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Proceedings Paper

Comparison Of Square Screen Results Analyzed By Two Different Methods
Author(s): I. Ghozell
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Paper Abstract

A. square-array of holes forming a sampling screen is used to test the 3.2 m paraboloid primary for the Infrared. Telescope Facility that is to be installed at Mauna Kea on the island of Hawaii. A point source is used to illuminate the mirror through the screen, and the reflected light is recorded on a photographic plate. The data obtained. from measuring the spot locations on the plate are reduced to obtain surface departures from a desired surface. The data reduction is performed with the use of two different computer programs, one which uses trapezoidal, and another which uses spline-function integrations in order to obtain. the surface departures, given surface slope values obtained from the measured spot locations. Also considered is the effect of the number of holes used in the surface sampling compared to the method of analysis.

Paper Details

Date Published: 3 May 1979
PDF: 3 pages
Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); doi: 10.1117/12.957113
Show Author Affiliations
I. Ghozell, Kitt Peak National Observatory (United States)

Published in SPIE Proceedings Vol. 0172:
Instrumentation in Astronomy III
David L. Crawford, Editor(s)

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