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Proceedings Paper

The correct lens mount lightweighting design and thermal stress OPD analysis in Cassegrain telescope
Author(s): Ming-Ying Hsu; Chia-Yen Chan; Wei-Cheng Lin; Shenq-Tsong Chang; Ting-Ming Huang
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Paper Abstract

This study is trying to evaluate different lens barrel material, caused lens stress OPD (Optical Path Different) in different temperature condition. The Cassegrain telescope's correct lens assembly are including as correct lens, lens mount, spacer, mount barrel and retainer. The lens barrel initial design is made by invar, but system mass limit is need to lightweighting to meet requirement. Therefore, the lens barrel material is tried to replace to lower density material, such as aluminum and titanium alloy. Meanwhile, the aluminum or titanium alloy material properties CTE (Coefficient of Thermal Expansion) are larger then invar. Thus, the high CTE material will introduce larger thermal stress into the optical system in different temperature condition. This article is analysis the correct lens assembly thermal stress and optical performance in different lens mount material. From above conditions, using FEM (Finite Element Method) and optical software, simulation and optimization the lens mount to achieve system mass requirement.

Paper Details

Date Published: 18 September 2013
PDF: 10 pages
Proc. SPIE 8836, Optomechanical Engineering 2013, 883602 (18 September 2013); doi: 10.1117/12.2022712
Show Author Affiliations
Ming-Ying Hsu, Instrument Technology Research Ctr. (Taiwan)
Chia-Yen Chan, Instrument Technology Research Ctr. (Taiwan)
Wei-Cheng Lin, Instrument Technology Research Ctr. (Taiwan)
Shenq-Tsong Chang, Instrument Technology Research Ctr. (Taiwan)
Ting-Ming Huang, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 8836:
Optomechanical Engineering 2013
Alson E. Hatheway, Editor(s)

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