CN220438661U - Visual system and VR equipment comprising same - Google Patents
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- CN220438661U CN220438661U CN202321427644.XU CN202321427644U CN220438661U CN 220438661 U CN220438661 U CN 220438661U CN 202321427644 U CN202321427644 U CN 202321427644U CN 220438661 U CN220438661 U CN 220438661U
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Abstract
The application discloses a visual system, which comprises a lens barrel, a first element group and a second element group, wherein the first element group and the second element group are assembled in the lens barrel and are sequentially arranged from a first side to a second side along an optical axis, and the first element group has positive focal power and comprises a first lens, a reflective polarizing element, a quarter wave plate and a second lens; the second element group has negative focal power and comprises a third lens; the first lens and the second lens have a first spacing element therebetween. The effective focal length FG1 of the first element group, the effective focal length FG2 of the second element group, the inner diameter D1m of the second side of the first spacing element, and the outer diameter D1m of the second side of the first spacing element satisfy the following conditional expression: 0.5< |Fg1+Fg2|/(d1m+D1m) <2.5. The application also provides a VR device including the visual system.
Description
Technical Field
The present application relates to the field of optical elements, and more particularly, to a vision system and VR device including the same.
Background
Since the concept of "meta universe" was proposed, AR (augmented reality)/VR (virtual reality) has emerged as a trigger for the second development. As an entrance to human-computer interaction, VR imaging lenses play an important role. On one hand, the imaging quality of the VR imaging lens needs to meet the resolution requirement of human eyes; on the other hand, the aspheric surface or fresnel lens body in the early stage is long, and when the user experiences, the center of gravity of the device is positioned forward, so that the experience is poor, and improvement is needed.
Based on the above requirements, a foldback scheme is proposed, and the body length of the lens can be significantly compressed, for example, can be compressed to half of the original length by folding the optical path, so that the center of gravity of the display device is moved backwards, and the experience of consumers is improved. However, for the current optical system based on optical path refraction, the compactness of the structure and the imaging quality of the system still need to be further improved. Therefore, how to design each lens and its spacing element more reasonably to improve the compactness, stability and workability of the lens is one of the technical problems that needs to be solved by those skilled in the art.
Disclosure of Invention
The application provides a visual system which can comprise a lens barrel, a first element group and a second element group, wherein the first element group and the second element group are assembled in the lens barrel and are sequentially arranged from a first side to a second side along an optical axis, and the first element group has positive focal power and comprises a first lens, a reflective polarizing element, a quarter wave plate and a second lens; the second element group has negative optical power and comprises a third lens; a first spacing element is arranged between the first lens and the second lens; the effective focal length FG1 of the first element group, the effective focal length FG2 of the second element group, the inner diameter D1m of the second side of the first spacing element, and the outer diameter D1m of the second side of the first spacing element may satisfy: 0.5< |Fg1+Fg2|/(d1m+D1m) <2.5.
In one embodiment, the radius of curvature R3 of the first side of the second lens, the radius of curvature R4 of the second side of the second lens, the inner diameter D1s of the first side of the first spacing element and the outer diameter D1s of the first side of the first spacing element may satisfy: 0.6< (R3+R4)/(d1s+D1s) <1.8.
In one embodiment, the outer diameter D0s of the first side end surface of the lens barrel, the inner diameter D0s of the first side end surface of the lens barrel, and the entrance pupil diameter EPD of the visual system may satisfy: 5< (D0 s-D0 s)/EPD <6.
In one embodiment, the effective focal length f of the visual system, the distance EP01 from the first side end surface of the lens barrel to the first side surface of the first spacer element along the optical axis, and the maximum thickness CP1 of the first spacer element along the optical axis direction may satisfy: 3<f/(EP 01+ CP 1) <4.5.
In one embodiment, the inner diameter d1s of the first side surface of the first spacer element, the center thickness CT1 of the first lens on the optical axis, the center thickness CTR of the reflective polarizing element on the optical axis, and the center thickness CTQ of the quarter-wave plate on the optical axis may satisfy: 19< d1 s/(CT1+CTR+CTQ) <22.
In one embodiment, an inner diameter d0m of the second side end surface of the lens barrel and a distance TD between the first side surface of the first lens and the second side surface of the third lens on the optical axis may satisfy: 2.9< d0m/TD <4.9.
In one embodiment, a distance L on the optical axis from the first side end surface of the lens barrel to the second side end surface of the lens barrel, a center thickness CT1 on the optical axis of the first lens, a center thickness CT2 on the optical axis of the second lens, and a center thickness CT3 on the optical axis of the third lens may satisfy: 1<L/(Ct1+Ct2+Ct3) <2.
In one embodiment, the radius of curvature R5 of the first side of the third lens and the maximum outer diameter D0max of the lens barrel and the minimum inner diameter D0min of the lens barrel may satisfy: 3.5< |R5|/(D0 max-D0 min) <4.5.
In one embodiment, the minimum inner diameter d1min of the first spacer element, the distance T12 on the optical axis from the second side of the first lens to the first side of the second lens, and the distance T23 on the optical axis from the second side of the second lens to the first side of the third lens may satisfy: 34< d1 min/(T12+T23) <43.
In one embodiment, the radius of curvature R1 of the first side of the first lens and the maximum outer diameter D1max of the first spacer element may satisfy: 3.5< R1/D1max <12.5.
In one embodiment, the inner diameter D0m of the second side end surface of the lens barrel and the outer diameter D0m of the second side end surface of the lens barrel may satisfy: 0.7< |FG2|/(d0m+D0m) <2.2.
In one embodiment, the effective focal length f of the visual system, the entrance pupil diameter EPD of the visual system, the distance L on the optical axis from the first side end surface of the lens barrel to the second side end surface of the lens barrel, and the distance EP01 along the optical axis from the first side end surface of the lens barrel to the first side surface of the first spacer element may satisfy: 26< (f/EPD) × (L/EP 01) <41.
In another aspect, the present application further provides a VR device, which may include the visual system provided in any one of the foregoing embodiments, wherein the first side is a human eye side and the second side is a display side.
The visual system comprises a first element group and a second element group which are assembled in a lens barrel and are sequentially arranged from a first side to a second side along an optical axis, wherein the first element group has positive focal power and comprises a first lens, a reflective polarizing element, a quarter wave plate and a second lens; the second element group has negative focal power and comprises a third lens; and a first spacing element is arranged between the first lens and the second lens; meanwhile, the effective focal length FG1 of the first element group, the effective focal length FG2 of the second element group, the inner diameter D1m of the second side surface of the first spacing element, and the outer diameter D1m of the second side surface of the first spacing element are controlled to satisfy the condition 0.5< |fg1+fg2|/(d1m+d1m) <2.5. This kind of setting of visual system that this application disclosed can restrict the appearance of first lens, second lens and third lens, satisfies the support of first interval element to first lens and second lens structure, is favorable to realizing the compactibility of lens structure and improves the machinability.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 illustrates a schematic view of the structure and some parameters of a visual system according to an exemplary embodiment of the present application;
FIGS. 2, 3 and 4 show schematic structural views of a visual system according to example 1 of the present application in three embodiments, respectively;
FIGS. 5, 6 and 7 show on-axis chromatic aberration curves, astigmatism curves and distortion curves, respectively, for the visual system of example 1;
FIGS. 8, 9 and 10 show schematic structural views of a visual system according to example 2 of the present application in three embodiments, respectively;
FIGS. 11, 12 and 13 show on-axis chromatic aberration curves, astigmatism curves and distortion curves, respectively, for the visual system of example 2;
FIGS. 14, 15 and 16 show schematic structural views of a visual system according to example 3 of the present application in three embodiments, respectively; and
fig. 17, 18 and 19 show on-axis chromatic aberration curves, astigmatism curves and distortion curves, respectively, of the visual system of example 3.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, use of "may" means "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The following examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The vision system according to the exemplary embodiment of the present application may include a lens barrel and a lens group assembled in the lens barrel, and the lens group may include a first element group and a second element group sequentially arranged from a first side to a second side along an optical axis.
In an exemplary embodiment, the first element group may have positive optical power. The first element group may include a first lens, a reflective polarizing element, a quarter wave plate, and a second lens.
In an exemplary embodiment, the second element group may have negative optical power. The second element group may include a third lens.
In an exemplary embodiment, the visual system may further include a first spacing element between the first lens and the second lens.
In an exemplary embodiment, the visual system of the present application may satisfy the conditional expression 0.5< |fg1+fg 2|/(d1m+d1m) <2.5, where FG1 is the effective focal length of the first element group, FG2 is the effective focal length of the second element group, D1m is the inner diameter of the second side of the first spacing element, and D1m is the outer diameter of the second side of the first spacing element. It will be appreciated that the surface of each element in the visual system that is closer to the first side and farther from the second side is the first side of the element and the surface of each element that is closer to the second side and farther from the first side is the second side of the element.
The visual system provided according to the exemplary embodiment of the present application includes a first element group and a second element group which are assembled in a lens barrel and sequentially arranged from a first side to a second side along an optical axis, wherein the first element group has positive optical power and includes a first lens, a reflective polarizing element, a quarter wave plate, and a second lens; the second element group has negative focal power and comprises a third lens; and a first spacing element is arranged between the first lens and the second lens; meanwhile, the effective focal length FG1 of the first element group, the effective focal length FG2 of the second element group, the inner diameter D1m of the second side surface of the first spacing element, and the outer diameter D1m of the second side surface of the first spacing element are controlled to satisfy the condition 0.5< |fg1+fg2|/(d1m+d1m) <2.5. By this arrangement of the visual system, the outer shapes of the first lens, the second lens and the third lens can be restricted, the support of the first spacing element to the first lens and the second lens structure can be satisfied, the compactness of the lens structure can be realized, and the workability can be improved.
In an exemplary embodiment, the first side may be, for example, a human eye side, and the second side may be, for example, a display side. The visual system may be used, for example, in a variety of VR display devices.
In an exemplary embodiment, the vision system of the present application may satisfy the conditional expression 0.6< (r3+r4)/(d1s+d1s) <1.8, where R3 is a radius of curvature of the first side of the second lens, R4 is a radius of curvature of the second side of the second lens, D1s is an inner diameter of the first side of the first spacer element, and D1s is an outer diameter of the first side of the first spacer element. By controlling the ratio of the sum of the radius of curvature of the first side surface of the second lens and the radius of curvature of the second side surface of the second lens to the sum of the inner diameter of the first side surface of the first spacer element and the outer diameter of the first side surface of the first spacer element within the range, the maximum profile of the lens barrel can be limited, the compactness of the lens structure can be facilitated, the off-axis aberration can be corrected, and the overall image quality of the system can be improved.
In an exemplary embodiment, the vision system of the present application may satisfy the condition 5< (D0 s-D0 s)/EPD <6, where D0s is the outer diameter of the first side end surface of the barrel (i.e., the end surface or surface of the barrel closest to the first side), D0s is the inner diameter of the first side end surface of the barrel, and EPD is the entrance pupil diameter of the vision system. By controlling the ratio of the difference between the outer diameter of the first side end surface of the lens barrel and the inner diameter of the first side end surface of the lens barrel to the entrance pupil diameter of the visual system within the range, the diameter of the lens barrel and the diameter of the lens are maintained in a certain proportion, and the uniform wall thickness of the lens barrel is beneficial to stabilizing the reliability of the lens.
In an exemplary embodiment, the vision system of the present application may satisfy the condition 3<f/(EP 01+cp 1) <4.5, where f is an effective focal length of the vision system, EP01 is a distance from the first side end surface of the lens barrel to the first side surface of the first spacer element along the optical axis, and CP1 is a maximum thickness of the first spacer element in the optical axis direction or in a direction parallel to the optical axis. By controlling the ratio of the effective focal length of the visual system to the sum of the distance from the first side end surface of the lens barrel to the first side surface of the first spacing element along the optical axis and the maximum thickness of the first spacing element along the optical axis direction in the range, the wall thickness of the end surface of the lens barrel and the mechanical diameter thickness of the first spacing element can be reasonably controlled, and the lens barrel and the lens forming are facilitated.
In an exemplary embodiment, the vision system of the present application may satisfy the conditional expression 19< d1 s/(ct1+ctr+ctq) <22, where d1s is the inner diameter of the first side of the first spacer element, CT1 is the center thickness of the first lens on the optical axis, CTR is the center thickness of the reflective polarizing element on the optical axis, and CTQ is the center thickness of the quarter-wave plate on the optical axis. The ratio of the inner diameter of the first side surface of the first interval element to the sum of the central thickness of the first lens on the optical axis, the central thickness of the reflective polarizing element on the optical axis and the central thickness of the quarter-wave plate on the optical axis is controlled within the range, so that the chromatic aberration of the optical system can be corrected, and the wearing experience of consumers can be improved.
In an exemplary embodiment, the vision system of the present application may satisfy the conditional expression 2.9< d0m/TD <4.9, where d0m is an inner diameter of the second side end surface of the lens barrel (i.e., an end surface or surface of the lens barrel closest to the second side), and TD is an optical axis distance from the first side surface of the first lens to the second side surface of the third lens. By controlling the ratio of the inner diameter of the second side end surface of the lens barrel to the distance on the optical axis between the first side surface of the first lens and the second side surface of the third lens in this range, a compact design of the optical system can be achieved.
In an exemplary embodiment, the vision system of the present application may satisfy the condition 1<L/(CT 1+ct2+ct 3) <2, where L is the distance on the optical axis from the first side end face of the barrel to the second side end face of the barrel, CT1 is the center thickness on the optical axis of the first lens, CT2 is the center thickness on the optical axis of the second lens, and CT3 is the center thickness on the optical axis of the third lens. The ratio of the distance from the first side end face of the lens barrel to the second side end face of the lens barrel on the optical axis to the sum of the central thickness of the first lens on the optical axis, the central thickness of the second lens on the optical axis and the central thickness of the third lens on the optical axis is controlled within the range, so that the compact design of the system is facilitated, the layout of the second lens and the third lens is also facilitated, the tolerance in the assembly process of the second lens and the third lens is reasonably distributed, and the manufacturability of the lens is effectively improved.
In an exemplary embodiment, the vision system of the present application may satisfy the conditional expression 3.5< |r5|/(D0 max-D0 min) <4.5, where R5 is a radius of curvature of the first side of the third lens, D0max is a maximum outer diameter of the lens barrel, and D0min is a minimum inner diameter of the lens barrel. The maximum appearance of the lens barrel can be limited by controlling the curvature radius of the first side surface of the third lens, the maximum outer diameter of the lens barrel and the minimum inner diameter of the lens barrel to meet the condition of 3.5< |R5|/(D0 max-D0 min) <4.5, so that the compactness of the lens structure is realized, the off-axis aberration is corrected, and the overall image quality of the system is improved.
In an exemplary embodiment, the visual system of the present application may satisfy the condition 34< d1 min/(t12+t23) <43, where d1min is the minimum inner diameter of the first spacer element, T12 is the air gap on the optical axis of the first lens and the second lens, i.e., the distance on the optical axis from the second side of the first lens to the first side of the second lens, and T23 is the air gap on the optical axis of the second lens and the third lens, i.e., the distance on the optical axis from the second side of the second lens to the first side of the third lens. By controlling the ratio of the minimum inner diameter of the first spacing element to the sum of the air gaps of the first lens and the second lens on the optical axis and the air gap of the second lens and the third lens on the optical axis within the range, the air gap between the lenses can be compressed as much as possible on the basis of ensuring the overall image quality of the system, thereby reducing the overall size.
In an exemplary embodiment, the visual system of the present application may satisfy the conditional expression 3.5< R1/D1max <12.5, where R1 is the radius of curvature of the first side of the first lens and D1max is the maximum outer diameter of the first spacer element. By controlling the ratio of the curvature radius of the first side surface of the first lens to the maximum outer diameter of the first interval element within the range, the off-axis aberration can be corrected on the basis of limiting the maximum appearance of the lens barrel, and the overall image quality of the system can be improved.
In an exemplary embodiment, the vision system of the present application may satisfy the conditional expression 0.7< |fg2|/(d0m+d0m) <2.2, where FG2 is an effective focal length of the second element group, D0m is an inner diameter of the second side end surface of the lens barrel, and D0m is an outer diameter of the second side end surface of the lens barrel. The effective focal length of the second element group, the inner diameter of the second side end surface of the lens barrel and the outer diameter of the second side end surface of the lens barrel are controlled to meet the condition of 0.7< |FG2|/(d0m+D0m) <2.2, and the shape of the second element group is controlled, so that the reasonable position of the elements is determined, the wall thickness of the lens barrel can be reasonably controlled, and the lens barrel forming is facilitated.
In an exemplary embodiment, the vision system of the present application may satisfy the conditional expression 26< (f/EPD) × (L/EP 01) <41, where f is an effective focal length of the vision system, EPD is an entrance pupil diameter of the vision system, L is a distance on the optical axis from the first side end surface of the lens barrel to the second side end surface of the lens barrel, and EP01 is a distance along the optical axis from the first side end surface of the lens barrel to the first side surface of the first spacer element. The effective focal length of the visual system, the entrance pupil diameter of the visual system, the distance between the first side end surface of the lens barrel and the second side end surface of the lens barrel on the optical axis, and the distance between the first side end surface of the lens barrel and the first side surface of the first spacing element along the optical axis are controlled to meet the condition of 26< (f/EPD) x (L/EP 01) <41, the view angle of the system can be effectively restrained, and the system can meet the characteristic of large view field of the VR lens.
In an exemplary embodiment, the vision system of the present application may include at least one aperture. The diaphragm can restrict the light path and control the intensity of light. The aperture may be provided in a suitable position of the visual system as desired, for example, the aperture may be provided between the first side (the human eye side) and the first lens.
In an exemplary embodiment, the above-described visual system may optionally further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the imaging surface.
According to the visual system of the above embodiment of the present application, by providing a first element group and a second element group which are assembled in a lens barrel and sequentially arranged from a first side to a second side along an optical axis, wherein the first element group has positive optical power and includes a first lens, a reflective polarizing element, a quarter-wave plate, and a second lens; the second element group has negative focal power and comprises a third lens; and a first spacing element is arranged between the first lens and the second lens; meanwhile, the effective focal length FG1 of the first element group, the effective focal length FG2 of the second element group, the inner diameter D1m of the second side surface of the first spacing element, and the outer diameter D1m of the second side surface of the first spacing element are controlled to satisfy the condition 0.5< |fg1+fg2|/(d1m+d1m) <2.5. This kind of setting of visual system that this application disclosed can restrict the appearance of first lens, second lens and third lens, satisfies the support of first interval element to first lens and second lens structure, is favorable to realizing the compactibility of lens structure and improves the machinability.
Specific examples of visual systems applicable to the above embodiments are further described below with reference to the accompanying drawings.
Example 1
The following describes a visual system according to embodiment 1 of the present application with reference to fig. 2, 3, 4, and 5, 6, and 7. Fig. 2, 3 and 4 show schematic structural views of the visual system according to example 1 of the present application in three different embodiments (embodiment 1-1, embodiment 1-2, embodiment 1-3), respectively.
As shown in fig. 2, 3 and 4, the visual system includes a lens barrel P0 and a lens assembly mounted in the lens barrel P0, arranged in order from a first side (human eye side) to a second side (display side) along an optical axis: a first lens E1, a reflective polarizing element RP, a quarter wave plate QWP, a second lens E2, and a third lens E3; the vision system also includes an image plane IMG.
In this embodiment, the first lens E1, the reflective polarizing element RP, the quarter-wave plate QWP, and the second lens E2 may constitute a first element group, and in particular, a first side surface (surface near the human eye side, surface far the display side) of the reflective polarizing element RP may be attached to a second side surface (surface near the display side, surface far the human eye side) of the first lens E1, and a first side surface (surface near the human eye side, surface far the display side) of the quarter-wave plate QWP may be attached to a second side surface (surface near the display side, surface far the human eye side) of the reflective polarizing element RP. The first element group has positive optical power.
In this embodiment, the second element group includes a third lens E3. The second element group has a negative optical power.
In this embodiment, the visualization system further comprises: a first spacing element P1 located between the first lens E1 and the second lens E2.
Table 1 shows the basic parameters of the visual system of example 1, wherein the radius of curvature and the thickness/distance are both in millimeters (mm).
| Surface of the body | Surface type | Radius of curvature | Thickness of (L) | Refractive index | Abbe number | Refraction/reflection | Coefficient of taper |
| S0 | Spherical surface | Infinity is provided | Infinity is provided | Refraction by refraction | |||
| S1 | Spherical surface | Infinity is provided | 15.0000 | Refraction by refraction | |||
| S2 | Aspherical surface | 795.0596 | 2.4928 | 1.54 | 56.00 | Refraction by refraction | 0.0000 |
| S3 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S4 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S5 | Spherical surface | Infinity is provided | 1.2410 | Refraction by refraction | |||
| S6 | Aspherical surface | 187.2437 | 8.7654 | 1.54 | 56.00 | Refraction by refraction | 0.0000 |
| S7 | Aspherical surface | -94.3088 | 0.1000 | Refraction by refraction | 0.0000 | ||
| S8 | Aspherical surface | -144.1146 | -0.1000 | Reflection of | |||
| S9 | Aspherical surface | -94.3088 | -8.7654 | 1.54 | 56.00 | Refraction by refraction | |
| S10 | Aspherical surface | 187.2437 | -1.2410 | Refraction by refraction | |||
| S11 | Spherical surface | Infinity is provided | -0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S12 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Reflection of | |
| S13 | Spherical surface | Infinity is provided | 1.2410 | Refraction by refraction | |||
| S14 | Aspherical surface | 187.2437 | 8.7654 | 1.54 | 56.00 | Refraction by refraction | |
| S15 | Aspherical surface | -94.3088 | 0.1000 | Refraction by refraction | |||
| S16 | Aspherical surface | -144.1146 | 2.0000 | 1.67 | 19.00 | Refraction by refraction | 0.0000 |
| S17 | Aspherical surface | 128.4419 | 14.9474 | Refraction by refraction | 0.0000 | ||
| S18 | Spherical surface | Infinity is provided | 0.0000 | Refraction by refraction |
TABLE 1
In embodiment 1, the system has a plurality of aspheric surfaces, such as S2, S6-S7, S16-S17, etc., each aspheric profile x can be defined using, but not limited to, the following aspheric formulas:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher order coefficients A that can be used for the respective aspheres S2, S6-S7 and S16-S17 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
| Coefficient/surface | S2 | S6 | S7 | S16 | S17 |
| A4 | -4.3400E-01 | 3.5666E-01 | -3.4261E-01 | 6.9852E-02 | -4.2046E-01 |
| A6 | -5.4896E-02 | 6.7961E-02 | -1.6962E-01 | 7.3732E-02 | -1.9244E-01 |
| A8 | -2.4334E-02 | -1.1773E-01 | 4.4101E-02 | -9.4793E-02 | 4.3678E-02 |
| A10 | -5.0205E-03 | -4.9654E-03 | -4.8952E-02 | 3.3669E-02 | -7.6622E-03 |
| A12 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A14 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A16 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A18 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A20 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
TABLE 2
The relevant parameter values in this embodiment are shown in table 7, in combination with fig. 2, 3, 4 and 1, respectively, wherein d1s is the inner diameter of the first side of the first spacer element P1; d1m is the inner diameter of the second side of the first spacer element P1; d1s is the outer diameter of the first side of the first spacer element P1; d1m is the outer diameter of the second side of the first spacer element P1; d0s is the inner diameter of the first side end face of the lens barrel P0; d0m is the inner diameter of the second side end surface of the lens barrel P0; d0s is the outer diameter of the first side end surface of the lens barrel P0; d0m is the outer diameter of the second side end face of the lens barrel P0; EP01 is a distance along the optical axis from the first side end surface of the lens barrel P0 to the first side surface of the first interval element P1; CP1 is the maximum thickness of the first spacer element P1 in the optical axis direction; l is the distance from the first side end surface of the lens barrel P0 to the second side end surface of the lens barrel P0 along the optical axis; d0min is the minimum inner diameter of the lens barrel P0; d0max is the maximum outer diameter of the lens barrel P0; d1min is the minimum inner diameter of the first spacer element P1; and D1max is the maximum outer diameter of the first spacer element P1. The unit of each of the above parameters shown in Table 7 is millimeter (mm).
Fig. 5 shows on-axis chromatic aberration curves for the vision system of example 1, which represent the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6 shows astigmatism curves for the visual system of example 1, which represent meridional and sagittal image surface curvature. Fig. 7 shows distortion curves for the visual system of example 1, which represent distortion magnitude values for different field angles. As can be seen from fig. 5 to 7, the visual system according to embodiment 1 can achieve good imaging quality.
Example 2
A visual system according to embodiment 2 of the present application is described below with reference to fig. 8, 9, 10, and 11, 12, and 13. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 8, 9 and 10 show schematic structural views of the visual system according to example 2 of the present application in three different embodiments (embodiment 2-1, embodiment 2-2, embodiment 2-3), respectively.
As shown in fig. 8, 9, and 10, the visual system includes a lens barrel P0 and a lens assembly mounted in the lens barrel P0, arranged in order from a first side (human eye side) to a second side (display side) along an optical axis: a first lens E1, a reflective polarizing element RP, a quarter wave plate QWP, a second lens E2, and a third lens E3; the vision system also includes an image plane IMG.
In this embodiment, the first lens E1, the reflective polarizing element RP, the quarter-wave plate QWP, and the second lens E2 may constitute a first element group, and in particular, a first side surface (surface near the human eye side, surface far the display side) of the reflective polarizing element RP may be attached to a second side surface (surface near the display side, surface far the human eye side) of the first lens E1, and a first side surface (surface near the human eye side, surface far the display side) of the quarter-wave plate QWP may be attached to a second side surface (surface near the display side, surface far the human eye side) of the reflective polarizing element RP. The first element group has positive optical power.
In this embodiment, the second element group includes a third lens E3. The second element group has a negative optical power.
In this embodiment, the visualization system further comprises: a first spacing element P1 located between the first lens E1 and the second lens E2.
Table 3 shows the basic parameters of the visual system of example 2, wherein the radius of curvature and the thickness/distance are both in millimeters (mm). In this embodiment, the system has a plurality of aspheric surfaces, such as S2, S6-S7 and S16-S17,table 4 shows the higher order coefficients A for the aspheres S2, S6-S7 and S16-S17 that can be used in example 2 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
| Surface of the body | Surface type | Radius of curvature | Thickness of (L) | Refractive index | Abbe number | Refraction/reflection | Coefficient of taper |
| S0 | Spherical surface | Infinity is provided | Infinity is provided | Refraction by refraction | |||
| S1 | Spherical surface | Infinity is provided | 15.0000 | Refraction by refraction | |||
| S2 | Aspherical surface | 254.6333 | 2.8942 | 1.54 | 56.00 | Refraction by refraction | 0.0000 |
| S3 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S4 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S5 | Spherical surface | Infinity is provided | 1.1970 | Refraction by refraction | |||
| S6 | Aspherical surface | 276.5146 | 14.2800 | 1.54 | 56.00 | Refraction by refraction | 0.0000 |
| S7 | Aspherical surface | -95.1118 | 0.1000 | Refraction by refraction | 0.0000 | ||
| S8 | Aspherical surface | -138.3532 | -0.1000 | Reflection of | |||
| S9 | Aspherical surface | -95.1118 | -14.2800 | 1.54 | 56.00 | Refraction by refraction | |
| S10 | Aspherical surface | 276.5146 | -1.1970 | Refraction by refraction | |||
| S11 | Spherical surface | Infinity is provided | -0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S12 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Reflection of | |
| S13 | Spherical surface | Infinity is provided | 1.1970 | Refraction by refraction | |||
| S14 | Aspherical surface | 276.5146 | 14.2800 | 1.54 | 56.00 | Refraction by refraction | |
| S15 | Aspherical surface | -95.1118 | 0.1000 | Refraction by refraction | |||
| S16 | Aspherical surface | -138.3532 | 4.8248 | 1.67 | 19.00 | Refraction by refraction | 0.0000 |
| S17 | Aspherical surface | 374.0444 | 6.2593 | Refraction by refraction | 0.0000 | ||
| S18 | Spherical surface | Infinity is provided | 0.0000 | Refraction by refraction |
TABLE 3 Table 3
| Coefficient/surface | S2 | S6 | S7 | S16 | S17 |
| A4 | -3.2322E-01 | 3.4622E-01 | -3.1006E-01 | 8.0621E-02 | -2.9268E-01 |
| A6 | -1.5510E-02 | 7.4402E-02 | -8.6134E-02 | 1.0801E-02 | -4.0317E-01 |
| A8 | -1.4942E-02 | -4.2540E-02 | 1.3720E-01 | -6.4907E-02 | 8.5275E-02 |
| A10 | -2.0747E-03 | -8.3050E-03 | -5.3703E-02 | 2.0828E-02 | -5.0634E-03 |
| A12 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A14 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A16 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A18 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A20 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
TABLE 4 Table 4
The values of the relevant parameters in example 2 are shown in Table 7, respectively, wherein the meanings of the parameters are as described above, and the description thereof will not be repeated, and the units of the parameters shown in Table 7 are millimeters (mm).
Fig. 11 shows on-axis chromatic aberration curves for the vision system of example 2, which represent the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12 shows astigmatism curves for the visual system of example 2, which represent meridional image surface curvature and sagittal image surface curvature. Fig. 13 shows distortion curves of the visual system of example 2, which represent distortion magnitude values corresponding to different angles of view. As can be seen from fig. 11 to 13, the visual system according to embodiment 2 can achieve good imaging quality.
Example 3
The following describes a visual system according to embodiment 3 of the present application with reference to fig. 14, 15, 16, and 17, 18, and 19. Fig. 14, 15 and 16 show schematic structural views of the visual system according to example 3 of the present application in three different embodiments (embodiment 3-1, embodiment 3-2, embodiment 3-3), respectively.
As shown in fig. 14, 15, and 16, the visual system includes a lens barrel P0 and a lens assembly mounted in the lens barrel P0, arranged in order from a first side (human eye side) to a second side (display side) along an optical axis: a first lens E1, a reflective polarizing element RP, a quarter wave plate QWP, a second lens E2, and a third lens E3; the vision system also includes an image plane IMG.
In this embodiment, the first lens E1, the reflective polarizing element RP, the quarter-wave plate QWP, and the second lens E2 may constitute a first element group, and in particular, a first side surface (surface near the human eye side, surface far the display side) of the reflective polarizing element RP may be attached to a second side surface (surface near the display side, surface far the human eye side) of the first lens E1, and a first side surface (surface near the human eye side, surface far the display side) of the quarter-wave plate QWP may be attached to a second side surface (surface near the display side, surface far the human eye side) of the reflective polarizing element RP. The first element group has positive optical power.
In this embodiment, the second element group includes a third lens E3. The second element group has a negative optical power.
In this embodiment, the visualization system further comprises: a first spacing element P1 located between the first lens E1 and the second lens E2.
Table 5 shows the basic parameters of the visual system of example 3, wherein the radius of curvature and the thickness/distance are both in millimeters (mm). In this example, the system has a plurality of aspherical surfaces such as S2, S6-S7, and S16-S17, and the higher order coefficients A for the aspherical surfaces S2, S6-S7, and S16-S17 that can be used in example 3 are shown in Table 6 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
| Surface of the body | Surface type | Radius of curvature | Thickness of (L) | Refractive index | Abbe number | Refraction/reflection | Coefficient of taper |
| S0 | Spherical surface | Infinity is provided | Infinity is provided | Refraction by refraction | |||
| S1 | Spherical surface | Infinity is provided | 15.0000 | Refraction by refraction | |||
| S2 | Aspherical surface | 251.1249 | 2.8137 | 1.54 | 56.00 | Refraction by refraction | 0.0000 |
| S3 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S4 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S5 | Spherical surface | Infinity is provided | 0.9786 | Refraction by refraction | |||
| S6 | Aspherical surface | 322.8911 | 15.7317 | 1.54 | 56.00 | Refraction by refraction | 0.0000 |
| S7 | Aspherical surface | -94.1298 | 0.1543 | Refraction by refraction | 0.0000 | ||
| S8 | Aspherical surface | -134.2108 | -0.1543 | Reflection of | |||
| S9 | Aspherical surface | -94.1298 | -15.7317 | 1.54 | 56.00 | Refraction by refraction | |
| S10 | Aspherical surface | 322.8911 | -0.9786 | Refraction by refraction | |||
| S11 | Spherical surface | Infinity is provided | -0.2000 | 1.50 | 57.00 | Refraction by refraction | |
| S12 | Spherical surface | Infinity is provided | 0.2000 | 1.50 | 57.00 | Reflection of | |
| S13 | Spherical surface | Infinity is provided | 0.9786 | Refraction by refraction | |||
| S14 | Aspherical surface | 322.8911 | 15.7317 | 1.54 | 56.00 | Refraction by refraction | |
| S15 | Aspherical surface | -94.1298 | 0.1543 | Refraction by refraction | |||
| S16 | Aspherical surface | -134.2108 | 5.3178 | 1.67 | 19.00 | Refraction by refraction | 0.0000 |
| S17 | Aspherical surface | -6098.8343 | 4.4574 | Refraction by refraction | 0.0000 | ||
| S18 | Spherical surface | Infinity is provided | 0.0000 | Refraction by refraction |
TABLE 5
| Coefficient/surface | S2 | S6 | S7 | S16 | S17 |
| A4 | -3.0080E-01 | 3.6982E-01 | -3.0802E-01 | 8.2294E-02 | -1.3435E-01 |
| A6 | -1.1303E-02 | 4.3705E-03 | -1.3355E-01 | 3.8213E-03 | -3.7569E-01 |
| A8 | -2.1150E-02 | 2.8420E-03 | 1.5724E-01 | -5.5203E-02 | 1.1670E-01 |
| A10 | 1.5462E-04 | -1.5506E-02 | -4.4261E-02 | 1.3099E-02 | -3.7180E-02 |
| A12 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A14 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A16 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A18 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| A20 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
TABLE 6
The values of the relevant parameters in example 3 are shown in Table 7, respectively, wherein the meanings of the parameters are as described above, and the description thereof will not be repeated, and the units of the parameters shown in Table 7 are millimeters (mm).
Fig. 17 shows on-axis chromatic aberration curves for the vision system of example 3, which represent the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 18 shows astigmatism curves for the visual system of example 3, which represent meridional image surface curvature and sagittal image surface curvature. Fig. 19 shows distortion curves of the visual system of example 3, which represent distortion magnitude values corresponding to different angles of view. As can be seen from fig. 17 to 19, the visual system according to embodiment 3 can achieve good imaging quality.
| Parameters/embodiments | 1-1 | 1-2 | 1-3 | 2-1 | 2-2 | 2-3 | 3-1 | 3-2 | 3-3 |
| d1s | 61.7251 | 61.2751 | 61.3751 | 65.4496 | 65.7996 | 66.0996 | 65.5014 | 66.0114 | 65.8114 |
| d1m | 63.2021 | 62.7521 | 62.8521 | 66.9067 | 68.5907 | 67.5567 | 66.5687 | 67.0787 | 66.8787 |
| D1s | 65.2817 | 64.8317 | 64.9317 | 68.9864 | 69.3364 | 69.6364 | 69.0382 | 69.5482 | 69.3482 |
| D1m | 65.8700 | 65.4200 | 65.5200 | 69.5747 | 69.9247 | 70.2247 | 69.6265 | 70.1365 | 69.9365 |
| d0s | 46.4674 | 46.4674 | 46.4674 | 50.1720 | 50.1720 | 50.1720 | 50.2239 | 50.2239 | 50.2239 |
| d0m | 72.3437 | 71.8937 | 71.9937 | 76.0483 | 76.3983 | 76.6983 | 76.1001 | 76.6101 | 76.4101 |
| D0s | 73.6719 | 73.1624 | 73.2445 | 77.3766 | 77.7266 | 78.0266 | 77.4284 | 77.9384 | 77.7384 |
| D0m | 77.5613 | 77.1113 | 77.2113 | 81.2660 | 81.6160 | 81.9160 | 81.3178 | 81.8278 | 81.6278 |
| EP01 | 4.8852 | 5.3852 | 5.5352 | 4.3889 | 4.3889 | 4.3889 | 4.2891 | 4.2891 | 4.2891 |
| CP1 | 3.9305 | 3.9305 | 3.9305 | 3.2159 | 3.2159 | 3.2159 | 2.7917 | 2.7917 | 2.7917 |
| L | 23.7234 | 24.2234 | 24.3734 | 28.3725 | 28.3725 | 28.3725 | 28.3725 | 28.3725 | 28.3725 |
| d0min | 44.3559 | 44.3559 | 44.3559 | 48.0605 | 48.0605 | 48.0605 | 48.1123 | 48.1123 | 48.1123 |
| D0max | 79.0000 | 78.5500 | 78.6500 | 82.7046 | 83.0546 | 83.3546 | 82.7565 | 83.2665 | 83.0665 |
| d1min | 61.2110 | 60.7610 | 60.8610 | 64.9156 | 65.2656 | 65.5656 | 64.9675 | 65.4775 | 65.2775 |
| D1max | 66.6000 | 66.1500 | 66.2500 | 70.3046 | 70.6546 | 70.9546 | 70.3565 | 70.8665 | 70.6665 |
TABLE 7
Further, in examples 1 to 3, the effective focal length FG1 of the first element group, the effective focal length FG2 of the second element group, the effective focal length f of the visual system, the entrance pupil diameter EPD of the visual system, the distance TD along the optical axis between the first side surface of the first lens and the second side surface of the third lens, the center thickness CTR of the reflective polarizing element on the optical axis, and the center thickness CTQ of the quarter-wave plate on the optical axis are shown in table 8.
TABLE 8
Examples 1 to 3 each satisfy the conditions shown in table 9.
| Condition/example | 1-1 | 1-2 | 1-3 | 2-1 | 2-2 | 2-3 | 3-1 | 3-2 | 3-3 |
| |FG1+FG2|/(d1m+D1m) | 0.72 | 0.72 | 0.72 | 1.37 | 1.35 | 1.36 | 2.12 | 2.10 | 2.11 |
| (R3+R4)/(d1s+D1s) | 0.73 | 0.74 | 0.74 | 1.35 | 1.34 | 1.34 | 1.70 | 1.69 | 1.69 |
| (D0s-d0s)/EPD | 5.44 | 5.34 | 5.36 | 5.44 | 5.51 | 5.57 | 5.44 | 5.54 | 5.50 |
| f/(EP01+CP1) | 3.42 | 3.24 | 3.19 | 4.00 | 4.00 | 4.00 | 4.30 | 4.30 | 4.30 |
| d1s/(CT1+CTR+CTQ) | 21.34 | 21.18 | 21.22 | 19.87 | 19.97 | 20.07 | 20.38 | 20.54 | 20.48 |
| d0m/TD | 4.82 | 4.79 | 4.80 | 3.21 | 3.22 | 3.24 | 3.00 | 3.02 | 3.01 |
| L/(CT1+CT2+CT3) | 1.79 | 1.83 | 1.84 | 1.29 | 1.29 | 1.29 | 1.19 | 1.19 | 1.19 |
| |R5|/(D0max-d0min) | 4.16 | 4.21 | 4.20 | 3.99 | 3.95 | 3.92 | 3.87 | 3.82 | 3.84 |
| d1min/(T12+T23) | 35.16 | 34.90 | 34.96 | 38.25 | 38.46 | 38.64 | 42.38 | 42.72 | 42.59 |
| R1/D1max | 11.94 | 12.02 | 12.00 | 3.62 | 3.60 | 3.59 | 3.57 | 3.54 | 3.55 |
| |FG2|/(d0m+D0m) | 0.79 | 0.80 | 0.80 | 1.37 | 1.37 | 1.36 | 2.02 | 2.01 | 2.01 |
| (f/EPD)×(L/EP01) | 29.31 | 27.15 | 26.58 | 39.36 | 39.36 | 39.36 | 40.31 | 40.31 | 40.31 |
TABLE 9
The present application also provides an imaging device provided with an electron-sensitive element for imaging, which may be a photosensitive coupling element (Charge Coupled Device, CCD) or a complementary metal oxide semiconductor element (Complementary Metal Oxide Semiconductor, CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the above-described visual system.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It should be understood by those skilled in the art that the scope of protection referred to in this application is not limited to the specific combination of the above technical features, but also encompasses other technical solutions formed by any combination of the above technical features or their equivalents without departing from the spirit of the application. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (13)
1. The visual system is characterized by comprising a lens barrel, a first element group and a second element group which are assembled in the lens barrel and are sequentially arranged from a first side to a second side along an optical axis, wherein,
the first element group has positive focal power and comprises a first lens, a reflective polarizing element, a quarter wave plate and a second lens;
the second element group has negative optical power and comprises a third lens;
a first spacing element is arranged between the first lens and the second lens;
the visual system satisfies:
0.5<|FG1+FG2|/(d1m+D1m)<2.5，
where FG1 is the effective focal length of the first element group, FG2 is the effective focal length of the second element group, D1m is the inner diameter of the second side of the first spacing element, and D1m is the outer diameter of the second side of the first spacing element.
2. The visual system of claim 1, wherein a radius of curvature R3 of the first side of the second lens, a radius of curvature R4 of the second side of the second lens, an inner diameter D1s of the first side of the first spacer element, and an outer diameter D1s of the first side of the first spacer element satisfy:
0.6<(R3+R4)/(d1s+D1s)<1.8。
3. the visualization system of claim 1, wherein an outer diameter D0s of the first side end surface of the barrel, an inner diameter D0s of the first side end surface of the barrel, and an entrance pupil diameter EPD of the visualization system satisfy:
5<(D0s-d0s)/EPD<6。
4. the visual system according to claim 1, wherein an effective focal length f of the visual system, a distance EP01 from a first side end surface of the lens barrel to a first side surface of the first spacer element along the optical axis, and a maximum thickness CP1 of the first spacer element along the optical axis direction satisfy:
3<f/(EP01+CP1)<4.5。
5. the visual system of claim 1, wherein an inner diameter d1s of the first side of the first spacer element, a center thickness CT1 of the first lens on the optical axis, a center thickness CTR of the reflective polarizing element on the optical axis, and a center thickness CTQ of the quarter-wave plate on the optical axis satisfy:
19<d1s/(CT1+CTR+CTQ)<22。
6. the visual system according to claim 1, wherein an inner diameter d0m of the second side end surface of the lens barrel and a distance TD on the optical axis between the first side surface of the first lens and the second side surface of the third lens satisfy:
2.9<d0m/TD<4.9。
7. the visual system according to any one of claims 1 to 6, wherein a distance L on the optical axis from a first side end face of the lens barrel to a second side end face of the lens barrel, a center thickness CT1 on the optical axis of the first lens, a center thickness CT2 on the optical axis of the second lens, and a center thickness CT3 on the optical axis of the third lens satisfy:
1<L/(CT1+CT2+CT3)<2。
8. the visualization system of any of claims 1-6, wherein the radius of curvature R5 of the first side of the third lens and the maximum outer diameter D0max of the barrel and the minimum inner diameter D0min of the barrel satisfy:
3.5<|R5|/(D0max-d0min)<4.5。
9. the visual system according to any one of claims 1 to 6, wherein a minimum inner diameter d1min of the first spacer element, a distance T12 on the optical axis from the second side of the first lens to the first side of the second lens, and a distance T23 on the optical axis from the second side of the second lens to the first side of the third lens satisfy:
34<d1min/(T12+T23)<43。
10. the visual system of any one of claims 1 to 6 wherein a radius of curvature R1 of the first side of the first lens and a maximum outer diameter D1max of the first spacer element satisfy:
3.5<R1/D1max<12.5。
11. the visual system according to any one of claims 1 to 6, wherein an inner diameter D0m of the second side end surface of the lens barrel and an outer diameter D0m of the second side end surface of the lens barrel satisfy:
0.7<|FG2|/(d0m+D0m)<2.2。
12. the visual system according to any one of claims 1 to 6, wherein an effective focal length f of the visual system, an entrance pupil diameter EPD of the visual system, a distance L on the optical axis from a first side end surface of the lens barrel to a second side end surface of the lens barrel, and a distance EP01 along the optical axis from the first side end surface of the lens barrel to the first side surface of the first spacer element satisfy:
26<(f/EPD)×(L/EP01)<41。
13. a VR device comprising the visual system of any one of claims 1 to 12, wherein the first side is a human eye side and the second side is a display side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321427644.XU CN220438661U (en) | 2023-06-06 | 2023-06-06 | Visual system and VR equipment comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202321427644.XU CN220438661U (en) | 2023-06-06 | 2023-06-06 | Visual system and VR equipment comprising same |
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