CN115236837A - Visual optical imaging system and imaging method thereof - Google Patents
Visual optical imaging system and imaging method thereof Download PDFInfo
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- CN115236837A CN115236837A CN202210566510.XA CN202210566510A CN115236837A CN 115236837 A CN115236837 A CN 115236837A CN 202210566510 A CN202210566510 A CN 202210566510A CN 115236837 A CN115236837 A CN 115236837A
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- 230000000007 visual effect Effects 0.000 title claims abstract description 21
- 238000012634 optical imaging Methods 0.000 title claims abstract description 15
- 238000003384 imaging method Methods 0.000 title claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 239000011521 glass Substances 0.000 claims abstract description 4
- 230000005499 meniscus Effects 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical 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
-
- 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
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides a visual optical imaging system and an imaging method thereof, wherein the visual optical imaging system comprises a diaphragm, protective glass, a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along a light incident light path from left to right; the first lens is a double convex positive lens, and the second lens, the third lens and the fifth lens are meniscus negative lenses. The invention can realize the large-range adjustment of +/-5 visual degrees and can better adapt to more user groups; the optical lens has reasonable surface design, excellent imaging quality, peripheral illumination ratio of more than 93 percent and good imaging picture brightness and uniformity; the lens can be adapted to a large-size screen with the diameter of 13mm or more, and the resolution of the lens is high; by adopting a glass-plastic mixed structure and matching with a base, the zero focus drift within a temperature range of-40 to 120 ℃ can be realized, and the imaging stability is greatly improved compared with the common all-plastic cement structural system in the market at present.
Description
Technical Field
The invention relates to a visual optical imaging system and an imaging method thereof.
Background
Visual lenses are one of the leading edges of the current optical design field, and virtual reality and augmented reality technologies are more popular. The VR/AR equipment can bring people with immersive experience, is increasingly applied to the fields of education, military, medicine and the like, and the future development space is not limited. However, most products on the market are limited by hardware, and the resolution and positioning accuracy are difficult to meet the actual requirements of some users, so that the VR/AR technology is again in the development bottleneck after a short heat surge.
Disclosure of Invention
The present invention is an improvement of the above-mentioned problems, and it is an object of the present invention to provide a visual optical imaging system and an imaging method thereof, which are simple in structure and convenient to use.
The invention is formed in this way, it includes the diaphragm, the protective glass, the first lens, the second lens, the third lens, the fourth lens, the fifth lens that set up from left to right sequentially along the incident light path of the light; the first lens is a double convex positive lens, and the second lens, the third lens and the fifth lens are meniscus negative lenses.
Further, the focal length of the optical system is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are f 1 、f 2 、f 3 、f 4 、f 5 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 And f satisfy the following ratio: f is more than 0.9 1 /f＜1.5，-4.0＜f 2 /f＜-2.0，-3.5＜f 3 /f＜-0.5，0.1＜f 4 /f＜1.1，-51.0＜f 5 /f＜-39.1。
Further, the first lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the describedThe second lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the third lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the fourth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the fifth lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Not less than 50.0; wherein N is d Is refractive index, V d Abbe constant.
Further, the second lens, the third lens, the fourth lens and the fifth lens are aspheric lenses, and the aspheric curve equation expression is as follows:
(ii) a Wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; a is 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 、a 8 Are all high-order term coefficients.
Further, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 1.69.
Further, the optical system has a visual magnification >11.0.
Furthermore, the size of the screen which can be adapted to the optical system and the focal length f of the optical system meet the following requirements: imaH/f is more than or equal to 0.56.
Furthermore, the light rays sequentially pass through the first lens, the second lens, the third lens, the fourth lens and the fifth lens to be imaged.
Compared with the prior art, the invention has the following beneficial effects: the device has simple structure and reasonable design, can realize the large-range adjustment of +/-5 visual degrees, and can better adapt to more user groups; the optical lens has reasonable surface design, excellent imaging quality, peripheral illumination ratio of more than 93 percent and good imaging picture brightness and uniformity; the lens can be adapted to a large-size screen with the diameter of 13mm or more, and the resolution of the lens is high; by adopting a glass-plastic mixed structure and matching with a base, the zero focus drift within a temperature range of-40 to 120 ℃ can be realized, and the imaging stability is greatly improved compared with the common all-plastic cement structural system in the market at present.
Drawings
FIG. 1 is a schematic diagram of an optical structure according to a first embodiment of the present invention;
FIG. 2 is a diagram of the axial aberration of the working wavelength band according to the first embodiment of the present invention;
FIG. 3 is a graph of MTF for the operating band according to the first embodiment of the present invention;
FIG. 4 is a field curvature distortion diagram of the working band according to the first embodiment of the present invention;
FIG. 5 is a schematic view of an optical structure according to a second embodiment of the present invention;
FIG. 6 is an axial aberration diagram of the working wavelength band of the second embodiment of the present invention;
FIG. 7 is a graph of MTF for the operating band of a second embodiment of the present invention;
fig. 8 is a field curvature distortion diagram of the operating band in accordance with the second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 8, the present invention provides a visual optical imaging system, which includes a stop STO, a protective glass CG, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5, which are sequentially arranged along a light incident path from left to right; the first lens is a double convex positive lens, and the second lens, the third lens and the fifth lens are meniscus negative lenses.
The focal length of the optical system is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively f 1 、f 2 、f 3 、f 4 、f 5 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 And f satisfy the following ratio: f is more than 0.9 1 /f＜1.5，-4.0＜f 2 /f＜-2.0，-3.5＜f 3 /f＜-0.5，0.1＜f 4 /f＜1.1，-51.0＜f 5 /f＜-39.1。
The first lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the second lensThe mirror satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Less than or equal to 50.0; the third lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the fourth lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Not less than 50.0; the fifth lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Not less than 50.0; wherein N is d Is refractive index, V d Abbe constant.
The second lens, the third lens, the fourth lens and the fifth lens are aspheric lenses, and the aspheric curve equation expression is as follows:
(ii) a Wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; a is 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 、a 8 Are all high-order term coefficients.
The total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 1.69.
The visual magnification of the optical system described above is >11.0.
The size of the screen which can be adapted to the optical system and the focal length f of the optical system meet the following requirements: imaH/f is more than or equal to 0.56.
During imaging, light rays sequentially pass through the first lens, the second lens, the third lens, the fourth lens and the fifth lens and then are imaged.
Example 1: technical indexes realized by the optical system of the embodiment are as follows:
(1) Focal length: EFFL is more than or equal to 19.6mm and less than or equal to 26.4mm; (2) working wave band: visible light (3) working distance: 18mm.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is shown in table 1 below:
TABLE 1
The aspherical coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
TABLE 2
Example 2: the technical indexes of the optical system of the embodiment are as follows:
(1) Focal length: EFFL is more than or equal to 19.6mm and less than or equal to 26.4mm; (2) working wave band: visible light (3) working distance: 16.3mm.
To realize the above design parameters, the optical system of this embodiment adopts the following specific design as shown in table 3:
TABLE 3
The aspherical surface coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
TABLE 4
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effects which can be achieved. Since the number is large and cannot be exhaustive, some of the numbers are disclosed to exemplify the technical solutions of the present invention, and the above-mentioned numbers should not be construed as limiting the scope of the present invention.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using a bolt or screw connection) can also be understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (8)
1. A visual optical imaging system is characterized by comprising a diaphragm, protective glass, a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along a light incident light path from left to right; the first lens is a biconvex positive lens, and the second lens, the third lens and the fifth lens are meniscus negative lenses.
2. A visual optical imaging system according to claim 1, wherein the focal length of the optical system is set to f, firstThe focal lengths of the lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively f 1 、f 2 、f 3 、f 4 、f 5 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 And f satisfy the following ratio: f is more than 0.9 1 /f＜1.5，-4.0＜f 2 /f＜-2.0，-3.5＜f 3 /f＜-0.5，0.1＜f 4 /f＜1.1，-51.0＜f 5 /f＜-39.1。
3. A visual optical imaging system according to claim 1, wherein said first lens satisfies the relationship: n is a radical of d ≥1.5，V d Not less than 50.0; the second lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the third lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Less than or equal to 50.0; the fourth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the fifth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; wherein N is d Is refractive index, V d Abbe constant.
4. The visual optical imaging system of claim 1, wherein the second, third, fourth and fifth lenses are aspheric lenses, and the aspheric curve equation expression is:
(ii) a Wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; a is a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 、a 8 Are all high-order term coefficients.
5. The visual optical imaging system of claim 1, wherein the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 1.69.
6. A visual optical imaging system according to claim 1, wherein the optical system has a visual magnification >11.0.
7. A visual optical imaging system according to claim 1, wherein the optical system is adapted to fit a screen size and the optical system has a focal length f that satisfies: imaH/f is more than or equal to 0.56.
8. An imaging method using a visual optical imaging system according to any one of claims 1 to 7, wherein light is imaged after passing through the first lens, the second lens, the third lens, the fourth lens and the fifth lens in this order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210566510.XA CN115236837B (en) | 2022-05-24 | 2022-05-24 | Visual optical imaging system and imaging method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210566510.XA CN115236837B (en) | 2022-05-24 | 2022-05-24 | Visual optical imaging system and imaging method thereof |
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| CN115236837A true CN115236837A (en) | 2022-10-25 |
| CN115236837B CN115236837B (en) | 2024-01-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000121963A (en) * | 1999-11-22 | 2000-04-28 | Asahi Optical Co Ltd | Variable power finder |
| CN106405818A (en) * | 2016-07-21 | 2017-02-15 | 苏州莱能士光电科技股份有限公司 | Visual optical system and head-mounted display device |
| WO2018010245A1 (en) * | 2016-07-14 | 2018-01-18 | 浙江舜宇光学有限公司 | Eyepiece |
| CN110426838A (en) * | 2019-07-29 | 2019-11-08 | 深圳纳德光学有限公司 | A kind of eyepiece optical system and head-mounted display |
| WO2021016810A1 (en) * | 2019-07-29 | 2021-02-04 | 深圳纳德光学有限公司 | Eyepiece optical system and head-mounted display |
-
2022
- 2022-05-24 CN CN202210566510.XA patent/CN115236837B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000121963A (en) * | 1999-11-22 | 2000-04-28 | Asahi Optical Co Ltd | Variable power finder |
| WO2018010245A1 (en) * | 2016-07-14 | 2018-01-18 | 浙江舜宇光学有限公司 | Eyepiece |
| CN106405818A (en) * | 2016-07-21 | 2017-02-15 | 苏州莱能士光电科技股份有限公司 | Visual optical system and head-mounted display device |
| CN110426838A (en) * | 2019-07-29 | 2019-11-08 | 深圳纳德光学有限公司 | A kind of eyepiece optical system and head-mounted display |
| WO2021016810A1 (en) * | 2019-07-29 | 2021-02-04 | 深圳纳德光学有限公司 | Eyepiece optical system and head-mounted display |
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