Visual device

Abstract

The utility model provides a visual device. The visual device includes a device body; a first optical system, which is installed on the device body, and the first optical system includes a first element group, a second element group, a third element group and a fourth element group in sequence along the first optical axis direction from the near eye side to the far eye side; and a second optical system, which is installed on the device body; the first optical system satisfies the relationship: 0<FG12e / |FG3e|<0.2; wherein FG12e is the combined focal length of the first element group and the second element group, and FG3e is the effective focal length of the third element group. The first optical system of the visual device can optimize the imaging quality of the optical system, reduce the influence of aberration and distortion, improve the clarity and accuracy of the image, reduce the reflection loss of light, and improve the transmittance of light.

Description

Technical Field

[0001] The utility model relates to the technical field of optical elements, in particular to a visual device. Background Art

[0002] With the development of modern science and technology, a visual device that combines an eyepiece and a positioning lens has emerged. The visual device captures the user's movements through a positioning system, and works with the visual system to achieve interaction between the real world and the virtual world. It has accurate positioning and orientation functions to meet the needs of users and is widely used in military, medical, aerospace and other fields. The visual device converts the image light reflected by the target object into polarized light through a polarizing element, and then refracts and focuses through a lens to form a clear image.

[0003] Currently available visual devices usually place polarizing elements directly in front of the lens, and the lens used to refract and focus polarized light is usually a low-refractive-index lens, resulting in low image clarity, poor focusing ability, and poor imaging quality in the existing visual devices. Utility Model Content

[0004] Based on this, it is necessary to provide a visual device to address the problems of low image clarity, poor focusing ability and poor imaging quality existing in existing visual devices.

[0005] A visual device, comprising:

[0006] Device body;

[0007] a first optical system, the first optical system is installed in the device body, the first optical system includes a first element group, a second element group, a third element group and a fourth element group in sequence along the first optical axis from the near eye side to the far eye side; the first element group includes a first lens, a reflective polarizing element and a first quarter wave plate arranged in sequence along the first optical axis; the second element group includes a second lens; the third element group includes a second quarter wave plate, a polarizing film and a third lens arranged in sequence along the first optical axis; the fourth element group includes a fourth lens; and

[0008] a second optical system, the second optical system being mounted on the device body, the second optical system including, from the object side to the image side along the second optical axis, a first lens having negative optical power, a second lens having negative optical power, a third lens having positive optical power, a fourth lens having positive optical power, a fifth lens having negative optical power, and a sixth lens having positive optical power;

[0009] The first optical system satisfies the following relationship:

[0010] 0<FG12e / |FG3e|<0.2;

[0011] The visual device satisfies the following relationship:

[0012] 0<[TDe*TAN(Semi-FOVe)] / [TDp*TAN(Semi-FOVp)]≤2.5;

[0013] 1.3≤TDe / Fe≤1.7;

[0014] 4.5≤TDp / Fp<6.5;

[0015] Among them, FG12e is the combined focal length of the first element group and the second element group, FG3e is the effective focal length of the third element group, TDe is the distance from the near eye side of the first lens to the far eye side of the fourth lens on the first optical axis, Semi-FOVe is the maximum half field of view angle of the first optical system, Fe is the effective focal length of the first optical system, TDp is the distance from the object side of the first lens to the image side of the sixth lens on the second optical axis, Semi-FOVp is the maximum half field of view angle of the second optical system, and Fp is the effective focal length of the second optical system.

[0016] In one embodiment, the second lens has a partially reflective film on the far eye side.

[0017] In one embodiment, the first optical system further includes a first aperture stop, and the first aperture stop is disposed on the near-eye side of the first lens.

[0018] In one embodiment, the first optical system satisfies the following relationship:

[0019] 1.5≤DT1emax / SL1e≤2.0;

[0020] Wherein, DT1emax is the maximum diameter of the first lens, and SL1e is the distance from the first aperture to the first lens on the first optical axis in the first optical system.

[0021] In one embodiment, the first optical system satisfies the following relationship:

[0022] 1.5<SDe / DTemax<2.0;

[0023] Wherein, SDe is the distance from the first aperture to the fourth lens on the first optical axis in the first optical system, and DTemax is the maximum diameter of the first element group, the second element group, the third element group and the fourth element group.

[0024] In one embodiment, the first optical system satisfies the following relationship:

[0025] 0<Fe / |FG1e|<0.3;

[0026] Among them, Fe is the effective focal length of the first optical system, and FG1e is the effective focal length of the first element group.

[0027] In one embodiment, the first optical system satisfies the following relationship:

[0028] 0<Fe / |f4e|<0.5;

[0029] Among them, Fe is the effective focal length of the first optical system, and f4e is the effective focal length of the fourth lens.

[0030] In one embodiment, the first optical system satisfies the following relationship:

[0031] 6.0<f2e / (N2e*CT2e)<12;

[0032] Among them, f2e is the effective focal length of the second lens, N2e is the refractive index of the second lens, and CT2e is the center thickness of the second lens.

[0033] In one embodiment, the first optical system satisfies the following relationship:

[0034] -1.0<f2e / R3e+f2e / R4e<0;

[0035] Among them, f2e is the effective focal length of the second lens, R3e is the curvature radius of the near eye side of the second lens, and R4e is the curvature radius of the far eye side of the second lens.

[0036] In one embodiment, the first optical system satisfies the following relationship:

[0037] 2.0≤|f3e / R6e|+|f4e / R7e|≤5.0;

[0038] Among them, f3e is the effective focal length of the third lens, R6e is the curvature radius of the far eye side of the third lens, f4e is the effective focal length of the fourth lens, and R7e is the curvature radius of the near eye side of the fourth lens.

[0039] In one embodiment, the visual device satisfies the following relationship:

[0040] 2.0<[Fe*TAN(Semi-FOVe)] / [Fp*TAN(Semi-FOVp)]<9.0;

[0041] Among them, Fe is the effective focal length of the first optical system, Semi-FOVe is the maximum half field of view angle of the first optical system, Fp is the effective focal length of the second optical system, and Semi-FOVp is the maximum half field of view angle of the second optical system.

[0042] In one embodiment, the visual device satisfies the following relationship:

[0043] 1.5≤FNOe / FNOp≤2.5;

[0044] Wherein, FNOe is the F number of the first optical system, and FNOp is the F number of the second optical system.

[0045] In one embodiment, the second optical system satisfies the following relationship:

[0046] 0.5≤∑CTp / TDp≤0.8;

[0047] Wherein, ΣCTp is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens, and TDp is the distance from the object side surface of the first lens to the image side surface of the sixth lens on the second optical axis.

[0048] In one embodiment, the second optical system satisfies the following relationship:

[0049] 1.5<TAN(FOVp / 3) / EPDp<2.5;

[0050] Wherein, FOVp is the maximum field of view angle of the second optical system, and EPDp is the entrance pupil diameter of the second optical system.

[0051] In one embodiment, the second optical system satisfies the following relationship:

[0052] -1.0<f1p / Fp+f2p / Fp<-5.0;

[0053] Among them, Fp is the effective focal length of the second optical system, f1p is the effective focal length of the first lens, and f2p is the effective focal length of the second lens.

[0054] In one embodiment, the second optical system satisfies the following relationship:

[0055] -1.2≤f4p / f5p<-0.5;

[0056] Wherein, f4p is the effective focal length of the fourth lens, and f5p is the effective focal length of the fifth lens.

[0057] In one embodiment, the second optical system satisfies the following relationship:

[0058] 2.5<f6p / (CT6p*N6p)<3.5;

[0059] Among them, f6p is the effective focal length of the sixth lens, CT6p is the center thickness of the sixth lens, and N6p is the refractive index of the sixth lens.

[0060] The visual device includes a first optical system and a second optical system. The first optical system is used to transmit the image of the screen to the human eye to give the user a virtual immersion feeling; the second optical system is used to capture the position data of the user and the like, and transmit it to the screen of the first optical system through a chip to identify the position of the user and the like, and accurately locate and orient the target object. The virtual immersion of the first optical system is combined with the positioning function of the second optical system, which can break through the spatial limitation of virtual reality and realize the interaction between the real world and the virtual world of the virtual optical system. The visual device matches the maximum half field of view angle, focal length and system height of the first optical system with those of the second optical system through the restriction conditions 0<[TDe*TAN(Semi-FOVe)] / [TDp*TAN(Semi-FOVp)]≤2.5, 1.3≤TDe / Fe≤1.7, 4.5≤TDp / Fp<6.5, so that the component layout of the entire visual device is reasonable, compact and mechanically stable, and the field of view uniformity of the entire optical system is maintained, image distortion and distortion are reduced, and imaging quality and focusing ability are guaranteed. The visual device further limits the ratio between the combined focal length (FG12e) of the first element group and the second element group of the first optical system and the effective focal length (FG3e) of the third element group to optimize the imaging quality of the optical system, reduce the influence of aberration and distortion, and improve the clarity and accuracy of the image. In addition, the first optical system can also control the transmission and reflection of light in the optical system, and can reduce the reflection loss of light and improve the transmittance of light by controlling the appropriate focal length ratio range. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic plan view of a visual device provided in accordance with an embodiment of the present application;

[0062] Figure 2 A schematic plan view of a first optical system of a first example of a visual device according to the above embodiment of the present application is shown;

[0063] Figure 3A An axial chromatic aberration curve of a first optical system of a first example of a visual device according to the above-mentioned embodiment of the present application is shown;

[0064] Figure 3Bshows an astigmatism curve of a first optical system of a first example of a visual device according to the above embodiment of the present application;

[0065] Figure 3C shows a distortion curve of the first optical system of the first example of the visual device according to the above embodiment of the present application;

[0066] Figure 3D A diffraction modulation transfer function curve of the first optical system of the first example of the visual device according to the above embodiment of the present application is shown;

[0067] Figure 4 A schematic plan view of a first optical system of a second example of the visual device according to the above embodiment of the present application is shown;

[0068] Figure 5A shows an axial chromatic aberration curve of the first optical system of the second example of the visual device according to the above embodiment of the present application;

[0069] Figure 5B shows an astigmatism curve of the first optical system of the second example of the visual device according to the above embodiment of the present application;

[0070] Figure 5C shows a distortion curve of the first optical system of the second example of the visual device according to the above embodiment of the present application;

[0071] Figure 5D A diffraction modulation transfer function curve of the first optical system of the second example of the visual device according to the above embodiment of the present application is shown;

[0072] Figure 6 A schematic plan view of a first optical system of a third example of the visual device according to the above embodiment of the present application is shown;

[0073] Fig. 7A An axial chromatic aberration curve of the first optical system of the third example of the visual device according to the above embodiment of the present application is shown;

[0074] Figure 7B shows an astigmatism curve of the first optical system of the third example of the visual device according to the above embodiment of the present application;

[0075] Figure 7C shows a distortion curve of the first optical system of the third example of the visual device according to the above embodiment of the present application;

[0076] Fig.7D A diffraction modulation transfer function curve of the first optical system of the third example of the visual device according to the above embodiment of the present application is shown;

[0077] Figure 8 A schematic plan view of a first optical system of a fourth example of the visual device according to the above-mentioned embodiment of the present application is shown;

[0078] Fig. 9A shows an axial chromatic aberration curve of the first optical system of the fourth example of the visual device according to the above-mentioned embodiment of the present application;

[0079] Fig. 9B shows an astigmatism curve of the first optical system of the fourth example of the visual device according to the above-mentioned embodiment of the present application;

[0080] Fig. 9C shows a distortion curve of the first optical system of the fourth example of the visual device according to the above embodiment of the present application;

[0081] Fig.9D A diffraction modulation transfer function curve of the first optical system of the fourth example of the visual device according to the above embodiment of the present application is shown;

[0082] Fig.10 A schematic plan view of a second optical system of a fifth example of the visual device according to the above-mentioned embodiment of the present application is shown;

[0083] Fig.11A shows an axial chromatic aberration curve of the second optical system of the fifth example of the visual device according to the above-mentioned embodiment of the present application;

[0084] Fig. 11B shows an astigmatism curve of the second optical system of the fifth example of the visual device according to the above-mentioned embodiment of the present application;

[0085] Fig. 11C shows a distortion curve of the second optical system of the fifth example of the visual device according to the above embodiment of the present application;

[0086] Fig.12 A schematic plan view of a second optical system of a sixth example of the visual device according to the above-mentioned embodiment of the present application is shown;

[0087] Fig.13A shows an axial chromatic aberration curve of the second optical system of the sixth example of the visual device according to the above-mentioned embodiment of the present application;

[0088] Fig. 13B shows an astigmatism curve of the second optical system of the sixth example of the visual device according to the above-mentioned embodiment of the present application;

[0089] Fig. 13C shows a distortion curve of the second optical system of the sixth example of the visual device according to the above embodiment of the present application;

[0090] Fig.14 A schematic plan view of a second optical system of a seventh example of the visual device according to the above-mentioned embodiment of the present application is shown;

[0091] Fig.15A shows an axial chromatic aberration curve of the second optical system of the seventh example of the visual device according to the above-mentioned embodiment of the present application;

[0092] Fig. 15B shows an astigmatism curve of the second optical system of the seventh example of the visual device according to the above-mentioned embodiment of the present application;

[0093] Fig. 15C shows a distortion curve of the second optical system of the seventh example of the visual device according to the above embodiment of the present application;

[0094] Fig.16 A schematic plan view of a second optical system of an eighth example of the visual device according to the above-mentioned embodiment of the present application is shown;

[0095] Fig.17A shows an axial chromatic aberration curve of the second optical system of the eighth example of the visual device according to the above-mentioned embodiment of the present application;

[0096] Fig. 17B shows an astigmatism curve of the second optical system of the eighth example of the visual device according to the above-mentioned embodiment of the present application;

[0097] Fig. 17C A distortion curve of the second optical system of the eighth example of the visual device according to the above-mentioned embodiment of the present application is shown.

[0098] Figure numerals: 100, first optical system; STO1, first aperture; Ee1, first lens; RP, reflective polarizing element; QWP1, first quarter wave plate; Ee2, second lens; BS, partial reflection film; QWP2, second quarter wave plate; LP, polarizing film; Ee3, third lens; Ee4, fourth lens; 200, second optical system; Ep1, first lens; Ep2, second lens; Ep3, third lens; STO2, second aperture; Ep4, fourth lens; Ep5, fifth lens; Ep6, sixth lens; Ep7, filter; 300, device body. DETAILED DESCRIPTION

[0099] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0100] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0101] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0102] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0104] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0105] Specifically, Figure 1 As shown, the present application provides a visual device, which may include a device body 300, a first optical system 100 and a second optical system 200, wherein the first optical system 100 is installed on the device body 300, and the second optical system 200 is installed on the device body 300. The first optical system 100 is used to transmit the image of the screen to the human eye, giving the user a virtual immersion feeling. The second optical system 200 can capture the position data of the user, etc., and transmit it to the screen of the first optical system 100 through a chip to identify the position of the user, etc., and accurately locate and orient the target object. The virtual immersion of the first optical system 100 combined with the positioning function of the second optical system 200 can break through the spatial limitations of virtual reality and realize the interaction between the real world and the virtual world of the virtual optical system.

[0106] Exemplarily, the first optical system 100 may further include two first optical systems 100 and a plurality of second optical systems 200. The two first optical systems 100 correspond to the left eye and the right eye, respectively.

[0107] Specifically, Figure 2 , Figure 4 , Figure 6 and Figure 8As shown, in one embodiment, the first optical system 100 includes a first element group, a second element group, a third element group and a fourth element group in sequence from the near eye side to the far eye side along the first optical axis direction; the first element group includes a first lens Ee1, a reflective polarizing element RP and a first quarter wave plate QWP1 arranged in sequence along the first optical axis direction, and the second element group includes a second lens Ee2; the third element group includes a second quarter wave plate QWP2, a polarizing plate LP and a third lens Ee3 arranged in sequence along the first optical axis direction; and the fourth element group includes a fourth lens Ee4. The first optical system 100 satisfies the following relationship: 0<FG12e / |FG3e|<0.2; wherein FG12e is the combined focal length of the first element group and the second element group, and FG3e is the effective focal length of the third element group.

[0108] It can be understood that the first optical system 100 can optimize the imaging quality of the optical system, reduce the influence of aberration and distortion, and improve the clarity and accuracy of the image by limiting the ratio between the combined focal length (FG12e) of the first element group and the second element group and the effective focal length (FG3e) of the third element group within a certain range. In addition, the first optical system 100 can also control the transmission and reflection of light in the optical system, and can reduce the reflection loss of light and improve the transmittance of light by controlling the appropriate focal length ratio range.

[0109] It is worth noting that the near-eye side mentioned in the present application refers to the side of the visual device, lens or eyeglass close to the human eye, and the far-eye side refers to the side of the visual device, lens or eyeglass away from the human eye.

[0110] Optionally, in one embodiment, the far eye side of the second lens Ee2 has a partial reflective film BS. By controlling the characteristics and effects of the partial reflective film BS and matching an appropriate focal length ratio range, the light reflection and interference caused by the partial reflective film BS can be reduced, thereby improving the imaging quality and contrast of the system.

[0111] Optionally, in one embodiment, the first optical system 100 further comprises a first aperture STO1, wherein the first aperture STO1 is disposed on the near-eye side of the first lens Ee1. The first aperture STO1 is used to adjust the brightness of the visual device.

[0112] Optionally, in one embodiment, the first optical system 100 satisfies the following relationship: 1.5≤DT1emax / SL1e≤2.0; wherein DT1emax is the maximum diameter of the first lens Ee1, and SL1e is the distance from the first aperture STO1 to the first lens Ee1 on the first optical axis in the first optical system 100. Such a configuration can achieve the optimization of the design and transmission capability of the first aperture STO1 of the optical system, improve the compactness and mechanical stability of the optical system, reduce the volume and weight of the system, and improve the reliability and durability of the system, and can also optimize the light transmission capability of the first optical system 100, minimize the scattering and loss of light, and improve the transmission efficiency and imaging quality of the optical system.

[0113] Optionally, in one embodiment, the first optical system 100 satisfies the following relationship: 1.5<SDe / DTemax<2.0; wherein SDe is the distance from the first aperture STO1 to the fourth lens Ee4 on the first optical axis in the first optical system 100, and DTemax is the maximum diameter of the first element group, the second element group, the third element group and the fourth element group. In this way, the luminous flux in the optical system can be limited by the ratio range between the distance (SDe) from the first aperture STO1 to the fourth lens Ee4 and the maximum diameter (DTemax) of the element group, and the luminous flux of the system can be adjusted. It is beneficial to balance the brightness and light transmittance of light, and ensure the transmission and imaging quality of light in the system. It is beneficial to optimize the imaging quality of the optical system and reduce the scattering and distortion of light. By controlling the appropriate diameter difference ratio, the focusing ability of the system can be improved, thereby achieving clearer and more accurate imaging. Controlling the ratio range between the maximum diameter of the element group in the optical system and the distance from the first aperture STO1 to the fourth lens Ee4 is beneficial to achieving the compactness and mechanical stability of the optical system, reducing the volume and weight of the system, and improving the reliability and durability of the system.

[0114] Optionally, in one of the embodiments, the first optical system 100 satisfies the following relationship: 0<Fe / |FG1e|<0.3; wherein Fe is the effective focal length of the first optical system 100, and FG1e is the effective focal length of the first element group. Such a configuration can ensure that the ratio between the effective focal length (Fe) of the first optical system 100 and the effective focal length (FG1e) of the first element group is within a certain range. It is beneficial to optimize the imaging quality of the optical system, reduce the influence of aberrations and distortions, and improve the clarity and accuracy of the image. A smaller effective focal length ratio means that the focusing range of the optical system is relatively small, which is suitable for application scenarios that require smaller focal length changes. This can improve the stability and accuracy of the system. It is also beneficial to reduce the volume and weight of the optical system. This is very beneficial for application scenarios that require compactness and lightness, such as mobile devices, portable cameras, etc.

[0115] Optionally, in one embodiment, the first optical system 100 satisfies the following relationship: 0<Fe / |f4e|<0.5; wherein Fe is the effective focal length of the first optical system 100, and f4e is the effective focal length of the fourth lens Ee4. Such a configuration, by limiting the ratio between the effective focal length (Fe) of the first optical system 100 and the effective focal length (f4e) of the fourth lens Ee4 within a certain range, is conducive to optimizing the imaging quality of the optical system, reducing the influence of aberrations and distortions, and improving the clarity and accuracy of the image. It can also make the design of the optical system more flexible, and the focal length ratio can be adjusted according to needs and application scenarios to meet different imaging needs and optical design requirements. A smaller focal length ratio range can reduce the volume and weight of the optical system. It is suitable for some application scenarios that require compactness and lightness.

[0116] Optionally, in one of the embodiments, the first optical system 100 satisfies the following relationship: 6.0<f2e / (N2e*CT2e)<12; wherein f2e is the effective focal length of the second lens Ee2, N2e is the refractive index of the second lens Ee2, and CT2e is the center thickness of the second lens Ee2. Such a configuration can ensure that the ratio between the effective focal length (f2e), the refractive index (N2e) and the center thickness (CT2e) of the second lens Ee2 is within a certain range. This is beneficial to optimizing the imaging quality of the optical system, reducing the influence of aberration and distortion, and improving the clarity and accuracy of the image. It is also possible to control the influence of the refractive index and thickness of the second lens Ee2 on the chromatic aberration of the optical system. An appropriate ratio range can reduce the generation of chromatic aberration and improve the color accuracy and consistency of the optical system.

[0117] Optionally, in one embodiment, the first optical system 100 satisfies the following relationship: -1.0<f2e / R3e+f2e / R4e<0; wherein f2e is the effective focal length of the second lens Ee2, R3e is the curvature radius of the near-eye side of the second lens Ee2, and R4e is the curvature radius of the far-eye side of the second lens Ee2. With such a configuration, the influence of the curvature radius of the second lens Ee2 on the aberration of the optical system can be controlled. This is beneficial to optimizing the imaging quality of the optical system, reducing the generation of aberrations, reducing the influence of distortion, and improving the clarity and accuracy of the image.

[0118] Optionally, in one embodiment, the first optical system 100 satisfies the following relationship: 2.0≤|f3e / R6e|+|f4e / R7e|≤5.0; wherein f3e is the effective focal length of the third lens Ee3, R6e is the radius of curvature of the far eye side of the third lens Ee3, f4e is the effective focal length of the fourth lens Ee4, and R7e is the radius of curvature of the near eye side of the fourth lens Ee4. Such a configuration can ensure that the parameters of the third lens Ee3 and the fourth lens Ee4 are within a certain range, avoiding excessive or too small ratios, thereby improving the stability and reliability of the optical system. By limiting the ratio between the effective focal length (f3e) of the third lens Ee3, the radius of curvature (R6e) of the sixth lens, the effective focal length (f4e) of the fourth lens Ee4, and the radius of curvature (R7e) of the seventh lens within a certain range, it is beneficial to optimize the imaging quality of the optical system, reduce the influence of aberrations and distortions, and improve the clarity and accuracy of the image. In addition, the ratio between the focal length and the corresponding curvature radius of the third lens Ee3 and the fourth lens Ee4 can be controlled to control the aberration of the optical system. An appropriate ratio range can reduce the generation of aberrations and improve the imaging quality and accuracy of the optical system.

[0119] Specifically, Fig.10 , Fig.12 , Fig.14 and Fig.16As shown, in one embodiment, the second optical system 200 includes a first lens Ep1 with negative optical power, a second lens Ep2 with negative optical power, a third lens Ep3 with positive optical power, a fourth lens Ep4 with positive optical power, a fifth lens Ep5 with negative optical power, and a sixth lens Ep6 with positive optical power, which are arranged in sequence from the object side to the image side along the second optical axis. The visual device satisfies the following relationship: 0<[TDe*TAN(Semi-FOVe)] / [TDp*TAN(Semi-FOVp)]≤2.5; 1.3≤TDe / Fe≤1.7; 4.5≤TDp / Fp<6.5; wherein, TDe is the distance from the near eye side of the first lens Ee1 to the far eye side of the fourth lens Ee4 on the first optical axis, Semi-FOVe is the maximum half field of view angle of the first optical system 100, Fe is the effective focal length of the first optical system 100, TDp is the distance from the object side surface of the first lens Ep1 to the image side surface of the sixth lens Ep6 on the second optical axis, Semi-FOVp is the maximum half field of view angle of the second optical system 200, and Fp is the effective focal length of the second optical system 200. With such arrangement, the visual device matches the maximum half field of view angle, focal length and system height of the first optical system with those of the second optical system through the restriction conditions 0<[TDe*TAN(Semi-FOVe)] / [TDp*TAN(Semi-FOVp)]≤2.5, 1.3≤TDe / Fe≤1.7, 4.5≤TDp / Fp<6.5, so that the component layout of the entire visual device is reasonable, compact and mechanically stable, and the field of view uniformity of the entire optical system is maintained, image aberration and distortion are reduced, and imaging quality and focusing capability are guaranteed.

[0120] Optionally, in one of the embodiments, the visual device satisfies the following relationship: 2.0<[Fe*TAN(Semi-FOVe)] / [Fp*TAN(Semi-FOVp)]<9.0; wherein Fe is the effective focal length of the first optical system 100, Semi-FOVe is the maximum half field angle of the first optical system 100, Fp is the effective focal length of the second optical system 200, and Semi-FOVp is the maximum half field angle of the second optical system 200. In this way, the visual device ensures that the ratio between the field angle and the focal length of the first optical system 100 and the second optical system 200 is within a certain range by limiting the condition 2.0<[Fe*TAN(Semi-FOVe)] / [Fp*TAN(Semi-FOVp)]<9.0, and matches the field angle and focal length of the optical system, which can adapt to a wider range of application scenarios and requirements and make the imaging quality of the visual device more uniform and clear.

[0121] Optionally, in one of the embodiments, the visual device satisfies the following relationship: 1.5≤FNOe / FNOp≤2.5; wherein FNOe is the F number of the first optical system 100, and FNOp is the F number of the second optical system 200. With such a configuration, the luminous flux of the optical system can be controlled within a certain range, which is conducive to balancing the brightness and light transmittance of the optical system, ensuring the appropriate transmission of light and imaging quality. It can also maintain the uniformity of the imaging quality of the two optical systems, avoiding obvious brightness differences or imaging quality differences in the image. In addition, it is also conducive to reducing the sensitivity of the system to environmental changes, maintaining the consistency of imaging quality, and thus improving the stability and reliability of the system.

[0122] Optionally, in one embodiment, the second optical system 200 satisfies the following relationship: 0.5≤∑CTp / TDp≤0.8; wherein ∑CTp is the sum of the center thicknesses of the first lens Ep1, the second lens Ep2, the third lens Ep3, the fourth lens Ep4, the fifth lens Ep5 and the sixth lens Ep6, and TDp is the distance from the object side surface of the first lens Ep1 to the image side surface of the sixth lens Ep6 on the second optical axis. Such an arrangement can ensure that the ratio between the sum of the center thicknesses of the lens group (∑CTp) and the object-image side distance (TDp) is within a certain range. This is conducive to optimizing the imaging quality of the optical system, reducing the influence of aberrations and distortions, and improving the clarity and accuracy of the image.

[0123] Optionally, in one of the embodiments, the second optical system 200 satisfies the following relationship: 1.5<TAN(FOVp / 3) / EPDp<2.5; wherein FOVp is the maximum field of view angle of the second optical system 200, and EPDp is the entrance pupil diameter of the second optical system 200. Such a setting can ensure that the ratio between the maximum field of view angle (FOVp) and the entrance pupil diameter (EPDp) of the second optical system 200 is within a certain range. It is beneficial to control the field of view angle of the optical system so that it is within an appropriate range to meet the field of view requirements of specific applications. It is also possible to adjust the ratio of the entrance pupil diameter (EPDp) of the second optical system 200 to the maximum field of view angle (FOVp). An appropriate ratio range can optimize the entrance pupil diameter of the optical system so that it can receive sufficient light and improve the luminous flux and sensitivity of the optical system.

[0124] Optionally, in one embodiment, the second optical system 200 satisfies the following relationship: -1.0<f1p / Fp+f2p / Fp<-5.0; wherein, Fp is the effective focal length of the second optical system 200, f1p is the effective focal length of the first lens Ep1, and f2p is the effective focal length of the second lens Ep2. Such a configuration can ensure that the sum of the ratios between the effective focal length of the first lens Ep1 (f1p), the effective focal length of the second lens Ep2 (f2p) and the effective focal length of the second optical system 200 (Fp) is within a certain range. This is beneficial to optimizing the imaging quality of the optical system, reducing the influence of aberrations and distortions, and improving the clarity and accuracy of the image. It can also ensure that the sum of the ratios between the effective focal lengths of the first lens Ep1 and the second lens Ep2 and the effective focal length of the second optical system 200 is within a certain range, avoiding excessive or too small ratios, thereby improving the stability and reliability of the optical system. It is also possible to control the ratio between the focal lengths of the first lens Ep1 and the second lens Ep2 and the focal length of the second optical system 200. The appropriate ratio range can optimize the optical path of the optical system, reduce defocusing and scattering in the optical system, and improve the optical performance of the optical system.

[0125] Optionally, in one embodiment, the second optical system 200 satisfies the following relationship: -1.2≤f4p / f5p<-0.5; wherein f4p is the effective focal length of the fourth lens Ep4, and f5p is the effective focal length of the fifth lens Ep5. Such an arrangement can optimize the imaging quality, design flexibility, stability and optical path control of the optical system.

[0126] Optionally, in one of the embodiments, the second optical system 200 satisfies the following relationship: 2.5<f6p / (CT6p*N6p)<3.5; wherein f6p is the effective focal length of the sixth lens Ep6, CT6p is the center thickness of the sixth lens Ep6, and N6p is the refractive index of the sixth lens Ep6. Such an arrangement can ensure that the ratio of the effective focal length (f6p) of the sixth lens Ep6 to the product of the center thickness (CT6p) and the refractive index (N6p) of the sixth lens Ep6 is within a certain range. This is beneficial to optimizing the imaging quality of the optical system, reducing the influence of aberrations and distortions, and improving the clarity and accuracy of the image. It is also possible to control the ratio between the focal length of the sixth lens Ep6 and the product of the center thickness and the refractive index. An appropriate ratio range can optimize the optical path of the optical system, reduce defocus and scattering in the optical system, and improve the optical performance of the optical system.

[0127] It is worth noting that, without departing from the technical solution claimed in the present application, the number of lenses constituting the first optical system 100 and the number of lenses constituting the second optical system 200 can be changed to obtain various results and advantages of the present application. For example, although the first optical system 100 includes four element groups and the second optical system 200 includes six lenses in the embodiment, the first optical system 100 is not limited to including four element groups, and the second optical system 200 is not limited to including six lenses. If necessary, the first optical system 100 and / or the second optical system 200 may also include other numbers of lenses or lenses.

[0128] Exemplarily, specific examples of the first optical system or the second optical system applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0129] like Figure 2 As shown, in the first optical system of the first example of the present application, the first optical system includes, from the near eye side to the far eye side along the first optical path, in sequence: a first aperture STO1, a first lens Ee1, a reflective polarizing element RP, a first quarter wave plate QWP1, a second lens Ee2, a partially reflective film BS, a second quarter wave plate QWP2, a polarizer LP, a third lens Ee3 and a fourth lens Ee4.

[0130] The near-eye side surface of the first lens Ee1 is concave, the far-eye side surface of the first lens Ee1 is flat, the near-eye side surface and the far-eye side surface of the second lens Ee2 are both convex, the near-eye side surface of the third lens Ee3 is flat, the far-eye side surface of the third lens Ee3 is convex, the near-eye side surface of the fourth lens Ee4 is concave, and the far-eye side surface of the fourth lens Ee4 is convex, the reflective polarizing element RP is attached to the far-eye side surface of the first lens Ee1, the first quarter-wave plate QWP1 is attached to the far-eye side surface of the reflective polarizing element RP, the partially reflective film BS is attached to the far-eye side surface of the second lens, the second quarter-wave plate QWP2 is attached to the near-eye side surface of the third lens Ee3, and the polarizer LP is attached to the near-eye side surface of the second quarter-wave plate QWP2.

[0131] In the first example, the image light from the far eye side of the first optical system sequentially passes through the fourth lens Ee4, the third lens Ee3, the polarizing plate LP, the second quarter wave plate QWP2, the partial reflection film BS, the second lens Ee2, the first quarter wave plate QWP1 and reaches the reflective polarizing element RP, and then the first reflection occurs at the reflective polarizing element RP. The light reflected for the first time passes through the first quarter wave plate QWP1, the second lens Ee2 and reaches the partial reflection film BS on the far eye side of the second lens Ee2, and then the second reflection occurs at the partial reflection film BS. The light reflected for the second time sequentially passes through the second lens Ee2, the first quarter wave plate QWP1, the reflective polarizing element RP, the first lens Ee1, and the first aperture STO1 and is finally projected into the human eye (not shown).

[0132] Table 1 shows a basic parameter table of the first optical system of the first example, where the units of the radius of curvature and thickness / distance are both millimeters (mm). The image light passes through the components in the order of sequence number 20 to sequence number 1 and is finally projected into the human eye. Table 2 shows a table of cone coefficients of each aspherical mirror surface in the first optical system of the first example.

[0133] Table 1: Basic parameter table of the first optical system of the first example

[0134]

[0135] Table 2: Conic coefficient table of the aspherical mirror surface of the first optical system of the first example

[0136] Serial number A4 A6 A8 A10 A12 A14 A16 2 -7.1616E+00 8.2772E-01 3.0235E-01 -5.3068E-01 -2.3907E-01 2.4602E-01 1.3101E-01 6 -7.0900E-01 -9.4528E-01 2.5643E-01 -4.1704E-02 -1.9067E-03 -2.3416E-02 -1.4597E-04 7 -1.5521E-01 -4.7198E-01 4.6025E-02 -2.3016E-02 -2.2153E-02 -1.9638E-02 -1.2075E-03 17 -2.3440E+00 9.2635E-02 6.2856E-02 -1.2306E-02 0.0000E+00 0.0000E+00 0.0000E+00 18 -2.8456E+00 3.6822E-01 -7.0936E-03 5.1137E-03 5.2051E-04 -9.8296E-04 -4.4996E-05 19 -1.2035E+00 1.8990E-01 1.1246E-02 -7.4827E-03 -9.6291E-04 7.0400E-05 1.1778E-05

[0137] In the first example, the effective focal length Fe of the first optical system is 14.65mm; the effective focal length f1e of the first lens is -65.19mm; the effective focal length f2e of the second lens is 69.45mm; the effective focal length f3e of the third lens is 206.71mm; the effective focal length f4e of the fourth lens is 151.75mm; and the maximum half field of view Semi-FOVe of the first optical system is 94.0°.

[0138] Figure 3A An axial chromatic aberration curve of the first optical system of the first example is shown, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the first optical system. Figure 3B An astigmatism curve of the first optical system of the first example is shown, which indicates meridional field curvature and sagittal field curvature. Figure 3C A distortion curve of the first optical system of the first example is shown, which represents the distortion magnitude values ​​corresponding to different half field angles. Figure 3D The diffraction MTF diagram of the first optical system of the first example is shown. FIG. 3A to FIG. 3DIt can be seen that the first optical system given in the first example can achieve good imaging quality.

[0139] like Figure 4 As shown, in the first optical system of the second example of the present application, the first optical system includes, from the near eye side to the far eye side along the first optical path, in sequence: a first aperture STO1, a first lens Ee1, a reflective polarizing element RP, a first quarter wave plate QWP1, a second lens Ee2, a partially reflective film BS, a second quarter wave plate QWP2, a polarizer LP, a third lens Ee3 and a fourth lens Ee4.

[0140] The near-eye side surface of the first lens Ee1 is concave, the far-eye side surface of the first lens Ee1 is flat, the near-eye side surface and the far-eye side surface of the second lens Ee2 are both convex, the near-eye side surface of the third lens Ee3 is flat, the far-eye side surface of the third lens Ee3 is convex, the near-eye side surface of the fourth lens Ee4 is concave, and the far-eye side surface of the fourth lens Ee4 is convex, the reflective polarizing element RP is attached to the far-eye side surface of the first lens Ee1, the first quarter-wave plate QWP1 is attached to the far-eye side surface of the reflective polarizing element RP, the partially reflective film BS is attached to the far-eye side surface of the second lens, the second quarter-wave plate QWP2 is attached to the near-eye side surface of the third lens Ee3, and the polarizer LP is attached to the near-eye side surface of the second quarter-wave plate QWP2.

[0141] In the second example, the image light from the far eye side of the first optical system passes through the fourth lens Ee4, the third lens Ee3, the polarizing plate LP, the second quarter wave plate QWP2, the partial reflection film BS, the second lens Ee2, the first quarter wave plate QWP1 and reaches the reflective polarizing element RP, and then the first reflection occurs at the reflective polarizing element RP. The light reflected for the first time passes through the first quarter wave plate QWP1, the second lens Ee2 and reaches the partial reflection film BS on the far eye side of the second lens Ee2, and then the second reflection occurs at the partial reflection film BS. The light reflected for the second time passes through the second lens Ee2, the first quarter wave plate QWP1, the reflective polarizing element RP, the first lens Ee1, and the first aperture STO1 in sequence and is finally projected into the human eye (not shown).

[0142] Table 3 shows a basic parameter table of the first optical system of the second example, wherein the units of the radius of curvature and thickness / distance are both in millimeters (mm). The image light passes through the components in the order of sequence number 20 to sequence number 1 and is finally projected into the human eye. Table 4 shows a table of cone coefficients of each aspherical mirror surface in the first optical system of the second example.

[0143] Table 3: Basic parameter table of the first optical system of the second example

[0144]

[0145] Table 4: Conic coefficient table of the aspherical mirror surface of the first optical system of the second example

[0146] Serial number A4 A6 A8 A10 A12 A14 A16 2 -2.8189E+00 1.1328E+00 -8.8125E-01 1.3612E-01 -8.1902E-02 -4.6170E-02 -9.8902E-02 6 -6.4575E-01 -1.3521E+00 3.1136E-01 -1.9493E-01 5.5023E-02 -1.7993E-03 1.7016E-02 7 -4.9868E-01 -1.7338E-01 -7.7461E-03 -9.2784E-02 -1.1174E-02 2.5082E-02 8.7448E-03 18 -1.1797E+00 7.8749E-01 -2.9331E-01 1.0116E-01 -4.0425E-02 -2.1595E-03 3.8120E-03 19 -1.2785E+00 3.8167E-01 -4.1188E-02 -1.6504E-04 1.5429E-01 -7.6685E-02 8.7803E-02

[0147] In the second example, the effective focal length Fe of the first optical system is 13.43mm; the effective focal length f1e of the first lens is 1488.31mm; the effective focal length f2e of the second lens is 70.55mm; the effective focal length f3e of the third lens is 102.84mm; the effective focal length f4e of the fourth lens is -118.52mm; and the maximum half field of view Semi-FOVe of the first optical system is 94.0°.

[0148] Figure 5A An axial chromatic aberration curve of the first optical system of the second example is shown, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the first optical system. Figure 5B An astigmatism curve of the first optical system of the second example is shown, which indicates meridional field curvature and sagittal field curvature. Figure 5C The distortion curve of the first optical system of the second example is shown, which represents the distortion magnitude values ​​corresponding to different half field angles. Figure 5D The diffraction MTF diagram of the first optical system of the second example is shown. FIG. 5A to FIG. 5D It can be seen that the first optical system given in the second example can achieve good imaging quality.

[0149] like Figure 6 As shown, in the first optical system of the third example of the present application, the first optical system includes, from the near eye side to the far eye side along the first optical path, in sequence: a first aperture STO1, a first lens Ee1, a reflective polarizing element RP, a first quarter wave plate QWP1, a second lens Ee2, a partially reflective film BS, a second quarter wave plate QWP2, a polarizer LP, a third lens Ee3 and a fourth lens Ee4.

[0150] The near-eye side surface of the first lens Ee1 is concave, the far-eye side surface of the first lens Ee1 is flat, the near-eye side surface and the far-eye side surface of the second lens Ee2 are both convex, the near-eye side surface of the third lens Ee3 is flat, the far-eye side surface of the third lens Ee3 is convex, the near-eye side surface of the fourth lens Ee4 is concave, and the far-eye side surface of the fourth lens Ee4 is convex, the reflective polarizing element RP is attached to the far-eye side surface of the first lens Ee1, the first quarter-wave plate QWP1 is attached to the far-eye side surface of the reflective polarizing element RP, the partially reflective film BS is attached to the far-eye side surface of the second lens, the second quarter-wave plate QWP2 is attached to the near-eye side surface of the third lens Ee3, and the polarizer LP is attached to the near-eye side surface of the second quarter-wave plate QWP2.

[0151] In the third example, the image light from the far eye side of the first optical system passes through the fourth lens Ee4, the third lens Ee3, the polarizer LP, the second quarter wave plate QWP2, the partial reflection film BS, the second lens Ee2, the first quarter wave plate QWP1 and reaches the reflective polarizing element RP, and then the first reflection occurs at the reflective polarizing element RP. The light reflected for the first time passes through the first quarter wave plate QWP1, the second lens Ee2 and reaches the partial reflection film BS on the far eye side of the second lens Ee2, and then the second reflection occurs at the partial reflection film BS. The light reflected for the second time passes through the second lens Ee2, the first quarter wave plate QWP1, the reflective polarizing element RP, the first lens Ee1, and the first aperture STO1 in sequence and is finally projected into the human eye (not shown).

[0152] Table 5 shows a basic parameter table of the first optical system of the third example, wherein the units of the radius of curvature and thickness / distance are both in millimeters (mm). The image light passes through the components in the order of sequence number 20 to sequence number 1 and is finally projected into the human eye. Table 6 shows a table of cone coefficients of each aspherical mirror surface in the first optical system of the third example.

[0153] Table 5: Basic parameter table of the first optical system of the third example

[0154]

[0155] Table 6: Conic coefficient table of the aspherical mirror surface of the first optical system of the third example

[0156]

[0157]

[0158] In the third example, the effective focal length Fe of the first optical system is 14.85mm; the effective focal length f1e of the first lens is -71.04mm; the effective focal length f2e of the second lens is 63.97mm; the effective focal length f3e of the third lens is -500.00mm; the effective focal length f4e of the fourth lens is -118.52mm; and the maximum half field of view Semi-FOVe of the first optical system is 94.0°.

[0159] Fig. 7A An axial chromatic aberration curve of the first optical system of the third example is shown, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the first optical system. Figure 7B An astigmatism curve of the first optical system of the third example is shown, which indicates meridional field curvature and sagittal field curvature. Figure 7CThe distortion curve of the first optical system of the third example is shown, which represents the distortion magnitude values ​​corresponding to different half field angles. Fig.7D The diffraction MTF diagram of the first optical system of the third example is shown. 7A to 7D It can be seen that the first optical system given in the third example can achieve good imaging quality.

[0160] like Figure 8 As shown, in the first optical system of the fourth example of the present application, the first optical system includes, from the near eye side to the far eye side along the first optical path, in sequence: a first aperture STO1, a first lens Ee1, a reflective polarizing element RP, a first quarter wave plate QWP1, a second lens Ee2, a partially reflective film BS, a second quarter wave plate QWP2, a polarizer LP, a third lens Ee3 and a fourth lens Ee4.

[0161] The near-eye side surface of the first lens Ee1 is concave, the far-eye side surface of the first lens Ee1 is flat, the near-eye side surface and the far-eye side surface of the second lens Ee2 are both convex, the near-eye side surface of the third lens Ee3 is flat, the far-eye side surface of the third lens Ee3 is convex, the near-eye side surface of the fourth lens Ee4 is concave, and the far-eye side surface of the fourth lens Ee4 is convex, the reflective polarizing element RP is attached to the far-eye side surface of the first lens Ee1, the first quarter-wave plate QWP1 is attached to the far-eye side surface of the reflective polarizing element RP, the partially reflective film BS is attached to the far-eye side surface of the second lens, the second quarter-wave plate QWP2 is attached to the near-eye side surface of the third lens Ee3, and the polarizer LP is attached to the near-eye side surface of the second quarter-wave plate QWP2.

[0162] In the fourth example, the image light from the far eye side of the first optical system passes through the fourth lens Ee4, the third lens Ee3, the polarizer LP, the second quarter wave plate QWP2, the partial reflection film BS, the second lens Ee2, the first quarter wave plate QWP1 and reaches the reflective polarizing element RP, and then the first reflection occurs at the reflective polarizing element RP. The light reflected for the first time passes through the first quarter wave plate QWP1, the second lens Ee2 and reaches the partial reflection film BS on the far eye side of the second lens Ee2, and then the second reflection occurs at the partial reflection film BS. The light reflected for the second time passes through the second lens Ee2, the first quarter wave plate QWP1, the reflective polarizing element RP, the first lens Ee1, and the first aperture STO1 in sequence and is finally projected into the human eye (not shown).

[0163] Table 7 shows a basic parameter table of the first optical system of the fourth example, wherein the units of the radius of curvature and thickness / distance are both in millimeters (mm). The image light passes through the components in the order of sequence number 20 to sequence number 1 and is finally projected into the human eye. Table 8 shows a table of cone coefficients of each aspherical mirror surface in the first optical system of the fourth example.

[0164] Table 7: Basic parameter table of the first optical system of the fourth example

[0165]

[0166]

[0167] Table 8: Conic coefficient table of the aspherical mirror surface of the first optical system of the fourth example

[0168] Serial number A4 A6 A8 A10 A12 A14 A16 2 -5.8420E+00 7.7482E-01 2.1614E-01 -4.5392E-01 -1.4942E-01 1.9639E-01 8.9787E-02 6 -2.3421E-01 -8.5769E-01 1.6195E-01 -6.5416E-02 2.2340E-02 -7.4990E-03 1.7443E-03 7 2.1959E-01 -4.8708E-01 -1.6022E-02 -3.8714E-02 -5.1829E-03 -7.8282E-03 -1.1235E-03 17 -2.7450E+00 8.5373E-02 1.0925E-01 -2.7924E-02 0.0000E+00 0.0000E+00 0.0000E+00 18 -1.4516E+00 1.6880E-01 -1.5143E-03 2.4222E-03 7.8787E-04 -5.0969E-04 2.3029E-05 19 -5.2489E-01 1.0183E-01 6.2720E-04 -3.9526E-03 -4.6176E-04 4.4685E-05 8.5206E-05

[0169] In the fourth example, the effective focal length Fe of the first optical system is 17.85mm; the effective focal length f1e of the first lens is -99.03mm; the effective focal length f2e of the second lens is 72.54mm; the effective focal length f3e of the third lens is 101.35mm; the effective focal length f4e of the fourth lens is -56.17mm; and the maximum half field of view Semi-FOVe of the first optical system is 94.0°.

[0170] Fig. 9A An axial chromatic aberration curve of the first optical system of the fourth example is shown, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the first optical system. Fig. 9B An astigmatism curve of the first optical system of the fourth example is shown, which indicates meridional field curvature and sagittal field curvature. Fig. 9C The distortion curve of the first optical system of the fourth example is shown, which represents the distortion magnitude values ​​corresponding to different half field angles. Fig.9D The diffraction MTF diagram of the first optical system of the fourth example is shown. 9A to 9D It can be seen that the first optical system given in the fourth example can achieve good imaging quality.

[0171] like Fig.10As shown, in the second optical system of the fifth example of the present application, the second optical system includes, from the object side surface to the image side surface along the second optical path, a first lens Ep1, a second lens Ep2, a third lens Ep3, a second aperture STO2, a fourth lens Ep4, a fifth lens Ep5, a sixth lens Ep6, and a filter Ep7 in sequence; the first lens Ep1 has a negative optical power, the object side surface S1 of the first lens Ep1 is a convex surface, and the image side surface S2 of the first lens Ep1 is a concave surface; the second lens Ep2 has a negative optical power, the object side surface S3 of the second lens Ep2 is a convex surface, and the image side surface S4 of the second lens Ep2 is a concave surface; the third lens Ep3 has a positive The object side S5 of the third lens Ep3 is concave, and the image side S6 of the third lens Ep3 is convex; the fourth lens Ep4 has positive power, the object side S8 of the fourth lens Ep4 is convex, and the image side S9 of the fourth lens Ep4 is convex; the fifth lens Ep5 has negative power, the object side S10 of the fifth lens Ep5 is concave, and the image side S11 of the fifth lens Ep5 is concave; the sixth lens Ep6 has positive power, the object side S12 of the sixth lens Ep6 is convex, and the image side S13 of the sixth lens Ep6 is concave; the filter Ep7 has an object side S13 and an image side S14; S15 is an imaging surface. The image light from the object side OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S15.

[0172] Table 9 shows a basic parameter table of the second optical system of the fifth example, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 10 shows a conic coefficient table of each aspherical mirror surface in the second optical system of the fifth example.

[0173] Table 9: Basic parameter table of the second optical system of the fifth example

[0174]

[0175]

[0176] Table 10: Conic coefficient table of the aspherical mirror surface of the second optical system of the fifth example

[0177] Face number <![CDATA[ A4 ]]> <![CDATA[ A6 ]]> <![CDATA[ A8 ]]> <![CDATA[ A10 ]]> <![CDATA[ A12 ]]> <![CDATA[ A14 ]]> <![CDATA[ A16 ]]> A18 A20 S3 -5.1516E-01 -6.2261E-02 -1.1760E-02 -8.7060E-03 -1.2055E-03 -1.0022E-03 -5.9589E-04 -1.8544E-04 1.0679E-04 S4 -8.5792E-02 -3.6249E-02 -5.3741E-03 -2.4544E-03 6.4571E-04 8.8725E-05 -3.4774E-04 -3.5712E-04 -4.2024E-05 S5 -9.5375E-02 -4.3832E-03 -6.9227E-04 -2.8589E-04 -4.1373E-05 5.1942E-05 9.6487E-05 7.5356E-05 1.8029E-05 S6 -3.9001E-02 4.4784E-03 -2.8769E-04 8.5705E-05 -6.8400E-06 7.3699E-06 1.6872E-05 6.5380E-06 4.7007E-06 S7 -5.8306E-02 5.2720E-03 -3.0115E-04 2.1748E-04 -2.3610E-05 -9.6801E-06 -1.6298E-05 -1.8366E-06 -4.6589E-07 S8 -2.6148E-03 3.2440E-04 2.5483E-03 -8.3699E-04 5.6027E-04 -1.5745E-04 7.1274E-05 -2.2607E-05 3.4348E-06 S9 -6.1858E-03 5.1537E-03 3.3624E-03 -4.1033E-04 9.3028E-04 -1.7378E-04 9.8977E-05 -2.9564E-05 1.3467E-05 S10 -5.1433E-02 1.0301E-02 -1.8092E-03 -1.2338E-04 3.1987E-04 -3.0904E-05 4.6447E-05 -4.9466E-06 7.4818E-06 S11 -3.4164E-01 -6.1994E-03 -7.8677E-03 -1.8284E-03 -2.4290E-04 -1.9156E-04 -8.7263E-05 -6.8981E-05 -2.7395E-05 S12 -1.8268E-01 -9.8110E-03 4.3970E-04 -1.6417E-03 7.2483E-05 -3.7380E-05 -6.7826E-06 1.7488E-05 -4.5849E-06

[0178] In the fifth example, the effective focal length Fp of the second optical system is 1.20 mm; the effective focal length f1p of the first lens is -3.30 mm; the effective focal length f2p of the second lens is -3.34 mm; the effective focal length f3p of the third lens is 11.92 mm; the effective focal length f4p of the fourth lens is 1.06 mm; the effective focal length f5p of the fifth lens is -1.47 mm; the effective focal length f6p of the sixth lens is 3.50 mm; and the maximum half field of view Spmi-FOVp of the first optical system is 123.7°.

[0179] Fig.11A An axial chromatic aberration curve of the second optical system of the fifth example is shown, which indicates the deviation of the convergence point of light of different wavelengths after passing through the second optical system. Fig. 11B An astigmatism curve of the second optical system of the fifth example is shown, which indicates meridional field curvature and sagittal field curvature. Fig. 11C The distortion curve of the second optical system of the fifth example is shown, which represents the distortion magnitude values ​​corresponding to different half-field angles. FIG. 11A to FIG. 11C It can be seen that the second optical system given in the fifth example can achieve good imaging quality.

[0180] like Fig.12 As shown, in the second optical system of the sixth example of the present application, the second optical system includes, from the object side surface to the image side surface along the second optical path, a first lens Ep1, a second lens Ep2, a third lens Ep3, a second aperture STO2, a fourth lens Ep4, a fifth lens Ep5, a sixth lens Ep6, and a filter Ep7 in sequence; the first lens Ep1 has a negative optical power, the object side surface S1 of the first lens Ep1 is a convex surface, and the image side surface S2 of the first lens Ep1 is a concave surface; the second lens Ep2 has a negative optical power, the object side surface S3 of the second lens Ep2 is a convex surface, and the image side surface S4 of the second lens Ep2 is a concave surface; the third lens Ep3 has a positive The object side S5 of the third lens Ep3 is concave, and the image side S6 of the third lens Ep3 is convex; the fourth lens Ep4 has positive power, the object side S8 of the fourth lens Ep4 is convex, and the image side S9 of the fourth lens Ep4 is convex; the fifth lens Ep5 has negative power, the object side S10 of the fifth lens Ep5 is concave, and the image side S11 of the fifth lens Ep5 is concave; the sixth lens Ep6 has positive power, the object side S12 of the sixth lens Ep6 is convex, and the image side S13 of the sixth lens Ep6 is concave; the filter Ep7 has an object side S13 and an image side S14; S15 is an imaging surface. The image light from the object side OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S15.

[0181] Table 11 shows a basic parameter table of the second optical system of the sixth example, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 12 shows a conic coefficient table of each aspherical mirror surface in the second optical system of the sixth example.

[0182] Table 11: Basic parameter table of the second optical system of the sixth example

[0183]

[0184]

[0185] Table 12: Conic coefficient table of the aspherical mirror surface of the second optical system of the sixth example

[0186] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S3 -5.1989E-01 -6.1953E-02 -1.1653E-02 -8.5428E-03 -1.0229E-03 -1.0916E-03 -9.9053E-04 -5.4091E-04 -1.2321E-04 S4 -8.7275E-02 -3.8202E-02 -5.2434E-03 -2.5009E-03 1.0419E-03 5.6805E-04 -1.5092E-04 -3.4623E-04 -1.3709E-04 S5 -9.5920E-02 -4.2299E-03 -6.6463E-05 1.2095E-04 7.3219E-05 -2.3951E-05 -3.0242E-06 2.3917E-05 8.0846E-06 S6 -3.7269E-02 4.6443E-03 -3.9225E-04 -5.1302E-06 -1.1302E-04 -7.0242E-05 -3.7677E-05 -1.8562E-05 -2.0579E-06 S7 -5.7004E-02 5.5098E-03 -4.3141E-04 1.8642E-04 -2.6808E-05 2.3923E-05 1.8553E-05 1.6072E-05 2.8355E-06 S8 -2.1056E-03 1.0306E-04 2.6336E-03 -7.7320E-04 5.5470E-04 -1.9236E-04 7.3818E-05 -2.4592E-05 8.9269E-06 S9 -6.6738E-03 4.5080E-03 3.2625E-03 -3.9671E-04 7.1532E-04 -3.4638E-04 3.7731E-05 -5.6222E-05 1.4884E-05 S10 -4.9543E-02 1.1196E-02 -2.3129E-03 7.7545E-05 3.0691E-04 -2.1352E-05 7.6036E-05 8.5226E-06 1.3347E-05 S11 -3.4293E-01 -4.2440E-03 -8.5652E-03 -1.4965E-03 -2.8555E-04 -2.1571E-04 -9.7592E-05 -5.7078E-05 -2.4637E-05 S12 -1.7884E-01 -1.1027E-02 7.1123E-04 -1.5158E-03 1.7528E-04 -4.8468E-05 -2.6491E-05 1.3312E-05 -6.7697E-06

[0187] In the sixth example, the effective focal length Fp of the second optical system is 1.11 mm; the effective focal length f1p of the first lens is -3.42 mm; the effective focal length f2p of the second lens is -3.18 mm; the effective focal length f3p of the third lens is 12.32 mm; the effective focal length f4p of the fourth lens is 1.04 mm; the effective focal length f5p of the fifth lens is -1.50 mm; the effective focal length f6p of the sixth lens is 3.58 mm; and the maximum half field of view angle Spmi-FOVp of the first optical system is 134.7°.

[0188] Fig.13A An axial chromatic aberration curve of the second optical system of the sixth example is shown, which indicates the deviation of the convergence point of light of different wavelengths after passing through the second optical system. Fig. 13B An astigmatism curve of the second optical system of the sixth example is shown, which indicates meridional field curvature and sagittal field curvature. Fig. 13C The distortion curve of the second optical system of the sixth example is shown, which represents the distortion magnitude values ​​corresponding to different half-viewing angles. FIG. 13A to FIG. 13C It can be seen that the second optical system given in the sixth example can achieve good imaging quality.

[0189] like Fig.14As shown, in the second optical system of the seventh example of the present application, the second optical system includes, from the object side surface to the image side surface along the second optical path, a first lens Ep1, a second lens Ep2, a third lens Ep3, a second aperture STO2, a fourth lens Ep4, a fifth lens Ep5, a sixth lens Ep6, and a filter Ep7; the first lens Ep1 has a negative optical power, the object side surface S1 of the first lens Ep1 is a convex surface, and the image side surface S2 of the first lens Ep1 is a concave surface; the second lens Ep2 has a negative optical power, the object side surface S3 of the second lens Ep2 is a convex surface, and the image side surface S4 of the second lens Ep2 is a concave surface; the third lens Ep3 has a positive The object side S5 of the third lens Ep3 is concave, and the image side S6 of the third lens Ep3 is convex; the fourth lens Ep4 has positive power, the object side S8 of the fourth lens Ep4 is convex, and the image side S9 of the fourth lens Ep4 is convex; the fifth lens Ep5 has negative power, the object side S10 of the fifth lens Ep5 is concave, and the image side S11 of the fifth lens Ep5 is concave; the sixth lens Ep6 has positive power, the object side S12 of the sixth lens Ep6 is convex, and the image side S13 of the sixth lens Ep6 is concave; the filter Ep7 has an object side S13 and an image side S14; S15 is an imaging surface. The image light from the object side OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S15.

[0190] Table 13 shows a basic parameter table of the second optical system of the seventh example, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 14 shows a conic coefficient table of each aspherical mirror surface in the second optical system of the seventh example.

[0191] Table 13: Basic parameter table of the second optical system of the seventh example

[0192]

[0193]

[0194] Table 14: Conic coefficient table of the aspherical mirror surface of the second optical system of the seventh example

[0195] Face number <![CDATA[ A4 ]]> <![CDATA[ A6 ]]> <![CDATA[ A8 ]]> <![CDATA[ A10 ]]> <![CDATA[ A12 ]]> <![CDATA[ A14 ]]> <![CDATA[ A16 ]]> A18 A20 S3 -2.9611E-01 1.1685E-02 1.3071E-03 -2.0419E-04 4.4989E-05 1.8482E-04 2.3939E-04 -1.2867E-04 -1.3625E-05 S4 3.0779E-01 9.2765E-03 -2.2797E-03 -3.6505E-03 -8.7990E-04 -6.3766E-04 2.3390E-04 1.4587E-04 1.3837E-04 S5 -4.8122E-02 -5.8714E-03 -1.0576E-03 6.9899E-04 3.8920E-05 1.9281E-04 1.4205E-05 3.5715E-05 -6.8209E-05 S6 5.9647E-02 -3.4734E-03 9.8853E-04 1.9283E-04 2.0529E-04 1.1020E-04 -1.8914E-06 -5.7410E-05 -1.1805E-05 S7 1.4607E-02 -8.9991E-03 -1.9837E-04 -3.5977E-04 1.4603E-05 -3.2125E-05 6.8313E-06 -8.6517E-06 -4.0376E-06 S8 1.0203E-02 -2.7039E-03 -4.5583E-04 8.1377E-04 -7.6264E-04 3.5203E-04 -2.0037E-04 7.9281E-05 -3.5719E-05 S9 -5.9190E-02 6.5996E-03 -2.1257E-03 1.0097E-03 -6.2915E-04 2.3410E-04 1.4315E-07 2.2181E-05 8.3763E-05 S10 8.6774E-02 -1.2888E-02 -1.5670E-03 3.2315E-04 -8.8883E-04 2.5064E-04 -6.4055E-05 6.6127E-06 -7.3133E-06 S11 8.3993E-02 2.1791E-03 -2.2232E-03 1.1544E-03 -9.6981E-04 -2.7160E-05 3.3598E-05 -1.9763E-05 8.9317E-05 S12 4.1634E-02 2.0194E-02 3.8117E-03 5.9495E-04 -3.3132E-04 -3.0554E-04 -2.1176E-04 -3.5751E-05 -2.9559E-05

[0196] In the seventh example, the effective focal length Fp of the second optical system is 1.26 mm; the effective focal length f1p of the first lens is -8.92 mm; the effective focal length f2p of the second lens is -2.97 mm; the effective focal length f3p of the third lens is 4.10 mm; the effective focal length f4p of the fourth lens is 1.63 mm; the effective focal length f5p of the fifth lens is -1.39 mm; the effective focal length f6p of the sixth lens is 2.28 mm; and the maximum half field of view Spmi-FOVp of the first optical system is 158.4°.

[0197] Fig.15A An axial chromatic aberration curve of the second optical system of the seventh example is shown, which indicates the deviation of the convergence point of light of different wavelengths after passing through the second optical system. Fig. 15B An astigmatism curve of the second optical system of the seventh example is shown, which indicates meridional field curvature and sagittal field curvature. Fig. 15C The distortion curve of the second optical system of the seventh example is shown, which represents the distortion magnitude values ​​corresponding to different half-viewing angles. FIG. 15A to FIG. 15C It can be seen that the second optical system given in the seventh example can achieve good imaging quality.

[0198] like Fig.16 As shown, in the second optical system of the eighth example of the present application, the second optical system includes, from the object side surface to the image side surface along the second optical path, a first lens Ep1, a second lens Ep2, a third lens Ep3, a second aperture STO2, a fourth lens Ep4, a fifth lens Ep5, a sixth lens Ep6, and a filter Ep7; the first lens Ep1 has a negative optical power, the object side surface S1 of the first lens Ep1 is a convex surface, and the image side surface S2 of the first lens Ep1 is a concave surface; the second lens Ep2 has a negative optical power, the object side surface S3 of the second lens Ep2 is a convex surface, and the image side surface S4 of the second lens Ep2 is a concave surface; the third lens Ep3 has a positive The object side S5 of the third lens Ep3 is convex, and the image side S6 of the third lens Ep3 is convex; the fourth lens Ep4 has positive power, the object side S8 of the fourth lens Ep4 is convex, and the image side S9 of the fourth lens Ep4 is convex; the fifth lens Ep5 has negative power, the object side S10 of the fifth lens Ep5 is concave, and the image side S11 of the fifth lens Ep5 is concave; the sixth lens Ep6 has positive power, the object side S12 of the sixth lens Ep6 is convex, and the image side S13 of the sixth lens Ep6 is concave; the filter Ep7 has an object side S13 and an image side S14; S15 is an imaging surface. The image light from the object side OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S15.

[0199] Table 115 shows a basic parameter table of the second optical system of the eighth example, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 16 shows a conic coefficient table of each aspherical mirror surface in the second optical system of the eighth example.

[0200] Table 15: Basic parameter table of the second optical system of the eighth example

[0201]

[0202]

[0203] Table 16: Conic coefficient table of the aspherical mirror surface of the second optical system of the eighth example

[0204] Face number <![CDATA[ A4 ]]> <![CDATA[ A6 ]]> <![CDATA[ A8 ]]> <![CDATA[ A10 ]]> <![CDATA[ A12 ]]> <![CDATA[ A14 ]]> <![CDATA[ A16 ]]> A18 A20 S3 -2.9611E-01 1.1685E-02 1.3071E-03 -2.0419E-04 4.4989E-05 1.8482E-04 2.3939E-04 -1.2867E-04 -1.3625E-05 S4 3.0779E-01 9.2765E-03 -2.2797E-03 -3.6505E-03 -8.7990E-04 -6.3766E-04 2.3390E-04 1.4587E-04 1.3837E-04 S5 -4.8122E-02 -5.8714E-03 -1.0576E-03 6.9899E-04 3.8920E-05 1.9281E-04 1.4205E-05 3.5715E-05 -6.8209E-05 S6 5.9647E-02 -3.4734E-03 9.8853E-04 1.9283E-04 2.0529E-04 1.1020E-04 -1.8914E-06 -5.7410E-05 -1.1805E-05 S7 1.4607E-02 -8.9991E-03 -1.9837E-04 -3.5977E-04 1.4603E-05 -3.2125E-05 6.8313E-06 -8.6517E-06 -4.0376E-06 S8 1.0203E-02 -2.7039E-03 -4.5583E-04 8.1377E-04 -7.6264E-04 3.5203E-04 -2.0037E-04 7.9281E-05 -3.5719E-05 S9 -5.9190E-02 6.5996E-03 -2.1257E-03 1.0097E-03 -6.2915E-04 2.3410E-04 1.4315E-07 2.2181E-05 8.3763E-05 S10 8.6774E-02 -1.2888E-02 -1.5670E-03 3.2315E-04 -8.8883E-04 2.5064E-04 -6.4055E-05 6.6127E-06 -7.3133E-06 S11 8.3993E-02 2.1791E-03 -2.2232E-03 1.1544E-03 -9.6981E-04 -2.7160E-05 3.3598E-05 -1.9763E-05 8.9317E-05 S12 4.1634E-02 2.0194E-02 3.8117E-03 5.9495E-04 -3.3132E-04 -3.0554E-04 -2.1176E-04 -3.5751E-05 -2.9559E-05

[0205] In the eighth example, the effective focal length Fp of the second optical system is 1.10 mm; the effective focal length f1p of the first lens is -3.67 mm; the effective focal length f2p of the second lens is -4.56 mm; the effective focal length f3p of the third lens is 3.57 mm; the effective focal length f4p of the fourth lens is 1.78 mm; the effective focal length f5p of the fifth lens is -1.76 mm; the effective focal length f6p of the sixth lens is 3.09 mm; and the maximum half field of view angle Spmi-FOVp of the first optical system is 161.6°.

[0206] Fig.17A An axial chromatic aberration curve of the second optical system of the eighth example is shown, which indicates the deviation of the convergence point of light of different wavelengths after passing through the second optical system. Fig. 17B An astigmatism curve of the second optical system of the eighth example is shown, which indicates meridional field curvature and sagittal field curvature. Fig. 17C The distortion curve of the second optical system of the eighth example is shown, which represents the distortion magnitude values ​​corresponding to different half-field angles. 17A to 17C It can be seen that the second optical system given in the eighth example can achieve good imaging quality.

[0207] In summary, the basic data of the first optical systems of the first to fourth examples and the second optical systems of the fifth to eighth examples are shown in Table 17 below.

[0208] Table 17: Basic data table of the first optical system and the second optical system of each example

[0209]

[0210] The first optical systems of the first to fourth examples and the second optical systems of the fifth to eighth examples of the present application may be combined with each other to provide sixteen embodiments of the visual device.

[0211] In one embodiment, the visual device may include a combination of the first optical system of the first example and the second optical system of the fifth example.

[0212] In one embodiment, the visual device may include a combination of the first optical system of the first example and the second optical system of the sixth example.

[0213] In one embodiment, the visual device may include a combination of the first optical system of the first example and the second optical system of the seventh example.

[0214] In one embodiment, the visual device may include a combination of the first optical system of the first example and the second optical system of the eighth example.

[0215] In one embodiment, the visual device may include a combination of the first optical system of the second example and the second optical system of the fifth example.

[0216] In one embodiment, the visual device may include a combination of the first optical system of the second example and the second optical system of the sixth example.

[0217] In one embodiment, the visual device may include a combination of the first optical system of the second example and the second optical system of the seventh example.

[0218] In one embodiment, the visual device may include a combination of the first optical system of the second example and the second optical system of the eighth example.

[0219] In one embodiment, the visual device may include a combination of the first optical system of the third example and the second optical system of the fifth example.

[0220] In one embodiment, the visual device may include a combination of the first optical system of the third example and the second optical system of the sixth example.

[0221] In one embodiment, the visual device may include a combination of the first optical system of the third example and the second optical system of the seventh example.

[0222] In one embodiment, the visual device may include a combination of the first optical system of the third example and the second optical system of the eighth example.

[0223] In one embodiment, the visual device may include a combination of the first optical system of the fourth example and the second optical system of the fifth example.

[0224] In one embodiment, the visual device may include a combination of the first optical system of the fourth example and the second optical system of the sixth example.

[0225] In one embodiment, the visual device may include a combination of the first optical system of the fourth example and the second optical system of the seventh example.

[0226] In one embodiment, the visual device may include a combination of the first optical system of the fourth example and the second optical system of the eighth example.

[0227] The above sixteen embodiments satisfy the conditional values ​​shown in Table 18.

[0228] Table 18: Conditions of sixteen visual devices

[0229]

[0230]

[0231] The technical features of the above embodiment can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiment are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0232] The above embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A visual device, characterized in that: include: Device body; a first optical system, the first optical system is installed in the device body, the first optical system includes a first element group, a second element group, a third element group and a fourth element group in sequence along the first optical axis from the near eye side to the far eye side; the first element group includes a first lens, a reflective polarizing element and a first quarter wave plate arranged in sequence along the first optical axis; the second element group includes a second lens; the third element group includes a second quarter wave plate, a polarizing film and a third lens arranged in sequence along the first optical axis; the fourth element group includes a fourth lens; and a second optical system, the second optical system being mounted on the device body, the second optical system including, from the object side to the image side along the second optical axis, a first lens having negative optical power, a second lens having negative optical power, a third lens having positive optical power, a fourth lens having positive optical power, a fifth lens having negative optical power, and a sixth lens having positive optical power; The first optical system satisfies the following relationship: 0<FG12e / |FG3e|<0.2; The visual device satisfies the following relationship: 0<[TDe*TAN(Semi-FOVe)] / [TDp*TAN(Semi-FOVp)]≤2.5; 1.3≤TDe / Fe≤1.7; 4.5≤TDp / Fp<6.5; Among them, FG12e is the combined focal length of the first element group and the second element group, FG3e is the effective focal length of the third element group, TDe is the distance from the near eye side of the first lens to the far eye side of the fourth lens on the first optical axis, Semi-FOVe is the maximum half field of view angle of the first optical system, Fe is the effective focal length of the first optical system, TDp is the distance from the object side of the first lens to the image side of the sixth lens on the second optical axis, Semi-FOVp is the maximum half field of view angle of the second optical system, and Fp is the effective focal length of the second optical system.

2. The visual device according to claim 1, characterized in that: The second lens has a partially reflective film on the far eye side.

3. The visual device according to claim 1, characterized in that: The first optical system further includes a first aperture stop, which is disposed on the near-eye side of the first lens.

4. The visual device according to claim 3, characterized in that: The first optical system satisfies the following relationship: 1.5≤DT1emax / SL1e≤2.0; Wherein, DT1emax is the maximum diameter of the first lens, and SL1e is the distance from the first aperture to the first lens on the first optical axis in the first optical system.

5. The visual device according to claim 3, characterized in that: The first optical system satisfies the following relationship: 1.5<SDe / DTemax<2.0; Wherein, SDe is the distance from the first aperture to the fourth lens on the first optical axis in the first optical system, and DTemax is the maximum diameter of the first element group, the second element group, the third element group and the fourth element group.

6. The visual device according to claim 1, characterized in that: The first optical system satisfies the following relationship: 0<Fe / |FG1e|<0.3; Among them, Fe is the effective focal length of the first optical system, and FG1e is the effective focal length of the first element group.

7. The visual device according to claim 1, characterized in that: The first optical system satisfies the following relationship: 0<Fe / |f4e|<0.5; Among them, Fe is the effective focal length of the first optical system, and f4e is the effective focal length of the fourth lens.

8. The visual device according to claim 1, characterized in that: The first optical system satisfies the following relationship: 6.0<f2e / (N2e*CT2e)<12; Among them, f2e is the effective focal length of the second lens, N2e is the refractive index of the second lens, and CT2e is the center thickness of the second lens.

9. The visual device according to claim 1, characterized in that: The first optical system satisfies the following relationship: -1.0<f2e / R3e+f2e / R4e<0; Among them, f2e is the effective focal length of the second lens, R3e is the curvature radius of the near eye side of the second lens, and R4e is the curvature radius of the far eye side of the second lens.

10. The visual device according to claim 1, characterized in that: The first optical system satisfies the following relationship: 2.0≤|f3e / R6e|+|f4e / R7e|≤5.0; Among them, f3e is the effective focal length of the third lens, R6e is the curvature radius of the far eye side of the third lens, f4e is the effective focal length of the fourth lens, and R7e is the curvature radius of the near eye side of the fourth lens.

11. The visual device according to any one of claims 1 to 10, characterized in that: The visual device satisfies the following relationship: 2.0<[Fe*TAN(Semi-FOVe)] / [Fp*TAN(Semi-FOVp)]<9.0; Among them, Fe is the effective focal length of the first optical system, Semi-FOVe is the maximum half field of view angle of the first optical system, Fp is the effective focal length of the second optical system, and Semi-FOVp is the maximum half field of view angle of the second optical system.

12. The visual device according to any one of claims 1 to 10, characterized in that: The visual device satisfies the following relationship: 1.5≤FNOe / FNOp≤2.5; Wherein, FNOe is the F number of the first optical system, and FNOp is the F number of the second optical system.

13. The visual device according to any one of claims 1 to 10, characterized in that: The second optical system satisfies the following relationship: 0.5≤∑CTp / TDp≤0.8; Wherein, ΣCTp is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens, and TDp is the distance from the object side surface of the first lens to the image side surface of the sixth lens on the second optical axis.

14. The visual device according to any one of claims 1 to 10, characterized in that: The second optical system satisfies the following relationship: 1.5<TAN(FOVp / 3) / EPDp<2.5; Wherein, FOVp is the maximum field of view angle of the second optical system, and EPDp is the entrance pupil diameter of the second optical system.

15. The visual device according to any one of claims 1 to 10, characterized in that: The second optical system satisfies the following relationship: -1.0<f1p / Fp+f2p / Fp<-5.0; Among them, Fp is the effective focal length of the second optical system, f1p is the effective focal length of the first lens, and f2p is the effective focal length of the second lens.

16. The visual device according to any one of claims 1 to 10, characterized in that: The second optical system satisfies the following relationship: -1.2≤f4p / f5p<-0.5; Wherein, f4p is the effective focal length of the fourth lens, and f5p is the effective focal length of the fifth lens.

17. The visual device according to any one of claims 1 to 10, characterized in that: The second optical system satisfies the following relationship: 2.5<f6p / (CT6p*N6p)<3.5; Among them, f6p is the effective focal length of the sixth lens, CT6p is the center thickness of the sixth lens, and N6p is the refractive index of the sixth lens.

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