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Proceedings Paper

Design of high-resolution variable size spatial filter for Gemini Planet Imager using flexure elements
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Paper Abstract

This paper presents a design of a variable size spatial filter used in the wavefront sensor subsystem of the Gemini Planet Imager instrument. It describes an adjustable mechanism consisting of two slides forming a square aperture which can be varied in size between 1.8 and 6.7 mm. These slides are located on athermalized flexure mounts that move opposite to one another driven by a single precision linear actuator. The device retains long term dimensional stability, resolution, and repeatability on a micron level for all gravity vector orientations and for temperatures between -5°C and + 25°C.

Paper Details

Date Published: 23 July 2008
PDF: 10 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701856 (23 July 2008); doi: 10.1117/12.789515
Show Author Affiliations
Vlad Reshetov, Herzberg Institute of Astrophysics, National Research Council Canada (Canada)
Joeleff Fitzsimmons, Herzberg Institute of Astrophysics, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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