matching.

[0095] Example 2

[0096] The following is for reference Figure 4 , Figure 5 and Figure 7 The eyepiece device according to Embodiment 2 of this application is described. In this embodiment and the following Embodiment 3, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0097] Figure 7 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 2 of this application is shown. Figure 7 As shown, the imaging section of the eyepiece device includes a second lens barrel P0, a reflective assembly, a lens group, and at least one isolator housed within the second lens barrel P0. The lens group includes a first lens E1, a second lens E2, and a third lens E3 sequentially arranged from a first side to a second side. The isolator includes a first isolator P1 located between the first lens E1 and the second lens E2 and capable of directly contacting the second side surface of the first lens E1. The reflective assembly may include a reflective polarizing element RP and a quarter-wave plate QWP located at the first side surface S1 of the first lens E1.

[0098] In this embodiment, the eyepiece device may further include an aperture disposed between the first side and the first lens E1.

[0099] In this embodiment, the eyepiece device may further include a partial reflective element BS, which may be disposed on the first side surface S3 of the second lens E2.

[0100] In this embodiment, the first lens E1 has positive optical power, wherein the first side surface S1 of the first lens E1 is flat and the second side surface S2 is convex. The second lens E2 has negative optical power, wherein the first side surface S3 of the second lens E2 is concave and the second side surface S4 is concave. The third lens E3 has positive optical power, wherein the first side surface S5 of the third lens E3 is convex and the second side surface S6 is convex. By controlling the surface shape of the lens group near the human eye and near the display, it is beneficial to control the light emission angle and improve the field of view; on the other hand, by reasonably controlling the surface shape of the lens group, the light direction can be further optimized, which is beneficial to improving the image quality of the system and constraining the incident angle of edge light, which is beneficial to chip matching.

[0101] Example 3

[0102] The following is for reference Figure 4 , Figure 5 and Figure 8 The eyepiece device according to Embodiment 3 of this application is described.

[0103] Figure 8 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 3 of this application is shown. Figure 8 As shown, the imaging section of the eyepiece device includes a second lens barrel P0, a reflective assembly, a lens group, and at least one isolator housed within the second lens barrel P0. The lens group includes a first lens E1, a second lens E2, and a third lens E3 sequentially arranged from a first side to a second side. The isolator includes a first isolator P1 located between the first lens E1 and the second lens E2 and capable of direct contact with the second side surface of the first lens E1, and a second isolator P2 located between the second lens E2 and the third lens E3 and capable of direct contact with the second side surface of the second lens E2. The reflective assembly may include a reflective polarizing element RP and a quarter-wave plate QWP located at the first side surface S1 of the first lens E1.

[0104] In this embodiment, the eyepiece device may further include an aperture disposed between the first side and the first lens E1.

[0105] In this embodiment, the eyepiece device may further include a partial reflective element BS, which may be disposed on the first side surface S3 of the second lens E2.

[0106] In this embodiment, the first lens E1 has positive optical power, wherein the first side surface S1 of the first lens E1 is flat and the second side surface S2 is convex. The second lens E2 has negative optical power, wherein the first side surface S3 of the second lens E2 is concave and the second side surface S4 is concave. The third lens E3 has positive optical power, wherein the first side surface S5 of the third lens E3 is convex and the second side surface S6 is convex. By controlling the surface shape of the lens group near the human eye and near the display, it is beneficial to control the light emission angle and improve the field of view; on the other hand, by reasonably controlling the surface shape of the lens group, the light direction can be further optimized, which is beneficial to improving the image quality of the system and constraining the incident angle of edge light, which is beneficial to chip matching.

[0107] Table 1 below shows the basic parameters of the eyepiece device according to Embodiments 1 to 3 of this application, wherein the units of radius of curvature and thickness / distance are millimeters (mm). The image light from the emitting part passes through each element in sequence and is finally projected onto the human eye located in the receiving part.

[0108]

[0109] Table 1

[0110] In Examples 1 to 3, the second side surface S2 of the first lens E1, the first side surface S3 and the second side surface S4 of the second lens E2, and the first side surface S5 and the second side surface S6 of the third lens E3 are all aspherical surfaces, and the surface shape of each aspherical lens is... The following aspherical formulas can be used for limitation:

[0111] (1)

[0112] in, For an aspherical surface along the optical axis at a height of h When the position is such that the distance from the vertex of the non-spherical surface is the sag; c For the paraxial curvature of an aspherical surface, c =1 / R (i.e., paraxial curvature) c (The reciprocal of the radius of curvature R in Table 1 above). k The conic coefficient; Ai Is it an aspherical first i -th order correction coefficients. Table 2 shows the higher-order coefficients of S2, S3, S4, S5, and S6 for each aspherical mirror in Examples 1 to 3. A 4 , A 6 , A 8 and A 10 .

[0113]

[0114] Table 2

[0115] Figure 9A The on-axis chromatic aberration curves of the eyepiece devices of Embodiments 1 to 3 above are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the eyepiece device. Figure 9B The astigmatism curves of the eyepiece devices of Embodiments 1 to 3 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different field of view angles. Figure 9C The distortion curves of the eyepiece devices in Embodiments 1 to 3 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. According to... Figures 9A to 9C It can be seen that the eyepiece devices given in Examples 1 to 3 can achieve good imaging quality.

[0116] Example 4

[0117] The following is for reference Figure 4 , Figure 5 and Figure 10 The eyepiece device according to Embodiment 4 of this application is described.

[0118] like Figure 4 As shown, the eyepiece device may include a receiving section J, an imaging section and an emitting section F arranged sequentially from a first side (e.g., the human eye side) to a second side (e.g., the display screen side).

[0119] Figure 10 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 4 of this application is shown. Figure 10 As shown, the imaging section of the eyepiece device includes a second lens barrel P0 and a reflective assembly, a lens group, and at least one isolator housed within the second lens barrel P0. The lens group includes a first lens E1, a second lens E2, and a third lens E3 sequentially arranged from a first side to a second side. The isolator includes a first isolator P1 located between the first lens E1 and the second lens E2 and directly contacting the second side surface S2 of the first lens E1, and a second isolator P2 located between the second lens E2 and the third lens E3 and directly contacting the second side surface S4 of the second lens E2. The reflective assembly may include a reflective polarizing element RP and a quarter-wave plate QWP located at the first side surface S3 of the second lens E2.

[0120] In this embodiment, the eyepiece device may further include an aperture disposed between the first side and the first lens E1.

[0121] In this embodiment, the eyepiece device may further include a partial reflective element BS, which may be disposed on the second side surface S6 of the third lens E3.

[0122] An image surface may be provided on the second side of the eyepiece device. In an exemplary embodiment, a display screen is provided on the image surface located on the second side of the eyepiece device. The light emitted by the emitting part F of the eyepiece device is projected onto the display screen. The image light on the display screen can sequentially pass through the third lens E3 and the second lens E2 to reach the reflective polarizing element RP. Then, it is reflected at the reflective polarizing element RP and passes through the quarter-wave plate QWP and the third lens E3 to reach the partial reflective element BS. After that, the light beam is reflected again at the partial reflective element BS and sequentially passes through the third lens E3, the second lens E2, the quarter-wave plate QWP, the reflective polarizing element RP, and the first lens E1 to reach the receiving part J of the eyepiece device 100, so as to exit towards the human eye. The eyepiece device provided in this application folds the required optical path without affecting the projection quality by combining light reflection and refraction, effectively shortening the body length of the eyepiece device.

[0123] In this embodiment, the first lens E1 has positive optical power, wherein the first side surface S1 of the first lens E1 is concave and the second side surface S2 is convex. The second lens E2 has negative optical power, wherein the first side surface S3 of the second lens E2 is planar and the second side surface S4 is concave. The third lens E3 has positive optical power, wherein the first side surface S5 of the third lens E3 is convex and the second side surface S6 is convex. By controlling the surface shape of the lens group near the human eye and near the display, it is beneficial to control the light emission angle and improve the field of view; on the other hand, by reasonably controlling the surface shape of the lens group, the light direction can be further optimized, which is beneficial to improving the image quality of the system and constraining the incident angle of edge light, which is beneficial to chip matching.

[0124] Example 5

[0125] The following is for reference Figure 4 , Figure 5 and Figure 11 The eyepiece device according to Embodiment 5 of this application is described. In this embodiment and the following Embodiment 6, for the sake of brevity, descriptions similar to those in Embodiment 4 will be omitted.

[0126] Figure 11 A schematic diagram of the imaging section of the eyepiece device according to Embodiment 5 of this application is shown. Figure 11As shown, the imaging section of the eyepiece device includes a second lens barrel P0, a reflective assembly, a lens group, and at least one isolator housed within the second lens barrel P0. The lens group includes a first lens E1, a second lens E2, and a third lens E3 sequentially arranged from a first side to a second side. The isolator includes a second isolator P2 located between the second lens E2 and the third lens E3 and capable of direct contact with the second side surface S4 of the second lens E2. The reflective assembly may include a reflective polarizing element RP and a quarter-wave plate QWP located at the first side surface S3 of the second lens E2.

[0127] In this embodiment, the eyepiece device may further include an aperture disposed between the first side and the first lens E1.

[0128] In this embodiment, the eyepiece device may further include a partial reflective element BS, which may be disposed on the second side surface S6 of the third lens E3.

[0129] In this embodiment, the first lens E1 has positive optical power, wherein the first side surface S1 of the first lens E1 is concave and the second side surface S2 is convex. The second lens E2 has negative optical power, wherein the first side surface S3 of the second lens E2 is planar and the second side surface S4 is concave. The third lens E3 has positive optical power, wherein the first side surface S5 of the third lens E3 is convex and the second side surface S6 is convex. By controlling the surface shape of the lens group near the human eye and near the display, it is beneficial to control the light emission angle and improve the field of view; on the other hand, by reasonably controlling the surface shape of the lens group, the light direction can be further optimized, which is beneficial to improving the image quality of the system and constraining the incident angle of edge light, which is beneficial to chip matching.

[0130] Example 6

[0131] The following is for reference Figure 4 , Figure 5 and Figure 12 The eyepiece device according to Embodiment Six of this application is described.

[0132] Figure 12 A schematic diagram of the imaging section of the eyepiece device according to Embodiment Six of this application is shown. Figure 12As shown, the imaging section of the eyepiece device includes a second lens barrel P0 and a reflective assembly, a lens group, and at least one isolator housed within the second lens barrel P0. The lens group includes a first lens E1, a second lens E2, and a third lens E3 sequentially arranged from a first side to a second side. The isolator includes a first isolator P1 located between the first lens E1 and the second lens E2 and directly contacting the second side surface S2 of the first lens E1, and a second isolator P2 located between the second lens E2 and the third lens E3 and directly contacting the second side surface S4 of the second lens E2. The reflective assembly may include a reflective polarizing element RP and a quarter-wave plate QWP located at the first side surface S3 of the second lens E2.

[0133] In this embodiment, the eyepiece device may further include an aperture disposed between the first side and the first lens E1.

[0134] In this embodiment, the eyepiece device may further include a partial reflective element BS, which may be disposed on the second side surface S6 of the third lens E3.

[0135] In this embodiment, the first lens E1 has positive optical power, wherein the first side surface S1 of the first lens E1 is flat and the second side surface S2 is convex. The second lens E2 has negative optical power, wherein the first side surface S3 of the second lens E2 is concave and the second side surface S4 is concave. The third lens E3 has positive optical power, wherein the first side surface S5 of the third lens E3 is convex and the second side surface S6 is convex. By controlling the surface shape of the lens group near the human eye and near the display, it is beneficial to control the light emission angle and improve the field of view; on the other hand, by reasonably controlling the surface shape of the lens group, the light direction can be further optimized, which is beneficial to improving the image quality of the system and constraining the incident angle of edge light, which is beneficial to chip matching.

[0136] Table 3 below shows the basic parameters of the eyepiece device according to Embodiments 4 to 6 of this application, wherein the units of radius of curvature and thickness / distance are millimeters (mm). The image light from the emitting part passes through each element in sequence and is finally projected onto the human eye located in the receiving part.

[0137]

[0138] Table 3

[0139] In Examples 4 to 6, the first side surface S1 and the second side surface S2 of the first lens E1, the second side surface S4 of the second lens E2, and the first side surface S5 and the second side surface S6 of the third lens E3 are all aspherical surfaces, and the surface shape of each aspherical lens is... The formula (1) given in Example 1 above can be used for limitation.

[0140] Table 4 lists the higher-order coefficients of the aspherical mirrors S1, S2, S4, S5, and S6 that can be used in Examples 4 to 6. A 4 , A 6 , A 8 and A 10 .

[0141]

[0142] Table 4

[0143] Figure 13A The on-axis chromatic aberration curves of the eyepiece devices of Embodiments 4 to 6 above are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the eyepiece device. Figure 13B Astigmatism curves of the eyepiece devices of Embodiments 4 to 6 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different field of view angles. Figure 13C The distortion curves of the eyepiece devices in Examples 4 to 6 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. According to... Figures 13A to 13C It can be seen that the eyepiece devices given in Examples 4 to 6 can achieve good imaging quality.

[0144] Table 5 below shows the basic parameters of the eyepiece device according to Embodiments 1 to 6 of this application, wherein the units of thickness / distance and focal length are millimeters (mm).

[0145]

[0146] Table 5

[0147] The positioning device according to embodiments of this application is further described below with reference to the accompanying drawings.

[0148] Example 7

[0149] Figure 14 A schematic diagram of the positioning device according to Embodiment Seven of this application is shown. Figure 14 As shown, the positioning device may include a first lens barrel P0n, a lens assembly and at least one spacer housed within the first lens barrel P0n.

[0150] In this embodiment, the lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The spacers may include a first spacer P1n located between the first lens E1n and the second lens E2n and in direct contact with the image side of the first lens E1n; a second spacer P2n located between the second lens E2n and the third lens E3n and in direct contact with the image side of the second lens E2n; a third spacer P3n located between the third lens E3n and the fourth lens E4n and in direct contact with the image side of the third lens E3n; and a fourth spacer P4n located between the fourth lens E4n and the fifth lens E5n and in direct contact with the image side of the fourth lens E4n.

[0151] In this embodiment, the positioning device may further include an aperture disposed between the second lens E2n and the third lens E3n, and a filter E6n disposed between the image side surface S10n and the imaging surface S13n of the fifth lens E5n.

[0152] In this embodiment, the first lens E1n has negative optical power, with its object-side surface S1n being convex and its image-side surface S2n being concave. The second lens E2n has negative optical power, with its object-side surface S3n being convex and its image-side surface S4n being concave. The third lens E3n has positive optical power, with its object-side surface S5n being convex and its image-side surface S6n being convex. The fourth lens E4n has negative optical power, with its object-side surface S7n being concave and its image-side surface S8n being concave. The fifth lens E5n has positive optical power, with its object-side surface S9n being convex and its image-side surface S10n being convex. The filter E6n has an object-side surface S11n and an image-side surface S12n. Light from the object passes through each surface sequentially from the object side to the image side and is finally imaged on the imaging surface S13n.

[0153] Example 8

[0154] Figure 15 A schematic diagram of the positioning device according to Embodiment 8 of this application is shown. For the sake of brevity, descriptions similar to those in Embodiment 7 will be omitted in this embodiment and the following Embodiment 9.

[0155] like Figure 15 As shown, the positioning device may include a first lens barrel P0n, a lens assembly and at least one spacer housed within the first lens barrel P0n.

[0156] In this embodiment, the lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The spacers may include a first spacer P1n located between the first lens E1n and the second lens E2n and in direct contact with the image side of the first lens E1n; a second spacer P2n located between the second lens E2n and the third lens E3n and in direct contact with the image side of the second lens E2n; a third spacer P3n located between the third lens E3n and the fourth lens E4n and in direct contact with the image side of the third lens E3n; and a fourth spacer P4n located between the fourth lens E4n and the fifth lens E5n and in direct contact with the image side of the fourth lens E4n.

[0157] In this embodiment, the positioning device may further include an aperture disposed between the second lens E2n and the third lens E3n, and an E6n disposed between the image side surface S10n and the imaging surface S13n of the fifth lens E5n.

[0158] In this embodiment, the first lens E1n has negative optical power, with its object-side surface S1n being convex and its image-side surface S2n being concave. The second lens E2n has negative optical power, with its object-side surface S3n being convex and its image-side surface S4n being concave. The third lens E3n has positive optical power, with its object-side surface S5n being convex and its image-side surface S6n being convex. The fourth lens E4n has negative optical power, with its object-side surface S7n being concave and its image-side surface S8n being concave. The fifth lens E5n has positive optical power, with its object-side surface S9n being convex and its image-side surface S10n being convex. The filter E6n has an object-side surface S11n and an image-side surface S12n. Light from the object passes through each surface sequentially from the object side to the image side and is finally imaged on the imaging surface S13n.

[0159] Example 9

[0160] Figure 16 A schematic diagram of the positioning device according to Embodiment 9 of this application is shown.

[0161] like Figure 16 As shown, the positioning device may include a first lens barrel P0n, a lens assembly and at least one spacer housed within the first lens barrel P0n.

[0162] In this embodiment, the lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The spacers may include a first spacer P1n located between the first lens E1n and the second lens E2n and in direct contact with the image side of the first lens E1n; a second spacer P2n located between the second lens E2n and the third lens E3n and in direct contact with the image side of the second lens E2n; a third spacer P3n located between the third lens E3n and the fourth lens E4n and in direct contact with the image side of the third lens E3n; and a fourth spacer P4n located between the fourth lens E4n and the fifth lens E5n and in direct contact with the image side of the fourth lens E4n.

[0163] In this embodiment, the positioning device may further include an aperture disposed between the second lens E2n and the third lens E3n, and a filter E6n disposed between the image side surface S10n and the imaging surface S13n of the fifth lens E5n.

[0164] In this embodiment, the first lens E1n has negative optical power, with its object-side surface S1n being convex and its image-side surface S2n being concave. The second lens E2n has negative optical power, with its object-side surface S3n being convex and its image-side surface S4n being concave. The third lens E3n has positive optical power, with its object-side surface S5n being convex and its image-side surface S6n being convex. The fourth lens E4n has negative optical power, with its object-side surface S7n being concave and its image-side surface S8n being concave. The fifth lens E5n has positive optical power, with its object-side surface S9n being convex and its image-side surface S10n being convex. The filter E6n has an object-side surface S11n and an image-side surface S12n. Light from the object passes through each surface sequentially from the object side to the image side and is finally imaged on the imaging surface S13n.

[0165] Table 6 shows the basic parameters of the positioning devices of Embodiments 7 to 9 of this application, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0166]

[0167] Table 6

[0168] In embodiments seven to nine, the object-side surface S3n and image-side surface S4n of the second lens E2n, the object-side surface S5n and image-side surface S6n of the third lens E3n, the object-side surface S7n and image-side surface S8n of the fourth lens E4n, and the object-side surface S9n and image-side surface S10n of the fifth lens E5n are all aspherical, and the surface shape of each aspherical lens is... The formula (1) given in Example 1 above can be used for limitation.

[0169] Table 7 lists the higher-order coefficients of the aspherical mirrors S3n, S4n, S5n, S6n, S7n, S8n, S9n, and S10n that can be used in the positioning devices of Embodiments 7 to 9. A 4 , A 6 , A 8 , A 10 , A 12 and A 14 and A 16 .

[0170]

[0171] Table 7

[0172] Figure 17A The on-axis chromatic aberration curves of the positioning devices of Embodiments 7 to 9 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the positioning device. Figure 17B Astigmatism curves of the positioning devices of Embodiments 7 to 9 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 17C The distortion curves of the positioning devices in Embodiments 7 to 9 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 17A to 17C It can be seen that the positioning devices given in Examples 7 to 9 can achieve good imaging quality.

[0173] Example 10

[0174] Figure 18 A schematic diagram of the positioning device according to Embodiment 10 of this application is shown. Figure 18 As shown, the positioning device may include a first lens barrel P0n, a lens assembly and at least one spacer housed within the first lens barrel P0n.

[0175] In this embodiment, the lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The spacer may include a first spacer P1n located between the first lens E1n and the second lens E2n and in direct contact with the image side of the first lens E1n; a second spacer P2n located between the second lens E2n and the third lens E3n and in direct contact with the image side of the second lens E2n; and a third spacer P3n located between the third lens E3n and the fourth lens E4n and in direct contact with the image side of the third lens E3n.

[0176] In this embodiment, the positioning device may further include an aperture disposed between the third lens E3n and the fourth lens E4n, and a filter E6n disposed between the image side surface S10n and the imaging surface S13n of the fifth lens E5n.

[0177] In this embodiment, the first lens E1n has negative optical power, with its object-side surface S1n being convex and its image-side surface S2n being concave. The second lens E2n has negative optical power, with its object-side surface S3n being concave and its image-side surface S4n being concave. The third lens E3n has positive optical power, with its object-side surface S5n being convex and its image-side surface S6n being concave. The fourth lens E4n has positive optical power, with its object-side surface S7n being convex and its image-side surface S8n being convex. The fifth lens E5n has positive optical power, with its object-side surface S9n being concave and its image-side surface S10n being convex. The filter E6n has an object-side surface S11n and an image-side surface S12n. Light from the object passes through each surface sequentially from the object side to the image side and is finally imaged on the imaging surface S13n.

[0178] Example 11

[0179] Figure 19 A schematic diagram of the positioning device according to Embodiment Eleven of this application is shown. For the sake of brevity, in this embodiment and the following Embodiment Twelve, descriptions similar to those in Embodiment Seven will be omitted.

[0180] like Figure 19 As shown, the positioning device may include a first lens barrel P0n, a lens assembly and at least one spacer housed within the first lens barrel P0n.

[0181] In this embodiment, the lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The spacer may include a first spacer P1n located between the first lens E1n and the second lens E2n and in direct contact with the image side of the first lens E1n; a second spacer P2n located between the second lens E2n and the third lens E3n and in direct contact with the image side of the second lens E2n; and a third spacer P3n located between the third lens E3n and the fourth lens E4n and in direct contact with the image side of the third lens E3n.

[0182] In this embodiment, the positioning device may further include an aperture disposed between the third lens E3n and the fourth lens E4n, and a filter E6n disposed between the image side surface S10n and the imaging surface S13n of the fifth lens E5n.

[0183] In this embodiment, the first lens E1n has negative optical power, with its object-side surface S1n being convex and its image-side surface S2n being concave. The second lens E2n has negative optical power, with its object-side surface S3n being concave and its image-side surface S4n being concave. The third lens E3n has positive optical power, with its object-side surface S5n being convex and its image-side surface S6n being concave. The fourth lens E4n has positive optical power, with its object-side surface S7n being convex and its image-side surface S8n being convex. The fifth lens E5n has positive optical power, with its object-side surface S9n being concave and its image-side surface S10n being convex. The filter E6n has an object-side surface S11n and an image-side surface S12n. Light from the object passes through each surface sequentially from the object side to the image side and is finally imaged on the imaging surface S13n.

[0184] Example 12

[0185] Figure 20 A schematic diagram of the positioning device according to Embodiment Twelve of this application is shown.

[0186] like Figure 20 As shown, the positioning device may include a first lens barrel P0n, a lens assembly and at least one spacer housed within the first lens barrel P0n.

[0187] In this embodiment, the lens group may include a first lens E1n, a second lens E2n, a third lens E3n, a fourth lens E4n, and a fifth lens E5n arranged sequentially from the object side to the image side along a first optical axis. The spacer may include a first spacer P1n located between the first lens E1n and the second lens E2n and in direct contact with the image side of the first lens E1n; a second spacer P2n located between the second lens E2n and the third lens E3n and in direct contact with the image side of the second lens E2n; and a third spacer P3n located between the third lens E3n and the fourth lens E4n and in direct contact with the image side of the third lens E3n.

[0188] In this embodiment, the positioning device may further include an aperture disposed between the third lens E3n and the fourth lens E4n, and a filter E6n disposed between the image side surface S10n and the imaging surface S13n of the fifth lens E5n.

[0189] In embodiments ten to twelve above, the fourth lens E4n and the fifth lens E5n can be cemented lenses, meaning the image-side surface S8n of the fourth lens E4n can coincide with the object-side surface S9n of the fifth lens E5n. The first lens E1n has negative optical power, its object-side surface S1n is convex, and its image-side surface S2n is concave. The second lens E2n has negative optical power, its object-side surface S3n is concave, and its image-side surface S4n is concave. The third lens E3n has positive optical power, its object-side surface S5n is convex, and its image-side surface S6n is concave. The cemented lens composed of the fourth lens E4n and the fifth lens E5n can have either positive or negative optical power, its object-side surface S7n is convex, and its image-side surface S10n is convex. The filter E6n has an object-side surface S11n and an image-side surface S12n. Light from the object passes through each surface sequentially from the object side to the image side and is finally imaged on the imaging surface S13n.

[0190] Table 8 shows the basic parameters of the positioning devices of Embodiments 10 to 12 of this application, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0191]

[0192] Table 8

[0193] In Examples 10 to 12, the object-side surface S3n and image-side surface S4n of the second lens E2n, the object-side surface S5n and image-side surface S6n of the third lens E3n, the object-side surface S7n and image-side surface S8n of the fourth lens E4n, and the object-side surface S9n and image-side surface S10n of the fifth lens E5n are all aspherical, and the surface shape of each aspherical lens is... The formula (1) given in Example 1 above can be used for limitation.

[0194] Table 9 lists the higher-order coefficients of the aspherical mirrors S3n, S4n, S5n, S6n, S7n, S8n, S9n, and S10n that can be used in the positioning devices of Examples 10 to 12. A 4 , A 6 , A 8 , A 10 , A 12 and A 14 and A 16 .

[0195]

[0196] Table 9

[0197] Figure 21A The on-axis chromatic aberration curves of the positioning devices of Embodiments 10 to 12 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the positioning device. Figure 21B The astigmatic curves of the positioning devices of Embodiments 10 to 12 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 21C The distortion curves of the positioning devices in Embodiments 10 to 12 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 21A to 21C It can be seen that the positioning devices given in Examples 10 to 12 can achieve good imaging quality.

[0198] Table 10 below shows the basic parameters of the positioning device according to Embodiments 7 to 12 of this application, wherein the units of thickness / distance and focal length are millimeters (mm).

[0199]

[0200] Table 10

[0201] refer to Figure 1 The virtual reality module 10 provided in this application can be composed of the eyepiece device and the positioning device in any of the above embodiments. The eyepiece device and the positioning device can be combined in pairs to form 36 different virtual reality modules, meaning there are 36 examples of virtual reality modules. Specifically, the virtual reality module corresponding to Example 1 is composed of the eyepiece device of Example 1 and the positioning device of Example 7; the virtual reality module corresponding to Example 2 is composed of the eyepiece device of Example 1 and the positioning device of Example 8; the virtual reality module corresponding to Example 3 is composed of the eyepiece device of Example 1 and the positioning device of Example 9; the virtual reality module corresponding to Example 4 is composed of the eyepiece device of Example 1 and the positioning device of Example 10; the virtual reality module corresponding to Example 5 is composed of the eyepiece device of Example 1 and the positioning device of Example 11; and the virtual reality module corresponding to Example 6 is composed of the eyepiece device of Example 1 and the positioning device of Example 12. The virtual reality module corresponding to Example 7 consists of the eyepiece device of Example 2 and the positioning device of Example 7; the virtual reality module corresponding to Example 8 consists of the eyepiece device of Example 2 and the positioning device of Example 8; the virtual reality module corresponding to Example 9 consists of the eyepiece device of Example 2 and the positioning device of Example 9; the virtual reality module corresponding to Example 10 consists of the eyepiece device of Example 2 and the positioning device of Example 10; the virtual reality module corresponding to Example 11 consists of the eyepiece device of Example 2 and the positioning device of Example 11; the virtual reality module corresponding to Example 12 consists of the eyepiece device of Example 2 and the positioning device of Example 12, and so on.

[0202] In summary, the virtual reality modules according to Examples 1 to 36 of this application respectively satisfy the conditional expressions shown in Table 11 below.

[0203]

[0204] Table 11

[0205] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A virtual reality module, characterized in that, Includes a positioning device and an eyepiece device, wherein, The positioning device includes a first lens barrel, a lens group housed within the first lens barrel, and at least one spacer. The lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from the object side to the image side along a first optical axis. The at least one spacer includes a first spacer located between the first lens and the second lens, and a fourth spacer located between the fourth lens and the fifth lens. The eyepiece device includes an imaging unit, which includes a second lens barrel and a reflective assembly, at least one isolator, and a first lens, a second lens, and a third lens arranged sequentially from a first side to a second side along a second optical axis. The eyepiece device also includes a partial reflective element. The at least one isolator includes a first isolator located between the first lens and the second lens. The reflective assembly includes a reflective polarizing element and a quarter-wave plate. The reflective polarizing element and the quarter-wave plate are located on a first side of the first lens, and the partial reflective element is disposed on a first side of the second lens; or, the reflective polarizing element and the quarter-wave plate are located on a first side of the second lens, and the partial reflective element is disposed on a second side of the third lens. The number of lenses with optical power in the lens group is five; The first lens has negative optical power, and its object side is convex while its image side is concave. The second lens has negative optical power, and its image-side surface is concave. The third lens has positive optical power and its object side is convex. The fifth lens has positive optical power and its image-side surface is convex. The imaging unit contains three lenses with optical power. The first lens has positive optical power, and its second side surface is convex. The second lens has negative optical power, and its second side surface is concave. The third lens has positive optical power, and its first side surface is convex, and its second side surface is convex; and The following conditions must be met: half of the maximum field of view (Semi-FOVn) of the positioning device, half of the maximum field of view (Semi-FOV) of the eyepiece device, the inner diameter d0sn of the first lens barrel front face closest to the object side, the inner diameter d1sn of the object side of the first spacer, the inner diameter d1s of the first side of the first spacer, and the inner diameter d0s of the second lens barrel front face closest to the first side: 0.88 ≤ Tan(Semi-FOVn). (d0sn-d1sn) / |Tan(Semi-FOV) (d1s-d0s)|≤6.73; The combined focal length f45n of the fourth and fifth lenses, the center thickness CT4n of the fourth lens on the first optical axis, the center thickness CT5n of the fifth lens on the first optical axis, the outer diameter D4sn of the side surface of the fourth spacer, the inner diameter d4sn of the side surface of the fourth spacer, and the maximum thickness CP4n of the fourth spacer satisfy: -86.90≤f45n / (D4sn-d4sn)+f45n / (CT4n+CT5n+CP4n)≤-81.85; The effective focal length f of the eyepiece device, the center thickness dQWP of the quarter-wave plate on the second optical axis, the center thickness dRP of the reflective polarizing element on the second optical axis, the maximum thickness CP1 of the first isolator, and the distance EP01 between the front end face of the second lens barrel and the first isolator satisfy: 1.45≤f / (dRP+dQWP+CP1+EP01)≤2.

62.

2. The virtual reality module according to claim 1, wherein, The effective focal length f of the eyepiece device, the maximum height L of the second lens tube, the effective focal length fn of the positioning device, and the maximum height Ln of the first lens tube satisfy: 0.9≤f / L+fn / Ln≤1.

31.

3. The virtual reality module according to claim 1, wherein, The inner diameter d0s of the second lens barrel's front end face closest to the first side, the effective focal length f1 of the first lens, the distance EP01 between the second lens barrel's front end face and the first spacer, and the radius of curvature R2 of the second side surface of the first lens satisfy: -23.77 ≤ d0s (f1 / EP01) / R2≤-7.

02.

4. The virtual reality module according to claim 1, wherein, The radius of curvature R2 of the second side surface of the first lens, the radius of curvature R6 of the second side surface of the third lens, the inner diameter d0m of the rear end face of the second lens barrel closest to the second side, and the outer diameter D1s of the first side surface of the first insulating member satisfy: -19.59≤|R6 d0m| / (R2 D1s)≤-3.

52.

5. The virtual reality module according to claim 1, wherein, The radius of curvature R1n of the object-side surface of the first lens, the outer diameter D0sn of the front end face of the first lens barrel closest to the object side, the inner diameter d0sn of the front end face of the first lens barrel closest to the object side, the effective focal length f1n of the first lens, and the refractive index N1n of the first lens satisfy: -1.28≤R1n (D0sn / d0sn) / (f1n N1n)≤-0.

89.

6. The virtual reality module according to claim 1, wherein, The at least one spacer further includes a second spacer located between the second lens and the third lens. The effective focal length f1n of the first lens, the effective focal length f2n of the second lens, the outer diameter D1mn of the image-side surface of the first spacer, the inner diameter d1mn of the image-side surface of the first spacer, and the spacing EP12n between the first spacer and the second spacer satisfy: -3.70 mm ≤ f1n ≤ -3.23 mm, -2.12 mm ≤ f2n ≤ -1.82 mm, 1.94 ≤ (f2n) EP12n) / f1n (D1mn-d1mn)≤3.

05.

7. The virtual reality module according to claim 1, wherein, The at least one spacer further includes a second spacer located between the second lens and the third lens. The radius of curvature R1n of the object side of the first lens, the radius of curvature R2n of the image side of the first lens, the outer diameter D1sn of the object side of the first spacer, and the inner diameter d2sn of the object side of the second spacer satisfy: 7.21 ≤ R1n D1sn / (R2n d2sn)≤11.

20.

8. The virtual reality module according to claim 1, wherein, The at least one spacer further includes a second spacer located between the second lens and the third lens, and a third spacer located between the third lens and the fourth lens. The spacing EP23n between the second spacer and the third spacer, and the air spacing T23n between the second lens and the third lens on the first optical axis, satisfy: 0.33≤EP23n / T23n≤1.

14.

9. The virtual reality module according to any one of claims 1-7, wherein, The at least one spacer also includes a third spacer located between the third lens and the fourth lens. The radius of curvature R6n of the image side of the third lens, the radius of curvature R7n of the object side of the fourth lens, the outer diameter D3mn of the image side of the third spacer, and the inner diameter d3mn of the image side of the third spacer satisfy: 3.66≤|R6n+R7n| / D3mn+|R6n-R7n| / d3mn≤8.

45.

10. The virtual reality module according to any one of claims 1-8, wherein, The at least one spacer also includes a fourth spacer located between the fourth lens and the fifth lens. The effective focal length f5n of the fifth lens, the radius of curvature R10n of the image-side surface of the fifth lens, the inner diameter d0mn of the rear end face of the first lens barrel closest to the imaging plane, and the outer diameter D4mn of the image-side surface of the fourth spacer satisfy: -2.76≤f5n D4mn / R10n d0mn≤-2.

56.

11. The virtual reality module according to any one of claims 1-7, wherein, The at least one spacer further includes a third spacer located between the third lens and the fourth lens, and a fourth spacer located between the fourth lens and the fifth lens. The maximum thickness CP4n of the fourth spacer, the spacing EP34n between the third spacer and the fourth spacer, the air spacing T45n between the fourth lens and the fifth lens on the first optical axis, and the center thickness CT3n of the third lens on the first optical axis satisfy: 4.78≤EP34n / CT3n+T45n / CP4n≤5.44.

Images