Research on key technologies of inverted 3-FOV Schmidt telescope

LAI Xinhua; LI Jinpeng; PENG Runfu; YANG Yongxing; WANG Xinrui; SHI Wangzhou

doi:10.5768/JAO202344.0601001

Journal of Applied Optics > 2023 > 44(6): 1286-1293. > DOI: 10.5768/JAO202344.0601001

LAI Xinhua, LI Jinpeng, PENG Runfu, YANG Yongxing, WANG Xinrui, SHI Wangzhou. Research on key technologies of inverted 3-FOV Schmidt telescope[J]. Journal of Applied Optics, 2023, 44(6): 1286-1293. DOI: 10.5768/JAO202344.0601001

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Research on key technologies of inverted 3-FOV Schmidt telescope

LAI Xinhua^{1, 2, 3,},
LI Jinpeng^{3, 4, ,},
PENG Runfu^{1, 2, 3},
YANG Yongxing^{3, 4},
WANG Xinrui⁴,
SHI Wangzhou^2, ,

1.
Shanghai Key Lab for Astrophysics, Shanghai 200234,China
2.
Mathematics and Science College of Shanghai Normal University, Shanghai 200234
3.
CAS Nanjing Astronomical Instruments Co., Ltd., Nanjing 210042, China
4.
Nanjing Research Center of Astronomical Instruments, University of Science and Technology of China, Nanjing 210042, China

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Received Date: December 11, 2022
Revised Date: February 02, 2023
Available Online: August 23, 2023

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Abstract

Abstract

An inverted 3-FOV(field of view) Schmidt telescope based on 3-facet mirror was developed, and its key technical problems were studied. Based on the geometric symmetry of regular triangular pyramid, the relationship between the visual axis angle of 3 FOVs and the angle of facet mirror was derived, and a 3-facet mirror was designed to realize the multi-field observation function. The influence of the gravity deformation of primary mirror of inverted Schmidt telescope on the image quality was analyzed by finite element method. The influence of the key parameters of testing optical path on the processing error of Schmidt corrector was expounded. The stray light of optical system was studied by Monte Carlo method. Finally,the whole optical system was tested experimentally, and a 3-facet mirror was actually developed. Results show that the included angle between the mirrors is 133.08°, which can observe 3 FOVs perpendicular to each other at the same time. The test result of the telescope optical system is PV=0.614 λ , RMS=0.105 λ (λ=632.8 nm). The system can be used to measure the earth attitude in space, which expands the application of Schmidt telescope.
- Schmidt telescope,
- 3-facet mirror,
- gravitational deformation,
- Schmidt corrector

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References (20)

References

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Research on key technologies of inverted 3-FOV Schmidt telescope