CN210835439U - Large-field-angle high-image-quality eyepiece optical system and equipment - Google Patents
Large-field-angle high-image-quality eyepiece optical system and equipment Download PDFInfo
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Abstract
The utility model relates to an eyepiece optical system and equipment with large field angle and high image quality, which comprises a first lens group and a second lens group which are arranged in sequence along the optical axis direction from the observation side of human eyes to the micro display; the first lens group is composed of one or more lenses, and the second lens group comprises a Fresnel lens; the Fresnel lens comprises a Fresnel surface; through having adopted the combination of novel optics face type fresnel face type and traditional optics sphere and aspheric surface face type to the focus of each lens and battery of lens realizes eliminating by a wide margin of system's aberration under the circumstances that satisfies specific condition, reduces each optical component's sensitivity, and the processing and the equipment of easy part have especially realized simultaneously big angle of vision, low distortion, low colour difference, low field curvature, low astigmatism etc. optical index, and the observer can pass through the utility model discloses eyepiece optical system observes full picture high definition, undistorted, the even picture by a wide margin of image quality, reaches the visual experience of high telepresence.
Description
Technical Field
The present invention relates to a head-mounted display device optical system, and more particularly, to a large field angle high image quality eyepiece optical system and device.
Background
With the continuous development of electronic devices towards ultra-miniaturization and the development of new computer, micro-electronics, photoelectric devices and communication theory and technology, the novel mode based on human-oriented and man-machine-in-one of wearable computing becomes possible. The method is continuously applied to the fields of military affairs, industry, medical treatment, education, consumption and the like. In a typical wearable computing system architecture, the head mounted display device is a key component. The head-mounted display device guides video image light emitted by a miniature image display (such as a transmission type or reflection type liquid crystal display, an organic electroluminescent device and a DMD device) to pupils of a user through an optical technology, realizes virtual and enlarged images in the near-eye range of the user, and provides visual and visible images, videos and character information for the user. The eyepiece optical system is the core of the head-mounted display device and realizes the function of displaying the miniature image in front of human eyes to form a virtual amplified image.
The head-mounted display device is developed in the directions of compact size, light weight, convenience in head mounting, load reduction and the like. Meanwhile, the large field angle and the visual comfort experience gradually become key factors for measuring the quality of the head-mounted display device, the large field angle determines the visual experience effect with high telepresence, and the high image quality and low distortion determine the comfort level of the visual experience. Meeting these requirements requires that the eyepiece optical system achieve as large an angle of view, high image resolution, low distortion, small curvature of field, small volume, etc., as possible, and meeting the above optical performance is a great challenge to the design and aberration optimization of the system.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in that current optical structure image quality is not high, there is distortion and angle of vision not big enough, to the above-mentioned defect of prior art, provides an eyepiece optical structure, system and equipment.
The utility model provides a technical scheme that its technical problem adopted is: the novel Fresnel surface type, the traditional spherical surface type and the traditional aspheric surface type are creatively and reasonably matched to construct an eyepiece optical system with high image quality, large view field and easy processing.
An eyepiece optical system with a large field angle and high image quality is constructed, and comprises a first lens group and a second lens group which are sequentially arranged along the direction of an optical axis from the observation side of a human eye to a position between micro displays; the first lens group is composed of one or more lenses, and the second lens group comprises a Fresnel lens; the Fresnel lens comprises a Fresnel surface;
the Fresnel surface can be divided into N sections from the center to the edge, wherein the frequency in the nth section is fn, and the N and N satisfy the following relational expressions (1) and (2):
N≥1 (1)；
1≤n≤N (2)；
the Fresnel lens has a focal length of F4, the total focal length of the optical system is F, and F4 and F satisfy the following relation (3):
0.3≤|F4/F| (3)。
as a further aspect of the present invention: the clear aperture of the Fresnel lens is D4, and D4 and F4 satisfy the following relation (4):
|D4/F4|≤2.5 (4)。
as a further aspect of the present invention: the distance from the optical surface of the Fresnel lens close to one side of the micro display device to the micro display device is fd, and the fd and the F satisfy the following relational expression (5):
0.05≤fd/F≤1.0 (5)。
as a further aspect of the present invention: said F4 and F further satisfy the following relation (6):
0.3455≤|F4/F| (6)。
as a further aspect of the present invention: the D4 and F4 further satisfy the following relationship (7):
|D4/F4|≤2.05 (7)。
as a further aspect of the present invention: said fd and F further satisfy the following relation (8):
0.095≤fd/F≤0.89 (8)。
as a further aspect of the present invention: each lens of the first lens group and the second lens group is made of glass materials or plastic materials.
As a further aspect of the present invention: the Fresnel lens also comprises a common optical surface; the common optical surface is a plane, spherical or aspheric surface type.
As a further aspect of the present invention: the surface type of each lens in the first lens group is a spherical surface type, an even-order aspheric surface type or a Fresnel surface type, and at least one axisymmetric aspheric lens exists in the first lens group and the second lens group.
The utility model also provides a high eyepiece optical equipment of image quality of big angle of vision, including two miniature display device that correspond with the people left and right sides eye position respectively, still include as in the aforesaid arbitrary any optical system, optical system set up human eye with position in the middle of the miniature display device, with the picture that miniature display device shows with high image quality, low distortion, the characteristics of big angle of vision are projected in the people's eye.
The beneficial effects of the utility model reside in that: the utility model discloses owing to adopted the combination of neotype fresnel surface type and traditional optics sphere and aspheric surface type to the focus of each lens and battery of lens realizes eliminating by a wide margin of system's aberration under the circumstances that satisfies specific condition, reduces each optical component's sensitivity, and the processing and the equipment of easy part have especially realized simultaneously big angle of vision, low distortion, low colour difference, low field curvature, optical index such as low astigmatism, and the observer can pass through eyepiece optical system watches full picture high definition, undistorted, the even picture by a wide margin of image quality, reaches the visual experience of high telepresence.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic view of the fresnel surface of the present invention;
FIG. 2 is an enlarged cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
fig. 3 is a schematic structural diagram of an eyepiece optical system according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a diffuse spot array of an eyepiece optical system according to a first embodiment of the present invention;
fig. 5 is a schematic diagram of distortion of an eyepiece optical system according to a first embodiment of the present invention;
fig. 6 is a schematic diagram of an optical transfer function MTF of an eyepiece optical system according to a first embodiment of the present invention;
fig. 7 is a schematic structural view of an eyepiece optical system according to a second embodiment of the present invention;
fig. 8 is a schematic view of a diffuse spot array of an eyepiece optical system according to a second embodiment of the present invention;
fig. 9 is a schematic diagram of distortion of an eyepiece optical system according to a second embodiment of the present invention;
fig. 10 is a schematic diagram of an optical transfer function MTF of an eyepiece optical system according to a second embodiment of the present invention;
fig. 11 is a schematic structural view of an eyepiece optical system according to a third embodiment of the present invention;
fig. 12 is a schematic diagram of a diffuse spot array of an eyepiece optical system according to a third embodiment of the present invention;
fig. 13 is a schematic diagram of distortion of an eyepiece optical system according to a third embodiment of the present invention;
fig. 14 is a schematic diagram of an optical transfer function MTF of an eyepiece optical system according to a third embodiment of the present invention;
fig. 15 is a schematic structural view of an eyepiece optical system according to a fourth embodiment of the present invention;
fig. 16 is a schematic diagram of a diffuse spot array of an eyepiece optical system according to the fourth embodiment of the present invention;
fig. 17 is a schematic diagram of distortion of an eyepiece optical system according to a fourth embodiment of the present invention;
fig. 18 is a schematic diagram of an optical transfer function MTF of an eyepiece optical system according to a fourth embodiment of the present invention;
fig. 19 is a schematic structural view of an eyepiece optical system according to a fifth embodiment of the present invention;
fig. 20 is a schematic view of a diffuse spot array of an eyepiece optical system according to an embodiment of the present invention;
fig. 21 is a schematic diagram illustrating distortion of an eyepiece optical system according to a fifth embodiment of the present invention;
fig. 22 is a schematic diagram of an optical transfer function MTF of an eyepiece optical system according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses an eyepiece optical system with large visual angle and high image quality, as shown in fig. 1 and fig. 2, provides an eyepiece optical system with large visual angle and high image quality, which comprises a first lens group A1 and a second lens group A2 which are arranged in sequence from the observation side of human eyes to the micro display along the optical axis direction; the first lens group a1 is composed of one or more lenses, and the second lens group a2 includes a fresnel lens; the Fresnel lens comprises a Fresnel surface;
the Fresnel surface can be divided into N sections from the center to the edge, wherein the frequency in the nth section is fn, and the N and N satisfy the following relations (1) and (2):
N≥1 (1)；
1≤n≤N (2)；
in the above relation (2), N takes the value of 1,2,3,4,5 … … N. Wherein the frequencies fn in different segments may be different. As shown in table one, the fresnel surface composition data is as follows:
table-Fresnel surface composition data
The Fresnel lens has a focal length of F4, the optical system has an overall focal length of F, and F4 and F satisfy the following relation (3):
0.3≤|F4/F| (3)；
in the above relation (3), the value of | F4/F | may be 0.3, 0.3455, 1.193, 0.3479, 0.3787, 0.472, 10.61.
In the above embodiments, a combination of a novel fresnel surface type and a conventional optical spherical surface and aspheric surface type is adopted, and the focal lengths of the lenses and the lens groups satisfy specific conditions to substantially eliminate system aberration, so as to reduce the sensitivity of each optical component, facilitate the processing and assembly of the components, and achieve optical indexes such as a large field angle, low distortion, low chromatic aberration, low curvature of field, and low astigmatism.
In a further embodiment, the fresnel lens has a clear aperture of D4, and D4 and F4 satisfy the following relation (4):
|D4/F4|≤2.5 (4)；
in the above relation (4), the value of | D4/F4| may be 2.05, 0.073, 0.338, 0.45, 1.45, 2.5.
In a further embodiment, the distance from the optical surface of the fresnel lens near the side of the micro-display device to the micro-display device is fd, and fd and F satisfy the following relation (5):
0.05≤fd/F≤1.0 (5)；
in the above relational expression (5), the value of fd/F may be 0.05, 0.095, 0.2, 0.355, 0.499, 0.87, 0.89, 1.0.
In a further embodiment, F4 and F further satisfy the following relationship (6):
0.3455≤|F4/F| (6)。
in a further embodiment, D4 and F4 further satisfy the following relationship (7):
|D4/F4|≤2.05 (7)。
in a further embodiment, fd and F further satisfy the following relationship (8):
0.095≤fd/F≤0.89 (8)。
by further optimizing the value range of the effective focal length of the Fresnel lens, the optical performance and the processing and manufacturing difficulty of the optical system are better balanced.
In a further embodiment, each lens of the first lens group a1 and the second lens group a2 is composed of a glass material or a plastic material; the method can fully correct all levels of aberration of the eyepiece optical system, and simultaneously control the manufacturing cost of the optical element and the weight of the optical system.
In a further embodiment, the fresnel lens further comprises a common optical surface; the common optical surface is a plane, spherical or aspherical surface.
In a further embodiment, the surface type of each lens in the first lens group a1 is a spherical surface type, an even-order aspherical surface type, or a fresnel surface type, and at least one axisymmetric aspherical lens is present in the first lens group a1 and the second lens group a 2; the novel Fresnel surface type, the traditional optical spherical surface type and the aspheric surface type are combined, the system aberration is greatly eliminated under the condition that the focal lengths of all the lenses and the lens group meet specific conditions, the sensitivity of all optical components is reduced, the processing and the assembly of the components are easy, and the optical indexes of large visual angle, low distortion, low chromatic aberration, low curvature of field, low astigmatism and the like are realized.
In the above embodiments, the aspheric surface is expressed by
Wherein z is the rise of the optical surface, c is the curvature at the vertex of the aspheric surface, k is the aspheric coefficient, α 2,4,6 … are coefficients of each order, and r is the distance coordinate from a point on the surface to the optical axis of the lens system.
The present invention will be further explained with reference to the following description and embodiments with reference to the accompanying drawings: in the light path diagrams of the embodiments described below, light emitted from the microdisplay enters a person after sequentially passing through the fresnel lens and the first lens group a1, the aperture may be an exit pupil imaged by the eyepiece optical system, and is a virtual exit aperture, and when the pupil of the EYE is at the aperture position, the best imaging effect can be observed.
Example one
The eyepiece design data for example one is shown in the following table:
table two ocular design data of embodiment one
Fig. 3 is a 2D structural diagram of an eyepiece optical system according to an embodiment, where the optical structure includes four optical lenses, the first lens group a1 includes a first lens L1, a second lens L2, and a third lens L3, where the first lens L1 and the third lens L3 are positive lenses, the second lens L2 is a negative lens, the first optical surface 1, the third optical surface 3, the fourth optical surface 4, the fifth optical surface 5, and the sixth optical surface 6 are spherical or aspheric surfaces convex to the human eye, and the second optical surface 2 is an even-aspheric surface concave to the human eye; the fresnel lens in the second lens group a2 is L4, the seventh optical surface 7 is an even aspheric surface, and the eighth optical surface 8 is a fresnel surface; the fourth-order coefficient of the parameter of the Fresnel surface of the eighth optical surface 8 is 1.57e-06, the sixth-order coefficient is 6.9e-10, the eighth-order coefficient is-7.75 e-13, and the tenth-order coefficient is 4.4 e-16. The Fresnel lens has a focal length of F4, the Fresnel surface has a clear aperture of D4, the optical structure has a total system focal length of F, the eighth optical surface 8 has a distance fd from the micro-display device, wherein | F4/F | is 1.193, | D4/F4| is 1.425, and fd/F is 0.605.
Fig. 4, fig. 5, and fig. 6 are respectively a scattered spot array diagram, a distortion diagram, and an optical transfer function MTF diagram of the optical system, which show that the light of each field of view of the present embodiment has a very high resolution and a very small optical distortion in a unit pixel of an image plane (display device I), the resolution of a unit period per 10mm reaches above 0.78, the aberration of the optical system is well corrected, and a uniform and high-optical-performance display image can be observed through the eyepiece optical system.
Example two
The eyepiece design data for example two is shown in the following table:
table three ocular design data of example two
Fig. 7 is a 2D structural diagram of an eyepiece optical system according to the second embodiment, which is characterized in that the optical structure is composed of two optical lenses, wherein the first lens group a1 is composed of a first lens L1, wherein the first lens L1 is a negative lens; the surface types of the first optical surface 1 and the second optical surface 2 are even aspheric surface types protruding towards human eyes, the fresnel lens in the second lens group a2 is a second lens L2, wherein the third optical surface 3 is an even aspheric surface, and the fourth optical surface 4 is a fresnel surface; the parameter of the fresnel surface of the fourth optical surface 4 has a fourth order coefficient of-4.1467078 e-05, a sixth order coefficient of 2.5702072e-07, an eighth order coefficient of-1.1292358 e-09, and a tenth order coefficient of 2.4473554 e-12. The focal length of the Fresnel lens is F4, the clear aperture of the Fresnel surface is D4, the total system focal length of the optical structure is F, the distance from the fourth optical surface 4 to the micro display device is fd, the | F4/F | of the Fresnel lens is 0.3479, the | D4/F4| of the Fresnel lens is 1.993, and the fd/F of the Fresnel lens is 0.941.
Fig. 8, 9 and 10 are respectively a scattered spot array diagram, a distortion diagram and an optical transfer function MTF diagram of the optical system, which show that the light of each field of view of the present embodiment has a high resolution and a small optical distortion in a unit pixel of an image plane (display device I), the resolution of a unit period per 10mm reaches above 0.15, the aberration of the optical system is well corrected, and a uniform and high-optical-performance display image can be observed through the eyepiece optical system.
EXAMPLE III
The eyepiece design data for example three is shown in the following table:
table four eyepiece design data for example three
Fig. 11 is a 2D structural diagram of an eyepiece optical system according to the third embodiment, which is characterized in that the optical structure is composed of three optical lenses compared with the first and second embodiments, wherein the first lens group a1 is composed of a first lens L1 and a second lens L2, wherein the first lens L1 is a positive lens, and the second lens L2 is a negative lens; the surface types of the first optical surface 1 and the fourth optical surface 4 are even aspheric surface types protruding towards human eyes, and the surface types of the second optical surface 2 and the third optical surface 3 are even aspheric surfaces concave towards human eyes; the fresnel lens in the second lens group a2 is the third lens L3, the fifth optical surface 5 is an even aspheric surface, and the sixth optical surface 6 is a fresnel surface. The focal length of the Fresnel lens is F4, the clear aperture of the Fresnel surface is D4, the total system focal length of the optical structure is F, the distance from the sixth optical surface to the micro display device is fd, and the distance between the sixth optical surface and the micro display device is | F4/F | is 0.3787, | D4/F4| is 2.0, and fd/F is 0.791.
Fig. 12, 13 and 14 are respectively a diffuse speckle array diagram, a distortion diagram and an optical transfer function MTF diagram of the optical system, which reflect that the light of each field of view of the present embodiment has a very high resolution and a very small optical distortion in a unit pixel of an image plane (display device I), the resolution per 10mm of a unit period reaches above 0.50, the aberration of the optical system is well corrected, and a uniform and high-optical-performance display image can be observed through the eyepiece optical system.
Example four
The eyepiece design data for example four is shown in the following table:
table five eyepiece design data for example four
Fig. 15 is a 2D structure diagram of an eyepiece optical system according to a fourth embodiment, which is characterized in that the optical structure is composed of three optical lenses, and the first lens group a1 includes a fresnel lens, where the first lens group a1 is composed of a first lens L1 and a second lens L2, the first lens L1 is a positive lens, and the second lens L2 is a fresnel lens, as compared with the first embodiment, the second embodiment, and the third embodiment; the surface type of the first optical surface 1 is an even aspheric surface type protruding towards human eyes, the surface type of the second optical surface 2 is a spherical surface concave towards human eyes, and the surface type of the third optical surface 3 is an even aspheric surface concave towards human eyes; the fresnel lens in the second lens group a2 is the third lens L3, the fifth optical surface 5 is an even aspheric surface, and the sixth optical surface 6 is a fresnel surface. The parameter fourth time coefficient of the Fresnel surface of the sixth optical surface 6 is-4.8396642 e-05, the sixth time coefficient is 9.6819004e-08, the eighth time coefficient is-1.60209 e-10, and the tenth time coefficient is 1.294112 e-13. The focal length of the Fresnel lens is F4, the clear aperture of the Fresnel surface is D4, the total system focal length of the optical structure is F, the distance from the sixth optical surface 6 to the micro display device is fd, and the distance | F4/F | is 0.472, | D4/F4| is 1.45, and fd/F is 0.93.
Fig. 16, 17 and 18 are respectively a diffuse speckle array diagram, a distortion diagram and an optical transfer function MTF diagram of the optical system, which reflect that the light of each field of view of the present embodiment has a very high resolution and a very small optical distortion in a unit pixel of an image plane (display device I), the resolution per 10mm of a unit period reaches above 0.30, the aberration of the optical system is well corrected, and a uniform and high-optical-performance display image can be observed through the eyepiece optical system.
EXAMPLE five
The eyepiece design data for example five is shown in the following table:
table six ocular design data for example five
Fig. 19 is a 2D structural diagram of an eyepiece optical system according to a fifth embodiment, which is characterized in that the optical structure includes four optical lenses, and the first lens group a1 includes a first lens L1, a second lens L2, and a third lens L3, where the first lens L1 and the third lens L3 are positive lenses, the second lens L2 is a negative lens, the first optical surface 1 has a surface type that is convex to a human eye, the third optical surface 3, the fourth optical surface 4, and the fifth optical surface 5 have a surface type that is an even aspheric surface type that is convex to the human eye, and the second optical surface 2 and the sixth optical surface 6 have an even aspheric surface type that is concave to the human eye; the fresnel optical lens in the second lens group a2 is L4, the seventh optical surface 7 is an even aspheric surface, and the eighth optical surface 8 is a fresnel surface. The fourth time coefficient of the parameter of the Fresnel surface of the eighth optical surface is-1.6683367 e-06, the sixth time coefficient is 1.3777189e-10, the eighth time coefficient is-1.2996377 e-11 and the tenth time coefficient is 6.9607322 e-15. The focal length of the Fresnel lens is F4, the clear aperture of the Fresnel surface is D4, the total system focal length of the optical structure is F, the distance from the sixth optical surface 6 to the micro display device is fd, and the distance | F4/F | is 10.61, | D4/F4| is 0.073, and fd/F is 0.62.
Fig. 20, 21 and 22 are respectively a diffuse speckle array diagram, a distortion diagram and an optical transfer function MTF diagram of the optical system, which show that the light of each field of view of the present embodiment has a very high resolution and a very small optical distortion in a unit pixel of an image plane (display device I), the resolution per 10mm of a unit period reaches above 0.50, the aberration of the optical system is well corrected, and a uniform and high-optical-performance display image can be observed through the eyepiece optical system.
Each item of data of the first to fifth embodiments meets the parameter requirements recorded in the contents of the utility model, and the results are shown in the following table seven:
table seven data of examples one to five
| F4/F | D4/F4 | fd/F | |
| Example one | 1.193 | 1.425 | 0.605 |
| Example two | 0.3479 | 1.993 | 0.941 |
| EXAMPLE III | 0.3787 | 2.0 | 0.791 |
| Example four | 0.472 | 1.45 | 0.93 |
| EXAMPLE five | 10.61 | 0.073 | 0.62 |
In another embodiment, the present invention further provides a large field angle high image quality eyepiece optical device, which comprises two micro-display devices corresponding to the left and right eye positions of a person, and further comprises an optical system of the foregoing, wherein the optical system is disposed at a position between the human eye and the micro-display device, the aberration of the system is sufficiently corrected by the combination of the first lens group a1 and the fresnel lens a2 through the positive and negative lenses, and the first lens L1 protruding toward the human eye and the fresnel lens capable of providing sufficient positive power are adopted to project the picture displayed by the micro-display device into the human eye with high image quality, low distortion and large field angle; an observer can watch a full-picture high-definition large-amplitude picture without distortion and with uniform image quality through the eyepiece optical equipment, and the visual experience of high telepresence is achieved. Wherein, the micro display device is an organic electroluminescent device or a transmission type liquid crystal display.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (10)
1. An eyepiece optical system with a large field angle and high image quality is characterized by comprising a first lens group and a second lens group which are sequentially arranged along the direction of an optical axis from the observation side of a human eye to a micro display; the first lens group is composed of one or more lenses, and the second lens group comprises a Fresnel lens; the Fresnel lens comprises a Fresnel surface;
the Fresnel surface can be divided into N sections from the center to the edge, wherein the frequency in the nth section is fn, and the N and N satisfy the following relational expressions (1) and (2):
N≥1 (1)；
1≤n≤N (2)；
the Fresnel lens has a focal length of F4, the total focal length of the optical system is F, and F4 and F satisfy the following relation (3):
0.3≤|F4/F| (3)。
2. the eyepiece optical system of claim 1, wherein the fresnel lens has a clear aperture of D4, and D4 and F4 satisfy the following relation (4):
|D4/F4|≤2.5 (4)。
3. an eyepiece optical system as recited in claim 1, wherein the distance from the optical surface of the fresnel lens on the side close to the micro display device is fd, and the following relation (5) is satisfied between fd and F:
0.05≤fd/F≤1.0 (5)。
4. eyepiece optical system according to claim 1, wherein said F4 and F further satisfy the following relation (6):
0.3455≤|F4/F| (6)。
5. eyepiece optical system according to claim 2, wherein the D4 and F4 further satisfy the following relation (7):
|D4/F4|≤2.05 (7)。
6. eyepiece optical system according to claim 3, wherein said fd and F further satisfy the following relation (8):
0.095≤fd/F≤0.89 (8)。
7. the eyepiece optical system of claim 1, wherein each lens of the first lens group and the second lens group is comprised of a glass material or a plastic material.
8. An eyepiece optical system as recited in claim 1, wherein the fresnel lens further comprises a common optical surface; the common optical surface is a plane, spherical or aspheric surface type.
9. An eyepiece optical system as recited in claim 1, wherein each lens in the first lens group has a surface type that is a spherical surface type, an even-order aspherical surface type, or a fresnel surface type, and at least one axisymmetric aspherical lens is present in the first lens group and the second lens group.
10. An eyepiece optical device with large field angle and high image quality, comprising two micro-display devices corresponding to the left and right eyes of a human respectively, characterized by further comprising an optical system as claimed in claims 1 to 9, wherein the optical system is arranged at a position between the human eyes and the micro-display devices, and projects the picture displayed by the micro-display devices into the human eyes with the characteristics of high image quality, low distortion and large field angle.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824712A (en) * | 2019-11-26 | 2020-02-21 | 深圳纳德光学有限公司 | Large-field-angle high-image-quality eyepiece optical system and equipment |
| CN114236829A (en) * | 2021-11-30 | 2022-03-25 | 歌尔光学科技有限公司 | Optical system and head-mounted display equipment |
| WO2023070808A1 (en) * | 2021-10-27 | 2023-05-04 | 歌尔光学科技有限公司 | Optical module and head-mounted display device |
| WO2024077786A1 (en) * | 2022-10-14 | 2024-04-18 | 北京凌宇智控科技有限公司 | Optical system, wearable interaction device and interaction system |
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2019
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| CN110824712A (en) * | 2019-11-26 | 2020-02-21 | 深圳纳德光学有限公司 | Large-field-angle high-image-quality eyepiece optical system and equipment |
| WO2023070808A1 (en) * | 2021-10-27 | 2023-05-04 | 歌尔光学科技有限公司 | Optical module and head-mounted display device |
| CN114236829A (en) * | 2021-11-30 | 2022-03-25 | 歌尔光学科技有限公司 | Optical system and head-mounted display equipment |
| JP7462115B2 (en) | 2021-11-30 | 2024-04-04 | ゴアテック・オプティカル・テクノロジー・カンパニー，リミテッド | Optical system and head-mounted display device |
| WO2024077786A1 (en) * | 2022-10-14 | 2024-04-18 | 北京凌宇智控科技有限公司 | Optical system, wearable interaction device and interaction system |
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