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Proceedings Paper

New method for determining the transmitted wavefront error of interference filters
Author(s): Gregory A. Barrick; Todd Szarlan
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Paper Abstract

To assist in determining and tracking the transmitted wavefront error of the Canada-France-Hawaii Telescope filter stock, a method for determining the wavefront error, in transmission, of the filters using a white-light source has been investigated. The method uses the ef software from Laplacian Optics which determines a wavefront based on curvature sensing. The filter is placed in a collimated white-light beam. After the filter, the beam is imaged onto a small CCD which is placed on a translation stage. The CCD is moved to either side of focus to produce the two out-of- focus images required for curvature sensing. The results of this investigation compared to results using a n interferometer will be presented.

Paper Details

Date Published: 16 August 2000
PDF: 3 pages
Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395408
Show Author Affiliations
Gregory A. Barrick, Canada-France-Hawaii Telescope Corp. (United States)
Todd Szarlan, Canada-France-Hawaii Telescope Corp. (United States)


Published in SPIE Proceedings Vol. 4008:
Optical and IR Telescope Instrumentation and Detectors
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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