CN106019596A - Optical system used for virtual reality display equipment - Google Patents
Optical system used for virtual reality display equipment Download PDFInfo
- Publication number
- CN106019596A CN106019596A CN201610602655.5A CN201610602655A CN106019596A CN 106019596 A CN106019596 A CN 106019596A CN 201610602655 A CN201610602655 A CN 201610602655A CN 106019596 A CN106019596 A CN 106019596A
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- China
- Prior art keywords
- fresnel lenses
- optical system
- virtual reality
- lens
- mould
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- 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.)
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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
Abstract
The invention provides an optical system used for virtual reality display equipment. The optical system comprises a positive lens and a negative lens. The positive lens is arranged at one side close to the position of human eyes. The negative lens is arranged at one side close to a display screen. The side, which is close to the eyes, of the positive lens is provided with a diffractive optical element. The side, which is close to the display screen, of the positive lens is provided with a Fresnel lens. The manufacturing method of the Fresnel lens comprises the steps that step 1: a Fresnel lens mould is customized according to the required tooth width or pitch of the Fresnel lens; step 2: the Fresnel lens mould obtained in the step 1 is arranged in an injection molding machine, and the mould is preheated; step 3: when temperature of the mould reaches 90-140 DEG C, the injection molding system of the injection molding machine is controlled to inject fused PC or PMMA into the Fresnel lens mould; and step 4: the mould of the step 3 is cooled and the finished product is obtained through demoulding. According to the optical system used for the virtual reality display equipment, the achromatic and distortion correcting large-visual-field high-quality optical effect can be obtained, and the aperture of the whole optical system is large and the length is small.
Description
Technical field
The present invention relates to technical field of optical, particularly relate to a kind of light for virtual reality display device
System.
Background technology
Along with virtual reality technology is military simulation, industrial simulation, digital city, digital entertainment and electronics business
The extensive application in the various fields such as business, the most various virtual reality products emerge in an endless stream.Wherein apply
Main still plus lens and the combination of minus lens of optical system in virtual implementing helmet display device, its face type
Predominantly sphere, aspheric surface or free form surface.When using this kind of optical system, in order to bring to user
Feeling of immersion, need shorten system focal to increase visual field, shortening focal length dispersion and distortion can be made to increase the weight of,
The image quality of whole system is bad.For solving this problem, those skilled in the art is by increasing convex lens
Quantity or the quantity of minus lens improve the quality of imaging, and increase lens number and can cause whole system
Length increases, and uses inconvenience, and if shorten the distance between lens, thus reach to shorten system length
Purpose, then system bore does not quite, and visual field is difficult to scale up, the feeling of immersion still cannot brought to user.
Summary of the invention
It is an object of the invention to provide a kind of optical system for virtual reality display device, solve existing void
Intend reality display device optical system exist use conventional lenses can not obtain simultaneously high imaging quality with relatively
Short system length and the technical problem of the big visual field of heavy caliber.
In order to achieve the above object, the present invention provides following technical scheme: a kind of display for virtual reality sets
Standby optical system, including plus lens and minus lens, the near-eye side of described plus lens arranges diffraction optical element,
Described minus lens is diverging meniscus lens, and the concave surface of described diverging meniscus lens is positioned at nearly display screen side.
In a preferred embodiment, the nearly display screen side of described plus lens arranges Fresnel Lenses, institute
Stating the substrate of Fresnel Lenses is plane or sphere or aspheric surface or free form surface.
In a preferred embodiment, the substrate of described diffraction optical element is plane or sphere or aspheric
Face or free form surface.
In a preferred embodiment, the surface relief structure of described diffraction optical element is continuous relief
Structure or multistage embossment structure or Fresnel type structure.
In a preferred embodiment, described minus lens between plus lens and display screen, described just
Lens are located close to human eye side.
In a preferred embodiment, the surface of described diverging meniscus lens is sphere or aspheric surface or freedom
Curved surface or diffractive optical surfaces.
In a preferred embodiment, described Fresnel Lenses is to wait tooth pitch Fresnel Lenses, described tooth
Away from for 0.2mm-1mm.
In a preferred embodiment, described Fresnel Lenses such as is at the facewidth Fresnel Lenses, described tooth
A width of 0.2mm-1mm.
In a preferred embodiment, the manufacture method of described Fresnel Lenses comprises the following steps:
Step 1: the Fresnel Lenses facewidth as required or tooth pitch, customizes Fresnel Lenses mould；
Step 2: step 1 gained Fresnel Lenses mould is loaded injection machine, mould is preheated, preheating
Time is 10s-20s, and preheating temperature is not less than 80 DEG C；
Step 3: when mold temperature reaches 90 DEG C-140 DEG C, controls the injecting systems PC by fusing of injection machine
Or PMMA injects in Fresnel Lenses mould；
Step 4: the mould of step 3 is cooled down, chilling temperature is 10 DEG C-40 DEG C, cool time 50s-130s,
The demoulding obtains finished product.
In a preferred embodiment, described Fresnel Lenses mould includes groove type substrate and template,
The inner bottom surface of described groove type substrate arranges equally spaced groove, and described template-setup is in described groove type substrate
Upper surface, makes to be formed between described template and described groove type substrate cavity.
A kind of optical system for virtual reality display device of the present invention, compared with prior art, it is useful
Effect is:
First, the near-eye side of plus lens arranges diffraction optical element, utilizes the dispersion that diffraction optical element is special
Characteristic, spreads out hybrid lens with conventional lenses composition folding, is possible not only to reduce the curvature of refractive element and permissible
Effectively color difference eliminating, distortion etc., improves image quality.The nearly display screen side of plus lens arranges Fresnel Lenses,
Slimming can be realized, mainly play lensing by the refraction of geometric optics, at thickness direction or half
The equally spaced division in direction, footpath.Use Fresnel Lenses can increase bore and not increase convex lens center thickness,
Can shorten focal length further and increase visual field, the focal range of the present invention can reach 25mm-80mm, visual field
Scope can reach 70 °-125 °, simultaneously, it is possible to reduce weight, shortens the length of whole system.Diverging meniscus lens
Being arranged between plus lens and display screen, it can reduce distortion further so that within distortion drops to 5%.
The optical system that the present invention provides can obtain the high quality optical effect of the big visual field of achromatism and the distortion that disappears,
Whole optical system bore is big and length is short, and lens numbers used is few, volume is little, lightweight, cost
Low.
Secondly, the Fresnel Lenses in the present invention can be tooth pitch Fresnel Lenses such as grade, it is also possible to for etc. the facewidth
Fresnel Lenses.Deng tooth pitch or etc. the Fresnel Lenses of the facewidth can reach the light belt specifying spectral region
The effect of logical (reflect or reflect), thus strengthen optically focused.It is demonstrated experimentally that tooth pitch or the facewidth in the range of
During 0.2mm-1mm, spotlight effect is best.
Finally, the present invention gives the manufacture method of used Fresnel Lenses, prepared by the method
Fresnel Lenses, spotlight effect is good, strong shock resistance, is applied to virtual reality display device
In optical system, good effect can be reached.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only embodiments of the invention, for those of ordinary skill in the art, do not paying wound
On the premise of the property made work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the light path schematic diagram of a kind of optical system for virtual reality display device of the present invention；
Fig. 2 is the distortion curve schematic diagram of a kind of optical system for virtual reality display device of the present invention.
In figure, 1. plus lens, 2. position of human eye, 3. display screen, 4. minus lens.
Detailed description of the invention
Below in conjunction with the accompanying drawing of the present invention, technical scheme is clearly and completely described.
Based on the embodiment in the present invention, those of ordinary skill in the art are institute under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
According to Fig. 1, in one embodiment of the invention, disclose one to show for virtual reality
Showing the structure of the optical system of equipment, including plus lens 1 and minus lens 4, plus lens 1 is located close to human eye position
Putting the side of 2, minus lens 4 is located close to the side of display screen 3.Wherein, the near-eye side of plus lens 1 sets
Putting diffraction optical element, the nearly display screen side of plus lens arranges Fresnel Lenses, wherein diffraction optical element bag
Including the substrate of plane or sphere or aspheric surface or free form surface, the surface relief structure of diffraction optical element is for even
Continue embossment structure or multistage embossment structure or Fresnel type structure.Wherein, the substrate of Fresnel Lenses is plane
Or sphere or aspheric surface or free form surface.Minus lens 2 is diverging meniscus lens, and the concave surface of diverging meniscus lens is positioned at
Near the side of display screen 3, convex surface is located close to plus lens 1 side, and the surface of diverging meniscus lens is sphere
Or aspheric surface or free form surface or diffractive optical surfaces.Diffraction optical element uses photoetching process to process and be molded
Molding.Fresnel Lenses for wait tooth pitch or etc. facewidth Fresnel Lenses, tooth pitch, facewidth scope are
0.2mm-1mm.Deng tooth pitch or etc. the light belt that can reach specifying spectral region of the Fresnel Lenses of the facewidth lead to
The effect of (reflect or reflect), thus strengthen optically focused.Fresnel Lenses is 1:1.2 with the area ratio of plus lens,
This ratio can reach effective spotlight effect on the basis of saving Fresnel Lenses, reduces reflection pleasing to the eye
The light at the end, reduces the stimulation for optical fundus, it is to avoid the dry and astringent situation of eye occurs.And carried out by this ratio
Assembling, overall ratio is more reasonable, in conjunction with more consolidation, makes this optical system have good impact resistance effect
Really.Higher additionally, due to Fresnel Lenses price, the setting of this ratio, it will reduce cost.
In one embodiment of the invention, the manufacture method of Fresnel Lenses comprises the following steps:
Step 1: the Fresnel Lenses facewidth as required or tooth pitch, customizes Fresnel Lenses mould；
Step 2: step 1 gained Fresnel Lenses mould is loaded injection machine, mould is preheated, preheating
Time is 10s, and preheating temperature is 110 DEG C；
Step 3: when mold temperature reaches 90 DEG C, control injection machine injecting systems by fusing PC or
PMMA injects in Fresnel Lenses mould；
Step 4: the mould of step 3 is cooled down, chilling temperature is 10 DEG C, cool time 60s, the demoulding
Obtain finished product.
Wherein, Fresnel Lenses mould includes groove type substrate and template, and the inner bottom surface of groove type substrate is arranged
Equally spaced groove, template-setup, in groove type upper surface of substrate, makes to be formed between template and groove type substrate
Cavity.
In one embodiment of the invention, the manufacture method of Fresnel Lenses comprises the following steps:
Step 1: the Fresnel Lenses facewidth as required or tooth pitch, customizes Fresnel Lenses mould；
Step 2: step 1 gained Fresnel Lenses mould is loaded injection machine, mould is preheated, preheating
Time is 20s, and preheating temperature is 80 DEG C；
Step 3: when mold temperature reaches 140 DEG C, control injection machine injecting systems by fusing PC or
PMMA injects in Fresnel Lenses mould；
Step 4: cool down the mould of step 3, chilling temperature is 20 DEG C, and cool time is 110s, de-
Mould obtains finished product.
Wherein, Fresnel Lenses mould includes groove type substrate and template, and the inner bottom surface of groove type substrate is arranged
Equally spaced groove, template-setup, in groove type upper surface of substrate, makes to be formed between template and groove type substrate
Cavity.
In one embodiment of the invention, the manufacture method of Fresnel Lenses comprises the following steps:
Step 1: the Fresnel Lenses facewidth as required or tooth pitch, customizes Fresnel Lenses mould；
Step 2: step 1 gained Fresnel Lenses mould is loaded injection machine, mould is preheated, preheating
Time is 15s, and preheating temperature is 100 DEG C；
Step 3: when mold temperature reaches 110 DEG C, control injection machine injecting systems by fusing PC or
PMMA injects in Fresnel Lenses mould；
Step 4: the mould of step 3 is cooled down, chilling temperature is 40 DEG C, cool time 130s, the demoulding
Obtain finished product.
Wherein, Fresnel Lenses mould includes groove type substrate and template, and the inner bottom surface of groove type substrate is arranged
Equally spaced groove, template-setup, in groove type upper surface of substrate, makes to be formed between template and groove type substrate
Cavity.
During use, the image on display screen 3 is through minus lens 4 and plus lens 1 imaging, and eye-observation is to amplifying
The virtual image.Owing to the near-eye side of plus lens 1 arranges diffraction optical element, due to diffraction optical element and tradition
Refractor has contrary dispersion rule, therefore, is diffraction optics unit by plus lens surface configuration
Part, be possible not only to reduce the curvature of refractive element and also can effectively color difference eliminating, distortion etc. so that imaging
Quality improves a lot.The distortion curve of the present invention is as in figure 2 it is shown, it can be seen that distort permissible
Within dropping to 5%.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited to
This, any those familiar with the art, in the technical scope that the invention discloses, can readily occur in
Change or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should
Described it is as the criterion with scope of the claims.
Claims (10)
1. for an optical system for virtual reality display device, including plus lens and minus lens, its feature
Being: the near-eye side of described plus lens arranges diffraction optical element, described minus lens is diverging meniscus lens, institute
The concave surface stating diverging meniscus lens is positioned at nearly display screen side.
A kind of optical system for virtual reality display device the most according to claim 1, its feature
Being: the nearly display screen side of described plus lens arranges Fresnel Lenses, the substrate of described Fresnel Lenses is flat
Face or sphere or aspheric surface or free form surface.
A kind of optical system for virtual reality display device the most according to claim 1 and 2, its
It is characterised by: the substrate of described diffraction optical element is plane or sphere or aspheric surface or free form surface.
A kind of optical system for virtual reality display device the most according to claim 1 and 2, its
It is characterised by: the surface relief structure of described diffraction optical element is continuous relief structure or multistage embossment structure
Or Fresnel type structure.
A kind of optical system for virtual reality display device the most according to claim 1, its feature
It is: described minus lens is between plus lens and display screen, and described plus lens is located close to human eye side.
A kind of optical system for virtual reality display device, its
It is characterised by: the surface of described minus lens is sphere or aspheric surface or free form surface or diffractive optical surfaces.
A kind of optical system for virtual reality display device the most according to claim 2, its feature
It is: described Fresnel Lenses is to wait tooth pitch Fresnel Lenses, and described tooth pitch is 0.2mm-1mm.
A kind of optical system for virtual reality display device the most according to claim 2, its feature
It is: described Fresnel Lenses such as is at the facewidth Fresnel Lenses, and the described facewidth is 0.2mm-1mm.
9. according to a kind of optical system for virtual reality display device described in claim 7 or 8, its
It is characterised by: the manufacture method of described Fresnel Lenses comprises the following steps:
Step 1: the Fresnel Lenses facewidth as required or tooth pitch, customizes Fresnel Lenses mould；
Step 2: step 1 gained Fresnel Lenses mould is loaded injection machine, mould is preheated, preheating
Time is 10s-20s, and preheating temperature is not less than 80 DEG C；
Step 3: when mold temperature reaches 90 DEG C-140 DEG C, controls the injecting systems PC by fusing of injection machine
Or PMMA injects in Fresnel Lenses mould；
Step 4: the mould of step 3 is cooled down, chilling temperature is 10 DEG C-40 DEG C, cool time 50s-130s,
The demoulding obtains finished product.
A kind of optical system for virtual reality display device the most according to claim 9, it is special
Levy and be: described Fresnel Lenses mould includes groove type substrate and template, the inner bottom of described groove type substrate
Face arranges equally spaced groove, described template-setup in described groove type upper surface of substrate, make described template with
Cavity is formed between described groove type substrate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620615738 | 2016-06-21 | ||
| CN2016206157383 | 2016-06-21 |
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| Publication Number | Publication Date |
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| CN106019596A true CN106019596A (en) | 2016-10-12 |
| CN106019596B CN106019596B (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (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 |
| CN106772717A (en) * | 2016-12-22 | 2017-05-31 | 深圳超多维科技有限公司 | A kind of Fresnel Lenses and virtual reality device |
| WO2019080325A1 (en) * | 2017-10-24 | 2019-05-02 | 歌尔科技有限公司 | Eyepiece and head mounted display device |
| WO2020062847A1 (en) * | 2018-09-26 | 2020-04-02 | 深圳珑璟光电技术有限公司 | Illumination device |
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Cited By (7)
| 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 |
| CN106772717A (en) * | 2016-12-22 | 2017-05-31 | 深圳超多维科技有限公司 | A kind of Fresnel Lenses and virtual reality device |
| CN106772717B (en) * | 2016-12-22 | 2019-03-26 | 深圳超多维科技有限公司 | A kind of Fresnel Lenses and virtual reality device |
| WO2019080325A1 (en) * | 2017-10-24 | 2019-05-02 | 歌尔科技有限公司 | Eyepiece and head mounted display device |
| JP2020500318A (en) * | 2017-10-24 | 2020-01-09 | 歌爾科技有限公司ＧｏｅｒＴｅｋ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｔｄ． | Eyepiece and head mounted display |
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| WO2020062847A1 (en) * | 2018-09-26 | 2020-04-02 | 深圳珑璟光电技术有限公司 | Illumination device |
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| CN106019596B (en) | 2019-01-04 |
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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. |
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