Novel deformable mirror design for possible wavefront correction in CO[sub]2[/sub] laser fusion system

S. V. Gunn; T. A. Heinz; W. D. Henderson; N. A. Massie; V. K. Viswanathan

doi:10.1117/12.957751

13 November 1980 Novel deformable mirror design for possible wavefront correction in CO₂ laser fusion system

S. V. Gunn, T. A. Heinz, W. D. Henderson, N. A. Massie, V. K. Viswanathan

Proceedings Volume 0190, Los Alamos Conference on Optics 1979; (1980) https://doi.org/10.1117/12.957751
Event: Los Alamos Conference on Optics '79, 1979, Los Alamos, United States

Abstract

Analysis at Los Alamos and elsewhere has resulted in the conclusion that deformable mirrors can substantially improve the optical performance of laser fusion systems, as the errors are mostly static or quasi-static with mainly low spatial frequencies across the aperture resulting in low order Seidel aberrations in the beam. A novel deformable mirror assembly (Fig. 1) has been fabricated with 19 actuators capable of surface deflection of ±20 microns. The mirror surface deflections are produced by a unique differential ball screw that acts as both a force and position actuator. The screw is driven by a stepper motor giving a surface positioning resolution of 0.025 micron. No holding voltage potential is required, and a piezoceramic element in series with each ball screw provides a ±1 micron amplitude high-frequency surface dither to aid the correction process. Mirror performance in terms of individual actuator influence function, cross-coupling, figure attainment, long-term surface stability as well as optical performance characteristics will be discussed.

Citation Download Citation

S. V. Gunn, T. A. Heinz, W. D. Henderson, N. A. Massie, and V. K. Viswanathan "Novel deformable mirror design for possible wavefront correction in CO₂ laser fusion system", Proc. SPIE 0190, Los Alamos Conference on Optics 1979, (13 November 1980); https://doi.org/10.1117/12.957751

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