CN207663143U - Eyepiece and wear display equipment - Google Patents
Eyepiece and wear display equipment Download PDFInfo
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- CN207663143U CN207663143U CN201721378415.8U CN201721378415U CN207663143U CN 207663143 U CN207663143 U CN 207663143U CN 201721378415 U CN201721378415 U CN 201721378415U CN 207663143 U CN207663143 U CN 207663143U
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- eyepiece
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- 239000006185 dispersion Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 abstract description 34
- 238000013461 design Methods 0.000 description 13
- 230000004075 alteration Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 201000009310 astigmatism Diseases 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
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- 239000003086 colorant Substances 0.000 description 3
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
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- 102200029613 rs35593767 Human genes 0.000 description 2
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- 241000700608 Sagitta Species 0.000 description 1
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- 230000004323 axial length Effects 0.000 description 1
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- 210000003128 head Anatomy 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
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- 230000002452 interceptive effect Effects 0.000 description 1
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Abstract
The utility model provides a kind of eyepiece and wears display equipment, wherein eyepiece includes：The positive lens and negative lens coaxially set gradually；Wherein, the incidence surface of the positive lens is planar Fresnel face, and light-emitting surface is convex surface；The incidence surface of the negative lens is concave surface, and light-emitting surface is convex surface；Light to be observed is incident on the incidence surface of the negative lens, the incidence surface of the positive lens is refracted to by the negative lens, then enter human eye after positive lens refraction.Eyepiece provided by the utility model and wear display equipment, realize ultra-thin eyepiece optical system, be conducive to wear display equipment more minimize, lightweight.
Description
Technical field
The utility model is related to technical field of virtual reality more particularly to a kind of eyepiece and wear display equipment.
Background technology
VR (Virtual Reality, virtual reality) technology is a kind of computer that can be created with the experiencing virtual world
Analogue system, it generates a kind of simulated environment using computer, and is regarded by Multi-source Information Fusion, interactive Three-Dimensional Dynamic
The system emulation of scape and entity behavior makes user be immersed in the simulated environment.With the development of technology, VR wears display equipment
It is such as playing, real estate, tourism etc., which has in fields, to be widely applied.
Use the screen that mobile phone uses as display device, this screen currently, a type of VR wears display equipment
Size it is usually larger, in 2~5 inch.It is existing to wear in display equipment, match with this larger-size display device
The eyepiece optical system of conjunction usually has the characteristics that axial distance length.The eyepiece of axial distance length cannot be satisfied to wearing display
The lightening demand of equipment.
Utility model content
The many aspects of the utility model provide a kind of eyepiece and wear display equipment, realize ultra-thin eyepiece optics system
System, be conducive to wear display equipment more minimize, lightweight.
The utility model provides a kind of eyepiece, including：The positive lens and negative lens coaxially set gradually；
Wherein, the incidence surface of the positive lens is planar Fresnel face, and light-emitting surface is convex surface；The incidence surface of the negative lens
For concave surface, light-emitting surface is convex surface；
Light to be observed is incident on the incidence surface of the negative lens, and entering for the positive lens is refracted to by the negative lens
Smooth surface, then be emitted through the positive lens.
Still optionally further, the light-emitting surface of the positive lens is convex aspheric surface.
Still optionally further, the refractive index n1 and dispersion v1 of the positive lens meet following condition：1.5 ＜ n1 ＜ 1.55,
55 ＜ v1 ＜ 60；The refractive index n2 and dispersion v2 of the negative lens meet following condition：1.5 ＜ n2 ＜ 1.55,55 ＜ v2 ＜ 60.
The utility model embodiment also provides one kind and wearing display equipment, including the eyepiece that the utility model embodiment provides
And the coaxial display device with the eyepiece；The screen exit rays that the display device is sent out enter people after eyepiece refraction
Eye.
Still optionally further, central point of the central point of the light-emitting surface of the positive lens to the display screen of the display device
Distance TTL be less than 32mm.
Still optionally further, the distance T0 of the central point of the positive lens to human eye meets following condition：0.35TTL<T0<
0.45TTL；The center thickness T1 of the positive lens meets following condition：0.09TTL<T1<0.1TTL.
Still optionally further, the center thickness T2 of the negative lens meets following condition：0.09TTL<T2<0.1TTL.
Still optionally further, the focal length F of the equipment meets following condition：0.9TTL<F<0.95TTL.
Still optionally further, the Fresnel radius of curvature R of the incidence surface of the positive lens meets following condition：-0.6F<R
<-0.65F。
Still optionally further, the focal length of the negative lens meets following condition：-700<F2<0；The focal length of the positive lens
F1<F。
It eyepiece provided by the utility model and wears in display equipment, eyepiece is constituted using positive and negative lens simple in structure
Optical system.Wherein, the light-emitting surface of positive lens is convex surface, and incidence surface is planar Fresnel face；The incidence surface of negative lens is concave surface,
Light-emitting surface is convex surface.Such goggle structure is ensuring that the optical property of positive and negative lens is good, is significantly reducing
The thickness of lens realizes ultra-thin eyepiece optical system, be conducive to wear display equipment more minimize, lightweight.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and constitutes one of the utility model
Point, the exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the utility model
Improper restriction.In the accompanying drawings：
Fig. 1 a are the structural schematic diagram for the eyepiece that one embodiment of the utility model provides；
Fig. 1 b are the structural schematic diagram for wearing display equipment that one embodiment of the utility model provides；
Fig. 2 a are that wearing for the utility model embodiment offer shows that MTF of the equipment under display device limiting resolution is bent
Line；
Fig. 2 b are that wearing for the utility model embodiment offer shows equipment under 1/2 limiting resolution of display device
MTF curve；
Fig. 3 is a schematic diagram of the optics curvature of field and distortion for wearing display equipment that the utility model embodiment provides；
Fig. 4 is the point range diagram meaning for wearing display equipment that the utility model embodiment provides；
Fig. 5 is a schematic diagram of the system chromatic curve for wearing display equipment that the utility model embodiment provides.
Specific implementation mode
It is specific below in conjunction with the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Technical solutions of the utility model are clearly and completely described in embodiment and corresponding attached drawing.Obviously, described embodiment
Only it is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field
The every other embodiment that those of ordinary skill is obtained without making creative work, belongs to the utility model
The range of protection.
Fig. 1 a are the structural schematic diagram for the eyepiece that one embodiment of the utility model provides.As shown in Figure 1a, the light of the eyepiece
System includes：
The positive lens 11 and negative lens 12 coaxially set gradually, the going out close to negative lens of incidence surface Si 1 of positive lens 11
Smooth surface Se2.
Wherein, the incidence surface Si2 of negative lens 12 is concave surface, and light-emitting surface Se2 is convex surface.When light incidence to be observed, Si2
It can ensure that negative lens 12 has higher collection efficiency for concave surface, can receive as much as possible and transmit light to be observed.Se2 is
Convex surface has the function of wide-angle refractive power, enables to the light that the angle of divergence is larger, with larger height of incidence and smaller
The angle of divergence is incident on the incidence surface Si1 of positive lens 11.In turn, the rim ray and chief ray being incident on Si1 relative to
Human eye has larger subtended angle and smaller light height of incidence, realizes the purpose for increasing field angle.
Wherein, the incidence surface Si1 of positive lens 11 is planar Fresnel face, and light-emitting surface Se1 is convex surface.It is incident on when there is light
When on Si1, Si1 collects the light being incident to thereon, and Se1 is reached to the light shaping and with desired angle.Se1 is convex
Face has the function of wide-angle refractive power, can further increase field angle.
Optionally, Se1 can be designed as convex aspheric surface.Spy occurs from center to continuous edge for the radius of curvature of convex aspheric surface
Fixed variation, can accurately control the trend of every emergent ray so that and emergent ray is emitted to the angle set at human eye,
To carry out the correction of aberration while increasing field angle.
In the present embodiment, optionally, it after determining the deviation degree demand of aberration correction demand and light, can carry out anti-
To design, the convex aspheric surface Se1 of modified radius of curvature is obtained.In an optional embodiment, to ensure processing and inspection
The convenience of survey, the face type that can design Se1 are even aspheric surface.Se1 can be as follows even aspheric surface equation carry out face type
Design：
Wherein, z indicates that the coordinate along optical axis direction, r are the radial coordinate along lens height direction；C be with it is aspherical
The relevant two-term coefficient of curvature of central point, c=1/r0, r0For the radius of curvature of aspherical central point；K is circular cone coefficient, k
=-e2；aiFor the coefficient of each even order terms.Optionally, the present embodiment can choose N=3, that is, even order terms are most in actual design
Height is to 6 powers.
Optionally, the face type that Se1 can also can be designed in the present embodiment is that odd times are aspherical.Se1 can be as follows it is strange
Secondary aspherical equation carries out face type design：
Wherein, βiFor the coefficient of each odd item.
In an optional embodiment, when processing positive lens 11 and negative lens 12, plastic material can be selected.Plastics material
Matter is easy to process, and its lighter weight, lays a good foundation for the lightweight of eyepiece optical system.Wherein, the refraction of positive lens 11
Rate n1 and dispersion v1 can meet following condition：1.5 ＜ n1 ＜ 1.55,55 ＜ v1 ＜ 60；The refractive index n2 of negative lens 12 and dispersion
V2 meets following condition：1.5 ＜ n2 ＜ 1.55,55 ＜ v1 ＜ 60.Optionally, in actual processing, the present embodiment selects K26R
The plastic material processing positive lens and negative lens of model.The refractive index of the plastic material of K26R models is 1.535, and dispersion is
55.6。
Eyepiece provided in this embodiment is made of positive and negative lens simple in structure.Wherein, the light-emitting surface of positive lens is convex
Face, incidence surface are planar Fresnel face；The incidence surface of negative lens is concave surface, and light-emitting surface is convex surface.Such goggle structure, true
Protect positive and negative lens optical property it is good in the case of, significantly reduce the thickness of lens, realize ultra-thin eyepiece optics system
System, be conducive to wear display equipment more minimize, lightweight.Secondly, the light-emitting surface of positive lens 11 is convex aspheric surface, certain
The aberration of whole eyepiece optical system is corrected in degree so that eyepiece image quality is excellent, image clearly.In addition to this, by
Positive negative lens group at eyepiece, the aberration of eyepiece overall optical system can be corrected, improve image quality, and with simple in structure
And advantage at low cost.
Fig. 1 b are the structural schematic diagram for wearing display equipment that one embodiment of the utility model provides.As shown in Figure 1 b, should
Wearing display equipment includes：
Positive lens 11, negative lens 12 and the display device 13 coaxially set gradually.Wherein, the incidence surface of positive lens 11
Si1 is close to the light-emitting surface Se2 of negative lens, and the incidence surface Si2 of negative lens is close to display device 13.
Optionally, in this example it is shown that device 13 can be larger-size display device, for example, mobile phone display
Device or LCD (Liquid Crystal Display, liquid crystal display device) etc..
As shown in Figure 1 b, define display device 13 display screen central point to positive lens 11 light-emitting surface Se1 center
The distance of point is TTL (total track length, ray tracing length).It is provided in this embodiment to wear in display equipment,
Since there is stronger refractive power and relatively thin volume, TTL can reach 32mm or less for positive lens 11 and negative lens 12.
Display equipment is worn using big display screen relative to existing, smaller TTL, which is greatly reduced, in the present embodiment wears display
The volume of equipment.
As shown in Figure 1 b, user wear it is provided in this embodiment wear display equipment after, position where human eye is eyepiece
The exit pupil position of optical system.The distance for defining central point to the human eye of the light-emitting surface Se1 of positive lens 11 is T0.To ensure user
After display equipment is worn in wearing, the preferable image of effect can be watched, the length that T0 can be arranged meets following condition：
0.35TTL<T0<0.45TTL.Optionally, it is contemplated that the head dummy of different user is different, and length T0 can be by setting wearing display
The standby upper adjustable support member of setting controls.
Optionally, in the present embodiment, for ensure two lens in eyepiece have relatively thin thickness and preferable light
Performance is learned, the center thickness T1 that can design positive lens 11 meets following condition：0.09TTL<T1<0.1TTL；In negative lens 12
Heart thickness T2 meets following condition：0.09TTL<T2<0.1TTL；The focal length F of equipment meets following condition：0.9TTL<F<
0.95TTL.Optionally, the Fresnel radius of curvature R that can design the incidence surface S i 1 of positive lens 11 meets following condition：-0.6F
<R<-0.65F；The focal length F1 of positive lens 11<F, the focal length -700 of negative lens 12<F2<0.For example, through optimizing repeatedly, in display
In the case that the display chip pixel dimension of part 13 is 39um, F=29.24mm, F1=28.78mm, F2=- can be chosen
677.6mm。
In the present embodiment, above-mentioned structure and parameter designing enable to the angle of half field-of view θ of eyepiece optical system to reach
To 98 ° or so, that is to say, that tan θ are between 1.1 to 1.2.In turn, when display equipment viewing virtual scene is worn in user's wearing,
It is small to wear pressure, and deeper feeling of immersion and the sense of reality can be generated.
In the present embodiment, eyepiece cooperation display device can realize shorter axial distance and about 98 ° of field angle,
While ensureing that wearing display equipment has sufficiently large field angle, it is made more to minimize and lightweight.
The utility model embodiment offer will be worn with a specific example in conjunction with table 1 and table 2 with lower part
The optical system of display equipment is specifically addressed.A kind of feasible design result, in table 1, Surface are illustrated in table 1
Indicate that the optical surface sequentially numbered from human eye to display device, Type indicate that the face type of each optical surface, C indicate the song of each optical surface
Rate, T indicate each optical surface at a distance from latter optical surface, and Glass indicates the material of each optical surface, Semi-Diameter tables
Show that the aperture of each optical surface, Conic indicate quadratic surface constant.
Table 1
In table 1, Surface1 be plane where human eye, the light-emitting surface Se1 that Surface2 is positive lens 11,
It is light-emitting surface Se2, Surface5 of negative lens 12 is negative lens that Surface3, which is incidence surface Si1, Surface4 of positive lens 11,
12 incidence surface Si2, Surface6 is the display screen of display device 13.
As shown in table 1, in a kind of feasible design method, the thickness of positive lens 11 is 3mm, in light-emitting surface Se1
The distance of heart point to human eye is 13mm, and the radius of curvature of the central point of Se1 is 118.402mm, the Fresnel radius of curvature of Si1
It is -17.642.The thickness of negative lens 12 is 3mm, and the radius of curvature of the central point of light-emitting surface Se2 is 53.788mm, and Se2 with
The distance between central point of Si1 is 2.272mm, and the radius of curvature of the central point of incidence surface Si2 is 45.955mm.Si2 with it is aobvious
Show that the distance between display screen of device 13 is 23.748mm, the thickness of display device is 26.23mm.
In such design, the TTL=3+2.26+3+23.74=32mm of optical system, axial length is relative to existing
Technology greatly reduces.
In the design, even aspheric surface factor alpha 2, α 3, α 4 can be shown in following table：
Table 2
| Surface | α2 | α3 |
| 1 | 0.00E+00 | 0.00E+00 |
| 2 | 0.00E+00 | 0.00E+00 |
| 3 | -3.70E-06 | -3.73E-09 |
| 4 | 2.92E-05 | -4.83E-08 |
| 5 | 3.59E-05 | -5.87E-08 |
| 6 | 0.00E+00 | 0.00E+00 |
| 7 | 0.00E+00 | 0.00E+00 |
| 8 | 0.00E+00 | 0.00E+00 |
It, can be by drawing MTF (Modulation Transfer Function, modulation transfer function) based on above-mentioned design
Curve, the optics curvature of field and distortion figure, point range figure and chromatic curve figure come the image quality of optical system that design is obtained into
Row analysis.
Fig. 2 a are that MTF of the eyepiece optical system of the utility model embodiment offer under display device limiting resolution is bent
Line, Fig. 2 b are the MTF curves under 1/2 limiting resolution of display device.In Fig. 2 a and Fig. 2 b, a variety of colors respectively represents respectively
A field rays, abscissa indicate the point in optical system to the distance at optical system center, and it is close that the longitudinal axis represents image quality
Percentage in kind.MTF can be with the image quality of concentrated expression optical system, and curve shape is more smooth, and the height of opposite X-axis
Degree is higher (i.e. closer to 1), it was demonstrated that the image quality of the optical system is better.In Fig. 2 a and Fig. 2 b, the song of a variety of colors
Line is more smooth compact, and the mtf value that curve is characterized is very high.In Fig. 2 b, in 1/2 limiting resolution of display device, 0.6
MTF within visual field has reached 0.4 or more, illustrates that the aberration of optical system has obtained good correction.
Fig. 3 is a schematic diagram of the optics curvature of field and distortion for the eyepiece optical system that the utility model embodiment provides.Fig. 3
Left figure illustrate the curvature of field (Field Curvature), wherein different colours represent different wavelength, and solid line is expressed as meridian
(tangential) curvature of field, dotted line indicate that the sagitta of arc (sagittal) curvature of field, the two make the difference the astigmatism that optical system can be obtained.Astigmatism
With the curvature of field be influence axis outside field rays important aberration, astigmatism cross conference it is serious influence system off-axis ray at image quality
Amount, the curvature of field can cause center and peripheral optimal imaging not in one plane.It can be seen that from the left figure of Fig. 3, the present embodiment carries
The curvature of field and astigmatism of the optical system of confession are corrected within 5mm.It can be seen that from the right figure of Fig. 3 provided in this embodiment
The distortion (F-Tan (theta) distortion) of optical system is less than 25%.
Fig. 4 is the point range diagram meaning for the eyepiece optical system that the utility model embodiment provides.Point range figure illustrates light
Each field rays of system are converged at image planes and the disperse hot spot that is formed.RMS (the Root Mean of point range figure
Square, root mean square) radius is smaller, it was demonstrated that and the image quality of system is better.As seen from Figure 4, light provided in this embodiment
The RMS diameters of the disc of confusion of system are respectively less than 120um, illustrate that aberration school has obtained extraordinary correction.
Fig. 5 is a schematic diagram of the system chromatic curve for the eyepiece optical system that the utility model embodiment provides.Fig. 5
In, horizontal axis indicates that aberration, the longitudinal axis are field angle, and the variation of the departure degree characterization aberration of curve and the longitudinal axis, irrelevance is bigger, meaning
It is bigger that taste aberration.In Figure 5, maximum angle of half field-of view (Maximum Field) is 49 °, and aberration can be controlled in 350um ranges
It is interior.
It should be noted that the descriptions such as " first " herein, " second ", are for distinguishing different message, equipment, mould
Block etc. does not represent sequencing, does not also limit " first " and " second " and is different type.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Including so that process, method, commodity or equipment including a series of elements include not only those elements, but also wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that wanted including described
There is also other identical elements in the process of element, method, commodity or equipment.
The above description is only the embodiments of the present invention, is not intended to limit the utility model.For this field
For technical staff, various modifications and changes may be made to the present invention.All institutes within the spirit and principle of the utility model
Any modification, equivalent substitution, improvement and etc. of work, should be included within the right of the utility model.
Claims (10)
1. a kind of eyepiece, which is characterized in that including：
The positive lens and negative lens coaxially set gradually；
Wherein, the incidence surface of the positive lens is planar Fresnel face, and light-emitting surface is convex surface；The incidence surface of the negative lens is recessed
Face, light-emitting surface are convex surface；
Light to be observed is incident on the incidence surface of the negative lens, enters light by what the negative lens refracted to the positive lens
Face, then be emitted through the positive lens.
2. eyepiece according to claim 1, which is characterized in that the light-emitting surface of the positive lens is convex aspheric surface.
3. eyepiece according to claim 1 or 2, which is characterized in that the refractive index n1 and dispersion v1 of the positive lens meet
Following condition：1.5 ＜ n1 ＜ 1.55,55 ＜ v1 ＜ 60；
The refractive index n2 and dispersion v2 of the negative lens meet following condition：1.5 ＜ n2 ＜ 1.55,55 ＜ v2 ＜ 60.
4. one kind wearing display equipment, which is characterized in that including eyepiece according to any one of claims 1 to 3, and with institute
State the coaxial display device of eyepiece；
The screen exit rays that the display device is sent out enter human eye after eyepiece refraction.
5. equipment according to claim 4, which is characterized in that the central point of the light-emitting surface of the positive lens to the display
The distance TTL of the central point of the display screen of device is less than 32mm.
6. equipment according to claim 5, which is characterized in that the distance T0 of the central point of the positive lens to human eye meets
Following condition：0.35TTL<T0<0.45TTL；
The center thickness T1 of the positive lens meets following condition：0.09TTL<T1<0.1TTL.
7. equipment according to claim 5, which is characterized in that the center thickness T2 of the negative lens meets following condition：
0.09TTL<T2<0.1TTL。
8. equipment according to claim 5, which is characterized in that the focal length F of the equipment meets following condition：0.9TTL<F
<0.95TTL。
9. equipment according to claim 8, which is characterized in that the Fresnel radius of curvature R of the incidence surface of the positive lens
Meet following condition：-0.6F<R<-0.65F.
10. equipment according to claim 8, which is characterized in that the focal length of the negative lens meets following condition：-700<
F2<0；The focal length F1 of the positive lens<F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721378415.8U CN207663143U (en) | 2017-10-24 | 2017-10-24 | Eyepiece and wear display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721378415.8U CN207663143U (en) | 2017-10-24 | 2017-10-24 | Eyepiece and wear display equipment |
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| Publication Number | Publication Date |
|---|---|
| CN207663143U true CN207663143U (en) | 2018-07-27 |
Family
ID=62937419
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| CN201721378415.8U Withdrawn - After Issue CN207663143U (en) | 2017-10-24 | 2017-10-24 | Eyepiece and wear display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632388A (en) * | 2017-10-24 | 2018-01-26 | 歌尔科技有限公司 | Eyepiece and wear display device |
-
2017
- 2017-10-24 CN CN201721378415.8U patent/CN207663143U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632388A (en) * | 2017-10-24 | 2018-01-26 | 歌尔科技有限公司 | Eyepiece and wear display device |
| CN107632388B (en) * | 2017-10-24 | 2024-04-02 | 歌尔光学科技有限公司 | Eyepiece and head-mounted display device |
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Effective date of registration: 20201116 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 266104 Laoshan Qingdao District North House Street investment service center room, Room 308, Shandong Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |
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