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Optical system of a micro-nano high-precision star sensor based on combined stray light suppression technology
- Source :
- Applied Optics. 60:697
- Publication Year :
- 2021
- Publisher :
- Optica Publishing Group, 2021.
-
Abstract
- The micro-nano design of a high-precision star sensor is studied. Point source transmittance (PST, the ratio of the irradiance generated by the external field source on the image surface to the irradiance at the entrance pupil) is used as the evaluation index of stray light suppression ability, the stray light suppression theory of star sensors is analyzed, and the mathematical model between stray light suppression ability and detectable magnitude is established. In view of the limited volume of micro-nano star sensors, a new design principle of combined anti-stray-light design of the baffle and optical system is proposed. The high stray light suppression of the micro-nano star sensor is realized by using the imaging optical path design of active stray light suppression and the design of a conical extinction cavity, which breaks through the technical problem of coupling system volume and stray light suppression ability. The results of the simulation and on-orbit experiments show that the star sensor based on the joint stray light technology can achieve a PST of 2 × 10 − 8 at the avoidance angle under the premise of limited optical system volume, and it has a stray light suppression ability of 6.5 magnitude stars.
- Subjects :
- Physics
Computer simulation
Point source
Stray light
business.industry
Astrophysics::Instrumentation and Methods for Astrophysics
Conical surface
01 natural sciences
Atomic and Molecular Physics, and Optics
010309 optics
Entrance pupil
Optical path
Optics
Extinction (optical mineralogy)
0103 physical sciences
Transmittance
Physics::Atomic Physics
Electrical and Electronic Engineering
business
Engineering (miscellaneous)
Subjects
Details
- ISSN :
- 21553165 and 1559128X
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Applied Optics
- Accession number :
- edsair.doi.dedup.....6be652b19a052b62667a316c5eccad04