CN112305747B - Observation VR system microdisplay eyepiece - Google Patents
Observation VR system microdisplay eyepiece Download PDFInfo
- Publication number
- CN112305747B CN112305747B CN201910671680.2A CN201910671680A CN112305747B CN 112305747 B CN112305747 B CN 112305747B CN 201910671680 A CN201910671680 A CN 201910671680A CN 112305747 B CN112305747 B CN 112305747B
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- lens
- eyepiece
- cemented
- micro display
- microdisplay
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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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
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides an eyepiece for observing a VR system microdisplay, which is characterized in that: the first eyepiece lens, the second eyepiece lens and the third eyepiece cemented lens are designed from the micro display interface to the pupil in sequence, the first eyepiece lens is a meniscus lens with a concave surface facing the micro display interface, the second eyepiece lens is a biconvex lens, the cemented eyepiece cemented lens is formed by cementing two lenses made of different materials, the chromatic aberration of the objective lens is corrected, the third eyepiece cemented lens is a biconvex lens, four three-group eyepiece structures which are optimally combined are utilized, and 60-degree view field is realized, 18mm pupil distance is increased, and the distortion is lower than 1%.
Description
Technical Field
The invention relates to the technical field of optical production, in particular to an eyepiece of a micro-display for observing a VR system.
Background
The Virtual Reality technology (VR) is a visual Virtual environment which is generated by a computer, can be interacted, and has immersion feeling, and is proposed in the 80 th 20 th century, and can generate various Virtual environments as required, and the VR technology is widely applied to the fields of city planning, driving training, indoor design and the like. In recent years, with the development of computer computing capability and various types of sensors, various types of virtual reality helmets have appeared on the market, and the virtual reality helmets basically consist of a display screen or a mobile phone and a pair of eyepieces, wherein, human eyes can see enlarged images on the screen through the eyepieces, and the sensors sense the change of human heads to adjust the images in the left screen and the right screen, so that the human eyes can see three-dimensional visual images with interactivity.
The eyepiece applied to the virtual reality helmet in the market at present is generally a convex lens made of plastic, the shorter the focal length is, the larger the visual range is, the more compact the equipment is, the better the immersion feeling brought to the user is, but the great difficulty of aberration correction is brought about, the edge image blur and chromatic aberration aggravate, the image deformation is serious, and the like, so that the focal length cannot be reduced at once.
In order to solve the problem of distortion and dispersion caused by a single lens, a general processing method is to perform software preprocessing on an undistorted image and input the image into left and right screens to compensate the aberration caused by the lens, but the method cannot solve the problem of edge image blurring, and can cause the reduction of a frame rate and the increase of distortion to cause dizziness for a user.
Disclosure of Invention
The invention aims to provide an eyepiece for observing a VR system microdisplay, which realizes a 60-degree view field, an 18mm exit pupil distance and distortion lower than 1% by using an optimally combined three-piece eyepiece structure.
In order to achieve the purpose, the invention adopts the technical scheme that:
an observation VR system microdisplay eyepiece, comprising: the first eyepiece lens, the second eyepiece lens and the third eyepiece cemented lens are designed from the micro display interface to the pupil in sequence, the first eyepiece lens is a double-aspheric lens with a concave surface facing the micro display interface, the left side section of the first eyepiece lens is of a wave-shaped structure, the second eyepiece lens is a biconvex lens, and the third eyepiece cemented lens is formed by cementing two lenses made of different materials so as to correct the chromatic aberration of the objective lens and is a biconvex lens.
As a further improvement of the invention, the focal length of the eyepiece of the micro-display is 16.2mm, the F number is 3.2, the visual field is +/-30 degrees, the diameter of the exit pupil is 5mm, the distance of the exit pupil is 18mm, the distortion is less than or equal to 1.0 percent, the relative illumination is 50.9 percent, the MTF graph is more than 30 percent on a 20lp/mm axis, and the off-axis is more than 10 percent.
The beneficial effects of the invention are concentrated and expressed as follows:
1. by the design of four pieces of three groups of optical lenses, the distortion is less than or equal to 1.0% on the premise of meeting the requirements of the exit pupil diameter of 5mm and the exit pupil distance of 18mm, and the visual experience effect is improved;
2. the eyepiece cemented lens mainly realizes correction of chromatic aberration by adopting two lenses for cementing;
3. the section of the first lens of the eyepiece is a double-aspheric surface with a wave-shaped structure, wherein the left aspheric surface has an inflection point and is highly aspheric, so that the minimization of distortion is realized, the design can collect light rays close to the edge of the first lens of the eyepiece, the effect of reducing aberration by a large field angle is achieved, and the problem of reducing edge image blur is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram of field distortion according to the present invention.
Detailed Description
The invention is further elucidated with reference to the drawing.
An observation VR system microdisplay eyepiece, comprising: from micro display interface to pupil design in proper order has eyepiece first lens 1, eyepiece second lens 2, eyepiece third cemented lens 3, eyepiece first lens 1 is the two aspheric surface lens of concave surface towards micro display interface, 1 left side cross-section of eyepiece first lens is the wave structure, eyepiece second lens 2 is biconvex type lens, eyepiece third cemented lens 3 is that two different material lenses veneer form, with the colour difference of rectifying objective, eyepiece third cemented lens 3 is biconvex type lens, 1 right side border position of eyepiece first lens is the horizontal plane, 1 left side border position of eyepiece first lens is the cambered surface crooked to the pupil, 2 right side border position of eyepiece second lens are the horizontal plane.
The following represents the ocular design results of the present invention:
lens specification:
| parameter(s) | Numerical value |
| Focal length | 16.2mm |
| Magnification factor | 15.4× |
| F number | 3.2 |
| Diagonal dimension of object plane | 0.7 inch (18.2 mm diameter with no allowance) |
| Field of view | ±30° |
| Wave band | Visible light |
| Diameter of exit pupil | Φ5mm |
| Distance of exit pupil | 18mm |
| Back intercept | 7.09mm |
| Total optical length (first lens to display) | 26.9mm |
| Lens total length (first lens to last lens) | 19.8mm |
| Maximum optical outer diameter of lens | Φ28mm |
| Distortion of | ≤1.0% |
| Relative illumination | 50.9% |
| Wave band | Visible light 486nm,587nm,610nm |
| MTF | Greater than 30% on the 20lp/mm axis and greater than 10% off-axis |
| Transmittance of light | Greater than 90 percent |
| Moderate regulation | -5D - 0D |
Claims (1)
1. An observation VR system microdisplay eyepiece, comprising: an eyepiece first lens, an eyepiece second lens and an eyepiece third cemented lens are designed from a micro display interface to a pupil in sequence, the eyepiece first lens is a double-aspheric lens with a concave surface facing the micro display interface, the left side section of the eyepiece first lens is of a wave-shaped structure, the left side of the eyepiece first lens is provided with an inflection point, the eyepiece second lens is of a biconvex type lens, the eyepiece third cemented lens is formed by cementing two lenses made of different materials, and the chromatic aberration of the correction objective lens is corrected, the eyepiece third cemented lens is of a biconvex type lens, the focal length of the micro display eyepiece is 16.2mm, the F number is 3.2, the viewing field is +/-30 degrees, the exit pupil diameter is 5mm, the exit pupil distance is 18mm, the distortion is less than or equal to 1.0 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910671680.2A CN112305747B (en) | 2019-07-24 | 2019-07-24 | Observation VR system microdisplay eyepiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910671680.2A CN112305747B (en) | 2019-07-24 | 2019-07-24 | Observation VR system microdisplay eyepiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112305747A CN112305747A (en) | 2021-02-02 |
| CN112305747B true CN112305747B (en) | 2021-08-13 |
Family
ID=74328784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910671680.2A Active CN112305747B (en) | 2019-07-24 | 2019-07-24 | Observation VR system microdisplay eyepiece |
Country Status (1)
| Country | Link |
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| CN (1) | CN112305747B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5835279A (en) * | 1994-03-01 | 1998-11-10 | Virtuality (Ip) Limited | Binocular vision system of a head mounted display unit |
| 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 |
| CN104635333A (en) * | 2015-01-26 | 2015-05-20 | 青岛歌尔声学科技有限公司 | Eyepiece, headset eyepiece system and micro-display headset equipment |
| CN205880362U (en) * | 2016-06-16 | 2017-01-11 | 贾怀昌 | Eyepiece optical system and use its little demonstration optical system |
| CN205982843U (en) * | 2016-09-05 | 2017-02-22 | 上海渺视光学科技有限公司 | Head mounted display and light path structure thereof |
-
2019
- 2019-07-24 CN CN201910671680.2A patent/CN112305747B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5835279A (en) * | 1994-03-01 | 1998-11-10 | Virtuality (Ip) Limited | Binocular vision system of a head mounted display unit |
| 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 |
| CN104635333A (en) * | 2015-01-26 | 2015-05-20 | 青岛歌尔声学科技有限公司 | Eyepiece, headset eyepiece system and micro-display headset equipment |
| CN205880362U (en) * | 2016-06-16 | 2017-01-11 | 贾怀昌 | Eyepiece optical system and use its little demonstration optical system |
| CN205982843U (en) * | 2016-09-05 | 2017-02-22 | 上海渺视光学科技有限公司 | Head mounted display and light path structure thereof |
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| Publication number | Publication date |
|---|---|
| CN112305747A (en) | 2021-02-02 |
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