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Proceedings Paper

Thermal optical path difference analysis of off-axis lens ray trace footprint at Cassegrain telescope correct lens assembly
Author(s): Ming-Ying Hsu; Yu-Chuan Lin; Chia-Yen Chan; Wei-Cheng Lin; Shenq-Tsong Chan; Ting-Ming Huang
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Paper Abstract

The Cassegrain telescope system in this study, is discussion correct lens thermal OPD (Optical Path Difference) effect optical performance. The correct lens assembly are includes several components such as correct lens, lens mount, spacer, mount barrel and retainer. The heat transfer from surrounding to the correct lens barrel will causes optical system aberration. Meanwhile, the off-axis rays path of the OPD must consider lens incidence point and emergence point. The correct lens temperature distribution is calculate the lens barrel heat transfer analysis, the thermal distortion and stress are solve by FEM (Finite Element Method) software. The temperature calculation results can be weighting to each incidence ray path and calculate thermal OPD. The thermal OPD on Z-direction can be fitted by rigid body motion and Zernike polynomial. The fitting results can be used to evaluate the thermal effect on correct lens assembly in telescope system.

Paper Details

Date Published: 11 October 2012
PDF: 8 pages
Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 848604 (11 October 2012); doi: 10.1117/12.928833
Show Author Affiliations
Ming-Ying Hsu, Instrument Technology Research Ctr. (Taiwan)
Yu-Chuan Lin, Instrument Technology Research Ctr. (Taiwan)
Chia-Yen Chan, Instrument Technology Research Ctr. (Taiwan)
Wei-Cheng Lin, Instrument Technology Research Ctr. (Taiwan)
Shenq-Tsong Chan, Instrument Technology Research Ctr. (Taiwan)
Ting-Ming Huang, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 8486:
Current Developments in Lens Design and Optical Engineering XIII
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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