CN108345095A - A kind of low veiling glare round-the-clock star tracker optical texture of wide cut - Google Patents
A kind of low veiling glare round-the-clock star tracker optical texture of wide cut Download PDFInfo
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- CN108345095A CN108345095A CN201810296546.4A CN201810296546A CN108345095A CN 108345095 A CN108345095 A CN 108345095A CN 201810296546 A CN201810296546 A CN 201810296546A CN 108345095 A CN108345095 A CN 108345095A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
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- G—PHYSICS
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Abstract
The invention belongs to optical design arts, and in particular to a kind of low veiling glare round-the-clock star tracker optical texture of wide cut for capableing of round-the-clock observation fixed star realization navigation, its main feature is that：It is compact-sized, can effectively inhibit bias light and surface sweeping range is big.The optical texture includes scanning reflection mirror, band pass filter, the first negative lens, plane mirror, principal reflection mirror, the second negative lens, the first positive lens, the second positive lens and third negative lens；First negative lens is aperture diaphragm, and the surface of emission of principal reflection mirror is the secondary aspherical of concave, and plane mirror center offers through-hole；Incident light passes sequentially through and reflexes to principal reflection mirror by plane mirror after scanning reflection mirror, band pass filter, the first negative lens, and the light path of principal reflection mirror secondary reflection again is emitted to external imaging unit after passing sequentially through the through-hole of plane mirror, the second negative lens, the first positive lens, the second positive lens and third negative lens.
Description
Technical field
The invention belongs to optical design arts, and in particular to a kind of wide cut for capableing of round-the-clock observation fixed star realization navigation is low
Veiling glare round-the-clock star tracker optical texture.
Background technology
Inertial gyroscope is the navigation equipment for having high transient posture measurement accuracy.But the case where working long hours
Under, error is larger caused by drift value, needs to increase external calibration error equipment.In contrast, star sensor utilizes fixed star
Position navigation, no posture accumulated error, the result of detection is more accurate.Therefore, by inertial navigation system and starlight combine from
And realize that prolonged high-precision navigation is the hot spot direction studied at present.
Inertial/stellar integrated navigation relies on its high measurement accuracy, has extensive use in aerospace field.But by
It is very strong in sky background radiation on daytime, cause the contrast of daylight observation sidereal time to be differed than the contrast of night-time observation fixed star
105Times, therefore bring prodigious difficulty to the star sensor for seeing star in endoatmosphere requirements of one's work round-the-clock.
The U.S. for round-the-clock star sensor research since last century late nineteen eighties.2006, the U.S.
Microcosm Corporation systems observe the principle of three different directions using three visual fields, have developed DayStar systems,
Bore is 76mm, and 30 ° of field angle can observe 7.1Mv fixed stars (referring to article Microcosm on the sea level on daytime
announces advances in daytime stellar imaging).But required for the mode that three camera lenses are observed simultaneously
System hardware it is sufficiently complex.
BLAST systems add 4 feet of long hoods using the large-aperture long-focus camera lens of 100mm bores and 200mm focal lengths
Daytime sight star is realized in aerostat platform (referring to article BLAST autonomous daytime star cameras).
The nineties, domestic Changchun Inst. of Optics and Fine Mechanics, Chinese Academy of Sciences once use 350mm bores, the cinetheodollite of 3000mm focal lengths
It realizes in daylight observation 3Mv stars, but its volume is larger, heavier mass, is not suitable for aircraft etc. and needs small light
The occasion of system.
Patent CN201310390501.0 proposes that a kind of round-the-clock minimizes star tracking optical system, which will scan
Light path and imaging optical path overlapping, the additional clear aperature needed is very big, causes inoperative bore larger, and non-imaged light directly shines
It penetrates on the secondary mirror of optical system, introduce very strong background radiation light and is difficult to inhibit.
Invention content
In order to solve the problems, such as the spuious Xanthophyll cycle mentioned in background technology, the present invention provides it is a kind of it is compact-sized, can
Effectively inhibit bias light and has the characteristics that a kind of low veiling glare round-the-clock star tracker optical texture of the big wide cut of surface sweeping range.
The present invention specific technical solution be：
Optical facilities provided by the invention include scanning reflection mirror, band pass filter, the first negative lens, plane mirror,
Principal reflection mirror, the second negative lens, the first positive lens, the second positive lens and third negative lens；
Wherein, the first negative lens is aperture diaphragm, and the surface of emission of principal reflection mirror is the secondary aspherical of concave, plane reflection
Mirror center offers through-hole；
Incident light passes sequentially through and reflexes to master by plane mirror after scanning reflection mirror, band pass filter, the first negative lens
Speculum, the light path of principal reflection mirror secondary reflection again pass sequentially through the through-hole of plane mirror, the second negative lens, the first positive lens,
It is emitted to external imaging unit after second positive lens and third negative lens.Wherein, plane mirror makes for compression light path of transferring
It obtains system dimension to reduce, realizes miniaturization；Incident light and incident light emit through plane mirror after light path between angle
It is 30 ± 5 °.
Based on above-mentioned basic scheme, the present invention, which can also make to optimize as follows, to be limited and improves：
Further, 1000~1250mm of surface vertices radius of above-mentioned principal reflection mirror.
Further, above-mentioned first negative lens, the second negative lens, the first positive lens, the second positive lens and third negative lens
Focal length be respectively：
The focal length of first negative lens is -164f ' ＜ f '1＜ -162f '；
The focal length of second negative lens is 0.1f ' ＜ f '2＜ 0.3f '；
The focal length of first positive lens is -0.3f ' ＜ f '3＜ -0.1f '；
The focal length of second positive lens is -0.3f ' ＜ f '4＜ -0.1f '；
The focal length of third negative lens is 0.8f ' ＜ f '5＜ 0.9f '.
Further, above-mentioned first negative lens, the second negative lens, the first positive lens, the second positive lens and third negative lens
Refractive index be respectively：
The refractive index of first negative lens is 1.65 ＜ n1＜ 1.9；
The refractive index of second negative lens is 1.65 ＜ n2＜ 1.75；
The refractive index of first positive lens is 1.75 ＜ n3＜ 1.9；
The refractive index of second positive lens is 1.4 ＜ n4＜ 1.55；
The refractive index of third negative lens is 1.75 ＜ n5＜ 1.9.
Further, above-mentioned the first negative lens, the second negative lens, the first positive lens, the second positive lens and the third stated is born thoroughly
The radius of curvature in two faces is respectively in each lens in mirror：
For the first negative lens：
-210f′1＜ R1＜ -214f '1；-208f′1＜ R2＜ -212f '1；
For the second negative lens：
-1.4f′2＜ R3＜ -1.2f '2；-0.5f′2＜ R4＜ -0.4f '2；
For the first positive lens：
0.9f′3＜ R5＜ 1.1f '3；-3.8f′3＜ R6＜ -4f '3；
For the second positive lens：
-0.9f′4＜ R7＜-f '4；-0.25f′4＜ R8＜ -0.35f '4；
For third negative lens：
0.04f′5＜ R9＜ 0.06f '5；0.06f′5＜ R10＜ 0.08f '5
Wherein, R1、R3、R5、R7、R9For the plane of incidence of light；R2、R4、R6、R8、R10It is the exit facet of light.
Further, above-mentioned scanning reflection mirror shady face is shading surface.
Further, the above-mentioned instantaneous field of view for stating the low veiling glare round-the-clock star tracker optical texture of wide cut is less than 2 °, can
It observes the region between 40 °~70 ° spatial domains of zenith, using the wide spectrum of 800nm~1700nm, avoids sky background radiation
Strongest spectral coverage is conducive to improve daylight observation fixed star ability.In addition, scanning optical path is not weighed with imaging optical path in the present invention
It is folded, veiling glare inhibition can be more effectively carried out to imaging optical path.
Further, above-mentioned first negative lens, the first positive lens, third negative lens material be H-ZF52A；Second is negative
The material of lens is H-ZF6, and the material of the second positive lens is H-ZK3, is arranged in pairs or groups optical system by the abbe number of three kinds of glass
The chromatic aberration correction of system is within ± 2 μm.
The present invention has the following advantages：
1, the present invention detaches scanning optical path and imaging optical path, is designed to standalone module.It can at scanning reflection mirror backlight
To block sky background radiation, while setting the first negative lens to aperture diaphragm so that system thang-kng opening size is small, favorably
Inhibit in the veiling glare of system.
2, present system instantaneous field of view is less than 2 °, and the area between 40 °~70 ° spatial domains of zenith is realized using scanning reflection mirror
The observation in domain effectively increases the detectable region of star sensor.
3, the present invention chooses the imaging of 800nm~1700nm wide spectrums, avoids the strongest spectral coverage of solar radiation energy, favorably
Fixed star is observed in realization round-the-clock.
4, the present invention is effectively shortened system length, is realized Miniaturization Design using speculum turnover light path.
5, focal length of the present invention is longer, can reduce the relative intensity of sky background radiation, improves fixed star detectivity.
6, four micro objectives (i.e. the second negative lens, the first positive lens, the second positive lens and third negative lenses after the present invention
It takes the focal power of " negative, positive, positive and negative " to distribute, is conducive to the correction of the curvature of field.
7,80% energy of full filed concentrates in 36 μm in 800nm~1700nm of the present invention, the close circle of disperse shape of spot,
Energy distribution is Gaussian Profile, and barycenter deviation is smaller, is advantageously implemented high-precision navigator fix.
8, the present invention uses only three kinds of glass, respectively the first negative lens, the first positive lens, third negative lens material
It is H-ZF52A, the material of the second negative lens is H-ZF6, and the material of the second positive lens is H-ZK3, passes through the color of three kinds of glass
Coefficient collocation is dissipated by the chromatic aberration correction of optical system within ± 2 μm.
9, the present invention is fine to environmental adaptability, and system image quality can be kept in -40 DEG C~80 DEG C.
10, optical system provided by the invention in full filed without vignetting.
Description of the drawings
Fig. 1 is the optical texture schematic diagram of the present invention.
Fig. 2 is the optical system point range figure of the present invention.
Fig. 3 is the optical system optimum image plane difference visual field disc of confusion energy distribution curve figure of the present invention.
Fig. 4 is the optical system optimum image plane distortion grid figure of the present invention.
Fig. 5 is the ratio chromatism, curve of the present invention.
Specific implementation mode
Referring to Fig. 1, the present invention is a kind of optical system for the tracing navigation system that can carry out round-the-clock observation fixed star, should
System includes scanning reflection mirror 1, band pass filter 2, the first negative lens 3, plane mirror 4, principal reflection mirror 5, the second negative lens
6, the first positive lens 7, the second positive lens 8 and third negative lens 9, wherein the first negative lens 3 is diaphragm, 4 center of plane mirror
For through-hole, 5 mirror type of principal reflection mirror is recessed secondary aspherical；
Incident light is reflected after passing sequentially through scanning reflection mirror 1, band pass filter 2, the first negative lens 3 by plane mirror 4
To principal reflection mirror 5, the light path of the secondary reflection again of principal reflection mirror 5 passes sequentially through the through-hole of plane mirror 4, the second negative lens 6, first
It is emitted to external imaging unit 10 after positive lens 7, the second positive lens 8 and third negative lens 9；Wherein, incident light is passed through with incident light
The angle between light path after plane mirror transmitting is 30 ± 5 °.
The instantaneous field of view of the optical system is 2 °, and scanning reflection mirror visual field is 40 °~70 °.
The present invention has chosen 800nm~1700nm wide spectrums that stellar radiation energy is more than solar radiation energy, realizes
Round-the-clock observes fixed star.
For the present invention only with three kinds of glass, wherein high-index material is more so that and refraction face curvature reduces, so as to
Off-axis aberration is reduced, keeps image planes in entire visual field scope more smooth, each visual field disperse is more uniform.In addition, by using difference
The glass pairing use of abbe number can be with correcting chromatic aberration.
The present invention in order to avoid cemented surface fall off or colloidality can change influence system imaging quality, and be not used glue
Conjunction face, meanwhile, in order to obtain big clear aperature, using design scheme of the full filed without vignetting.
In order to obtain good image quality, the present invention takes following parameter configuration：
For the first negative lens 3,
- 164f ' ＜ f '11.65 ＜ n of ＜ -162f '1＜ 1.9
-210f′1＜ R1＜ -214f '1 -208f′1＜ R2＜ -212f '1
For plane mirror 4：
Centre is through-hole, and through-hole diameter is plane mirror diameter
For principal reflection mirror 5：
1000~1250mm of surface vertices radius；
For the second negative lens 6,
1.65 ＜ n2＜ 1.75 0.1f ' ＜ f '2＜ 0.3f '
-1.4f′2＜ R3＜ -1.2f '2-0.5f′2＜ R4＜ -0.4f '2
For the first positive lens 7,
1.75 ＜ n31.9-0.3f ' ＜ f ' of ＜3＜ -0.1f '
0.9f′3＜ R5＜ 1.1f '3 -3.8f′3＜ R6＜ -4f '3
For the second positive lens 8,
1.4 ＜ n41.55-0.3f ' ＜ f ' of ＜4＜ -0.1f '
-0.9f′4＜ R7＜-f '4 -0.25f′4＜ R8＜ -0.35f '4
For third negative lens 9,
1.75 ＜ n5＜ 1.9 0.8f ' ＜ f '5＜ 0.9f '
0.04f′5＜ R9＜ 0.06f '5 0.06f′5＜ R10＜ 0.08f '5
In above-mentioned parameter, R1、R2、R3、R4、R5、R6、R7、R8、R9、R10Respectively the first negative lens 3, the second negative lens 6,
The radius of curvature in one positive lens 7, the second positive lens 8 and third negative lens 9 totally ten faces, n1、n2、n3、n4、n5Respectively first is negative
The refractive index of lens 3, the second negative lens 6, the first positive lens 7, the second positive lens 8 and third negative lens 9, f '1、f′2、f′3、f
′4、f′5The coke of respectively the first negative lens 3, the second negative lens 6, the first positive lens 7, the second positive lens 8 and third negative lens 9
Away from f '1、f′2、f′3、f′4、f′5Respectively the first negative lens 3, the second negative lens 6, the first positive lens 7, the second positive lens 8 and
The focal length of three negative lenses 9, f ' are the whole focal length of optical system.
Optical system focal length provided by the invention is 623mm, effectively enters Pupil diameters 70mm.Referring to Fig. 2,800nm~
The close circle of full filed disperse shape of spot, good imaging quality, deviation of mass center very little in 1700nm；Referring to Fig. 3, disc of confusion
Energy is higher than 80% in 30 μm, meets 2 × 2 detector pixels of covering, and have high-energy concentration degree；Referring to Fig. 4, system
Distortion is less than 5 μm in full filed, and picture point deviation is small, is conducive to the star image processing in later stage；Referring to Fig. 5, white light is relative to master
The ratio chromatism, that 1.1 μm of coloured light has effectively achieved the achromatism in the full spectral coverages of 800nm~1700nm within ± 2 μm.
Claims (8)
1. a kind of low veiling glare round-the-clock star tracker optical texture of wide cut, it is characterised in that：Including scanning reflection mirror (1), band logical
Filter plate (2), the first negative lens (3), plane mirror (4), principal reflection mirror (5), the second negative lens (6), the first positive lens
(7), the second positive lens (8) and third negative lens (9)；
First negative lens is aperture diaphragm, and the surface of emission of principal reflection mirror is the secondary aspherical of concave, and plane mirror center is opened
Equipped with through-hole；
Incident light passes sequentially through after scanning reflection mirror (1), band pass filter (2), the first negative lens (3) by plane mirror (4)
Reflex to principal reflection mirror (5), the light path of principal reflection mirror (5) secondary reflection again passes sequentially through the through-hole of plane mirror (4), second negative
It is emitted to external imaging unit (10) after lens (6), the first positive lens (7), the second positive lens (8) and third negative lens (9).
2. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 1, it is characterised in that：Described first
Negative lens, the second negative lens, the first positive lens, the second positive lens and third negative lens focal length be respectively：
The focal length of first negative lens is -164f ' ＜ f '1＜ -162f '；
The focal length of second negative lens is 0.1f ' ＜ f '2＜ 0.3f '；
The focal length of first positive lens is -0.3f ' ＜ f '3＜ -0.1f '；
The focal length of second positive lens is -0.3f ' ＜ f '4＜ -0.1f '；
The focal length of third negative lens is 0.8f ' ＜ f '5＜ 0.9f '.
3. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 2, it is characterised in that：Described first
Negative lens, the second negative lens, the first positive lens, the second positive lens and third negative lens refractive index be respectively：
The refractive index of first negative lens is 1.65 ＜ n1＜ 1.9；
The refractive index of second negative lens is 1.65 ＜ n2＜ 1.75；
The refractive index of first positive lens is 1.75 ＜ n3＜ 1.9；
The refractive index of second positive lens is 1.4 ＜ n4＜ 1.55；
The refractive index of third negative lens is 1.75 ＜ n5＜ 1.9.
4. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 3, it is characterised in that：Described first
The curvature in two faces of each lens in negative lens, the second negative lens, the first positive lens, the second positive lens and third negative lens
Radius is respectively：
For the first negative lens：
-210f′1＜ R1＜ -214f '1；-208f′1＜ R2＜ -212f '1；
For the second negative lens：
-1.4f′2＜ R3＜ -1.2f '2；-0.5f′2＜ R4＜ -0.4f '2；
For the first positive lens：
0.9f′3＜ R5＜ 1.1f '3；-3.8f′3＜ R6＜ -4f '3；
For the second positive lens：
-0.9f′4＜ R7＜-f '4；-0.25f′4＜ R8＜ -0.35f '4；
For third negative lens：
0.04f′5＜ R9＜ 0.06f '5；0.06f′5＜ R10＜ 0.08f '5
Wherein, R1、R3、R5、R7、R9For the plane of incidence of light；R2、R4、R6、R8、R10It is the exit facet of light.
5. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 4, it is characterised in that：The master is anti-
Penetrate 1000~1250mm of surface vertices radius of mirror.
6. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 5, it is characterised in that：Scanning reflection
Mirror shady face is shading surface.
7. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 6, it is characterised in that：The wide cut
The instantaneous field of view of low veiling glare round-the-clock star tracker optical texture is considerable using the wide spectrum of 800nm~1700nm less than 2 °
Measure the region between 40 °~70 ° spatial domains of zenith.
8. the low veiling glare round-the-clock star tracker optical texture of wide cut according to claim 7, it is characterised in that：Described first
Negative lens, the first positive lens, third negative lens material be H-ZF52A；The material of second negative lens is H-ZF6, and second just
The material of lens is H-ZK3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810296546.4A CN108345095A (en) | 2018-03-30 | 2018-03-30 | A kind of low veiling glare round-the-clock star tracker optical texture of wide cut |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810296546.4A CN108345095A (en) | 2018-03-30 | 2018-03-30 | A kind of low veiling glare round-the-clock star tracker optical texture of wide cut |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343208A (en) * | 2018-10-11 | 2019-02-15 | 佛山科学技术学院 | A kind of starlight refraction optical system of star sensor |
| CN113552716A (en) * | 2021-06-24 | 2021-10-26 | 中国科学院西安光学精密机械研究所 | Front scanning mirror system for measuring high-rise atmospheric wind field of foundation |
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| CN103439792A (en) * | 2013-08-30 | 2013-12-11 | 中国科学院西安光学精密机械研究所 | Whole-day miniaturized fixed star tracking optical system |
| US20150241677A1 (en) * | 2012-09-28 | 2015-08-27 | Cgs Spa Compagnia Generale Per Lo Spazio | Telescope, comprising a spherical primary mirror, with wide field of view and high optical resolution |
| CN106125280A (en) * | 2016-08-19 | 2016-11-16 | 四川九洲电器集团有限责任公司 | Zigzag type optical system for field stitching |
| CN208013534U (en) * | 2018-03-30 | 2018-10-26 | 中国科学院西安光学精密机械研究所 | A kind of low veiling glare round-the-clock star tracker optical texture of wide cut |
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| CN102393559A (en) * | 2011-12-07 | 2012-03-28 | 四川九洲电器集团有限责任公司 | Athermal catadioptric homocentric optical system |
| US20150241677A1 (en) * | 2012-09-28 | 2015-08-27 | Cgs Spa Compagnia Generale Per Lo Spazio | Telescope, comprising a spherical primary mirror, with wide field of view and high optical resolution |
| CN103439792A (en) * | 2013-08-30 | 2013-12-11 | 中国科学院西安光学精密机械研究所 | Whole-day miniaturized fixed star tracking optical system |
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| CN208013534U (en) * | 2018-03-30 | 2018-10-26 | 中国科学院西安光学精密机械研究所 | A kind of low veiling glare round-the-clock star tracker optical texture of wide cut |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109343208A (en) * | 2018-10-11 | 2019-02-15 | 佛山科学技术学院 | A kind of starlight refraction optical system of star sensor |
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| CN113552716A (en) * | 2021-06-24 | 2021-10-26 | 中国科学院西安光学精密机械研究所 | Front scanning mirror system for measuring high-rise atmospheric wind field of foundation |
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