CN104501805B - Object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision - Google Patents
Object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision Download PDFInfo
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- CN104501805B CN104501805B CN201410820853.XA CN201410820853A CN104501805B CN 104501805 B CN104501805 B CN 104501805B CN 201410820853 A CN201410820853 A CN 201410820853A CN 104501805 B CN104501805 B CN 104501805B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
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Abstract
Object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision, belong to technical field of optical, in order to overcome the problem of prior art is present, the optical system is set that focal power is positive preceding group and focal power is positive rear group by the incident order of light respectively, and the front lens group is made up of secondary mirror, principal reflection mirror；The rear microscope group is made up of the first meniscus, the second meniscus, the 3rd meniscus and parallel plate glass, and first meniscus, the second meniscus and the 3rd meniscus are spherical lens；Airspace between the secondary mirror and first meniscus is 68.034, the airspace of the secondary mirror and principal reflection mirror is 72mm, the airspace of first meniscus and the second meniscus is 0.5mm, the airspace of second meniscus and the 3rd meniscus is 2.013mm, and the airspace of the 3rd meniscus and parallel plate glass is 7.328mm.
Description
Technical field
The present invention relates to a kind of catadioptric emitting optical system of star sensor, belong to technical field of optical.
Background technology
Star sensor has diversified imaging model according to the wavelength band, type photodetector that use.Their performance
Indicator difference is larger, mostly using the transmission-type of total transmissivity eyeglass, the general 20mm~60mm of system focal length, as effective Entry pupil diameters
10mm~50mm, the incident light little energy that image detector is received in the unit interval, move into it is long as determining time of integration during appearance,
Image refresh rate is slow；Adapt to spectral region narrow；Image deformation is big, and authenticity is poor.
The content of the invention
There is the incident light little energy that image detector in the unit interval is received in the present invention, transport to solve prior art
Dynamic imaging determines during appearance that the time of integration is long, and image refresh rate is slow；Adapt to spectral region narrow；Image deformation is big, the problem of authenticity is poor,
There is provided that a kind of object lens of large relative aperture, big entrance pupil area, full filed energy barycenter deviation be small, the low distortion catadioptric emitting star of high accuracy is quick
Sensor optical system, the optical system adapt to airship wide spectral range high-precision fixed appearance, reduce star sensor image and visit
The device time of integration is surveyed, the requirement that star sensor quickly determines appearance is met, expands the application of optical system of star sensor, overcomes
Penetrate this low defect of formula star sensor prior art performance indications.
The present invention solve technical problem technical scheme be：
Object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision, focal power is set by the incident order of light respectively
It is positive rear microscope group B for positive front lens group A and focal power, it is characterized in that, the front lens group A is by secondary mirror A-1, principal reflection mirror
A-2 is constituted；The rear microscope group B is put down by the first meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3 with parallel
Glass sheet B-4 is constituted, and it is saturating that the first meniscus B-1, the second meniscus B-2 and the 3rd meniscus B-3 are sphere
Mirror；
Airspace between the secondary mirror A-1 and the first meniscus B-1 is 68.034, the secondary reflection
Mirror A-1 and principal reflection mirror A-2 airspace is 72mm, the first meniscus B-1 and the second meniscus B-2 air
Interval is 0.5mm, and the airspace of the second meniscus B-2 and the 3rd meniscus B-3 are 2.013mm, the described 3rd
Meniscus B-3 and parallel plate glass B-4 airspace is 7.328mm.
The vertex curvature radius of two speculums, quadratic surface coefficient meet following condition respectively in front lens group A：
-243<RA-1<-232 -1.55<KA-1<-1.51
-188<RA-2<-178 -18.9<KA-2<-17.8
Wherein, RA-1、RA-2Respectively secondary mirror A-1, principal reflection mirror A-2 vertex curvature radius, KA-1、KA-2Respectively
Secondary mirror A-1, principal reflection mirror A-2 quadratic surface coefficient.
First meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3 and parallel flat glass in microscope group B afterwards
Glass B-4 focal length, refractive index and radius of curvature meets following condition respectively：
Wherein, f1, f2, f3, f4 are respectively the first meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3
With parallel plate glass B-4 focal length, n-1, n-2, n-3, n-4 be respectively the first meniscus B-1, the second meniscus B-2,
3rd meniscus B-3 and parallel plate glass B-4 glass materials refractive index, R1-1、R1-2Before first meniscus B-1
Surface radius, R afterwards2-1、R2-2It is the second meniscus B-2 front and rear surfaces radius, R3-1、R3-2It is the 3rd meniscus B-3
Front and rear surfaces radius, R4-1、R4-2It is parallel plate glass B-4 front and rear surfaces radius.
The beneficial effects of the invention are as follows：
1) by area of computer aided optical design and optimization, after preferably being alleviated from suitable front lens group mirror surface type
The aberration correction pressure of microscope group lens element, rear microscope group number of elements reduces to minimum, while ensure that influence star sensor positioning
The vertical axial aberration of precision is preferably corrected, and the mtf value of camera lens is more than 0.75,80% blur circle energy in 40lp/mm
Concentrate in the range of 10 μ m diameters, all band self-energy barycenter deviation is less than 3 μm less than 3 μm, axle colo(u)r bias of hanging down, and adapts to high-precision
Degree airship determines the requirement of appearance.
2) two mirror surface types in front lens group are hyperboloid, coaxial to put, and reduce using bands such as high order aspheric surfaces
The alignment error for carrying out the difficulty of face type detection and putting off axis, rear three lens elements of microscope group are spherical surface type, lens element
Quantitative commitments high transmittance and relatively low alignment error.
3) wavelength band of the system is wider compared to traditional star sensor wavelength band, and full filed distortion is less than
0.036%, meet the complicated stellar spectra of following survey of deep space and image deformation requirement.
4) the system front lens group effectively increases system Entry pupil diameters, the effective entrance pupil face of system in the form of speculum
Product reaches 5106mm2, there is bigger entrance pupil area, star sensor image planes in the unit interval compared to traditional transmission-type star sensor
Detector can receive more light energies, it is adaptable to which more faint stars reduce dynamic and determine appearance as the complex situations of positioning star
Time.
5) front lens group reflecting mirror material is SiC, and rear group lens material is domestic optical glass, not using special material
Material, reduces optical system material purchases difficulty and manufacturing cost.
6) three lens element diameters are approximate in microscope group afterwards, it is to avoid step occur in lens barrel after eyeglass bag microscope base, it is ensured that
The radially installed precision of each lens, is easy to the processing and grinding of lens barrel in later stage actual production.
Brief description of the drawings
Fig. 1 is object lens of large relative aperture of the present invention catadioptric emitting optical system of star sensor structural representation in high precision.
Fig. 2 is rear microscope group light channel structure schematic diagram of the present invention.
Fig. 3 is the MTF curve of optical system of the present invention.
Fig. 4 is optical system point range figure of the present invention.
Fig. 5 is optical system energy distribution curve of the present invention.
Embodiment
As shown in figure 1, the light path design of the present invention is as follows：Object lens of large relative aperture catadioptric emitting star sensor optical system in high precision
System, is set that focal power is positive front lens group A and focal power is positive rear microscope group B by the incident order of light respectively, it is characterized in that, institute
Front lens group A is stated to be made up of secondary mirror A-1, principal reflection mirror A-2；The rear microscope group B is by the first meniscus B-1, the second convex-concave
Lens B-2, the 3rd meniscus B-3 and parallel plate glass B-4 are constituted, the first meniscus B-1, the second meniscus
B-2 and the 3rd meniscus B-3 are spherical lens；
Airspace between the secondary mirror A-1 and the first meniscus B-1 is 68.034, the secondary reflection
Mirror A-1 and principal reflection mirror A-2 airspace is 72mm, the first meniscus B-1 and the second meniscus B-2 air
Interval is 0.5mm, and the airspace of the second meniscus B-2 and the 3rd meniscus B-3 are 2.013mm, the described 3rd
Meniscus B-3 and parallel plate glass B-4 airspace is 7.328mm.
The vertex curvature radius of two speculums, quadratic surface coefficient meet following condition respectively in front lens group A：
-243<RA-1<-232 -1.55<KA-1<-1.51
-188<RA-2<-178 -18.9<KA-2<-17.8
Wherein, RA-1、RA-2Respectively secondary mirror A-1, principal reflection mirror A-2 vertex curvature radius, KA-1、KA-2Respectively
Secondary mirror A-1, principal reflection mirror A-2 quadratic surface coefficient.
First meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3 and parallel flat glass in microscope group B afterwards
Glass B-4 focal length, refractive index and radius of curvature meets following condition respectively：
Wherein, f1, f2, f3, f4 are respectively the first meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3
With parallel plate glass B-4 focal length, n-1, n-2, n-3, n-4 be respectively the first meniscus B-1, the second meniscus B-2,
3rd meniscus B-3 and parallel plate glass B-4 glass materials refractive index, R1-1、R1-2Before first meniscus B-1
Surface radius, R afterwards2-1、R2-2It is the second meniscus B-2 front and rear surfaces radius, R3-1、R3-2It is the 3rd meniscus B-3
Front and rear surfaces radius, R4-1、R4-2It is parallel plate glass B-4 front and rear surfaces radius.
Embodiment：
As shown in figure 1, being set respectively by the incident order of light, focal power is positive front lens group A and focal power is positive rear mirror
B is organized, the front lens group A is made up of secondary mirror A-1, principal reflection mirror A-2, focal length fA'=247.63mm；The rear microscope group B by
First meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3 and parallel plate glass B-4 are constituted, and described first
Meniscus B-1, the second meniscus B-2 and the 3rd meniscus B-3 are spherical lens, focal length fB'=141.811mm.
Airspace between front lens group A and rear microscope group B is 68.034mm.
Secondary mirror A-1 and principal reflection mirror A-2 airspace are 72mm.
First meniscus B-1 and the second meniscus B-2 airspace are 0.5mm.
Second meniscus B-2 and the 3rd meniscus B-3 airspace is 2.013mm.
3rd meniscus B-3 and parallel plate glass B-4 airspace is 7.328mm.
First meniscus B-1 front and rear surfaces radius is 18.815mm, 10.980mm respectively.
Second meniscus B-2 front and rear surfaces radius is 10.866mm, 11.518mm respectively.
3rd meniscus B-3 front and rear surfaces radius is 12.578mm, 31.545mm respectively.
Group parallel plate glass B-4 front and rear surfaces radiuses are plane afterwards.
First meniscus B-1 glass materials refractive index is 1.755.
Second meniscus B-2 glass materials refractive index is 1.620.
3rd meniscus B-3 glass materials refractive index is 1.487.
Group meniscus B-4 glass materials refractive index is 1.457 afterwards.
The optical system being made up of above-mentioned lens set has reached following optical index：
1st, focal length：F '=180mm；2nd, relative aperture：F=2；3rd, practical spectral line scope：450nm~800nm；4th, visual field
Angle：2W=3 ° (image space 2y '=9.4mm)；5th, distort：<0.036%；6th, energy barycenter deviation：<3μm；7th, colo(u)r bias：<
2.5μm；8、MTF：>0.75(40lp/mm).
Claims (3)
1. object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision, the focal power is set to be respectively by the incident order of light
Positive front lens group A and focal power are positive rear microscope group B, it is characterized in that, the front lens group A is by secondary mirror A-1, principal reflection mirror A-
2 are constituted；The rear microscope group B is by the first meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3 and parallel flat
Glass B-4 is constituted, and the first meniscus B-1, the second meniscus B-2 and the 3rd meniscus B-3 are spherical lens；
Airspace between the secondary mirror A-1 and the first meniscus B-1 is 68.034mm, the secondary mirror
A-1 and principal reflection mirror A-2 airspace is 72mm, between the first meniscus B-1 and the second meniscus B-2 air
Every being 0.5mm, the airspace of the second meniscus B-2 and the 3rd meniscus B-3 are 2.013mm, and the described 3rd is convex
Concavees lens B-3 and parallel plate glass B-4 airspace is 7.328mm.
2. object lens of large relative aperture according to claim 1 catadioptric emitting optical system of star sensor in high precision, it is characterised in that
The vertex curvature radius of two speculums, quadratic surface coefficient meet following condition respectively in front lens group A：
-243<RA-1<- 232, -1.55<KA-1<-1.51；
-188<RA-2<- 178, -18.9<KA-2<-17.8；
Wherein, RA-1、RA-2Respectively secondary mirror A-1, principal reflection mirror A-2 vertex curvature radius, KA-1、KA-2It is respectively secondary anti-
Penetrate mirror A-1, principal reflection mirror A-2 quadratic surface coefficient.
3. object lens of large relative aperture according to claim 1 catadioptric emitting optical system of star sensor in high precision, it is characterised in that
First meniscus B-1 in microscope group B, the second meniscus B-2, the 3rd meniscus B-3 and parallel plate glass B-4 Jiao afterwards
Following condition is met respectively away from, refractive index and radius of curvature：
Wherein, f1, f2, f3, f4 are respectively the first meniscus B-1, the second meniscus B-2, the 3rd meniscus B-3 peace
Row plate glass B-4 focal length；N-1, n-2, n-3, n-4 are respectively the first meniscus B-1, the second meniscus B-2, the 3rd
Meniscus B-3 and parallel plate glass B-4 glass materials refractive index；R1-1、R1-2It is the first meniscus B-1 front and rear table
Radius surface；R2-1、R2-2It is the second meniscus B-2 front and rear surfaces radius；R3-1、R3-2It is the front and rear of the 3rd meniscus B-3
Surface radius；R4-1、R4-2It is parallel plate glass B-4 front and rear surfaces radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410820853.XA CN104501805B (en) | 2014-12-25 | 2014-12-25 | Object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410820853.XA CN104501805B (en) | 2014-12-25 | 2014-12-25 | Object lens of large relative aperture catadioptric emitting optical system of star sensor in high precision |
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| CN104501805A CN104501805A (en) | 2015-04-08 |
| CN104501805B true CN104501805B (en) | 2017-07-14 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109557649A (en) * | 2018-12-14 | 2019-04-02 | 中国科学院西安光学精密机械研究所 | A kind of small high image quality Catadioptric system of distortion |
| CN113835205B (en) * | 2021-09-30 | 2023-05-12 | 中国科学院长春光学精密机械与物理研究所 | Refractive and reflective imaging telescopic optical system |
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| CN101209753A (en) * | 2006-12-25 | 2008-07-02 | 北京控制工程研究所 | Star sensor system imaging structure |
| CN101477239A (en) * | 2009-01-16 | 2009-07-08 | 中国人民解放军国防科学技术大学 | Star sensor lens and its use method in large-temperature range accurate fixed star azimuth measurement |
| CN102116926A (en) * | 2009-12-31 | 2011-07-06 | 北京控制工程研究所 | Imaging structure of fixed star sensor |
| CN102279473A (en) * | 2011-06-07 | 2011-12-14 | 长春理工大学 | Optical system of star simulator |
| CN102426026A (en) * | 2010-10-22 | 2012-04-25 | 长春理工大学 | Star simulator and star sensor ground calibration device |
| CN103278156A (en) * | 2013-04-18 | 2013-09-04 | 中国科学院长春光学精密机械与物理研究所 | Ultraviolet star sensor |
| CN104061929A (en) * | 2014-07-08 | 2014-09-24 | 上海新跃仪表厂 | Common-light-path and multi-view-field star sensor and star attitude measurement method thereof |
| CN104090355A (en) * | 2014-07-02 | 2014-10-08 | 北京理工大学 | All-weather star sensor optical system |
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2014
- 2014-12-25 CN CN201410820853.XA patent/CN104501805B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209753A (en) * | 2006-12-25 | 2008-07-02 | 北京控制工程研究所 | Star sensor system imaging structure |
| CN101477239A (en) * | 2009-01-16 | 2009-07-08 | 中国人民解放军国防科学技术大学 | Star sensor lens and its use method in large-temperature range accurate fixed star azimuth measurement |
| CN102116926A (en) * | 2009-12-31 | 2011-07-06 | 北京控制工程研究所 | Imaging structure of fixed star sensor |
| CN102426026A (en) * | 2010-10-22 | 2012-04-25 | 长春理工大学 | Star simulator and star sensor ground calibration device |
| CN102279473A (en) * | 2011-06-07 | 2011-12-14 | 长春理工大学 | Optical system of star simulator |
| CN103278156A (en) * | 2013-04-18 | 2013-09-04 | 中国科学院长春光学精密机械与物理研究所 | Ultraviolet star sensor |
| CN104090355A (en) * | 2014-07-02 | 2014-10-08 | 北京理工大学 | All-weather star sensor optical system |
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