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Proceedings Paper

A precision lens mount for large temperature excursions
Author(s): Stephen A. Smee
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Paper Abstract

Details of a novel lens mount are described. The design makes use of existing concepts in design and manufacturing to produce an elegant method for establishing and maintaining accurate lens placement over a broad range of temperature. Here lenses are centered by multiple roll-pin shaped flexures precisely machined into the mount. Like other flexure mounts, the roll-pin flexures provide radial compliance to accommodate the difference in radial expansion between the lens and mount. However, the cylindrical flexure geometry is easily multiplexed and allows reference features for axial placement, centration in a barrel, and mount-to-mount stacking to be more readily integrated in a single monolithic lens cell. This eases manufacture and improves accuracy. In this paper, the concept, analysis, and design details for the roll-pin flexure mount are presented, along with examples of their use with a variety of lens materials, diameters (25 mm to 375 mm), and temperatures ranges (ambient to cryogenic).

Paper Details

Date Published: 26 July 2010
PDF: 13 pages
Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77393O (26 July 2010); doi: 10.1117/12.858038
Show Author Affiliations
Stephen A. Smee, The Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 7739:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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