Abstract

A two-mirror laser beam expander can be used to provide small amounts of beam steering by moving one mirror. Such a motion would generally introduce aberrations into the output wavefront that would restrict the amount of diffraction-limited beam steering achievable to very small amounts. This paper describes how some or all of the third-order aberrations introduced by moving one mirror can be eliminated. By proper design, substantial amounts of diffraction-limited beam steering can be achieved.

© 1978 Optical Society of America

Four-mirror unobscured anastigmatic telescopes with all-spherical surfaces

David R. Shafer
Appl. Opt. 17(7) 1072-1074 (1978)

Spectrally narrow pulsed dye laser without beam expander

Michael G. Littman and Harold J. Metcalf
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I. Powell
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