CN109407275B - Low-distortion light high-definition lens and imaging method thereof - Google Patents
Low-distortion light high-definition lens and imaging method thereof Download PDFInfo
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- CN109407275B CN109407275B CN201811442444.5A CN201811442444A CN109407275B CN 109407275 B CN109407275 B CN 109407275B CN 201811442444 A CN201811442444 A CN 201811442444A CN 109407275 B CN109407275 B CN 109407275B
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- lens
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- refractive index
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- 238000003384 imaging method Methods 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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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
-
- 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
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- 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
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/045—Lens hoods or shields
Abstract
The invention relates to a low-distortion light high-definition lens, wherein a positive moon lens A, a negative lens B, a negative lens C, a biconvex lens D, a negative lens E, a biconvex lens F, a biconvex lens G, a negative lens H and a biconvex lens I are sequentially arranged in an optical system of the lens along the incidence direction of light rays from left to right. The optical system is suitable for separating high performance, compact, light and wide temperature application range of the measuring sensor, has low cost and low power consumption, and can realize the function of clearly imaging a space target.
Description
Technical Field
The invention relates to a low-distortion light high-definition lens and an imaging method thereof.
Background
The space optical remote sensing technology in China is developed from aviation remote sensing to aerospace remote sensing taking artificial satellites, spacecraft and space planes as vehicles, and plays an important role in the fields of earth resource exploration, disaster prevention, military exploration and the like. The imaging mode of the remote sensing technology for acquiring data refers to a photographing and scanning mode. Wherein the optical component must meet certain conditions, is an indispensable important component.
At present, most short-focus lenses have the defects of larger weight, larger distortion, low field resolution and the like, and the design of the lenses is not only to consider reducing the carrying cost, but also to ensure the imaging effect.
Disclosure of Invention
The invention aims at overcoming the defects, and provides a low-distortion light high-definition lens with a simple structure and an imaging method thereof.
The technical scheme of the invention is that a low-distortion light high-definition lens is provided, wherein a positive moon-shaped lens A, a negative lens B, a negative lens C, a biconvex lens D, a negative lens E, a biconvex lens F, a biconvex lens G, a negative lens H and a biconvex lens I are sequentially arranged in an optical system of the lens along the incidence direction of light rays from left to right.
Further, the air space between the positive crescent lens A and the negative lens B is 0.08mm, the air space between the negative lens B and the negative lens C is 1.06mm, the air space between the negative lens C and the biconvex lens D is 0.51mm, the air space between the biconvex lens D and the negative lens E is 0.12mm, the air space between the negative lens E and the biconvex lens F is 0.12mm, the air space between the biconvex lens F and the biconvex lens G is 0.08mm, the air space between the biconvex lens G and the negative lens H is 0.08mm, and the air space between the negative lens H and the biconvex lens I is 0.21mm.
Further, the mechanical structure of the lens comprises a main lens barrel, wherein a positive moon tooth lens A, a negative lens B, a negative lens C, a double convex lens D, a negative lens E, a double convex lens F, a double convex lens G, a negative lens H and a double convex lens I are sequentially arranged in the main lens barrel along the incidence direction of light rays from left to right; the external thread at the front end of the main lens barrel is in threaded connection with a front protection lens cover, the external thread at the front end of the front protection lens cover is in threaded connection with a front protection sheet pressing ring, and a front protection sheet is arranged between the front protection sheet pressing ring and the front protection lens cover; the front end of the positive crescent lens A is provided with a front pressing ring; an AB space ring is arranged between the positive crescent lens A and the negative lens B, a DE space ring is arranged between the biconvex lens D and the negative lens E, an FG space ring is arranged between the biconvex lens F and the biconvex lens G, and a GH space ring is arranged between the biconvex lens G and the negative lens H; the rear mirror cover is arranged at the rear end of the main mirror cylinder, so that the whole protection of the lens can be realized.
An imaging method of a low-distortion light high-definition lens comprises the following steps: the light rays sequentially pass through the positive moon tooth lens A, the negative lens B, the negative lens C, the biconvex lens D, the negative lens E, the biconvex lens F, the biconvex lens G, the negative lens H and the biconvex lens I from left to right and then are imaged.
Compared with the prior art, the invention has the following beneficial effects: the imaging device has the advantages of low cost, low power consumption, high performance, compactness and wide temperature application range, and can realize imaging of space target resolution and low distortion rate.
Drawings
The patent of the invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an optical system according to an embodiment of the invention.
Fig. 2 is a diagram of distortion of the present invention.
FIG. 3 is a graph of the characteristic frequency of 20℃in the practice of the present invention.
FIG. 4 is a graph of characteristic frequencies at-50℃for the practice of the present invention.
FIG. 5 is a graph of characteristic frequencies at +90℃.
Fig. 6 is a general view of a mechanical assembly of an embodiment of the present invention.
In the figure: negative lens A, B, negative lens B, C, negative lens C, D, biconvex lens D, E, biconvex lens E, F, biconvex lens F, G, biconvex lens G, H, negative lens H, I, biconvex lens I.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1 to 6, in an optical system of the lens, a positive meniscus lens a, a negative lens B, a negative lens C, a biconvex lens D, a negative lens E, a biconvex lens F, a biconvex lens G, a negative lens H, and a biconvex lens I are sequentially arranged along the incidence direction of light rays from left to right.
In this embodiment, the air space between the positive crescent lens a and the negative lens B is 0.08mm, the air space between the negative lens B and the negative lens C is 1.06mm, the air space between the negative lens C and the lenticular lens D is 0.51mm, the air space between the lenticular lens D and the negative lens E is 0.12mm, the air space between the negative lens E and the lenticular lens F is 0.12mm, the air space between the lenticular lens F and the lenticular lens G is 0.08mm, the air space between the lenticular lens G and the negative lens H is 0.08mm, and the air space between the negative lens H and the lenticular lens I is 0.21mm.
In this embodiment, the mechanical structure of the lens includes a main barrel 1, in which a positive moon lens a, a negative lens B, a negative lens C, a biconvex lens D, a negative lens E, a biconvex lens F, a biconvex lens G, a negative lens H, and a biconvex lens I are sequentially disposed along the light incident direction from left to right; the external thread at the front end of the main lens cone is in threaded connection with a front protection lens cover 2, the external thread at the front end of the front protection lens cover is in threaded connection with a front protection sheet pressing ring 3, and a front protection sheet 4 is arranged between the front protection sheet pressing ring and the front protection lens cover; the front end of the positive crescent lens A is provided with a front pressing ring 5; an AB space ring 6 is arranged between the positive crescent lens A and the negative lens B, a DE space ring 7 is arranged between the biconvex lens D and the negative lens E, an FG space ring 8 is arranged between the biconvex lens F and the biconvex lens G, and a GH space ring 9 is arranged between the biconvex lens G and the negative lens H; the rear mirror cover 10 is arranged at the rear end of the main mirror barrel, so that the whole protection of the lens can be realized, the structure is compact and light, the total length is less than 17mm, and the total weight of the optical system is as follows: 7.1g; the optical structure has wide-angle characteristics, small volume and high resolution, and the resolution of-50 degrees to +90 degrees is ensured to be unchanged; the imaging system has the characteristics of compactness and low distortion rate imaging, and the optical system can be suitable for a separation measurement sensor. The lens has high performance, compact type and wide temperature application range, has low cost and low power consumption, can realize athermalization design of the functional lens for clearly imaging a space target, has good imaging quality in a working environment without 50 ℃ to 90 ℃ below zero, and realizes a wide temperature suitable range.
An imaging method of a low-distortion light high-definition lens comprises the following steps: the light rays sequentially pass through the positive moon tooth lens A, the negative lens B, the negative lens C, the biconvex lens D, the negative lens E, the biconvex lens F, the biconvex lens G, the negative lens H and the biconvex lens I from left to right and then are imaged.
In this embodiment, the optical system composed of the lens groups described above achieves the following optical indexes:
a) Spectral range: visible light wave bands of 400 nm-700 nm;
b) Field of view requirement (2ω):
1. horizontal field of view: 75 ° +5° 0 °;
2. vertical field of view: 60 ° +5° 0 °;
c) Relative pore size: f/2.5;
d) Transfer function (227 lp/mm at Nyquist frequency): more than or equal to 0.2 (0.7 field of view) and more than or equal to 0.15 (full field of view);
e) Relative distortion: less than or equal to 2.5 percent (full field of view);
f) Multiplying power chromatic aberration: 1 μm (full field of view);
g) Total weight of the optical system: 7.1g (including lenses, barrels, excluding protective lenses);
h) Total optical length: 14mm;
i) Operating temperature: performing athermalization analysis and design at the temperature of-50 ℃ to +90 ℃;
in this embodiment, the parameters of each lens are shown in the following table:
in this embodiment, fig. 2 to 5 can see that at 227lp/mm at the nyquist frequency: the Modulation Transfer Function (MTF) of the field of view is more than or equal to 0.2, the Modulation Transfer Function (MTF) of the full field of view is more than or equal to 0.15, the system distortion is less than 2.5%, and the high-definition imaging of the system is satisfied. Therefore, the invention can meet the requirements of low distortion and high resolution of the system.
While the foregoing is directed to the preferred embodiment, other and further embodiments of the invention will be apparent to those skilled in the art from the following description, wherein the invention is described, by way of illustration and example only, and it is intended that the invention not be limited to the specific embodiments illustrated and described, but that the invention is to be limited to the specific embodiments illustrated and described.
Claims (3)
1. A low distortion light and handy high definition camera lens, its characterized in that: the optical system of the lens sequentially comprises a positive crescent lens A, a negative lens B, a negative lens C, a biconvex lens D, a negative lens E, a biconvex lens F, a biconvex lens G, a negative lens H and a biconvex lens I along the incidence direction of light rays from left to right; the air interval between the positive moon tooth lens A and the negative lens B is 0.08mm, the air interval between the negative lens B and the negative lens C is 1.06mm, the air interval between the negative lens C and the biconvex lens D is 0.51mm, the air interval between the biconvex lens D and the negative lens E is 0.12mm, the air interval between the negative lens E and the biconvex lens F is 0.12mm, the air interval between the biconvex lens F and the biconvex lens G is 0.08mm, the air interval between the biconvex lens G and the negative lens H is 0.08mm, and the air interval between the negative lens H and the biconvex lens I is 0.21mm; the radius of curvature of the orthodontic lens A facing the object side is 15mm < R <20mm, the refractive index is 1.52, the radius of curvature of the orthodontic lens A facing the image side is 190mm < R <200mm, and the refractive index is 1.00; the radius of curvature of the negative lens B towards the object side is 5mm < R <10mm, the refractive index is 1.90, the radius of curvature of the negative lens B towards the image side is 2mm < R <7mm, and the refractive index is 1.00; the radius of curvature of the negative lens C towards the object side is 5mm < R <10mm, the refractive index is 1.88, the radius of curvature towards the image side is 2mm < R <7mm, and the refractive index is 1.00; the curvature radius of the biconvex lens D towards the object side surface is 10mm < R <15mm, the refractive index is 1.92, the curvature radius of the biconvex lens D towards the image side surface is 12mm < R <17mm, and the refractive index is 1.00; the radius of curvature of the negative lens E towards the object side is 4mm < R <9mm, the refractive index is 1.80, the radius of curvature towards the image side is 1mm < R <6mm, and the refractive index is 1.00; the curvature radius of the biconvex lens F towards the object side surface is 1mm < R <6mm, the refractive index is 1.81, the curvature radius towards the image side surface is 4mm < R <9mm, and the refractive index is 1.00; the curvature radius of the biconvex lens G towards the object side surface is 5mm < R <10mm, the refractive index is 1.76, the curvature radius towards the image side surface is 15mm < R <20mm, and the refractive index is 1.00; the radius of curvature of the negative lens H towards the object side is 3mm < R <8mm, the refractive index is 1.92, the radius of curvature towards the image side is 1mm < R <5mm, and the refractive index is 1.00; the radius of curvature of the biconvex lens I toward the object side is 8mm < R <13mm, the refractive index is 1.76, the radius of curvature toward the image side is 5mm < R <10mm, and the refractive index is 1.00.
2. The low distortion lightweight high definition lens of claim 1, wherein: the mechanical structure of the lens comprises a main lens barrel, wherein a positive moon tooth lens A, a negative lens B, a negative lens C, a biconvex lens D, a negative lens E, a biconvex lens F, a biconvex lens G, a negative lens H and a biconvex lens I are sequentially arranged in the main lens barrel along the incidence direction of light rays from left to right; the external thread at the front end of the main lens barrel is in threaded connection with a front protection lens cover, the external thread at the front end of the front protection lens cover is in threaded connection with a front protection sheet pressing ring, and a front protection sheet is arranged between the front protection sheet pressing ring and the front protection lens cover; the front end of the positive crescent lens A is provided with a front pressing ring; an AB space ring is arranged between the positive crescent lens A and the negative lens B, a DE space ring is arranged between the biconvex lens D and the negative lens E, an FG space ring is arranged between the biconvex lens F and the biconvex lens G, and a GH space ring is arranged between the biconvex lens G and the negative lens H; the rear mirror cover is arranged at the rear end of the main mirror cylinder, so that the whole protection of the lens can be realized.
3. A method for imaging a low distortion light high definition lens as claimed in any one of claims 1 to 2, comprising the steps of: the light rays sequentially pass through the positive moon tooth lens A, the negative lens B, the negative lens C, the biconvex lens D, the negative lens E, the biconvex lens F, the biconvex lens G, the negative lens H and the biconvex lens I from left to right and then are imaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442444.5A CN109407275B (en) | 2018-11-29 | 2018-11-29 | Low-distortion light high-definition lens and imaging method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811442444.5A CN109407275B (en) | 2018-11-29 | 2018-11-29 | Low-distortion light high-definition lens and imaging method thereof |
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| CN109407275A CN109407275A (en) | 2019-03-01 |
| CN109407275B true CN109407275B (en) | 2024-01-16 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1456622A (en) * | 1974-05-08 | 1976-11-24 | Asahi Optical Co Ltd | Wide angle lens system |
| JPH06160714A (en) * | 1992-08-31 | 1994-06-07 | Us Precision Lens Inc | Zoom projection lens and its manufacture |
| JP2002328300A (en) * | 2001-04-27 | 2002-11-15 | Olympus Optical Co Ltd | Front diaphragm image pickup optical system |
| CN101365975A (en) * | 2007-03-08 | 2009-02-11 | 里程碑株式会社 | Imaging lens |
| JP2010210883A (en) * | 2009-03-10 | 2010-09-24 | Ricoh Co Ltd | Imaging lens, camera and personal digital assistance device |
| JP2018005133A (en) * | 2016-07-08 | 2018-01-11 | キヤノン株式会社 | Large-aperture standard lens |
| CN209167645U (en) * | 2018-11-29 | 2019-07-26 | 福建福光股份有限公司 | A kind of low light and handy high definition camera lens of distortion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9632290B2 (en) * | 2014-09-16 | 2017-04-25 | Panasonic Intellectual Property Management Co., Ltd. | Wide-angle lens system and imaging apparatus |
-
2018
- 2018-11-29 CN CN201811442444.5A patent/CN109407275B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1456622A (en) * | 1974-05-08 | 1976-11-24 | Asahi Optical Co Ltd | Wide angle lens system |
| JPH06160714A (en) * | 1992-08-31 | 1994-06-07 | Us Precision Lens Inc | Zoom projection lens and its manufacture |
| JP2002328300A (en) * | 2001-04-27 | 2002-11-15 | Olympus Optical Co Ltd | Front diaphragm image pickup optical system |
| CN101365975A (en) * | 2007-03-08 | 2009-02-11 | 里程碑株式会社 | Imaging lens |
| JP2010210883A (en) * | 2009-03-10 | 2010-09-24 | Ricoh Co Ltd | Imaging lens, camera and personal digital assistance device |
| JP2018005133A (en) * | 2016-07-08 | 2018-01-11 | キヤノン株式会社 | Large-aperture standard lens |
| CN209167645U (en) * | 2018-11-29 | 2019-07-26 | 福建福光股份有限公司 | A kind of low light and handy high definition camera lens of distortion |
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| CN109407275A (en) | 2019-03-01 |
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