CN115079381B - VR glasses detection lens - Google Patents

VR glasses detection lens Download PDF

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Publication number
CN115079381B
CN115079381B CN202210874119.6A CN202210874119A CN115079381B CN 115079381 B CN115079381 B CN 115079381B CN 202210874119 A CN202210874119 A CN 202210874119A CN 115079381 B CN115079381 B CN 115079381B
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lens
group
focal length
effective focal
glasses
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CN115079381A (en
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章彬炜
张力瑶
曾昊杰
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Jiangxi Lianyi Optics Co Ltd
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Jiangxi Lianyi Optics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0081—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. enlarging, the entrance or exit pupil

Abstract

The invention discloses a VR glasses detection lens, which comprises the following components in sequence from an object side to an imaging surface along an optical axis: a diaphragm; a first group having positive optical power; a second group having positive optical power; a third group having a negative optical power; a fourth group having positive optical power; each group comprising at least one lens; the VR glasses detection lens satisfies the following conditional expressions: -6<fQ1/f<‑3；‑30<fQ2/f<‑5；0<fQ3/f<300；‑6<fQ4/f<0; wherein f represents the effective focal length of the VR glasses detection lens, fQ1Representing the effective focal length of the first group, fQ2Representing the effective focal length of the second group, fQ3Denotes the effective focal length of the third group, fQ4Representing the effective focal length of the fourth group. The VR glasses detection lens has high resolution and a large field angle, and can well simulate human eye observation.

Description

VR glasses detection lens
Technical Field
The invention relates to the technical field of optical lenses, in particular to a VR (virtual reality) glasses detection lens.
Background
In the 4G era, problems of poor user experience, low computing capacity, obvious heaviness and the like exist in VR technology and application development, and the commercial application and market development of VR are hindered.
In recent years, with the application development of the 5G technology, the VR industry has rapidly developed, and has been widely used in many fields such as games, social interaction, education, and medical care.
However, with the continuous development of VR technology and application, in order to enable VR to have better use experience in each field, imaging requirements for VR equipment on the market are also continuously improved, and certain requirements are provided for VR glasses detection lenses.
Disclosure of Invention
Therefore, the invention aims to provide a VR glasses detection lens which has high resolution and large field angle and can well simulate human eye observation.
The embodiment of the invention implements the above object by the following technical scheme.
The invention provides a VR glasses detection lens, which sequentially comprises the following components from an object side to an imaging surface along an optical axis: a diaphragm; a first group having positive optical power; a second group having positive optical power; a third group having a negative optical power; a fourth group having positive optical power; each group comprising at least one lens; the VR glasses detection lens meets the following conditional expression: -6<fQ1/f<-3；-30<fQ2/f<-5；0<fQ3/f<300；-6<fQ4/f<0; wherein f represents the effective focal length of the VR glasses detection lens, fQ1Representing an effective focal length of the first group, fQ2Representing the effective focal length of the second group, fQ3Representing the effective focal length of the third group, fQ4Representing an effective focal length of the fourth group.
Compared with the prior art, the VR glasses detection lens provided by the invention has the advantages that through reasonable collocation of the focal powers of the four lens groups, the lens has the visual angle close to human eyes, the size of the pupil is equivalent to that of the human eyes, and the lens has higher resolution and larger visual angle, so that the experience of people when using VR glasses can be well simulated, and the observation effect suitable for the human eyes can be better corrected.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a VR glasses detection lens in a first embodiment of the present invention;
FIG. 2 is a graph of on-axis spherical aberration and aberration of VR glasses lens according to the first embodiment of the present invention;
fig. 3 is a field curvature graph of a VR glasses detection lens in a first embodiment of the present invention;
fig. 4 is a graph showing f-tan θ distortion of a VR glasses inspection lens in a first embodiment of the present invention;
fig. 5 is a contrast curve of the VR glasses detection lens in the first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a VR glasses detection lens in a second embodiment of the present invention;
FIG. 7 is a graph of on-axis spherical aberration of VR glasses with a second embodiment of the present invention;
fig. 8 is a field curvature graph of a VR glasses detection lens in a second embodiment of the present invention;
FIG. 9 is a graph showing the f-tan θ distortion of VR glasses inspection lenses according to a second embodiment of the present invention;
fig. 10 is a comparative plot of VR glasses detection lenses in a second embodiment of the present invention;
fig. 11 is a schematic structural diagram of a VR glasses detection lens in a third embodiment of the present invention;
fig. 12 is a graph of on-axis spherical aberration of VR glasses detection lens in a third embodiment of the present invention;
fig. 13 is a field curvature graph of a VR glasses detection lens in a third embodiment of the present invention;
fig. 14 is a graph showing f-tan θ distortion of VR glasses inspection lenses according to a third embodiment of the present invention;
fig. 15 is a contrast curve of the VR glasses detection lens in the third embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Like reference numerals refer to like elements throughout the specification.
The invention provides a VR glasses detection lens, which sequentially comprises the following components from an object side to an imaging surface along an optical axis: the diaphragm, the first group, the second group, the third group and the fourth group.
The diaphragm sets up at the camera lens foremost, can simulate the position of people's eye in the VR glasses better to the information in the whole field of view of collection that does not have the sheltering from.
In particular, the first group has a positive optical power, the second group has a positive optical power, the third group has a negative optical power, and the fourth group has a positive optical power.
In some embodiments, the VR glasses detection lens includes sixteen lenses; the first group comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an imaging surface along an optical axis in sequence; the second group comprises a fifth lens, a sixth lens, a seventh lens and an eighth lens from the object side to the imaging surface along the optical axis in sequence; the third group comprises a ninth lens, a tenth lens, an eleventh lens and a twelfth lens in sequence from the object side to the imaging surface along the optical axis; the fourth group includes a thirteenth lens, a fourteenth lens, a fifteenth lens, and a sixteenth lens in order from the object side to the image plane along the optical axis.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
-6<fQ1/f<-3；
-30<fQ2/f<-5；
0<fQ3/f<300；
-6<fQ4/f<0；
wherein f represents the effective focal length of the VR glasses detection lens, fQ1Representing an effective focal length, f, of the first groupQ2Representing the effective focal length of the second group, fQ3Representing the effective focal length of the third group, fQ4Representing an effective focal length of the fourth group. The lens can be kept fixed by reasonably matching the effective focal lengths of all the groups according to the condition formulaThe pupil diameter ensures that the lens has a field angle close to human eyes and has higher relative illumination at the same time, thereby better simulating the visual experience of human eyes.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
-0.9<f1/fQ1< 0；
0.5<f2/fQ1<1.5；
2.0<f3/fQ1< 3.5；
3.0<f4/fQ1<4.9；
wherein f1 represents an effective focal length of the first lens, f2 represents an effective focal length of the second lens, f3 represents an effective focal length of the third lens, f4 represents an effective focal length of the fourth lens, fQ1Representing an effective focal length of the first group. Satisfy above-mentioned conditional expression, through the effective focus of each lens in the first group of rational configuration, help strengthening the coma of the off-axis visual field and correct, fine convergence field curvature promotes the imaging quality simultaneously.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
0<f5/fQ2<1.5；
-1.5<f6/fQ2<-0.5；
1.4<f7/fQ2<2.8；
1.1<f8/fQ2<1.5；
wherein f5 denotes an effective focal length of the fifth lens, f6 denotes an effective focal length of the sixth lens, f7 denotes an effective focal length of the seventh lens, f8 denotes an effective focal length of the eighth lens, fQ2Representing an effective focal length of the second group. The method meets the conditional expression, and can well correct the curvature of field of the lens by reasonably configuring the effective focal length of each lens in the second group, so that the curvature of field of the lens is kept at a small level.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
0<f9/fQ3< 1.2；
-2.0<f10/fQ3<0；
-1<f11/fQ3<0；
0<f12/fQ3<0.5;
where f9 denotes an effective focal length of the ninth lens, f10 denotes an effective focal length of the tenth lens, f11 denotes an effective focal length of the eleventh lens, f12 denotes an effective focal length of the twelfth lens, fQ3Representing an effective focal length of the third group. Satisfy above-mentioned conditional expression, can rationally control the effective focal length of each lens in the third group, be favorable to proofreaying and correct the senior aberration of VR glasses detection lens.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
4.0<f13/fQ4<5.0；
2.0<f14/fQ4<3.1；
0<f15/fQ4<3.0；
-4.5<f16/fQ4< 0；
wherein f13 denotes an effective focal length of the thirteenth lens, f14 denotes an effective focal length of the fourteenth lens, f15 denotes an effective focal length of the fifteenth lens, f16 denotes an effective focal length of the sixteenth lens, and fQ4Representing an effective focal length of the fourth group. Satisfy above-mentioned conditional expression, effective focus through each lens in the reasonable collocation fourth group is favorable to reducing the correction degree of difficulty of senior aberration, promotes the illuminance of camera lens simultaneously, guarantees that the camera lens still can exert its effect under darker environment.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
1.0<CT8/CT10<1.6；
wherein CT8 denotes a center thickness of the eighth lens, and CT10 denotes a center thickness of the tenth lens. The method meets the condition formula, can well correct the spherical aberration on the shaft, enables the lens collocation to be more uniform, and is more beneficial to forming.
In some embodiments, the VR glasses detection lens comprises four cemented lensesAnd the aberration of the system can be better corrected, and the imaging quality is more excellent. Specifically, the first lens and the second lens form a first cemented lens group, and the effective focal length f of the first cemented lens groupJ1Satisfies the following conditions: 75mm < | fJ1Less than 330mm; the fifth lens and the sixth lens form a second cemented lens group, and the effective focal length f of the second cemented lens groupJ2Satisfies the following conditions: 250mm < | fJ2The | < 1310mm; the eleventh lens and the twelfth lens form a third cemented lens group, and the effective focal length f of the third cemented lens groupJ3Satisfies the following conditions: -170mm < fJ3< -80mm; the fifteenth lens and the sixteenth lens form a fourth cemented lens group, and the effective focal length f of the fourth cemented lens groupJ4Satisfies the following conditions: f is more than 95mmJ4＜335mm。
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
-8mm<f<-6mm；
5mm<IH<8mm；
wherein f represents an effective focal length of the VR glasses detection lens, and IH represents a half-image height of the VR glasses detection lens. The condition formula is met, and the lens still has high acquisition brightness under the condition that the lens has a 126-degree field angle under the detection condition by reasonably controlling the effective focal length and the half-image height of the lens.
In some embodiments, the VR glasses detection lens satisfies the following conditional expression:
3mm <EPD<5mm；
FOV≤126°；
wherein, EPD represents an entrance pupil diameter of the VR glasses detection lens, and FOV represents a maximum field angle of the VR glasses detection lens. The conditional expression is satisfied, the lens is ensured to have the entrance pupil diameter similar to that of human eyes and the detection visual angle equivalent to that of the human eyes, and the observation effect of the detection lens simulating the human eyes can be met.
In some embodiments, all lenses in the VR glasses detection lens are spherical lenses, which enables the lens to have higher resolution, so as to better simulate the visual experience of human eyes, and improve the mass-producibility of the lens.
The invention is further illustrated below in the following examples. In various embodiments, the thickness, the curvature radius, and the material selection part of each lens in the VR glasses detection lens are different, and the specific difference can be referred to the parameter table of each embodiment. The following examples are only preferred embodiments of the present invention, but the embodiments of the present invention are not limited only by the following examples, and any other changes, substitutions, combinations or simplifications which do not depart from the innovative points of the present invention should be construed as being equivalent substitutions and shall be included within the scope of the present invention.
First embodiment
Referring to fig. 1, a VR glasses inspection lens 100 according to a first embodiment of the present invention sequentially includes, from an object side to an image plane S29 along an optical axis: a diaphragm ST, a first group Q1, a second group Q2, a third group Q3 and a fourth group Q4.
The first group Q1, the second group Q2 and the fourth group Q4 all have positive focal power, and the third group Q3 has negative focal power.
Further, the first group Q1 includes, in order from the object side to the image plane S29 along the optical axis, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4.
The first lens L1 has negative focal power, the object side surface S1 of the first lens is a concave surface, and the image side surface of the first lens is a plane; the second lens L2 has positive focal power, the object side surface of the second lens is a plane, and the image side surface S3 of the second lens is a convex surface; the first lens L1 and the second lens L2 form a first cemented lens group, the cemented surface of the first cemented lens group is S2, and the combined focal length of the first cemented lens group is-327.66 mm; the third lens L3 has positive focal power, the object side surface S4 of the third lens is a concave surface, and the image side surface S5 of the third lens is a convex surface; the fourth lens element L4 has positive refractive power, and the object-side surface S6 of the fourth lens element is concave and the image-side surface S7 of the fourth lens element is convex.
The second group Q2 includes, in order from the object side to the image plane S29 along the optical axis, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8.
The fifth lens element L5 has positive focal power, the object-side surface S8 of the fifth lens element is a convex surface, and the image-side surface of the fifth lens element is a convex surface; the sixth lens element L6 has negative focal power, the object-side surface of the sixth lens element is concave, and the image-side surface S10 of the sixth lens element is convex; the fifth lens L5 and the sixth lens L6 form a second cemented lens group, the cemented surface of the second cemented lens group is S9, and the combined focal length of the second cemented lens group is-762.81 mm; the seventh lens element L7 has positive refractive power, and the object-side surface S11 and the image-side surface S12 of the seventh lens element are convex, respectively; the eighth lens element L8 has positive refractive power, and the object-side surface S13 and the image-side surface S14 of the eighth lens element are convex, respectively.
The third group Q3 includes, in order from the object side to the imaging surface S29 along the optical axis, a ninth lens L9, a tenth lens L10, an eleventh lens L11, and a twelfth lens L12.
The ninth lens element L9 has negative focal power, the object-side surface S15 of the ninth lens element is concave, and the image-side surface S16 of the ninth lens element is concave; the tenth lens L10 has positive refractive power, and the object-side surface S17 and the image-side surface S18 of the tenth lens are convex surfaces; the eleventh lens L11 has positive focal power, the object-side surface S19 of the eleventh lens is a convex surface, and the image-side surface of the eleventh lens is a convex surface; the twelfth lens L12 has negative focal power, the object-side surface of the twelfth lens is a concave surface, and the image-side surface S21 of the twelfth lens is a concave surface; and the eleventh lens L11 and the twelfth lens L12 form a third cemented lens group, the cemented surface of the third cemented lens group is S20, and the combined focal length of the third cemented lens group is-90.56 mm.
The fourth group Q4 includes, in order from the object side to the imaging surface S29 along the optical axis, a thirteenth lens L13, a fourteenth lens L14, a fifteenth lens L15, and a sixteenth lens L16.
The thirteenth lens element L13 has positive focal power, the object-side surface S22 of the thirteenth lens element is concave, and the image-side surface S23 of the thirteenth lens element is convex; the fourteenth lens element L14 has positive refractive power, and the object-side surface S24 and the image-side surface S25 of the fourteenth lens element are convex surfaces; the fifteenth lens L15 has positive focal power, the object-side surface S26 of the fifteenth lens is a convex surface, and the image-side surface of the fifteenth lens is a concave surface; the sixteenth lens element L16 has negative focal power, and has a convex object-side surface and a concave image-side surface S28; and the fifteenth lens L15 and the sixteenth lens L16 form a fourth cemented lens group, the cemented surface of the fourth cemented lens group is S27, and the combined focal length of the fourth cemented lens group is 99.16mm.
Design parameters of the VR spectacle lens 100 provided in this embodiment are shown in table 1, where R represents a radius of curvature (unit: mm), d represents an optical surface distance (unit: mm), and n representsdRefractive index, V, of the materialdRepresents the abbe number of the material.
TABLE 1
Figure 693136DEST_PATH_IMAGE001
Referring to fig. 2 to 5, fig. 2 is a graph showing on-axis spherical aberration curves, and it can be seen from fig. 2 that the chromatic aberration of all wavelengths is controlled within ± 0.05mm, which indicates that the axial spherical aberration of the lens is well corrected; fig. 3 shows the field curvature of different image heights on the image plane in the meridional direction and the sagittal direction, and as can be seen from fig. 3, the field curvature in the meridional direction and the sagittal direction are both controlled within ± 0.1mm, which indicates that the lens field curvature is well corrected; FIG. 4 shows the f-tan θ distortion of different image heights on the image plane, and it can be seen from FIG. 4 that the distortion of different image heights on the image plane is controlled within + -52%, which indicates that the lens distortion falls within the normal range; fig. 5 shows the illuminance of the dominant wavelength with respect to the center in different fields, and it can be seen from fig. 5 that the illuminance of each field with respect to the center is 70% or more in the imaging field range, indicating that the relative illuminance correction of the lens is high.
Second embodiment
Referring to fig. 6, the VR glasses inspection lens 200 according to the second embodiment of the present invention has a structure substantially the same as that of the above embodiments, and the differences include different lens materials and different curvature radii and thicknesses of the lenses.
The present embodiment provides the parameters related to each lens of the VR glasses detection lens 200 as shown in table 2.
TABLE 2
Figure 947399DEST_PATH_IMAGE002
In the embodiment, the first lens L1 and the second lens L2 form a first cemented lens group, and the combined focal length of the first cemented lens group is 138.78mm; the fifth lens L5 and the sixth lens L6 form a second cemented lens group, and the combined focal length of the second cemented lens group is 1304.13mm; the eleventh lens L11 and the twelfth lens L12 form a third cemented lens group, and the combined focal length of the third cemented lens group is-83.67 mm; the fifteenth lens L15 and the sixteenth lens L16 form a fourth cemented lens group, and the combined focal length of the first cemented lens group is 330.08mm.
Referring to fig. 7 to 10, fig. 7 is a graph showing on-axis spherical aberration curves, and it can be seen from fig. 7 that the chromatic aberration of all wavelengths is controlled within ± 0.06mm, which indicates that the axial spherical aberration of the lens is well corrected; FIG. 8 shows the field curvature of different image heights on the image plane in the tangential direction and the sagittal direction, and it can be seen from FIG. 8 that the field curvature in both the tangential and sagittal directions are controlled within + -0.1 mm, which indicates that the lens field curvature is well corrected; FIG. 9 shows the f-tan θ distortion of different image heights on the image plane, and it can be seen from FIG. 9 that the distortion of different image heights on the image plane is controlled within + -53%, which indicates that the lens distortion falls within the normal range; fig. 10 shows the illuminance of the dominant wavelength with respect to the center in different fields, and it can be seen from fig. 10 that the illuminance of each field with respect to the center is 75% or more in the imaging field range, indicating that the relative illuminance correction of the lens is high.
Third embodiment
Referring to fig. 11, a VR glasses inspection lens 300 according to a third embodiment of the present invention has a structure substantially the same as that of the first embodiment, and the differences include different lens materials and different curvature radii and thicknesses of the lenses.
Table 3 shows relevant parameters of each lens in the VR glasses inspection lens 300 provided in this embodiment.
TABLE 3
Figure 230613DEST_PATH_IMAGE003
In this embodiment, the first lens L1 and the second lens L2 form a first cemented lens group, and the combined focal length of the first cemented lens group is 78.00mm; the fifth lens L5 and the sixth lens L6 form a second cemented lens group, and the combined focal length of the second cemented lens group is 258.97mm; the eleventh lens L11 and the twelfth lens L12 form a third cemented lens group, and the combined focal length of the third cemented lens group is-167.68 mm; the fifteenth lens L15 and the sixteenth lens L16 form a fourth cemented lens group, and the combined focal length of the fourth cemented lens group is 328.49mm.
Referring to fig. 12 to 15, fig. 12 is a graph showing on-axis spherical aberration curves, and it can be seen from fig. 12 that the chromatic aberration of all wavelengths is controlled within ± 0.07mm, which indicates that the axial spherical aberration of the lens is well corrected; fig. 13 shows the field curvature of different image heights on the image plane in the meridional direction and the sagittal direction, and as can be seen from fig. 13, the field curvature in both the meridional direction and the sagittal direction is controlled within ± 0.1mm, which indicates that the lens field curvature is well corrected; FIG. 14 shows the f-tan θ distortion of different image heights on the image plane, and it can be seen from FIG. 14 that the distortion of different image heights on the image plane is controlled within + -51%, which indicates that the lens distortion falls within the normal range; fig. 15 shows the illuminance of the dominant wavelength with respect to the center in different fields, and it can be seen from fig. 15 that the illuminance of each field with respect to the center is 63% or more in the imaging field range, indicating that the relative illuminance correction of the lens is high.
Please refer to tables 4 and 5, which show the optical characteristics of the VR glasses inspection lens provided in the above three embodiments, including the maximum field angle FOV, total optical length TTL, half image height IH, effective focal length f, entrance pupil diameter EPD of the lens, and the related values corresponding to each of the aforementioned conditional expressions.
TABLE 4
Figure 53076DEST_PATH_IMAGE004
TABLE 5
Figure 54530DEST_PATH_IMAGE005
In summary, the VR glasses detection lens provided by the present invention at least has the following advantages:
(1) By reasonably setting the focal power combination of the four lens groups, the overall focal length of the lens is-8.0 mm but f < -6.0mm, the lens can have a larger field angle (FOV is less than or equal to 126 ℃) and higher imaging quality, and the visual experience of human eyes can be better simulated.
(2) Through the reasonable combination of the front diaphragm and the sixteen spherical lenses, the lens can have a 126-degree view field close to human eyes, so that the experience of people when using VR glasses can be well simulated, and the observation effect suitable for the human eyes can be better corrected.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A VR glasses inspection lens, wherein the number of the groups having optical power is 4, and the VR glasses inspection lens sequentially includes, from an object side to an image plane along an optical axis:
a diaphragm;
a first group having positive optical power;
a second group having positive optical power;
a third group having a negative optical power;
a fourth group having positive optical power;
each group has four lenses;
the VR glasses detection lens meets the following conditional expression:
-6<fQ1/f<-3；
-30<fQ2/f<-5；
0<fQ3/f<300；
-6<fQ4/f<0；
wherein f represents the effective focal length of the VR glasses detection lens, fQ1Representing an effective focal length, f, of the first groupQ2Representing an effective focal length of the second group, fQ3Representing the effective focal length of the third group, fQ4Representing an effective focal length of the fourth group.
2. The VR glasses detection lens of claim 1, wherein the first group comprises, in order from an object side to an image plane along an optical axis: the VR glasses detection lens comprises a first lens, a second lens, a third lens and a fourth lens, and the VR glasses detection lens meets the following conditional expressions:
-0.9<f1/fQ1< 0；
0.5<f2/fQ1<1.5；
2.0<f3/fQ1< 3.5；
3.0<f4/fQ1<4.9；
wherein f1 represents an effective focal length of the first lens, f2 represents an effective focal length of the second lens, f3 represents an effective focal length of the third lens, and f4 represents an effective focal length of the fourth lens.
3. The VR glasses inspection lens of claim 2, wherein the first lens and the second lens form a first cemented lens group, the first cemented lens groupEffective focal length f of cemented lens groupJ1Satisfies the following conditions: 75mm < | fJ1|＜330mm。
4. The VR glasses inspection lens of claim 1, wherein the second group comprises, in order from an object side to an image side along an optical axis: a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element; the VR glasses detection lens meets the following conditional expression:
0<f5/fQ2<1.5；
-1.5<f6/fQ2<-0.5；
1.4<f7/fQ2<2.8；
1.1<f8/fQ2<1.5；
where f5 denotes an effective focal length of the fifth lens, f6 denotes an effective focal length of the sixth lens, f7 denotes an effective focal length of the seventh lens, and f8 denotes an effective focal length of the eighth lens.
5. The VR glasses inspection lens of claim 4, wherein the fifth lens and the sixth lens form a second cemented lens group, and an effective focal length f of the second cemented lens groupJ2Satisfies the following conditions: 250mm < | fJ2|＜1310mm。
6. The VR glasses detection lens of claim 4, wherein the third group comprises, in order from an object side to an image plane along an optical axis: a ninth lens element, a tenth lens element, an eleventh lens element, and a twelfth lens element; the VR glasses detection lens meets the following conditional expression:
0<f9/fQ3< 1.2；
-2.0<f10/fQ3<0；
-1<f11/fQ3<0；
0<f12/fQ3<0.5；
where f9 denotes an effective focal length of the ninth lens, f10 denotes an effective focal length of the tenth lens, f11 denotes an effective focal length of the eleventh lens, and f12 denotes an effective focal length of the twelfth lens.
7. The VR glasses inspection lens of claim 6, wherein the eleventh lens and the twelfth lens form a third cemented lens group, and an effective focal length f of the third cemented lens groupJ3Satisfies the following conditions: -170mm < fJ3＜-80mm。
8. The VR glasses detection lens of claim 1, wherein the fourth group comprises, in order from an object side to an image plane along an optical axis: a thirteenth lens element, a fourteenth lens element, a fifteenth lens element, and a sixteenth lens element; the VR glasses detection lens meets the following conditional expression:
4.0<f13/fQ4<5.0；
2.0<f14/fQ4<3.1；
0<f15/fQ4<3.0；
-4.5<f16/fQ4< 0；
wherein f13 denotes an effective focal length of the thirteenth lens, f14 denotes an effective focal length of the fourteenth lens, f15 denotes an effective focal length of the fifteenth lens, and f16 denotes an effective focal length of the sixteenth lens.
9. The VR glasses detection lens of claim 8, wherein the fifteenth lens and the sixteenth lens form a fourth cemented lens group, and an effective focal length f of the fourth cemented lens group isJ4Satisfies the following conditions: f is more than 95mmJ4＜335mm。
10. The VR glasses detection lens of claim 6, wherein the VR glasses detection lens satisfies the following conditional expressions:
1.0<CT8/CT10<1.6；
wherein CT8 denotes a center thickness of the eighth lens, and CT10 denotes a center thickness of the tenth lens.
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