CN111766700A - Short focus eyepiece assembly for head-mounted display device - Google Patents
Short focus eyepiece assembly for head-mounted display device Download PDFInfo
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- CN111766700A CN111766700A CN201910262345.7A CN201910262345A CN111766700A CN 111766700 A CN111766700 A CN 111766700A CN 201910262345 A CN201910262345 A CN 201910262345A CN 111766700 A CN111766700 A CN 111766700A
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- 238000003384 imaging method Methods 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 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
- G02B27/0101—Head-up displays characterised by optical features
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a short-focus eyepiece assembly applied to a head-mounted display device, wherein the short-focus eyepiece assembly is adjacently arranged on a display of the head-mounted display device, the short-focus eyepiece assembly receives an image source of the display and enables the short-focus eyepiece assembly to generate a focused image at the focus of the short-focus eyepiece assembly, the short-focus eyepiece assembly comprises at least two Fresnel lenses, the two Fresnel lenses are adjacently arranged side by side, surfaces with threads on the two Fresnel lenses are oppositely arranged, and a fixing piece is sleeved on the edges of the two Fresnel lenses to fix the two Fresnel lenses and prevent dust from entering between the two Fresnel lenses. According to the invention, through the arrangement of the two Fresnel lenses, the focal length of imaging can be effectively shortened, so that the purpose of reducing the volume of the eyepiece is achieved, and the application of a small-size virtual reality eyepiece is realized.
Description
Technical Field
The present invention relates to the art of optical assemblies, and more particularly to a short focal length eyepiece assembly for use in a head-mounted display device.
Background
Virtual Reality (VR) is a technology that generates a virtual image of a three-dimensional space by using computer technology and projects the image to the eyes of a user to make the user feel that the user is in his/her environment.
At present, the technology for realizing virtual reality mostly enables a user to wear a virtual reality device on the head, and simultaneously enables a display screen in the virtual reality device to be close to the eyes of the user, so that the user can see a display image amplified by several times in a short distance.
Referring to fig. 1, a typical conventional Head-mounted display 90 (HMD) is illustrated, in which the HMD 90 includes a housing 92, a display screen 94 and at least one lens 96 are enclosed in the housing 92, the display screen 94 and the lens 96 are disposed in the housing 92 side by side, so that an image of the display screen 94 can be projected on the lens 96, after the display screen 94 projects the image on the lens 96, the lens 96 can adjust a focus position of the image to project the image on an eye 98 of a user in a short distance, so that the user can view a wide-angle image through the HMD 90 to generate a virtual reality image.
However, the conventional virtual reality device has a relatively thick lens and a relatively long focal length, so that the volume and weight of the virtual reality device cannot be effectively reduced, and the virtual reality device is relatively heavy.
In view of the above, the present invention provides a short focal length eyepiece assembly for a head-mounted display device to overcome the above problems.
Disclosure of Invention
The invention mainly aims to provide a short-focus eyepiece component applied to a head-mounted display device, which can effectively shorten the focal length of imaging through the arrangement of two Fresnel lenses so as to reduce the volume of an eyepiece and realize the application of a small-size virtual reality eyepiece.
It is another object of the present invention to provide a short focal length eyepiece assembly for use in a head mounted display device that effectively reduces the focal length of the image while allowing the image to be more sharp.
To achieve the above object, the present invention provides a short-focus eyepiece assembly applied to a head-mounted display device, the short-focus eyepiece assembly is adjacently disposed on a display of the head-mounted display device, the short-focus eyepiece assembly can receive an image source of the display device, and the short-focus eyepiece assembly generates a focused image at a focal point thereof, the short-focus eyepiece assembly includes at least two Fresnel lenses (Fresnel lenses), the at least two Fresnel lenses are adjacently disposed side by side, a distance is further disposed between the at least two Fresnel lenses, the distance can be 0.5mm to 3mm, surfaces of the at least two Fresnel lenses having threads are oppositely disposed, and a fixing member is sleeved on edges of the at least two Fresnel lenses to fix the at least two Fresnel lenses and achieve a dustproof effect.
Wherein the short focal length eyepiece assembly is satisfied
Wherein F is the focal distance of the short focus eyepiece lens assembly, omega is the half viewing angle in the horizontal direction, and TTL is the distance between the short focus eyepiece lens assembly and the display.
Wherein the short focal length eyepiece assembly is satisfied
Where H is the height of the image corresponding to the field of view (FOV), ω is the half angle of view in the horizontal direction, and E is the distance from the aperture to the short focal length eyepiece assembly.
Wherein the short focal length eyepiece assembly is satisfied
Wherein f is1、f2The focal distances of the two fresnel lenses are respectively.
Wherein the short focal length eyepiece assembly is satisfied
Wherein F is the focal point of a short focal length eyepiece assemblyDistance, H, represents the height of the imaged image corresponding to the maximum field of view (FOV).
The purpose, technical content, features and effects of the present invention will be more readily understood by the following detailed description of specific embodiments.
Drawings
Fig. 1 is a schematic diagram of a conventional head-mounted display architecture.
Fig. 2 is a perspective view of the short focal length eyepiece lens assembly of the present invention.
Fig. 3 is a side sectional view of the short focal length eyepiece lens assembly architecture of the present invention.
Fig. 4 is a schematic diagram of the short focal length eyepiece lens assembly of the present invention mounted on a head mounted display device.
Fig. 5 is a schematic diagram of the short focal length eyepiece lens assembly of the present invention mounted in a head mounted display device for use.
Description of reference numerals: 1-short focal length eyepiece assembly; 10-a fresnel lens; 10' -a fresnel lens; 102-a thread; 102' -threads; 104-plane; 104' -plane; 12-a fixing member; 20-a head mounted display device; 22-a housing; 24-a display; 26-eye; a-spacing; b-a focal point; 90-head mounted display; 92-a housing; 94-a display screen; 96-lens; 98-eye.
Detailed Description
The invention provides a short-focus eyepiece assembly which can be arranged in a head-mounted display device to adjust an image of a display of the head-mounted display device, wherein the short-focus eyepiece assembly not only can clearly present the image, but also can effectively reduce the weight and the volume of the head-mounted display device and realize the application of a small-size virtual reality eyepiece because the short-focus eyepiece assembly is light, thin and short in focus.
Referring to fig. 2 and fig. 3, to illustrate the structure of the short-focus eyepiece assembly 1 of the present invention, the short-focus eyepiece assembly 1 of the present invention includes at least two Fresnel lenses 10, 10 'arranged side by side and adjacently, wherein the Fresnel lenses 10, 10' are Fresnel lenses (Fresnel lenses) made of optical plastic or glass. In the present embodiment, one surface of the fresnel lenses 10, 10 ' has threads 102, 102 ', and the other surface is a plane 104, 104 ', and the two fresnel lenses 10, 10 ' are disposed opposite to each other, and the two fresnel lenses 10, 10 ' are further fixed together by a fixing member 12 disposed at the edge of the two fresnel lenses 10, 10 ', and the fixing member 12 is a ring-shaped sleeve disposed at the edge of the two fresnel lenses 10, 10 ', so as to fix the two fresnel lenses 10, 10 ' together, and the fixing member 12 is disposed to prevent dust from entering between the two fresnel lenses 10, 10 '. Of course, the two fresnel lenses 10 and 10 ' are not limited to the surface with the threads 102 and 102 ' being disposed opposite to each other, and the flat surfaces 104 and 104 ' or the surface with the threads 102 and the flat surface 104 ' may be disposed opposite to each other according to the present invention, and the present invention is not limited to the above-mentioned embodiment in which the surfaces with the threads 102 and 102 ' are disposed opposite to each other. A distance a is further arranged between the two fresnel lenses 10 and 10' of the short-focus eyepiece lens assembly 1, the distance a can be 0.5-3 mm, the distance is quite short and does not occupy space, and the volume of the short-focus eyepiece lens assembly 1 can be effectively reduced. Furthermore, the two fresnel lenses 10 and 10' are arranged side by side, so that the focal length of the short-focus eyepiece lens assembly 1 is less than 25 millimeters (mm), and compared with the conventional lens with a focal length of 60 mm, the short-focus eyepiece lens assembly 1 of the present invention has a very short focal length, so that when the present invention is applied to a head-mounted display device, the purpose of effectively reducing the volume of the head-mounted display device can be achieved.
After the structure of the short-focus eyepiece lens assembly 1 of the present invention is described, referring to fig. 4, an embodiment of the short-focus eyepiece lens assembly 1 of the present invention mounted on a head-mounted display device 20 is described, as shown in the figure, the short-focus eyepiece lens assembly 1 of the present invention can be mounted in the head-mounted display device 20 to replace the existing lens in the head-mounted display device in the past, so as to shorten the volume and focus of the lens arrangement, and achieve the purpose of reducing the volume of the head-mounted display device 20. As shown in fig. 4, the head-mounted display device 20 includes a housing 22, and the housing 22 encloses the short-focus eyepiece assembly 1 and the display 24, wherein the short-focus eyepiece assembly 1 is disposed adjacent to the display 24 of the head-mounted display device 20, and the display 24 may be a display screen with a size of 1.5 inches to 2.5 inches.
Referring to fig. 5, to describe the usage status of the head-mounted display device 20 in detail, the short-focus eyepiece assembly 1 can receive the image source from the display 24, and then the short-focus eyepiece assembly 1 can generate a focused image at the focal point b thereof, so that the user's eyes 26 are positioned at the focal point, and the user can enjoy the focused image to experience virtual reality.
Furthermore, the structure of the short-focus eyepiece lens assembly 1 of the present invention can satisfy the following four conditions:
wherein F is the focal distance of the short focus eyepiece lens assembly, omega is the half viewing angle in the horizontal direction, and TTL is the distance between the short focus eyepiece lens assembly and the display.
Where H is the height of the image corresponding to the field of view (FOV), ω is the half angle of view in the horizontal direction, and E is the distance from the aperture to the short focal length eyepiece assembly.
Wherein f is1、f2The focal distances of the two fresnel lenses are respectively.
Where F is the focal distance of the short focal length eyepiece assembly and H is the imaging height corresponding to the field of view (FOV).
To prove that the short-focus eyepiece lens assembly 1 of the present invention can generate better images for users to view, please refer to the following four sets of experimental data to prove that the short-focus eyepiece lens assembly 1 of the present invention has good imaging effect. Under the conditions that the focal distance f of the short-focus eyepiece lens assembly 1 is 18.21, the aperture size FNO is 4.5, and the half angle of view 2 omega in the two-time horizontal direction is 88.7 degrees, the lens parameters (table one) and the aspheric coefficients (table two) are as follows:
TABLE I lens parameters
| Lens surface | K | A | B | C | D | E | F | G |
| 2 | infinity | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| 3 | -0.446658 | 0.000E+00 | -1.276E-07 | 4.002E-10 | -3.436E-13 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| 4 | infinity | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| 5 | -0.79189 | 0.000E+00 | 1.586E-07 | -4.018E-10 | 3.46E-13 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
TABLE II, aspheric coefficients
Under the conditions that the focal distance f of the short-focus eyepiece lens assembly 1 is 20.2, the aperture size FNO is 5, and the half angle of view 2 omega in the two-time horizontal direction is 89.3 degrees, the lens parameters (table three) and the aspheric coefficients (table four) are as follows:
TABLE III, lens parameters
| Lens surface | K | A | B | C | D | E | F | G |
| 2 | ∞ | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 3 | 1.69389625 | 0.000E+00 | -5.302E-07 | 2.163E-09 | -2.071E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 4 | ∞ | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 5 | -0.58627179 | 0.000E+00 | 6.868E-07 | -2.518E-09 | 2.94E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
TABLE IV, aspheric coefficients
Under the conditions that the focal distance f of the short-focus eyepiece lens assembly 1 is 20.1, the aperture size FNO is 4.9, and the half angle of view 2 omega in the two-time horizontal direction is 90.1 degrees, the lens parameters (table five) and the aspheric coefficients (table six) are as follows:
TABLE V lens parameters
| Lens surface | K | A | B | C | D | E | F | G |
| 2 | ∞ | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 3 | 1.1129 | 0.000E+00 | -5.328E-08 | 2.193E-09 | -1.257E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 4 | ∞ | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 5 | -0.41014 | 0.000E+00 | 6.926E-07 | -2.744E-09 | 3.43E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
TABLE VI, aspheric coefficients
Under the conditions that the focal distance f of the short-focus eyepiece lens assembly 1 is 22.59, the aperture size FNO is 5.4, and the half angle of view 2 omega in the two-time horizontal direction is 92.8 degrees, the lens parameters (table seven) and the aspheric coefficients (table eight) are as follows:
TABLE VII, lens parameters
| Lens surface | K | A | B | C | D | E | F | G |
| 2 | ∞ | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 3 | 1.8542 | 0.000E+00 | -5.708E-07 | 2.395E-07 | -2.109E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 4 | ∞ | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| 5 | -0.286717 | 0.000E+00 | 6.990E-07 | -2.760E-09 | 3.57E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
TABLE VIII, aspheric coefficients
In summary, the short-focus eyepiece assembly of the present invention can effectively shorten the focus of imaging by the arrangement of the two fresnel lenses, so as to achieve the purpose of reducing the volume of the eyepiece, and make imaging clearer, so as to implement the application of a small-size virtual reality eyepiece.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all the equivalent changes or modifications of the features and the spirit of the present invention described in the claims should be included in the scope of the present invention.
Claims (9)
1. A short focus eyepiece assembly for use with a head mounted display device, the short focus eyepiece assembly being disposed adjacent a display of the head mounted display device, the short focus eyepiece assembly receiving an image source of the display device and enabling the short focus eyepiece assembly to produce a focused image at a focal point of the short focus eyepiece assembly, the short focus eyepiece assembly comprising:
at least two Fresnel lenses, these at least two Fresnel lenses are adjacent and set up side by side.
2. The short focal length virtual reality device of claim 1, wherein the surfaces of the at least two fresnel lenses with threads are disposed opposite to each other.
3. The short focal length eyepiece lens assembly of claim 1, further comprising a fastening ring disposed around the edges of the at least two fresnel lenses for fastening the at least two fresnel lenses.
4. The short focal length eyepiece lens assembly as recited in claim 1 further comprising a spacing between said at least two fresnel lenses, said spacing being between 0.5mm and 3 mm.
5. The short focal length eyepiece assembly as recited in claim 1 applied to a head mounted display device wherein the focal length of the short focal length eyepiece assembly is less than 25 mm.
6. The short focus eyepiece assembly as recited in claim 1 applied to a head mounted display device wherein said short focus eyepiece assembly satisfies
F is the focal distance of the short focus eyepiece assembly, ω is the half viewing angle in the horizontal direction, TTL is the distance between the short focus eyepiece assembly and the display.
7. The short focus eyepiece assembly as recited in claim 1 applied to a head mounted display device wherein said short focus eyepiece assembly satisfies
H is the imaging height corresponding to the maximum field of view, ω is the half angle of view in the horizontal direction, and E is the distance from the aperture to the short focal length eyepiece lens assembly.
8. The short focus eyepiece assembly as recited in claim 1 applied to a head mounted display device wherein said short focus eyepiece assembly satisfies
F is1、f2The focal distances of the two fresnel lenses are respectively.
9. The short focus eyepiece assembly as recited in claim 1 applied to a head mounted display device wherein said short focus eyepiece assembly satisfies
The F is the focal distance of the short focal length eyepiece assembly and the H is the imaging height corresponding to the maximum field of view.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910262345.7A CN111766700A (en) | 2019-04-02 | 2019-04-02 | Short focus eyepiece assembly for head-mounted display device |
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| CN201910262345.7A CN111766700A (en) | 2019-04-02 | 2019-04-02 | Short focus eyepiece assembly for head-mounted display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236830A (en) * | 2021-11-30 | 2022-03-25 | 歌尔光学科技有限公司 | Optical system and head-mounted display equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843108A (en) * | 2007-08-31 | 2010-09-22 | 3Dis有限公司 | The real image display device with wide viewing angle |
| CN106405817A (en) * | 2016-06-02 | 2017-02-15 | 乐视控股（北京）有限公司 | Eyepiece lens and production method thereof, and corresponding device |
| JP2017211474A (en) * | 2016-05-25 | 2017-11-30 | キヤノン株式会社 | Observation optical system and observation device including the same |
| US20180081092A1 (en) * | 2016-09-16 | 2018-03-22 | Valve Corporation | Optical system for head-mounted display system |
| CN108700682A (en) * | 2016-05-18 | 2018-10-23 | 谷歌有限责任公司 | Use the optimization of the light field curvature of the Fresnel lens in VR displays |
| CN210136358U (en) * | 2019-04-02 | 2020-03-10 | 双莹科技股份有限公司 | Short focus eyepiece assembly for head-mounted display device |
-
2019
- 2019-04-02 CN CN201910262345.7A patent/CN111766700A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843108A (en) * | 2007-08-31 | 2010-09-22 | 3Dis有限公司 | The real image display device with wide viewing angle |
| CN108700682A (en) * | 2016-05-18 | 2018-10-23 | 谷歌有限责任公司 | Use the optimization of the light field curvature of the Fresnel lens in VR displays |
| JP2017211474A (en) * | 2016-05-25 | 2017-11-30 | キヤノン株式会社 | Observation optical system and observation device including the same |
| CN106405817A (en) * | 2016-06-02 | 2017-02-15 | 乐视控股（北京）有限公司 | Eyepiece lens and production method thereof, and corresponding device |
| US20180081092A1 (en) * | 2016-09-16 | 2018-03-22 | Valve Corporation | Optical system for head-mounted display system |
| CN210136358U (en) * | 2019-04-02 | 2020-03-10 | 双莹科技股份有限公司 | Short focus eyepiece assembly for head-mounted display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236830A (en) * | 2021-11-30 | 2022-03-25 | 歌尔光学科技有限公司 | Optical system and head-mounted display equipment |
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Effective date of registration: 20230424 Address after: Room 102, Building 1, No. 8 Shangsha Zhongnan Road, Chang'an Town, Dongguan City, Guangdong Province Applicant after: Dongguan Shuangying Optoelectronic Technology Co.,Ltd. Address before: taoyuan city Applicant before: SHUANGYING TECHNOLOGY Co.,Ltd. |