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Proceedings Paper

Optimization of the modified Sagnac imaging interferometer for full compensation
Author(s): Yuanhe Tang; Guangde Chen; Chunmin Zhang; Yunlong Lin; Hanchen Liu; Kai Liu
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Paper Abstract

The modified super-wide-angle Sagnac interferometer (SASI) is designed for upper atmospheric wind measurement. The formula of SASI's optical path difference (OPD) is derived, in which the OPD versus the sine series of incidence angle in order of 4. The SASI's fully compensations of super-wide-angle, achromatic, thermal, wavelength-independent thermal conditions have been investigated. The SASI configuration for the above compensations was successfully setup by selecting correct glasses from the 113 kinds of glasses. The optimized SASI is made of ZBaF17 and QF14 glasses, and the arm lengths are accurately configured. Based on the configuration of glass types and arm lengths of SASI, it shows that SASI achromatic condition is satisfied synchronously for three aurora's emission lines, which are 557.7nm, 630.0nm and 732.0nm respectively. The relative error of SASI's lengths does not exceed 1%. The full field of view (FOV) of the SASI is 6°. It is about 5° in full angle from SASI optical axis to CCD farthest corner. The first order fringe occupies about 67% of the CCD area.

Paper Details

Date Published: 11 January 2007
PDF: 6 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62791G (11 January 2007); doi: 10.1117/12.725182
Show Author Affiliations
Yuanhe Tang, Xi'an Jiaotong Univ. (China)
Xi'an Univ. of Technology (China)
Guangde Chen, Xi'an Jiaotong Univ. (China)
Chunmin Zhang, Xi'an Jiaotong Univ. (China)
Yunlong Lin, York Univ. (Canada)
Hanchen Liu, Xi'an Polytechnic Univ. (China)
Kai Liu, Xi'an Univ. of Technology (China)

Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

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