Comparison Of Square Screen Results Analyzed By Two Different Methods

I. Ghozell

doi:10.1117/12.957113

3 May 1979 Comparison Of Square Screen Results Analyzed By Two Different Methods

I. Ghozell

Proceedings Volume 0172, Instrumentation in Astronomy III; (1979) https://doi.org/10.1117/12.957113
Event: Instrumentation in Astronomy, 1979, Tucson, United States

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.

Citation Download Citation

I. Ghozell "Comparison Of Square Screen Results Analyzed By Two Different Methods", Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); https://doi.org/10.1117/12.957113

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