New method for determining the transmitted wavefront error of interference filters

Details New method for determining the transmitted wavefront error of interference filters New method for determining the transmitted wavefront error of interference filters

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4008..896b&link_type=abstract

Proc. SPIE Vol. 4008, p. 896-898, Optical and IR Telescope Instrumentation and Detectors, Masanori Iye; Alan F. Moorwood; Eds.

Physics

Instrumentation and Detectors

Scientific paper

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.

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