CN107167913A - A kind of short focus eyepiece and VR wear display device - Google Patents
A kind of short focus eyepiece and VR wear display device Download PDFInfo
- Publication number
- CN107167913A CN107167913A CN201611163568.0A CN201611163568A CN107167913A CN 107167913 A CN107167913 A CN 107167913A CN 201611163568 A CN201611163568 A CN 201611163568A CN 107167913 A CN107167913 A CN 107167913A
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- Prior art keywords
- fresnel lenses
- eyepiece
- aspherical lens
- focal length
- short focus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000463 material Substances 0.000 claims description 13
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 2
- 210000001747 pupil Anatomy 0.000 description 9
- 230000004075 alteration Effects 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012634 optical imaging Methods 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
-
- 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
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- 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
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
-
- 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
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
- G02B2027/0116—Head-up displays characterised by optical features comprising device for genereting colour display comprising devices for correcting chromatic aberration
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention is more specifically a kind of virtual reality goggles, small-size screen can be coordinated to use；Meanwhile, wear display device the invention further relates to a kind of VR for coordinating small-size screen to use.A kind of short focus eyepiece, the eyepiece is formed by the Fresnel lenses positioned at nearly eye end and the aspherical lens stack combinations positioned at outer end；The maximum gauge of Fresnel lenses maximum gauge and aspherical lens is below 6mm；The Fresnel surface of Fresnel lenses is located at the not easily seen face of Fresnel lenses；The Fresnel lenses requirement：Focal length F=18mm~30mm；Refractive index Nd=1.4~1.6；Abbe number Vd=40~68；The aspherical lens requirement：Focal length F=200mm~∞；Refractive index Nd=1.52~1.7；Abbe number Vd=20~45.The advantage of the invention is that close-coupled, short focus, and eyepiece can accomplish overall less than 12mm, and focal length accomplishes that below 20mm still can ensure the image quality of superelevation.
Description
Technical field
The invention belongs to near-eye display system field, more specifically a kind of virtual reality goggles can coordinate small-size screen
Use；Meanwhile, wear display device the invention further relates to a kind of VR for coordinating small-size screen to use.
Background technology
Virtual reality device can create the computer simulation system with the experiencing virtual world, and it utilizes computer generation one
Simulated environment is planted, the Three-Dimensional Dynamic what comes into a driver's of interactive mode is formed using Multi-source Information Fusion, user is immersed in the environment.But
Existing virtual reality display device is bulky, and these equipment give people heavy sensation, and lens are thicker, and equipment compares
Weight, lens are excessive to screen distance, and equipment volume is excessive, not readily portable, if long-time band is on eyes, can give people burden
Sense, the skin of forceful contact brings discomfort.
For current virtual reality (VR) helmet product, most appearance and size is all than larger, and quality is heavier, serious
Influence Consumer's Experience, this be also VR currently without it is widely accepted the reason for one of.Therefore, small-size screen and short is only used
TTL can be only achieved requirement, and small-size screen and short TTL require that eyepiece has short focus.But the focal length of eyeglass is shorter,
The aberration brought will be more, and single eyeglass can not meet design requirement at all, and will increase weight using many eyeglasses, while mirror
The integral thickness of piece group can not necessarily reduce TTL.Therefore, eyeglass focal length how is reduced to be particularly important.
The content of the invention
Based on above-mentioned technical problem, first technical problem to be solved by this invention is to provide a kind of compact
Formula, short focus eyepiece, the eyepiece can accomplish overall less than 12mm, and focal length accomplishes that below 20mm still can ensure superelevation
Image quality；
Second technical problem to be solved by this invention is to provide a kind of VR for applying above-mentioned short focus eyepiece to make
Wear display device.
In order to solve above-mentioned technical problem to be solved, the present invention is adopted the following technical scheme that：
A kind of short focus eyepiece, the eyepiece is by the Fresnel lenses and the aspherical lens positioned at outer end positioned at nearly eye end
Stack combinations are formed；The maximum gauge of Fresnel lenses maximum gauge and aspherical lens is below 6mm；The phenanthrene of Fresnel lenses
Nie Er faces are located at the not easily seen face of Fresnel lenses；The Fresnel lenses requirement：Focal length F=18mm~30mm；Refractive index Nd=
1.4~1.6；Abbe number Vd=40~68；The aspherical lens requirement：Focal length F=200mm~∞；Refractive index Nd=1.52
~1.7；Abbe number Vd=20~45.
Further, the superposition maximum gauge of the Fresnel lenses and aspherical lens is less than 11.5mm.
Further, Fresnel lenses use PMMA materials；Aspherical lens select one kind in following material：PC、PS、
EP or OKP.
Further, the Fresnel lenses requirement：Focal length F=22mm~28mm；Refractive index Nd=1.4~1.6；Abbe
Number Vd=44~68；The aspherical lens requirement：Focal length F=400~∞；Refractive index Nd=1.52~1.65；Abbe number Vd
=20~44.Wherein, the Vd of two kinds of materials difference is bigger, and effect can be better.
Further, the TTL when short focus eyepiece is applied can be controlled between 18-30mm.TTL is from eyeglass first
Surface is to the distance of screen cover, and the TTL of eyepiece of the invention in application can be controlled in 30mm, still keep imaging well and
Visual effect.
A kind of VR wears display device, includes the eyepiece of above-mentioned technical proposal.
Compared with existing eyepiece, short focus eyepiece of the invention has the advantages that：
First, short focus eyepiece of the invention, the composition structure of eyepiece is：Fresnel lenses add aspherical lens.Fresnel
The maximum gauge of eyeglass maximum gauge and aspherical lens is below 6mm, and Fresnel lenses and aspherical lens are using upper
After the parameter stated, it can be on the premise of quality of optical imaging be ensured, focal length accomplishes below 20mm.Apply and small size
When screen and short TTL VR wear display device, it still can ensure the image quality of superelevation.Finally cause eyepiece system weight
Amount and thickness are substantially reduced.
2nd, wherein first Fresnel lenses are located at internal i.e. near eye end, and user can not touch Fresnel surface, fully examine
The protection to Fresnel surface is considered；Fresnel lenses undertake main focal power, and its focal length (F) is 18mm~30mm；Fresnel
The material present invention of eyeglass preferably selects PMMA materials, and the material specific outstanding mobility and stability are easily manufactured.
3rd, second aspherical lens act as correction system aberration, while controlling CRA, can effectively control imaging
Round size, high matching degree is reached with screen.
4th, eyepiece of the invention has outstanding tolerance width, and in pupil skew ± 3mm, pupil is moved up and down necessarily
Apart from when can equally see screen clearly.
5th, eyepiece of the invention has distortion and the aberration of effective correction system；The distortion of system is big according to screen size
It is small change and change, screen is bigger, distortion correction it is better, screen is smaller, and distortion can accordingly increase, but it is worst also can be with existing
The mono- eyeglasses of VR distortion maintain an equal level.
Brief description of the drawings
Fig. 1：The structural representation of eyepiece in the embodiment of the present invention.
Fig. 2：The index path of eyepiece in the embodiment of the present invention.
Fig. 3：MTF curve figure in the embodiment of the present invention in the eyepiece opticses impact of performance.
Fig. 4：The curvature of field and distortion schematic diagram in the embodiment of the present invention in the eyepiece opticses impact of performance.
Fig. 5：Point range figure in the embodiment of the present invention in the eyepiece opticses impact of performance.
Fig. 6：Lateral chromatic aberration schematic diagram in the embodiment of the present invention in the eyepiece opticses impact of performance.
Fig. 7：Optics road schematic diagram of the eyepiece in pupil skew ± 3mm in the embodiment of the present invention.
Fig. 8：In pupil skew ± 3mm, the MTF curve figure in the embodiment of the present invention in the eyepiece opticses impact of performance.
Fig. 9：In pupil skew ± 3mm, the curvature of field and distortion in the embodiment of the present invention in the eyepiece opticses impact of performance are shown
It is intended to.
Figure 10：In pupil skew ± 3mm, the lateral chromatic aberration signal in the embodiment of the present invention in the eyepiece opticses impact of performance
Figure.
Figure 11：MTF curve figure in the embodiment of the present invention when human eye moves up and down ± 4mm.
Embodiment
Above is the citing to technical solution of the present invention is described in detail, it is impossible to be used as the restriction of the scope of the present invention.
Embodiment 1：As depicted in figs. 1 and 2, the composition structure of eyepiece of the invention is：Fresnel lenses add aspherical mirror
Piece.The center thickness of every eyeglass of Fresnel lenses and aspherical lens adds center thickness all in below 6mm, overall thick
Degree is again smaller than 11.5mm, approximately less than general VR simple lenses thickness (non-spherical lens).
On the premise of quality of optical imaging is ensured, focal length needs accomplish how many, according to the size of specific screen because
Need to consider imaging circle size and magnifying power etc.；According to adjustment material, focal length accomplishes that below 20mm still can ensure superelevation
Image quality is difficult to accomplish in the prior art.
Eyepiece concrete structure and index path as shown in Figure 1 and Figure 2, wherein above-mentioned Fresnel lenses are located at nearly eye end,
Aspherical lens are located at outer end.And the Fresnel surface of Fresnel lenses is located at not easily seen face, the i.e. inner face close to aspherical lens.Such as
Shown in Fig. 2, it is to be imaged circleThe parameter designed exemplified by (can coordinate more than 1.8 cun of screens)：Eyepiece system focal length：
23mm；Imaging circle：Eye relief：≥12mm；Clear aperture：43mm；FOV：≥100°；In Fig. 2 light paths
Scheme as follows, reference：
1：The first of Fresnel lenses is aspherical；2：Fresnel surface；3：The first of aspherical lens is aspherical；4：It is aspherical
The second of eyeglass is aspherical；5：Entrance pupil；6：Image planes.
Wherein, image planes 6 are screen.After Fresnel lenses and aspherical lens superposition, from nearly eye end to remote eye end, Fei Nie
You have the first aspherical 1 of Fresnel lenses by the most inner face of eyeglass, and its reverse side is the Fresnel surface 2 of Fresnel lenses, is located at
The not easily seen face of Fresnel lenses, that is, close to the inner face of aspherical lens, the inner face of aspherical lens is aspherical lens
First aspherical 3, the outermost of aspherical lens is the second aspherical 4 of aspherical lens.Light is sent from image planes 6, is passed through successively
Cross second aspherical 4, the first aspherical 3 of aspherical lens, the first of Fresnel surface 2 and Fresnel lenses of aspherical lens
Aspherical 1.
Wherein first inner Fresnel lenses undertake main focal power, and its focal length (F) is 21mm；Fresnel surface is set
Internally, user can not touch Fresnel surface, take into full account the protection to Fresnel surface；For design itself, material
The selection of material is broad, but is limited to current Fresnel lenses manufacture craft, therefore selects PMMA materials, mainly due to
Its outstanding mobility and stability, if can realize other materials injection molding Fresnel lenses in technique, can equally be selected
With.
The present embodiment is respectively to the refractive index and Abbe number of Fresnel lenses parameter request：Nd=1.4~1.6；Vd=
40~68；
Second aspherical lens act as correction system aberration, while controlling CRA, can effectively control imaging circle
Size, high matching degree is reached with screen.Its focal length (F) is：401mm, refractive index and Abbe number are：Nd=1.52~1.7；
Vd=20~45.Due to aspherical moulding process comparative maturity, its optional scope is relatively wide, such as：PC, PS, EP series, OKP
Series etc. has low Abbe number.
As shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the MTF curve figure of the present embodiment eyepiece system, curvature of field distortion curve figure, point
Row figure, lateral chromatic aberration curve map can be seen that them on existing single eyeglass eyepiece.While FOV >=100 °；Focal length is
23mm；And the aspherical lens focal length of general monolithic VR glasses is 37mm or so.
As shown in Fig. 7, Fig. 8, Fig. 9 and Figure 10, MTF curve figure, curvature of field distortion curve figure, lateral chromatic aberration curve map can be seen
Go out, in pupil skew ± 3mm, the optical property of eyepiece system changes and little；Illustrate when human eye is watching screen, up and down
During movement ± 3mm, do not feel；Showing the eyepiece system of the present embodiment has outstanding tolerance width, i.e., moved down on pupil
It can equally see screen clearly during dynamic certain distance.
MTF figures during ± 4mm are moved up and down for human eye such as Figure 11, as seen from Figure 11, when human eye moves up and down 4mm
Optical property just has decline.
The effect reached above is to be imaged circleThe result designed exemplified by (coordinating 1.8 cun~2.3 cun screens), is used
The imaging circle scope of this result design：Coordinate screen size：1.5 cun~2.89 cun.
Embodiment 2：
The composition structure of eyepiece of the present invention is：By the Fresnel lenses and the aspherical mirror positioned at outer end positioned at nearly eye end
Piece stack combinations are formed；The maximum gauge of Fresnel lenses maximum gauge and aspherical lens is below 6mm；Fresnel lenses
Fresnel surface is located at the not easily seen face of Fresnel lenses；
Eyepiece system whole focal length：30mm；
Fresnel lenses requirement：Focal length F=30mm；Refractive index Nd=1.49；Abbe number Vd=57；Aspherical lens will
Ask：Focal length F=∞；Refractive index Nd=1.59；Abbe number Vd=29.
Embodiment 3：
The composition structure of eyepiece of the present invention is：By the Fresnel lenses and the aspherical mirror positioned at outer end positioned at nearly eye end
Piece stack combinations are formed；The maximum gauge of Fresnel lenses maximum gauge and aspherical lens is below 6mm；Fresnel lenses
Fresnel surface is located at the not easily seen face of Fresnel lenses；
Eyepiece system whole focal length：28mm；
Fresnel lenses requirement：Focal length F=28mm；Refractive index Nd=1.44；Abbe number Vd=55；Aspherical lens will
Ask：Focal length F=∞；Refractive index Nd=1.58；Abbe number Vd=29.
Embodiment 4：
The composition structure of eyepiece of the present invention is：By the Fresnel lenses and the aspherical mirror positioned at outer end positioned at nearly eye end
Piece stack combinations are formed；The maximum gauge of Fresnel lenses maximum gauge and aspherical lens is below 6mm；Fresnel lenses
Fresnel surface is located at the not easily seen face of Fresnel lenses；
Eyepiece system whole focal length：28mm；
Fresnel lenses requirement：Focal length F=26mm；Refractive index Nd=1.44；Abbe number Vd=55；Aspherical lens will
Ask：Focal length F=1000mm；Refractive index Nd=1.61；Abbe number Vd=32.
Above-described embodiment 1-4 can not only be applied to VR and wear on display device, simultaneously because its high-resolution can also
Apply on some other optical instruments.
Embodiment 5：A kind of VR wears display device, is made of embodiment 1-4 eyepiece.
Claims (6)
1. a kind of short focus eyepiece, it is characterised in that：The eyepiece is by the Fresnel lenses positioned at nearly eye end and positioned at outer end
Aspherical lens stack combinations are formed；The maximum gauge of Fresnel lenses maximum gauge and aspherical lens is below 6mm；Fei Nie
The Fresnel surface of your eyeglass is located at the not easily seen face of Fresnel lenses；
The Fresnel lenses requirement：Focal length F=18mm~30mm；Refractive index Nd=1.4~1.6；Abbe number Vd=40~68；
The aspherical lens requirement：Focal length F=200mm~∞；Refractive index Nd=1.52~1.7；Abbe number Vd=20~45.
2. a kind of short focus eyepiece according to claim 1, it is characterised in that：The Fresnel lenses and aspherical lens
Superposition maximum gauge be less than 11.5mm.
3. a kind of short focus eyepiece according to claim 1, it is characterised in that：Fresnel lenses use PMMA materials；It is non-
Spheric glass selects one kind in following material：PC, PS, EP or OKP.
4. a kind of short focus eyepiece according to claim 1, it is characterised in that：The Fresnel lenses requirement：Focal length F=
22mm~28mm；Refractive index Nd=1.4~1.6；Abbe number Vd=44~68；The aspherical lens requirement：Focal length F=400
~∞；Refractive index Nd=1.52~1.65；Abbe number Vd=20~44.
5. a kind of short focus eyepiece according to claim 1, it is characterised in that：TTL when the short focus eyepiece is applied
It can control between 18-30mm.
6. a kind of VR wears display device, it is characterised in that：Include the eyepiece of claim 1-5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611163568.0A CN107167913A (en) | 2016-12-15 | 2016-12-15 | A kind of short focus eyepiece and VR wear display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611163568.0A CN107167913A (en) | 2016-12-15 | 2016-12-15 | A kind of short focus eyepiece and VR wear display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107167913A true CN107167913A (en) | 2017-09-15 |
Family
ID=59848760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611163568.0A Pending CN107167913A (en) | 2016-12-15 | 2016-12-15 | A kind of short focus eyepiece and VR wear display device |
Country Status (1)
| Country | Link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109739022A (en) * | 2019-03-19 | 2019-05-10 | 长春理工大学 | A kind of double-disk VR eyeglass |
| CN110426847A (en) * | 2018-04-06 | 2019-11-08 | 脸谱科技有限责任公司 | Head-mounted display, lens and its configuration method for head-mounted display |
| TWI760849B (en) * | 2018-09-20 | 2022-04-11 | 玉晶光電股份有限公司 | Ocular optical system |
| TWI782873B (en) * | 2018-09-20 | 2022-11-01 | 玉晶光電股份有限公司 | Ocular optical system |
| TWI804435B (en) * | 2018-09-20 | 2023-06-01 | 玉晶光電股份有限公司 | Ocular optical system |
| WO2024022407A1 (en) * | 2022-07-28 | 2024-02-01 | 京东方科技集团股份有限公司 | Eyepiece system and near-eye display device |
-
2016
- 2016-12-15 CN CN201611163568.0A patent/CN107167913A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426847A (en) * | 2018-04-06 | 2019-11-08 | 脸谱科技有限责任公司 | Head-mounted display, lens and its configuration method for head-mounted display |
| TWI760849B (en) * | 2018-09-20 | 2022-04-11 | 玉晶光電股份有限公司 | Ocular optical system |
| TWI782873B (en) * | 2018-09-20 | 2022-11-01 | 玉晶光電股份有限公司 | Ocular optical system |
| TWI804435B (en) * | 2018-09-20 | 2023-06-01 | 玉晶光電股份有限公司 | Ocular optical system |
| CN109739022A (en) * | 2019-03-19 | 2019-05-10 | 长春理工大学 | A kind of double-disk VR eyeglass |
| WO2024022407A1 (en) * | 2022-07-28 | 2024-02-01 | 京东方科技集团股份有限公司 | Eyepiece system and near-eye display device |
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Application publication date: 20170915 |
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