CN106019596B - A kind of optical system showing equipment for virtual reality - Google Patents
A kind of optical system showing equipment for virtual reality Download PDFInfo
- Publication number
- CN106019596B CN106019596B CN201610602655.5A CN201610602655A CN106019596B CN 106019596 B CN106019596 B CN 106019596B CN 201610602655 A CN201610602655 A CN 201610602655A CN 106019596 B CN106019596 B CN 106019596B
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- fresnel lenses
- mold
- lens
- virtual reality
- optical system
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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
- G02B27/0101—Head-up displays characterised by optical features
-
- 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
-
- 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
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a kind of optical systems that equipment is shown for virtual reality, including positive and negative lenses, positive lens is located at close to the side of position of human eye, negative lens is located at close to the side of display screen, diffraction optical element is arranged in the near-eye side of positive lens, and Fresnel Lenses is arranged in the nearly display screen side of positive lens.The manufacturing method of Fresnel Lenses includes: step 1: the Fresnel Lenses facewidth as needed or tooth pitch, customizes Fresnel Lenses mold；Step 2: step 1 gained Fresnel Lenses mold being packed into injection molding machine, mold is preheated；Step 3: when mold temperature reaches 90 DEG C -140 DEG C, the injecting systems for controlling injection molding machine will be in the PC of fusing or PMMA injection Fresnel Lenses mold；Step 4: cooling to the mold of step 3, demoulding obtains finished product.The high quality optical effect of the big visual field of a kind of optical system that equipment is shown for virtual reality of the present invention, available achromatism and the distortion that disappears, entire optical system bore is big and length is short.
Description
Technical field
The present invention relates to technical field of optical more particularly to a kind of optical systems that equipment is shown for virtual reality
System.
Background technique
As virtual reality technology is various in military simulation, industrial simulation, digital city, digital entertainment and e-commerce etc.
The extensive use in field, various virtual reality products emerge one after another currently on the market.Wherein it is applied to virtual implementing helmet to show
The optical system of equipment is main or the combination of positive and negative lenses, and face type is mainly spherical surface, aspherical or free form surface.
When using this kind of optical system, for the feeling of immersion brought to user, needs to shorten system focal length to increase visual field, shorten
Focal length can make dispersion and distortion aggravate, and the image quality of whole system is bad.To solve this problem, those skilled in the art
Improve the quality of imaging by the quantity or the quantity of negative lens that increase convex lens, and increases lens number and will lead to entirely
System length increases, inconvenient for use, and if shortening the distance between lens, to achieve the purpose that shorten system length, then
System bore is done less, and visual field is difficult to scale up, still can not be to the feeling of immersion that user has brought.
Summary of the invention
The object of the present invention is to provide a kind of optical systems that equipment is shown for virtual reality, solve existing virtual reality
Show the optical system of equipment it is existing using conventional lenses cannot obtain simultaneously high imaging quality and shorter system length with
And the technical issues of heavy caliber big visual field.
In order to achieve the above object, the invention provides the following technical scheme: a kind of light for showing equipment for virtual reality
Diffraction optical element is arranged in the near-eye side of system, including positive and negative lenses, the positive lens, and the negative lens is negative curved
Month lens, the concave surface of the diverging meniscus lens is located at nearly display screen side.
In a preferred embodiment, Fresnel Lenses, the phenanthrene alunite is arranged in the nearly display screen side of the positive lens
The substrate of your lens is plane or spherical surface or aspherical or free form surface.
In a preferred embodiment, the substrate of the diffraction optical element be plane or spherical surface it is aspherical or from
By curved surface.
In a preferred embodiment, the surface relief structure of the diffraction optical element be continuous relief structure or
Multistage embossment structure or Fresnel type structure.
In a preferred embodiment, the negative lens is between positive lens and display screen, the positive lens position
In close to human eye side.
In a preferred embodiment, the surface of the diverging meniscus lens be spherical surface or aspherical or free form surface or
Diffractive optical surfaces.
In a preferred embodiment, the Fresnel Lenses is to wait tooth pitches Fresnel Lenses, and the tooth pitch is
0.2mm-1mm。
In a preferred embodiment, the Fresnel Lenses be etc. facewidth Fresnel Lenses, the facewidth be
0.2mm-1mm。
In a preferred embodiment, the Fresnel Lenses manufacturing method the following steps are included:
Step 1: the Fresnel Lenses facewidth as needed or tooth pitch customize Fresnel Lenses mold；
Step 2: step 1 gained Fresnel Lenses mold being packed into injection molding machine, mold is preheated, preheating time is
10s-20s, preheating temperature are not less than 80 DEG C；
Step 3: when mold temperature reaches 90 DEG C -140 DEG C, controlling PC or PMMA of the injecting systems by fusing of injection molding machine
It injects in Fresnel Lenses mold；
Step 4: the mold of step 3 being cooled down, cooling temperature is 10 DEG C -40 DEG C, and cooling time, 50s-130s, demoulded
Obtain finished product.
In a preferred embodiment, the Fresnel Lenses mold includes groove type substrate and template, described recessed
Equally spaced groove is arranged in the inner bottom surface of flute profile substrate, and the template-setup makes the mould in the groove type upper surface of substrate
Cavity is formed between plate and the groove type substrate.
A kind of optical system that equipment is shown for virtual reality of the present invention, compared with prior art, it has the advantage that:
Firstly, diffraction optical element is arranged in the near-eye side of positive lens, using the special dispersion characteristics of diffraction optical element, with
Conventional lenses composition rolls over the hybrid lens that spread out, and not only can reduce the curvature of refractive element but also can effectively eliminate color difference, distortion
Deng raising image quality.Fresnel Lenses is arranged in the nearly display screen side of positive lens, may be implemented to be thinned, mainly passes through geometry
It is optical refraction and play lensing, in thickness direction or the equally spaced division of radial direction.Use Fresnel Lenses can be with
Increase bore without increasing convex lens center thickness, can further shorten focal length and increase visual field, focal range of the invention can
To reach 25mm-80mm, field range can reach 70 ° -125 °, simultaneously, it is possible to reduce weight shortens the length of whole system.
Diverging meniscus lens is set between positive lens and display screen, can be further reduced distortion, so that distortion drops within 5%.
The high quality optical effect of the available achromatism of optical system provided by the invention and the big visual field for the distortion that disappears, entire optical system
System bore is big and length is short, and lens numbers used are few, small in size, light weight and cost is low.
Secondly, Fresnel Lenses in the present invention can be equal tooth pitches Fresnel Lenses, or etc. facewidth Fresnel
Lens.Equal tooth pitches wait the Fresnel Lenses of the facewidth to can achieve (reflection or refraction) logical to the light belt of specified spectral region
Effect, to enhance optically focused.It is demonstrated experimentally that spotlight effect is best when the range of tooth pitch or the facewidth is 0.2mm-1mm.
Finally, the manufacturing method of Fresnel Lenses used in being given in the present invention, the phenanthrene alunite as made from this method
Your lens, spotlight effect is good, strong shock resistance, is applied to virtual reality and shows in the optical system of equipment, Ke Yida
To good effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of light path schematic diagram for the optical system that equipment is shown for virtual reality of the present invention；
Fig. 2 is a kind of distortion curve schematic diagram for the optical system that equipment is shown for virtual reality of the present invention.
In figure, 1. positive lens, 2. position of human eye, 3. display screens, 4. negative lenses.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical solution of the present invention is clearly and completely described.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
According to Fig. 1, in one embodiment of the invention, it discloses and a kind of to show equipment for virtual reality
The structure of optical system, including positive lens 1 and negative lens 4, positive lens 1 be located at close to position of human eye 2 side, negative lens 4
In the side close to display screen 3.Wherein, diffraction optical element is arranged in the near-eye side of positive lens 1, and the nearly display screen side of positive lens is set
Fresnel Lenses is set, wherein diffraction optical element includes plane or spherical surface or aspherical or free form surface substrate, diffraction optics
The surface relief structure of element is continuous relief structure or multistage embossment structure or Fresnel type structure.Wherein, Fresnel Lenses
Substrate be plane or spherical surface or aspherical or free form surface.Negative lens 4 is diverging meniscus lens, and the concave surface of diverging meniscus lens is located at
Close to the side of display screen 3, convex surface is located at close to 1 side of positive lens, the surface of diverging meniscus lens be spherical surface it is aspherical or from
By curved surface or diffractive optical surfaces.Diffraction optical element is using photoetching process processing and injection molding.Fresnel Lenses is to wait teeth
Away from perhaps waiting facewidth Fresnel Lenses tooth pitch or facewidth range to be 0.2mm-1mm.Equal tooth pitches or the Fresnel for waiting the facewidth
Lens can achieve the effect of (reflection or refraction) logical to the light belt of specified spectral region, to enhance optically focused.Fresnel is saturating
The area ratio of mirror and positive lens is 1:1.2, which can reach effective optically focused on the basis of saving Fresnel Lenses
Effect reduces the light reflected into eyeground, reduces the stimulation for eyeground, avoids eye is dry and astringent from happening.And compared by this
Example is assembled, and overall ratio is more reasonable, in conjunction with more consolidation, this optical system is made to have good impulse-durability effect.Separately
Outside since Fresnel Lenses price is higher, the setting of the ratio, it will reduce cost.
In one embodiment of the invention, Fresnel Lenses manufacturing method the following steps are included:
Step 1: the Fresnel Lenses facewidth as needed or tooth pitch customize Fresnel Lenses mold；
Step 2: step 1 gained Fresnel Lenses mold being packed into injection molding machine, mold is preheated, preheating time is
10s, preheating temperature are 110 DEG C；
Step 3: when mold temperature reaches 90 DEG C, the PC of fusing or PMMA is injected phenanthrene by the injecting systems for controlling injection molding machine
In Nie Er lens die；
Step 4: the mold of step 3 being cooled down, cooling temperature is 10 DEG C, and 60s, demoulded and obtained finished product cooling time.
Wherein, Fresnel Lenses mold includes groove type substrate and template, the tooth pitches such as inner bottom surface setting of groove type substrate
Groove, template-setup makes to form cavity between template and groove type substrate in groove type upper surface of substrate.
In one embodiment of the invention, Fresnel Lenses manufacturing method the following steps are included:
Step 1: the Fresnel Lenses facewidth as needed or tooth pitch customize Fresnel Lenses mold；
Step 2: step 1 gained Fresnel Lenses mold being packed into injection molding machine, mold is preheated, preheating time is
20s, preheating temperature are 80 DEG C；
Step 3: when mold temperature reaches 140 DEG C, the injecting systems for controlling injection molding machine inject the PC of fusing or PMMA
In Fresnel Lenses mold；
Step 4: the mold of step 3 being cooled down, cooling temperature is 20 DEG C, and 110s, demoulded and obtained into cooling time
Product.
Wherein, Fresnel Lenses mold includes groove type substrate and template, the tooth pitches such as inner bottom surface setting of groove type substrate
Groove, template-setup makes to form cavity between template and groove type substrate in groove type upper surface of substrate.
In one embodiment of the invention, Fresnel Lenses manufacturing method the following steps are included:
Step 1: the Fresnel Lenses facewidth as needed or tooth pitch customize Fresnel Lenses mold；
Step 2: step 1 gained Fresnel Lenses mold being packed into injection molding machine, mold is preheated, preheating time is
15s, preheating temperature are 100 DEG C；
Step 3: when mold temperature reaches 110 DEG C, the injecting systems for controlling injection molding machine inject the PC of fusing or PMMA
In Fresnel Lenses mold；
Step 4: the mold of step 3 being cooled down, cooling temperature is 40 DEG C, and 130s, demoulded and obtained finished product cooling time.
Wherein, Fresnel Lenses mold includes groove type substrate and template, the tooth pitches such as inner bottom surface setting of groove type substrate
Groove, template-setup makes to form cavity between template and groove type substrate in groove type upper surface of substrate.
In use, the image on display screen 3 is imaged through negative lens 4 and positive lens 1, the virtual image of the eye-observation to amplification.By
Diffraction optical element is set in the near-eye side of positive lens 1, since diffraction optical element has opposite color with conventional refractive lens
Dissipate rule, therefore, set diffraction optical element for a surface of positive lens, not only can reduce the curvature of refractive element and
And can effectively eliminate color difference, distortion etc., so that image quality improves a lot.Distortion curve of the invention as shown in Fig. 2, from
As can be seen that distortion can drop within 5% in figure.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. a kind of optical system for showing equipment for virtual reality, including positive and negative lenses, it is characterised in that: it is described just
Diffraction optical element is arranged in the near-eye side of lens, and the negative lens is diverging meniscus lens, and the concave surface of the diverging meniscus lens is located at
Nearly display screen side；
Fresnel Lenses is arranged in the nearly display screen side of the positive lens, and the substrate of the Fresnel Lenses is plane or spherical surface or non-
Spherical surface or free form surface；
Between positive lens and display screen, the positive lens is located at close to human eye side the negative lens.
2. a kind of optical system for showing equipment for virtual reality according to claim 1, it is characterised in that: described to spread out
The substrate for penetrating optical element is plane or spherical surface or aspherical or free form surface.
3. a kind of optical system for showing equipment for virtual reality according to claim 1, it is characterised in that: described to spread out
The surface relief structure for penetrating optical element is continuous relief structure or multistage embossment structure or Fresnel type structure.
4. a kind of optical system for showing equipment for virtual reality according to claim 1, it is characterised in that: described negative
The surface of lens is spherical surface or aspherical or free form surface or diffractive optical surfaces.
5. a kind of optical system for showing equipment for virtual reality according to claim 1, it is characterised in that: the phenanthrene
Nie Er lens are to wait tooth pitches Fresnel Lenses, and the tooth pitch is 0.2mm-1mm.
6. a kind of optical system for showing equipment for virtual reality according to claim 1, it is characterised in that: the phenanthrene
Nie Er lens be etc. facewidth Fresnel Lenses, the facewidth be 0.2mm-1mm.
7. a kind of optical system for showing equipment for virtual reality according to claim 5 or 6, it is characterised in that: institute
State the manufacturing method of Fresnel Lenses the following steps are included:
Step 1: the Fresnel Lenses facewidth as needed or tooth pitch customize Fresnel Lenses mold；
Step 2: step 1 gained Fresnel Lenses mold being packed into injection molding machine, mold is preheated, preheating time 10s-
20s, preheating temperature are not less than 80 DEG C；
Step 3: when mold temperature reaches 90 DEG C -140 DEG C, the injecting systems for controlling injection molding machine inject the PC of fusing or PMMA
In Fresnel Lenses mold；
Step 4: the mold of step 3 is cooled down, cooling temperature is 10 DEG C -40 DEG C, cooling time 50s-130s, demoulding obtains
Finished product.
8. a kind of optical system for showing equipment for virtual reality according to claim 7, it is characterised in that: the phenanthrene
Nie Er lens die includes groove type substrate and template, and equally spaced groove is arranged in the inner bottom surface of the groove type substrate, described
Template-setup makes to form cavity between the template and the groove type substrate in the groove type upper surface of substrate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016206157383 | 2016-06-21 | ||
| CN201620615738 | 2016-06-21 |
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| Publication Number | Publication Date |
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| CN106019596A CN106019596A (en) | 2016-10-12 |
| CN106019596B true CN106019596B (en) | 2019-01-04 |
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| CN201610602655.5A Active CN106019596B (en) | 2016-06-21 | 2016-07-28 | A kind of optical system showing equipment for virtual reality |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106444262A (en) * | 2016-10-31 | 2017-02-22 | 海信集团有限公司 | Rear projection system and rear projection equipment thereof |
| CN206541039U (en) * | 2016-12-22 | 2017-10-03 | 深圳超多维科技有限公司 | A kind of Fresnel Lenses and virtual reality 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 |
| CN109061888A (en) * | 2018-09-26 | 2018-12-21 | 深圳珑璟光电技术有限公司 | A kind of lighting device |
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| WO2011039119A1 (en) * | 2009-09-29 | 2011-04-07 | Carl Zeiss Ag | Display device having a fresnel structure |
| CN104280877A (en) * | 2014-10-28 | 2015-01-14 | 成都贝思达光电科技有限公司 | Refraction and diffraction mixed eyepiece used for video glasses |
| CN104536129A (en) * | 2014-12-17 | 2015-04-22 | 青岛歌尔声学科技有限公司 | Micro-display eye lens, head-mounted eye lens system and head-mounted visual equipment |
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2016
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|---|---|---|---|---|
| CN1959441A (en) * | 2006-11-01 | 2007-05-09 | 胡允楷 | New type lens, fabricating technique, and fabrication die |
| WO2011039119A1 (en) * | 2009-09-29 | 2011-04-07 | Carl Zeiss Ag | Display device having a fresnel structure |
| CN104280877A (en) * | 2014-10-28 | 2015-01-14 | 成都贝思达光电科技有限公司 | Refraction and diffraction mixed eyepiece used for video glasses |
| CN104536129A (en) * | 2014-12-17 | 2015-04-22 | 青岛歌尔声学科技有限公司 | Micro-display eye lens, head-mounted eye lens system and head-mounted visual equipment |
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| CN106019596A (en) | 2016-10-12 |
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Address after: No.159, Tengfei 2nd Road, Southwest Airport Economic Development Zone, Shuangliu District, Chengdu Patentee after: CHENGDU HAN DE SHENG BANG OPTICAL Co.,Ltd. Address before: 610200, No. two, No. 159, Tengfei Economic Development Zone, Shuangliu County Southwest Airlines, Chengdu, Sichuan Patentee before: CHENGDU HAN DE SHENG BANG OPTICAL Co.,Ltd. |