CN106383427A - Space filtering based light shield of star sensor - Google Patents
Space filtering based light shield of star sensor Download PDFInfo
- Publication number
- CN106383427A CN106383427A CN201610790448.7A CN201610790448A CN106383427A CN 106383427 A CN106383427 A CN 106383427A CN 201610790448 A CN201610790448 A CN 201610790448A CN 106383427 A CN106383427 A CN 106383427A
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- Prior art keywords
- light
- gear ring
- light shield
- star sensor
- baffle vane
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention discloses a space filtering based light shield of a star sensor. The light shield comprises a cover casing and first to sixth shading rings, and the first to sixth shading rings are arranged from an entrance pupil position to the exit pupil position sequentially and mounted in the cover casing; the first shading ring and the sixth shading ring are arranged at the two ends of the cover casing opposite to each other, and a connecting line between cutting edges of the first shading ring and the sixth shading ring and a center line of the cover casing form an included angle of 16 degree; and the middle portions of the fourth, fifth and sixth shading rings are provided with optical filters in a rotational installation manner respectively. The light shield has the advantages that the cover casing, the shading rings and the optical filters form an optical-mechanical assembly of the light shield, and it is ensured that the star sensor can output effective attitude data when a sun shielding angle is greater than 20 degree; a non-imaging spectrum of the sun shielding angle greater than 20 degree can reach the entrance pupil position of an optical system via at least twice absorptive scattering; and the light shield has a high light shielding performance, and is capable of spectrum filtering.
Description
Technical field
The present invention relates to aerospace class starry sky Detection Techniques field is and in particular to a kind of star sensor based on space filtering hides
Light shield, is capable of star sensor and eliminates interference of stray light at not less than 20 ° of sun protection angles.
Background technology
Veiling glare suppression technology is one of key technology of star sensor, and light shield is then to carry out most effective suppression to veiling glare
The measure of system, it can be to the veiling glare from compositions such as sunshine, gas light, moonlight, background ambient light in a certain design protection
Effectively suppressed in angular region.
The mentality of designing of the optical texture based on space filtering light shield is：1st, it is based on space filtering mechanism, it is to avoid non-work
Incide in star sensor image device as spectrum；2nd, the miscellaneous scattered light inciding at star sensor optical lens entrance pupil is made to pass through
Scattering above at least twice, its objective is incident miscellaneous scattered energy is decayed to greatest extent；3rd, to light shield
Housing carries out chemical etching granulation agent surface treatment, strengthens surface diffusing reflection；4th, shading over body case scattering surface have MIN
Reflectivity；5th, multi-stage protection is carried out to the delustred coating of light shield, prevent from leading to film due to factors such as mechanical environment, space environments
Layer comes off, and leads to anti-miscellaneous scattering power decay by this reason.
Meet conditions above and optical texture design is carried out to star sensor light shield and baffle vane, can be real from optical angle
The now maximum attenuation to miscellaneous scattered light, at present, industry is also not equipped with the star sensor light shield of above-mentioned technical characterstic, therefore needs
Want Related product, realize the interference that star sensor eliminates miscellaneous scattered light at sun protection angle.
Content of the invention
It is an object of the invention to provide a kind of star sensor light shield based on space filtering, using by case, be in the light
Ring, optical filter constitute light shield optomechanical components it is ensured that star sensor can export effective appearance after more than 20 ° of sun protection angles
State data；It is capable of reaching optical system more than the non-imaged spectrum at 20 ° of sun protection angles at least through absorbing scattering twice
At entrance pupil；It is capable of high extinction energy；It is capable of spectral filtering function.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of star sensor light shield based on space filtering is it is ensured that star sensor energy after more than 20 ° of sun protection angles
Export effective attitude data, it is characterized in that, comprise：
Case；
First baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light,
From at light shield entrance pupil, at emergent pupil, order arranges and is arranged in case；
Described first baffle vane and the sixth gear ring of light are oppositely arranged on case two ends, the first baffle vane and the sixth gear ring of light
Cutting edge line becomes 16 ° of angles with case center line；
Respectively filter is provided with rotary installation method in the middle of the described fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light
Mating plate, for saturating visible ray, filter near-infrared.
The above-mentioned star sensor light shield based on space filtering, wherein：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light, the sixth gear ring of light
Inner surface equal electroplating black delustring paint；
Case outer surface adopts yellow electric conductive oxidation to process, plating inner surface black matt paint.
The above-mentioned star sensor light shield based on space filtering, wherein：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and sixth gear
The cutting edge of the ring of light all adopts precise machining process, and cutting edge THICKNESS CONTROL is in 0.01mm.
The above-mentioned star sensor light shield based on space filtering, wherein：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light, sixth gear light
The overall structure of ring and case is all processed using chemical etching granulation agent.
The above-mentioned star sensor light shield based on space filtering, wherein：
Optical filter flatness in the described fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light is better than 1/20 λ, thickness
>=2mm, refractive index≤1.7, inoperative spectral coverage reflectivity is better than 99.9%, and operating spectrum band transmitance is better than 99.9%.
The above-mentioned star sensor light shield based on space filtering, wherein：
Described light shield sun protection angle >=20 °, background ambient light shielding angle >=16 °, the angle of visual field≤± 8 ° of light shield,
Lens Entrance Pupil≤40mm.
The above-mentioned star sensor light shield based on space filtering, wherein：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and sixth gear
It is respectively equipped with screwed hole on the ring of light, and be anchored on case by screw；Six baffle vanes thicken at screwed hole, other positions
Loss of weight is processed.
The above-mentioned star sensor light shield based on space filtering, wherein：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and sixth gear
The shape of the ring of light is all in horn-like.
The present invention compared with prior art has advantages below：Constitute shading Lacquer finish using by case, baffle vane, optical filter
Learn mechanical component it is ensured that star sensor can export effective attitude data after more than 20 ° of sun protection angles；It is capable of being more than
The non-imaged spectrum at 20 ° of sun protection angles reaches at optical system entrance pupil at least through absorbing scattering twice；By spectrum modulation
Optical filter, may filter that non-imaged spectra1 interfer-, realizes spectral filtering, other spectral coverage light disturbances of greatly decaying, and effectively carries
High anti-spuious optical property, therefore possesses high extinction energy, and can achieve spectral filtering function.
Brief description
Fig. 1 is the outline drawing of the present invention；
Fig. 2 is the sectional view of the present invention；
Fig. 3 is the first baffle vane outline drawing in the present invention；
Fig. 4 is the second baffle vane outline drawing in the present invention；
Fig. 5 is third gear ring of light outline drawing in the present invention；
Fig. 6 is fourth gear ring of light outline drawing and supporting optical filter in the present invention；
Fig. 7 is fifth gear ring of light outline drawing and supporting optical filter in the present invention；
Fig. 8 is sixth gear ring of light outline drawing and supporting optical filter in the present invention；
The extinction analysis figure of present invention when Fig. 9, Figure 10 become 18 ° for sun light beam with star sensor；
The extinction analysis figure of present invention when Figure 11, Figure 12 become 20 ° for sun light beam with star sensor；
The extinction analysis figure of present invention when Figure 13, Figure 14 become 25 ° for sun light beam with star sensor；
The extinction analysis figure of present invention when Figure 15, Figure 16 become 30 ° for sun light beam with star sensor；
The extinction analysis figure of present invention when Figure 17, Figure 18 become 35 ° for sun light beam with star sensor；
The extinction analysis figure of present invention when Figure 19, Figure 20 become 40 ° for sun light beam with star sensor.
Specific embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in Fig. 1～8, it is star sensor shading cover structure figure, be that sun protection angle is not little according to veiling glare shielding angle
In 20 °, background ambient light shielding angle is not less than 16 °, and the angle of visual field of light shield is not less than ± 8 °, and Lens Entrance Pupil is not less than 40mm's
Require, six loss of weight baffle vanes of design are placed in case 7, and at emergent pupil, order is arranged in first and is in the light from light shield entrance pupil
Ring 1, the second baffle vane 2, the third gear ring of light 3, the fourth gear ring of light 4, the fifth gear ring of light 5, the sixth gear ring of light 6.
First baffle vane 1, the second baffle vane 2, the third gear ring of light 3, the fourth gear ring of light 4, the fifth gear ring of light, the sixth gear ring of light
6 shape flares；First baffle vane 1, the sixth gear ring of light 6 are respectively placed in case 7 two ends.First baffle vane 1 and sixth gear light
Ring 6 cutting edge line and angle formed by case center line (i.e. optical axis) are 16 °.
Required according to space loss of weight, the first baffle vane 1, the second baffle vane 2, the third gear ring of light 3, the fourth gear ring of light the 4, the 5th
Baffle vane 5, the sixth gear ring of light 6 are all anchored on case 7 using screw, and six baffle vanes thicken at screwed hole, other positions
Loss of weight is processed.
Installed with rotary installation method respectively in the middle of the described fourth gear ring of light 4, the fifth gear ring of light 5 and the sixth gear ring of light 6
There is corresponding optical filter 41,51,61, and bore is sequentially reduced, and matches with corresponding baffle vane clear aperture, for thoroughly visible
Light, filter near-infrared, optical filter 41,51,61 is spectrum modulation optical filter, may filter that non-imaged spectra1 interfer-, realizes spectrum filter
Ripple, other spectral coverage light disturbances of greatly decaying, effectively improve and resist spuious optical property, in the present embodiment, an optical filter filter
Weave efficiency is 10-4It is therefore desirable to three optical filter superpositions are acted on using can be only achieved space filtering.
In the present embodiment, the optical filter flatness in the described fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light is excellent
In 1/20 λ, thickness >=2mm, refractive index≤1.7, inoperative spectral coverage reflectivity is better than 99.9%, and operating spectrum band transmitance is better than
99.9%.
First baffle vane 1, the second baffle vane 2, the third gear ring of light 3, the fourth gear ring of light 4, the fifth gear ring of light 5, sixth gear light
Ring 6 is all processed using black matt paint, for absorbing light beam；Case 7 outer surface needs conductive using yellow according to space environment
Oxidation processes, electroplating black delustring paint after the face agent of inner surface sand, to increase the contact area of light beam and figure layer.
It is below the extinction ratio analogous diagram when different sunshines are incident for the star sensor of the present invention, coating adopts domestic nothing
The black nickel of organic coating.
1) when sun light beam becomes 18 ° of angles with light shield,
As shown in figure 9, the luminous flux that light shield incidence end receives；
As shown in Figure 10, the luminous flux that light shield end (the camera lens plane of incidence) receives；
Now, the extinction ratio of light shield is 1.653E-07.
2) when sun light beam becomes 20 ° of angles with light shield,
As shown in figure 11, the luminous flux that light shield incidence end receives；
As shown in figure 12, the luminous flux that light shield end (the camera lens plane of incidence) receives；
Now, the extinction ratio of light shield is 1.112E-07.
3) when sun light beam becomes 25 ° of angles with light shield,
As shown in figure 13, the luminous flux that light shield incidence end receives；
As shown in figure 14, the luminous flux that light shield end (the camera lens plane of incidence) receives；
Now, the extinction ratio of light shield is 7.6678E-08.
4) when sun light beam becomes 30 ° of angles with light shield,
As shown in figure 15, the luminous flux that light shield incidence end receives；
As shown in figure 16, the luminous flux that light shield end (the camera lens plane of incidence) receives；
Now, the extinction ratio of light shield is 6.742E-08.
5) when sun light beam becomes 35 ° of angles with light shield,
As shown in figure 17, the luminous flux that light shield incidence end receives；
As shown in figure 18, the luminous flux that light shield end (the camera lens plane of incidence) receives；
Now, the extinction ratio of light shield is 5.922E-08.
6) when sun light beam becomes 40 ° of angles with light shield,
As shown in figure 19, the luminous flux that light shield incidence end receives；
As shown in figure 20, the luminous flux that light shield end (the camera lens plane of incidence) receives；
Now, the extinction ratio of light shield is 4.58248E-08.
Above emulation number is it was demonstrated that the present invention eliminates the better performances of veiling glare.
To sum up, the light shield of the present invention tests the anti-veiling glare ability of whole machine star sensor, test knot in laboratory environment
Fruit shows to be consistent with design result with effective protection near 20 °.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
Multiple modifications and substitutions all will be apparent from.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of star sensor light shield based on space filtering is it is ensured that star sensor can be defeated after more than 20 ° of sun protection angles
Go out effective attitude data it is characterised in that comprising：
Case；
First baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light, by hiding
At light shield entrance pupil, at emergent pupil, order arranges and is arranged in case；
Described first baffle vane and the sixth gear ring of light are oppositely arranged on case two ends, the cutting edge of the first baffle vane and the sixth gear ring of light
Line becomes 16 ° of angles with case center line；
Respectively optical filtering is provided with rotary installation method in the middle of the described fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light
Piece, for saturating visible ray, filter near-infrared.
2. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light, the sixth gear ring of light interior
Surface equal electroplating black delustring paint；
Case outer surface adopts yellow electric conductive oxidation to process, plating inner surface black matt paint.
3. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light
Cutting edge all adopt precise machining process, cutting edge THICKNESS CONTROL is in 0.01mm.
4. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light, the sixth gear ring of light and
The overall structure of case is all processed using chemical etching granulation agent.
5. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Optical filter flatness in the described fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light be better than 1/20 λ, thickness >=
2mm, refractive index≤1.7, inoperative spectral coverage reflectivity is better than 99.9%, and operating spectrum band transmitance is better than 99.9%.
6. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Described light shield sun protection angle >=20 °, background ambient light shielding angle >=16 °, the angle of visual field≤± 8 ° of light shield, camera lens
Entrance pupil≤40mm.
7. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light
On be respectively equipped with screwed hole, and be anchored on case by screw；Six baffle vanes thicken at screwed hole, other positions loss of weight
Process.
8. the star sensor light shield based on space filtering as claimed in claim 1 it is characterised in that：
Described first baffle vane, the second baffle vane, the third gear ring of light, the fourth gear ring of light, the fifth gear ring of light and the sixth gear ring of light
Shape all in horn-like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610790448.7A CN106383427B (en) | 2016-08-31 | 2016-08-31 | A kind of star sensor hood based on space filtering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610790448.7A CN106383427B (en) | 2016-08-31 | 2016-08-31 | A kind of star sensor hood based on space filtering |
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| Publication Number | Publication Date |
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| CN106383427A true CN106383427A (en) | 2017-02-08 |
| CN106383427B CN106383427B (en) | 2019-05-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073014A (en) * | 2017-12-26 | 2018-05-25 | 中国科学院西安光学精密机械研究所 | Light blocking ring setting method based on stray light suppression angle |
| CN108917795A (en) * | 2018-08-08 | 2018-11-30 | 哈尔滨工业大学 | Veiling glare towards star sensor ground surface test and validation inhibits system |
| CN108983410A (en) * | 2018-06-12 | 2018-12-11 | 中国科学院上海技术物理研究所 | A kind of mechanism of diaphragm for analog sun sensor |
| CN109506644A (en) * | 2018-10-17 | 2019-03-22 | 中国航空工业集团公司洛阳电光设备研究所 | The highly sensitive star sensor of round-the-clock |
| CN110850662A (en) * | 2019-11-01 | 2020-02-28 | 上海航天控制技术研究所 | Multi-degree-of-freedom optical search system |
| CN111929967A (en) * | 2020-08-12 | 2020-11-13 | 中国科学院光电技术研究所 | Light shield system with high stray light rejection ratio and design method thereof |
| CN112666704A (en) * | 2020-12-29 | 2021-04-16 | 中国科学院长春光学精密机械与物理研究所 | Structural design method of one-time stray light shading cover in optical system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073014A (en) * | 2017-12-26 | 2018-05-25 | 中国科学院西安光学精密机械研究所 | Light blocking ring setting method based on stray light suppression angle |
| CN108073014B (en) * | 2017-12-26 | 2019-11-15 | 中国科学院西安光学精密机械研究所 | Light blocking ring setting method based on stray light suppression angle |
| CN108983410A (en) * | 2018-06-12 | 2018-12-11 | 中国科学院上海技术物理研究所 | A kind of mechanism of diaphragm for analog sun sensor |
| CN108917795A (en) * | 2018-08-08 | 2018-11-30 | 哈尔滨工业大学 | Veiling glare towards star sensor ground surface test and validation inhibits system |
| CN108917795B (en) * | 2018-08-08 | 2021-05-07 | 哈尔滨工业大学 | Stray light suppression system for ground test and verification of star sensor |
| CN109506644A (en) * | 2018-10-17 | 2019-03-22 | 中国航空工业集团公司洛阳电光设备研究所 | The highly sensitive star sensor of round-the-clock |
| CN109506644B (en) * | 2018-10-17 | 2022-09-02 | 中国航空工业集团公司洛阳电光设备研究所 | All-time high-sensitivity star sensor |
| CN110850662A (en) * | 2019-11-01 | 2020-02-28 | 上海航天控制技术研究所 | Multi-degree-of-freedom optical search system |
| CN111929967A (en) * | 2020-08-12 | 2020-11-13 | 中国科学院光电技术研究所 | Light shield system with high stray light rejection ratio and design method thereof |
| CN112666704A (en) * | 2020-12-29 | 2021-04-16 | 中国科学院长春光学精密机械与物理研究所 | Structural design method of one-time stray light shading cover in optical system |
| CN112666704B (en) * | 2020-12-29 | 2022-05-13 | 中国科学院长春光学精密机械与物理研究所 | Structural design method of first-elimination stray light hood in optical system |
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