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Proceedings Paper

Efficient testing of off-axis aspheres with test plates and computer-generated holograms
Author(s): James H. Burge
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Paper Abstract

Off axis aspheric surfaces, such as individual segments for a telescope mirror, and surfaces that do not have any optical axis are traditionally difficult to test. In addition to difficulties controlling the aspheric shape, mirror segments have tight on radius of curvature and optical axis position. This paper presents a new method of measuring these surfaces that uses a test plate with a spherical reference surface, in combination with a small computer generated hologram to compensate the aspheric departure. The example for measuring 1.8-m segments of a 10-m primary mirror is given.

Paper Details

Date Published: 11 November 1999
PDF: 10 pages
Proc. SPIE 3782, Optical Manufacturing and Testing III, (11 November 1999); doi: 10.1117/12.369207
Show Author Affiliations
James H. Burge, Optical Sciences Ctr./Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 3782:
Optical Manufacturing and Testing III
H. Philip Stahl, Editor(s)

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