A New Instrument For Routine Optical Testing Of General Aspherics

Peter M. Emmet; Kang M. Leung

doi:10.1117/12.957050

4 April 1979 A New Instrument For Routine Optical Testing Of General Aspherics

Peter M. Emmet, Kang M. Leung

Proceedings Volume 0171, Optical Components: Manufacture and Evaluation; (1979) https://doi.org/10.1117/12.957050
Event: Los Angeles Technical Symposium, 1979, Los Angeles, United States

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.

Citation Download Citation

Peter M. Emmet and Kang M. Leung "A New Instrument For Routine Optical Testing Of General Aspherics", Proc. SPIE 0171, Optical Components: Manufacture and Evaluation, (4 April 1979); https://doi.org/10.1117/12.957050

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