CN101762871A - Optical system of attitude sensor - Google Patents
Optical system of attitude sensor Download PDFInfo
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- CN101762871A CN101762871A CN200910243281A CN200910243281A CN101762871A CN 101762871 A CN101762871 A CN 101762871A CN 200910243281 A CN200910243281 A CN 200910243281A CN 200910243281 A CN200910243281 A CN 200910243281A CN 101762871 A CN101762871 A CN 101762871A
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Abstract
The invention discloses an optical system of an attitude sensor. A diaphragm of the optical system is arranged on the first surface of the quartz window plate glass of the optical system, which is beneficial to reducing the size of the optical system and eliminating parasitic light; and the optical system can simultaneously realize large field, large aperture and achromatism by utilizing four common optical materials and effectively shorten the size of the optical system by using a plurality of osculant positive and negative lenses to correct aberration. By adopting the layout mode, the optical system has higher MTF (modulation transfer function) while ensuring relatively uniform full field defocused spots, thereby being capable of giving consideration to both the optical imaging of a star sensor and the imaging of the optical sensor with high resolution requirements.
Description
Technical field
The present invention relates to a kind of optical system of attitude sensor, can be used as the optical lens of optical attitude sensor, also can be used as the optical lens of other imaging-type optical sensor.
Background technology
In optical system, there is a class to belong to sensor lens, measures sensor lens etc. as lens of star sensor, intersection butt joint.The sensor lens imaging arrangement generally can be divided three classes, and a class is a refraction type, and a class is that refraction is reflective, and it is reflective also having a class.The application of refraction type is more in this three class, and other two classes are used less.General common have Gauss's imaging arrangement of employing and a thatch watt imaging arrangement in refraction type, the advantage of Gauss's formula is that structure is symmetrically distributed with respect to aperture diaphragm, off-axis aberration has negative function, therefore can obtain bigger field angle, shortcoming is that to be positioned at the eyeglass bore at camera lens two ends bigger, weight increases, and is unfavorable for that sun veiling glare suppresses.The thatch watt general aperture diaphragm of type camera lens is positioned at first face of camera lens, and whole camera lens can have less physical dimension, also helps eliminate stray light, and shortcoming is that field angle is less relatively.As: Yang Haoming etc. are in " big visual field, large aperture Light and Compact Optical Systems for Star Sensors " literary composition of delivering on the optics precision engineering in February, 2007, a focal length 22.5mm has been proposed, relative aperture 1/1.2, the design of lens of star sensor that field angle is 25 °, employing be the double gauss imaging arrangement.Its aperture diaphragm is positioned at the position, optical center, and lens construction is symmetry relatively, helps proofreading and correct the visual field aberration, and its shortcoming is that the camera lens radial dimension is bigger.Wang Hu etc. have designed a focal length 51mm in the article " wide visual field object lens of large relative aperture star sensor design of Optical System " that in Dec, 2005, the photon journal was delivered, relative aperture 1/1.1, the star sensor optical system that field angle is 30 °, it also is the imaging arrangement that has adopted a kind of double gauss pattern, its relative merits are identical with last example, aspect the field angle raising arranged.Wu Feng etc. in November, 2004 the photon journal delivered one piece of article " Light and Compact Optical Systems for Star Sensors design ", designed a focal length 22.7mm, relative aperture 1/1.4, the star sensor optical system that field angle is 24 °, the imaging arrangement that adopts is that the 3rd lens front is as aperture diaphragm, two eyeglasses in front play the effect that enlarges the visual field, and shortcoming is that these two eyeglass radial dimensions are bigger.The patent CN101209753A of Hao Yuncai discloses a kind of star sensor imaging system structure, has adopted a thatch watt type optical imagery structure, has implemented a focal length 49.7mm, relative aperture 1/1.2, the optical lens that field angle is 14 °.
Summary of the invention
The technical matters that the present invention solves is: overcome the deficiencies in the prior art, a kind of optical system of attitude sensor is provided, physical dimension is little, has big field angle, can take into account star sensor optical imaging and have the optical sensor imaging that high resolving power requires.
Technical solution of the present invention is: a kind of optical system of attitude sensor, by aperture diaphragm, quartz window sheet glass, positive lens, the bent moon positive lens, first double-concave negative lens, the first biconvex positive lens, the second biconvex positive lens, the 3rd biconvex positive lens, the 4th biconvex positive lens, second double-concave negative lens, the 5th biconvex positive lens and bent moon negative lens are formed, wherein positive lens becomes the bent moon positive lens groups with the bent moon positive lens groups, first double-concave negative lens and first biconvex positive lens composition connect airtight negative positive lens groups, the second biconvex positive lens and the 3rd biconvex positive lens groups composition focal power mirror group, the 4th biconvex positive lens and second double-concave negative lens composition connect airtight positive negative lens group, the 5th biconvex positive lens is formed two positive negative lens group of separating with the bent moon negative lens, aperture diaphragm is positioned at first optical surface of quartz window sheet glass, incident light is by aperture diaphragm and quartz window sheet glass, pass through positive lens successively, the bent moon positive lens, first double-concave negative lens, the first biconvex positive lens, the second biconvex positive lens, the 3rd biconvex positive lens, the 4th biconvex positive lens, second double-concave negative lens, the 5th biconvex positive lens and bent moon negative lens see through detector window at last and receive processing by photodetector;
The thickness of described quartz window sheet glass is 1/5～1/8 with the ratio of clear aperture;
The Center Gap of described positive lens and quartz window sheet glass is 0.05mm～1mm;
The Center Gap of described bent moon positive lens and positive lens is 1/3～1/8 with the ratio of optical system focal length, and the bent moon positive lens is a bent moon positive lens left, and its thickness is 1/5～1/8 with the clear aperture ratio;
Described first double-concave negative lens is a double-concave negative lens, and its ratio with the Center Gap of bent moon positive lens and optical system focal length is 1/3～1/10;
The described first biconvex positive lens is the biconvex positive lens, and its ratio with the Center Gap of first double-concave negative lens and optical system focal length is 1/3～1/8;
The described second biconvex positive lens is the biconvex positive lens, and its ratio with the Center Gap of the first biconvex positive lens and optical system focal length is 1/3～1/8;
Described the 3rd biconvex positive lens is the biconvex positive lens, and its ratio with the Center Gap of the second biconvex positive lens and optical system focal length is 1/3～1/8;
Described the 4th biconvex positive lens is the biconvex positive lens, and its ratio with the Center Gap of the 3rd biconvex positive lens and optical system focal length is 1/3～1/8;
Described second double-concave negative lens is a double-concave negative lens, and its ratio with the Center Gap of the 4th biconvex positive lens and optical system focal length is 1/3～1/10;
Described the 5th biconvex positive lens is the biconvex positive lens, and its ratio with the Center Gap of second double-concave negative lens and optical system focal length is 1/3～1/8;
Described bent moon negative lens is protruding sphere near the one side of detector window glass, and its ratio with the Center Gap of the 5th biconvex positive lens and optical system focal length is 1/3～1/10.
Described bent moon positive lens, the 4th biconvex positive lens adopt crown class glass.
Described positive lens, first double-concave negative lens, the first biconvex positive lens, the second biconvex positive lens, the 3rd biconvex positive lens adopt flint class glass.
Described second double-concave negative lens, bent moon negative lens adopt dense flint class glass.
Described the 5th biconvex positive lens adopts lanthanum flint class glass.
The beneficial effect that the present invention has compared to existing technology is: smooth field of the present invention is in first face of optical system quartz window sheet glass, help reducing the optical system size, help eliminating veiling glare, optical system utilizes four kinds of ordinary optical materials can realize big visual field simultaneously, large aperture and achromatism, use many groups to connect airtight the positive negative lens group aberration correction of type, effectively shorten the optical system size, adopt distribution form of the present invention therefore can take into account star sensor optical imaging and to have the optical sensor imaging that high resolving power requires guaranteeing that full visual field disc of confusion has higher MTF (modulation transfer function) relatively uniformly simultaneously.
Description of drawings
Fig. 1 is the composition structural representation of optical system of the present invention;
Fig. 2 is the ratio chromatism, curve of the embodiment of the invention;
Fig. 3 is the MTF curve of the embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done further detailed description:
Optical system of the present invention mainly is made up of 11 lens, as shown in Figure 1, by aperture diaphragm, quartz window sheet glass 1, positive lens 2, bent moon positive lens 3, first double-concave negative lens 4, the first biconvex positive lens 5, the second biconvex positive lens 6, the 3rd biconvex positive lens 7, the 4th biconvex positive lens 8, second double-concave negative lens 9, the 5th biconvex positive lens 10 and bent moon negative lens 11 are formed, wherein positive lens 2 and bent moon positive lens 3 are formed the bent moon positive lens groups, first double-concave negative lens 4 and the first biconvex positive lens, 5 compositions connect airtight negative positive lens groups, the second biconvex positive lens 6 and the 3rd biconvex positive lens 7 are formed and are divided focal power mirror group, the 4th biconvex positive lens 8 and second double-concave negative lens, 9 compositions connect airtight positive negative lens group, the 5th biconvex positive lens 10 is formed two positive negative lens group of separating with bent moon negative lens 11, aperture diaphragm is positioned at first optical surface of quartz window sheet glass 1, incident light is by aperture diaphragm and quartz window sheet glass 1, pass through positive lens 2 successively, bent moon positive lens 3, first double-concave negative lens 4, the first biconvex positive lens 5, the second biconvex positive lens 6, the 3rd biconvex positive lens 7, the 4th biconvex positive lens 8, second double-concave negative lens 9, the 5th biconvex positive lens 10 and bent moon negative lens 11 see through detector window 12 at last and receive processing by photodetector; This structure can obtain big visual field and large aperture.
The thickness of quartz window sheet glass 1 is 1/5～1/8 with the ratio of clear aperture, and the minimum dimension of its thickness can not be less than the allowed minimum value of processing technology.Positive lens 2 is 0.05mm～1mm with the Center Gap of quartz window sheet glass 1; Material is a flint class glass; The Center Gap of bent moon positive lens 3 and positive lens 2 is 1/3～1/8 with the ratio of optical system focal length, and bent moon positive lens 3 is a bent moon positive lens left, and its thickness is 1/5～1/8 with the clear aperture ratio; Material is a crown class glass; First double-concave negative lens 4 is a double-concave negative lens, and its ratio with the Center Gap of bent moon positive lens 3 and optical system focal length is 1/3～1/10; Material is a flint class glass; The first biconvex positive lens 5 is the biconvex positive lens, and its ratio with the Center Gap of first double-concave negative lens 4 and optical system focal length is 1/3～1/8; Material is a flint class glass; The second biconvex positive lens 6 is the biconvex positive lens, and its ratio with the Center Gap of the first biconvex positive lens 5 and optical system focal length is 1/3～1/8; Material is a flint class glass; The 3rd biconvex positive lens 7 is the biconvex positive lens, and its ratio with the Center Gap of the second biconvex positive lens 6 and optical system focal length is 1/3～1/8; Material is a flint class glass; The 4th biconvex positive lens 8 is the biconvex positive lens, and its ratio with the Center Gap of the 3rd biconvex positive lens 7 and optical system focal length is 1/3～1/8; Material is a crown class glass; Second double-concave negative lens 9 is a double-concave negative lens, and its ratio with the Center Gap of the 4th biconvex positive lens 8 and optical system focal length is 1/3～1/10; Material is a dense flint class glass; The 5th biconvex positive lens 10 is the biconvex positive lens, and its ratio with the Center Gap of second double-concave negative lens 9 and optical system focal length is 1/3～1/8; Material is a lanthanum flint class glass; Bent moon negative lens 11 is protruding spheres near the one side of detector window glass 12, and its ratio with the Center Gap of the 5th biconvex positive lens 10 and optical system focal length is 1/3～1/10, and material is a dense flint class glass.Detector protection window 12 generally is the window that sensitive detection parts carry, and about thickness 1mm, material is generally optical glass.
More than the center thickness of all lens itself all meet the desired minimum thickness requirement of optics processing technology, 11 lens have adopted 4 kinds of optical glass to finish design except silica glass window, comprise QK3, ZF6, LaF3, ZK9, kind is few, is convenient to processing and manufacturing and batch process.
Embodiment: according to above-mentioned optical system structure design, according to above-mentioned design, the focal length of optical system is 29mm, relative aperture: 1/1.2, the field angle of optical system: 46 °, spectrum segment: 500nm-800nm, object distance: infinity, the light hurdle: at first face of quartz window sheet glass, the structural parameters of designing are:
Face sequence number spherical radius (mm) Center Gap
Quartz window sheet glass 1:
1： INFINITY 3.000000
2： INFINITY 0.740000
Positive lens 2:
3： -121.40000 4.550000
4： -45.08500 5.620000
Bent moon positive lens 3:
5： -20.70000 5.400000
6： -18.40300 1.380000
First double-concave negative lens 4:
7： -18.00000 4.790000
8： 132.62000 0.100000
The first biconvex positive lens 5:
9： 134.37000 10.010000
10： -39.76000 0.100000
The second biconvex positive lens 6:
11： -394.10000 7.070000
12： -56.52490 0.100000
The 3rd biconvex positive lens 7:
13： 44.68100 9.970000
14： -216.73000 0.100000
The 4th biconvex positive lens 8:
15： 30.55000 9.520000
16： -159.25300 0.310000
Second double-concave negative lens 9
17： -121.34000 4.200000
18： 15.77600 2.870000
The 5th biconvex positive lens 10
19： 42.65600 5.660000
20： -52.00000 0.750000
Bent moon negative lens 11
21： -33.10000 2.600000
22： -105.68000 8.000000
The line on the left side represents ratio chromatism, between the 800nm-500nm with the field angle change curve among Fig. 2, ratio chromatism, maximum in the complete as can be seen field range is in 8 μ m, the curve on the right side represents ratio chromatism, between the 650nm-500nm with the field angle change curve, ratio chromatism, maximum in the complete as can be seen field range is in 25 μ m, hence one can see that, adopts common optical material to realize achromatism effect preferably under the condition of large aperture, big visual field.
On behalf of each relative visual field, the curve among Fig. 3 comprise (0,0.2,0.4 respectively, 0.8,1.0), each spectral coverage (500nm, 600nm, 650nm, 700nm, 800nm) average weighted meridian and sagitta of arc direction MTF are with the result of spatial frequency variation, by the curve among the figure as can be seen, under spatial frequency 42Lp/mm, the complete minimum MTF in visual field reaches more than 0.3, illustrates under 46 ° of field angle and several 1.2 conditions of F, has realized the MTF level that full visual field is higher under higher frequency space.
The present invention not detailed description is a technology as well known to those skilled in the art.
Claims (5)
1. optical system of attitude sensor, it is characterized in that: by aperture diaphragm, quartz window sheet glass (1), positive lens (2), bent moon positive lens (3), first double-concave negative lens (4), the first biconvex positive lens (5), the second biconvex positive lens (6), the 3rd biconvex positive lens (7), the 4th biconvex positive lens (8), second double-concave negative lens (9), the 5th biconvex positive lens (10) and bent moon negative lens (11) are formed, wherein positive lens (2) and bent moon positive lens (3) are formed the bent moon positive lens groups, first double-concave negative lens (4) and the first biconvex positive lens (5) composition connect airtight negative positive lens groups, the second biconvex positive lens (6) and the 3rd biconvex positive lens (7) are formed and are divided focal power mirror group, the 4th biconvex positive lens (8) and second double-concave negative lens (9) composition connect airtight positive negative lens group, the 5th biconvex positive lens (10) is formed two positive negative lens group of separating with bent moon negative lens (11), aperture diaphragm is positioned at first optical surface of quartz window sheet glass (1), incident light is by aperture diaphragm and quartz window sheet glass (1), pass through positive lens (2) successively, bent moon positive lens (3), first double-concave negative lens (4), the first biconvex positive lens (5), the second biconvex positive lens (6), the 3rd biconvex positive lens (7), the 4th biconvex positive lens (8), second double-concave negative lens (9), the 5th biconvex positive lens (10) and bent moon negative lens (11) see through detector window (12) at last and receive processing by photodetector;
The thickness of described quartz window sheet glass (1) is 1/5～1/8 with the ratio of clear aperture;
Described positive lens (2) is 0.05mm～1mm with the Center Gap of quartz window sheet glass (1);
The Center Gap of described bent moon positive lens (3) and positive lens (2) is 1/3～1/8 with the ratio of optical system focal length, and bent moon positive lens (3) is a bent moon positive lens left, and its thickness is 1/5～1/8 with the clear aperture ratio;
Described first double-concave negative lens (4) is a double-concave negative lens, and the Center Gap of itself and bent moon positive lens (3) is 1/3～1/10 with the ratio of optical system focal length;
The described first biconvex positive lens (5) is the biconvex positive lens, and the Center Gap of itself and first double-concave negative lens (4) is 1/3～1/8 with the ratio of optical system focal length;
The described second biconvex positive lens (6) is the biconvex positive lens, and the Center Gap of itself and the first biconvex positive lens (5) is 1/3～1/8 with the ratio of optical system focal length;
Described the 3rd biconvex positive lens (7) is the biconvex positive lens, and the Center Gap of itself and the second biconvex positive lens (6) is 1/3～1/8 with the ratio of optical system focal length;
Described the 4th biconvex positive lens (8) is the biconvex positive lens, and the Center Gap of itself and the 3rd biconvex positive lens (7) is 1/3～1/8 with the ratio of optical system focal length;
Described second double-concave negative lens (9) is a double-concave negative lens, and the Center Gap of itself and the 4th biconvex positive lens (8) is 1/3～1/10 with the ratio of optical system focal length;
Described the 5th biconvex positive lens (10) is the biconvex positive lens, and the Center Gap of itself and second double-concave negative lens (9) is 1/3～1/8 with the ratio of optical system focal length;
Described bent moon negative lens (11) is protruding sphere near the one side of detector window glass (12), and the Center Gap of itself and the 5th biconvex positive lens (10) is 1/3～1/10 with the ratio of optical system focal length.
2. a kind of optical system of attitude sensor according to claim 1 is characterized in that: described bent moon positive lens (3), the 4th biconvex positive lens (8) adopt crown class glass.
3. a kind of optical system of attitude sensor according to claim 1 is characterized in that: described positive lens (2), first double-concave negative lens (4), the first biconvex positive lens (5), the second biconvex positive lens (6), the 3rd biconvex positive lens (7) adopt flint class glass.
4. a kind of optical system of attitude sensor according to claim 1 is characterized in that: described second double-concave negative lens (9), bent moon negative lens (11) adopt dense flint class glass.
5. a kind of optical system of attitude sensor according to claim 1 is characterized in that: described the 5th biconvex positive lens (10) adopts lanthanum flint class glass.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372093A (en) * | 2010-08-17 | 2012-03-14 | 上海卫星工程研究所 | Method for configuration of star sensor head |
| CN104469167A (en) * | 2014-12-26 | 2015-03-25 | 小米科技有限责任公司 | Automatic focusing method and device |
| CN107367828A (en) * | 2017-09-15 | 2017-11-21 | 东莞市宇瞳光学科技股份有限公司 | A kind of large aperture 4K tight shots |
| CN108254882A (en) * | 2018-02-06 | 2018-07-06 | 中国科学院西安光学精密机械研究所 | Ultra-large vision field pin hole optical imaging system |
| CN109254383A (en) * | 2018-10-11 | 2019-01-22 | 佛山科学技术学院 | A kind of optical system of star sensor that wide spectrum is small-sized |
| CN112630945A (en) * | 2020-11-30 | 2021-04-09 | 凤凰光学股份有限公司 | High-pixel long-focus infrared confocal optical lens |
| CN117250736A (en) * | 2023-11-17 | 2023-12-19 | 南京信息工程大学 | Large-image-surface high-resolution wide-spectrum star sensor optical system |
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2009
- 2009-12-30 CN CN2009102432812A patent/CN101762871B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372093A (en) * | 2010-08-17 | 2012-03-14 | 上海卫星工程研究所 | Method for configuration of star sensor head |
| CN102372093B (en) * | 2010-08-17 | 2013-12-18 | 上海卫星工程研究所 | Method for configuration of star sensor head |
| CN104469167A (en) * | 2014-12-26 | 2015-03-25 | 小米科技有限责任公司 | Automatic focusing method and device |
| US9729775B2 (en) | 2014-12-26 | 2017-08-08 | Xiaomi Inc. | Auto-focusing method and auto-focusing device |
| CN104469167B (en) * | 2014-12-26 | 2017-10-13 | 小米科技有限责任公司 | Atomatic focusing method and device |
| CN107367828A (en) * | 2017-09-15 | 2017-11-21 | 东莞市宇瞳光学科技股份有限公司 | A kind of large aperture 4K tight shots |
| CN108254882A (en) * | 2018-02-06 | 2018-07-06 | 中国科学院西安光学精密机械研究所 | Ultra-large vision field pin hole optical imaging system |
| CN109254383A (en) * | 2018-10-11 | 2019-01-22 | 佛山科学技术学院 | A kind of optical system of star sensor that wide spectrum is small-sized |
| CN109254383B (en) * | 2018-10-11 | 2023-11-28 | 佛山科学技术学院 | Wide-spectrum light and small star sensor optical system |
| CN112630945A (en) * | 2020-11-30 | 2021-04-09 | 凤凰光学股份有限公司 | High-pixel long-focus infrared confocal optical lens |
| CN117250736A (en) * | 2023-11-17 | 2023-12-19 | 南京信息工程大学 | Large-image-surface high-resolution wide-spectrum star sensor optical system |
| CN117250736B (en) * | 2023-11-17 | 2024-01-26 | 南京信息工程大学 | Large-image-surface high-resolution wide-spectrum star sensor optical system |
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