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Proceedings Paper

A New Instrument For Routine Optical Testing Of General Aspherics
Author(s): Peter M. Emmet; Kang M. Leung
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Paper Abstract

A unique and versatile laser interferometer has been jointly developed by Honeywell, Tropel and the University of Arizona. The system is designed for routine non-contact testing of aspheric optical surfaces (using a Computer-Generated Hologram [CGH] to provide the aspheric component of the reference wavefront) while retaining the features and capabilities of the standard Tropel Vertical Interferometer. Thus it is capable of measuring radius and/or optical figure of spheres, flats, conics and general aspherics. The instrument provides convenient interchangeability among Fizeau, Twyman-Green, CGH and Lateral Shearing modes of operation in a single compact unit. It is also capable of direct inter-facing with a computer for wavefront measurement or analysis. The operation of the system is described and data is presented from a CGH test of an f/2 paraboloid (using a spherical test wavefront) for which independent comparative data is also given.

Paper Details

Date Published: 4 April 1979
PDF: 9 pages
Proc. SPIE 0171, Optical Components: Manufacture and Evaluation, (4 April 1979);
Show Author Affiliations
Peter M. Emmet, Tropel Inc. (United States)
Kang M. Leung, Honeywell Corporate Materials Sciences Center (United States)

Published in SPIE Proceedings Vol. 0171:
Optical Components: Manufacture and Evaluation
Donald S. Nicholson, Editor(s)

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