CN104898283B - A kind of eyepiece system and head-mounted display - Google Patents
A kind of eyepiece system and head-mounted display Download PDFInfo
- Publication number
- CN104898283B CN104898283B CN201510270799.0A CN201510270799A CN104898283B CN 104898283 B CN104898283 B CN 104898283B CN 201510270799 A CN201510270799 A CN 201510270799A CN 104898283 B CN104898283 B CN 104898283B
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- eyepiece system
- concave mirror
- light
- head
- fresnel lenses
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Classifications
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- 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
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
-
- 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
Abstract
The invention discloses a kind of eyepiece system and head-mounted display, the eyepiece system includes：Display screen, concave mirror and positive lens groups；Concave mirror, the light for display screen to be sent is reflexed in positive lens groups；Positive lens groups, for the anaclasis of reflecting concave mirror into human eye.The eyepiece system that the present invention is provided employs concave mirror and cooperated with lens group, reduce the volume of eyepiece system, during line convergence is entered to light, concave mirror assume responsibility for a part of focal power of eyepiece system, alleviate focal power requirement of the eyepiece system to lens group, the aberration produced by lens group is not only reduced, the processing materials of lens group are also accordingly reduced；Again because concave mirror will not produce aberration during light is assembled, and then the aberration of eyepiece system can be greatly reduced, improve image quality, reduce the quality and volume of eyepiece system.The eyepiece system is applied to head-mounted display, gives user more perfect visual experience.
Description
Technical field
The present invention relates to visual device technical field, more particularly to a kind of eyepiece system and head-mounted display.
Background technology
At present, continuing to develop with science and technology, head-mounted display enters commercial market, and increasing people begins to use this
Class product, the visual experience of immersion is enjoyed by the eyepiece system in head-mounted display.But, in wearing on the market at present
In the eyepiece system design of display, typically require that lens group undertakes the focal power of whole eyepiece system, it is therefore desirable to many
Individual lens are mutually adapted, and the aberration that multiple lens are produced causes the image quality of eyepiece system to substantially reduce, and causes eyepiece
System integrally has the shortcomings that volume is big and quality is big, and bulky head-mounted display brings very big pressure to the head of user
Power, significantly reduces the experience effect and comfortableness of user.
The content of the invention
In view of the above problems, the invention provides a kind of eyepiece system and head-mounted display, to solve the above problems or
Solve the above problems at least in part.
According to one aspect of the present invention there is provided a kind of eyepiece system, the eyepiece system includes：Display screen, concave surface are anti-
Penetrate mirror and positive lens groups；
The concave mirror, the light for the display screen to be sent is reflexed in the positive lens groups；
The positive lens groups, for the anaclasis of reflecting the concave mirror into human eye.
Alternatively, the positive lens groups are Fresnel Lenses.
Alternatively, the reflecting surface of the concave mirror is concave spherical surface；
The substrate of the Fresnel Lenses is plane, and its light entrance face is convex aspheric surface, and light-emitting face is with positive light
The annular Fresnel surface of focal power.
Alternatively, the aspherical quadratic coefficients of the convex aspheric surface of the Fresnel Lenses are：K2 and K4, meets such as ShiShimonoseki
System：
K2<- 1, K4<-50.
Alternatively, the focal length of the eyepiece system is f, and the focal length of the concave mirror is f1, the Fresnel Lenses
Focal length be f2, meet following relation：
3<f1/f<10；
0.3<f2/f<1.2。
Alternatively, the concave mirror and distance of the display screen on optical axis are L, 20mm<L<40mm.
Alternatively, inclination angle of the concave mirror on the optical axis of the Fresnel Lenses is λ, 30 °<λ<60°.
Alternatively, the Fresnel Lenses uses plastic material, and its refractive index and Abbe number scope are respectively：1.45<n<
1.70,50<v<75.
According to another aspect of the present invention there is provided a kind of head-mounted display, the head-mounted display includes as above any
Eyepiece system described in.
Alternatively, the head-mounted display adjusts the focal length of the eyepiece system within the specific limits；The eyepiece system
Move the operation of the lens group in eyepiece system to realize focus adjustment according to user.
From the foregoing, the eyepiece system that the present invention is provided employs concave mirror and lens in light transmitting procedure
Group is cooperated, and reduces the volume of eyepiece system so that the light that display screen is produced, which is assembled, to be incided in human eye, previous in human eye
The virtual image of upright amplification is formed at set a distance.Wherein, during line convergence is entered to light, concave mirror assume responsibility for mesh
A part of focal power of mirror system, alleviates focal power requirement of the eyepiece system to lens group, not only reduces lens group and produced
Raw aberration, also accordingly reduces the processing materials to lens group；Again due to concave mirror assemble light during not
Can produce aberration, and then the aberration of eyepiece system can be greatly reduced, improve image quality, reduce eyepiece system quality and
Volume.The eyepiece system is applied to head-mounted display, gives user more perfect visual experience.
Brief description of the drawings
Fig. 1 shows a kind of schematic diagram of eyepiece system according to an embodiment of the invention；
Fig. 2A shows the schematic diagram of Fresnel Lenses according to an embodiment of the invention；
Fig. 2 B show the according to an embodiment of the invention and equivalent ordinary lenses of Fresnel Lenses schematic diagrames；
Fig. 3 shows the point range figure of eyepiece system according to an embodiment of the invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 shows a kind of schematic diagram of eyepiece system according to an embodiment of the invention.As shown in figure 1, the eyepiece
System includes：Display screen 110, concave mirror 120, positive lens groups 130 and diaphragm 140.Concave mirror 120 is by display screen
110 light sent are reflexed in positive lens groups 130；The anaclasis that positive lens groups 130 reflect concave mirror 120 is to diaphragm
In 140；Because the eyes of user are located at diaphragm 140, therefore the light that the eyepiece system shown in Fig. 1 sends display screen 110
It is ultimately incident upon in human eye, forms the virtual image of an amplification at a distance before human eye, human eye finding is the virtual image.
It can be seen that, the eyepiece system shown in Fig. 1 employs concave mirror and lens group phase interworking in light transmitting procedure
Close, reduce the volume of eyepiece system so that display screen produce light assemble incides in human eye, before human eye at a certain distance from
Form the virtual image of upright amplification.Wherein, during line convergence is entered to light, concave mirror assume responsibility for eyepiece system
A part of focal power, alleviates focal power requirement of the eyepiece system to lens group, not only reduces the aberration produced by lens group,
The processing materials of lens group can also accordingly be reduced；Again because concave mirror will not produce aberration during light is assembled,
And then can greatly reduce the aberration of eyepiece system, image quality is improved, the quality and volume of eyepiece system is reduced, to using
The more perfect visual experience of person.
In one embodiment of the invention, the reflecting surface of the concave mirror 120 in the eyepiece system shown in Fig. 1 is recessed
Sphere；Positive lens groups 130 are Fresnel Lenses.In the present embodiment, the whole focal length of the eyepiece system shown in Fig. 1 is f, concave surface
The focal length of speculum 120 is f1, and the focal length of Fresnel Lenses 130 is f2, meets following relation：3<f1/f<10；0.3<f2/f<
1.2.Concave mirror 120 is L, 20mm with distance of the display screen 110 on optical axis<L<40mm.Also, concave mirror 120
Inclination angle on the optical axis of Fresnel Lenses 130 is λ, 30 °<λ<60°.
Fig. 2A shows the schematic diagram of Fresnel Lenses according to an embodiment of the invention, as shown in Figure 2 A, the luxuriant and rich with fragrance alunite
The light entrance face 131 of your lens 130 is convex aspheric surface, and its effect is to make convergence of rays while allowing the outer chief ray of axle to bend towards light
Axle, in the present embodiment, the aspherical quadratic coefficients of the light entrance face 131 are：K2 and K4, meets following relation：K2<- 1, K4
<-50；Light-emitting face 132 is the annular Fresnel surface with positive light coke.Fig. 2 B show according to an embodiment of the invention
The schematic diagram of equivalent ordinary lenses with Fresnel Lenses.As shown in Figure 2 B, the light entrance face 151 of the ordinary lenses 150 be with
The identical convex aspheric surface of light entrance face 131 shown in Fig. 2A, light-emitting face 152 is and the light-emitting face shown in Fig. 2A
132 fully equivalent convex surfaces.Fully equivalent Fresnel Lenses and ordinary lenses shown in comparison diagram 2A and Fig. 2 B, can see
Arrive, compared to ordinary lenses, Fresnel Lenses is by the way that lens are marked off as countless multiple concentric circles lines in series of theories (i.e.
Fresnel-zone, as shown in the light-emitting face 132 in Fig. 2A) identical optical effect is reached, while saving the consumption of material, have
Alleviate to effect the quality and volume of eyepiece system.In one embodiment of the invention, the Fresnel Lenses shown in Fig. 2A is
Processing and fabricating, reduces difficulty of processing, improves processing efficiency on a planar base.
In one embodiment of the invention, the Fresnel Lenses 130 shown in Fig. 2A uses plastic material, its refractive index and
Abbe number scope is respectively：1.45<n<1.70,50<v<75；Specifically, using the plastic material of E48R models, its refractive index and
Abbe number is respectively：N=1.531160, v=56.04.Fresnel Lenses is fabricated by using plastic material, further drop
Low difficulty of processing and processing cost, while reducing the quality of eyepiece system.
Based on each feature described above, the eyepiece system shown in Fig. 1 realizes 50 ° of the angle of visual field, adapts to 5.5 cun aobvious
Display screen, light is sent the virtual image that 5 meters form an amplification at a distance before human eye after eyepiece system is imaged by display screen.
Fig. 3 shows the point range figure of eyepiece system according to an embodiment of the invention, and point range figure ignores diffraction effect, instead
What is reflected is the geometry of optical system imaging.In the point range figure of big aberration system, the distribution of point can approx represent a picture
Energy distribution.Therefore, in image quality evaluation, it can more intuitively reflect and weigh system imaging matter with the dense degree of point range figure
The quality of amount.As can be seen from Figure 3 the aberration of eyepiece system be not it is obvious that other aberrations have also obtained preferable correction, can
To meet the demand that user watches shown image on display screen using eyepiece system.
Present invention also offers a kind of head-mounted display, the head-mounted display includes mesh as above described in any one embodiment
Mirror system.In one embodiment, head-mounted display can adjust the focal length of eyepiece system within the specific limits so that wear aobvious
Show that the eyepiece system in device is applied to myopia population；Specifically, head-mounted display provides for user can move eyepiece system
The pattern of lens group in system, user can actively adjust position of the lens group on optical axis, eyepiece system according to self-demand
System moves the operation of the lens group in eyepiece system according to user to realize focus adjustment, its focal length is adapted to myopia population
Human eye perception.The eyepiece system of the head-mounted display provided based on the parameters of the above eyepiece system, the present invention
The crowd of less than 500 degree of myopia can be applied to.
From the foregoing, the eyepiece system that the present invention is provided employs concave mirror and lens in light transmitting procedure
Group cooperate so that display screen produce light assemble incides in human eye, before human eye at a certain distance from formed it is upright, amplification
The virtual image.Have the advantages that：1st, during line convergence is entered to light, concave mirror assume responsibility for eyepiece system
A part of focal power, alleviates focal power requirement of the eyepiece system to lens group, that is, reduces the aberration produced by lens group；Again
Because concave mirror will not produce aberration during light is assembled, and then the color of eyepiece system can be greatly reduced
Difference, improves image quality.2nd, by using Fresnel Lenses as lens group, lens material can be greatlyd save, eyepiece is reduced
The quality and volume of system.3rd, Fresnel Lenses is processed using planar substrates, and uses plastic material, reduces eyepiece system
The difficulty of processing and processing cost of system, improve processing efficiency.
The eyepiece system is applied to head-mounted display, the quality and volume of head-mounted display is reduced, improves and wear
The image quality of display, reduces the difficulty of processing and processing cost of head-mounted display, still further provides regulation eyepiece
The function of the focal length of system causes head-mounted display to adapt to myopia population.The technical scheme that the present invention is provided is drastically increased
User gives user more perfect visual experience using the experience effect and comfortableness of head-mounted display.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (5)
1. a kind of eyepiece system, it is characterised in that the eyepiece system includes：Display screen, concave mirror and positive lens groups；
The concave mirror, the light for the display screen to be sent is reflexed in the positive lens groups；
The positive lens groups, for the anaclasis of reflecting the concave mirror into human eye；
The positive lens groups are Fresnel Lenses；
The reflecting surface of the concave mirror is concave spherical surface；
The substrate of the Fresnel Lenses is plane, and its light entrance face is convex aspheric surface, and light-emitting face is with positive light coke
Annular Fresnel surface；
The focal length of the eyepiece system is f, and the focal length of the concave mirror is f1, and the focal length of the Fresnel Lenses is f2,
Meet following relation：3<f1/f<10；0.3<f2/f<1.2；
The concave mirror is L, 20mm with distance of the display screen on optical axis<L<40mm；
Inclination angle of the concave mirror on the optical axis of the Fresnel Lenses is λ, 30 °<λ<60°.
2. eyepiece system as claimed in claim 1, it is characterised in that
The aspherical quadratic coefficients of the convex aspheric surface of the Fresnel Lenses are：K2 and K4, meets following relation：
K2<- 1, K4<-50.
3. eyepiece system as claimed in claim 1, it is characterised in that the Fresnel Lenses uses plastic material, it is reflected
Rate and Abbe number scope are respectively：1.45<n<1.70,50<v<75.
4. a kind of head-mounted display, it is characterised in that the head-mounted display includes the mesh as any one of claim 1-3
Mirror system.
5. head-mounted display as claimed in claim 4, it is characterised in that the eyepiece system is according to user's mobile lens group
Focus adjustment is realized in operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510270799.0A CN104898283B (en) | 2015-05-25 | 2015-05-25 | A kind of eyepiece system and head-mounted display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510270799.0A CN104898283B (en) | 2015-05-25 | 2015-05-25 | A kind of eyepiece system and head-mounted display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104898283A CN104898283A (en) | 2015-09-09 |
| CN104898283B true CN104898283B (en) | 2017-09-29 |
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ID=54031030
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510270799.0A Active CN104898283B (en) | 2015-05-25 | 2015-05-25 | A kind of eyepiece system and head-mounted display |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105629479B (en) * | 2016-04-05 | 2018-06-12 | 杭州映墨科技有限公司 | Refraction-reflection for three-dimensional scenic to be presented wears display optical system |
| CN106019568B (en) * | 2016-06-30 | 2018-07-10 | 北京小鸟看看科技有限公司 | A kind of eyepiece system and wear display equipment |
| US10371952B2 (en) | 2016-09-13 | 2019-08-06 | Facebook Technologies, Llc | Fresnel lens with dynamic pitch |
| EP4239378A1 (en) * | 2016-09-13 | 2023-09-06 | Facebook Technologies, LLC | Fresnel lens with dynamic draft for reduced optical artifacts |
| US10379359B2 (en) | 2016-09-13 | 2019-08-13 | Facebook Technologies, Llc | Fresnel lens with dynamic draft for reduced optical artifacts |
| CN106541311B (en) * | 2016-10-13 | 2018-07-13 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of processing method of wedge mirror |
| CN106405820A (en) * | 2016-10-14 | 2017-02-15 | 浙江舜宇光学有限公司 | Eye lens |
| CN107121774B (en) * | 2017-07-14 | 2023-01-13 | 浙江舜宇光学有限公司 | Eyepiece and display device including the same |
| WO2019033284A1 (en) * | 2017-08-15 | 2019-02-21 | 深圳市柔宇科技有限公司 | Head-mounted display device |
| US20210157035A1 (en) * | 2018-07-24 | 2021-05-27 | Nikon Corporation | Ocular optical system and head mounted display |
| CN111458880B (en) * | 2020-05-09 | 2022-04-22 | 三生万物(北京)人工智能技术有限公司 | Waveguide light field display device and head-mounted augmented reality glasses |
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| CN104898283A (en) | 2015-09-09 |
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Effective date of registration: 20201010 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: International Exhibition Center of wealth 18 No. 266061 Shandong province Qingdao city Laoshan District No. 3 Qinling Mountains Road, building 5 floor Patentee before: Qingdao GoerTek Technology Co.,Ltd. |
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