Launch-rated kinematic mirror mount with six-degree-of-freedom adjustments

Kevin A. Sawyer; Barbara N. Hurley; Raymond R. Brindos; James Wong

doi:10.1117/12.363806

28 September 1999 Launch-rated kinematic mirror mount with six-degree-of-freedom adjustments

Kevin A. Sawyer, Barbara N. Hurley, Raymond R. Brindos, James Wong

Proceedings Volume 3786, Optomechanical Engineering and Vibration Control; (1999) https://doi.org/10.1117/12.363806
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

A kinematic, fully adjustable, six degree-of-freedom mirror mount has been developed for a space-based optical system. The optics vary in size from five inches to 10-inches and weigh up to 1.75 Kg. Many of the optics require multiple degrees-of-freedom for alignment and all elements need to be held to micron tolerances during orbit. The mount design described herein provides three-axis linear motions of at least three millimeters and multiple degrees of tilt. Each mount weighs approximately the same as its optic and exhibits gravity deflections less than .0002 radian. Natural frequencies for even the largest mirror mounts in the system are greater than 100 Hz. A unique feature of the mount design is the ability to easily adjust the mirror from behind without the need for complex jigs or tooling. The mirror mount is entirely self contained and is mechanically locked after final adjustments are made. A motion algorithm based on hexapod simulator control laws has been adopted to calculate the leg adjustments required to perform the mirror motions of tip, tilt, yaw, focus, and the two lateral shifts.

Citation Download Citation

Kevin A. Sawyer, Barbara N. Hurley, Raymond R. Brindos, and James Wong "Launch-rated kinematic mirror mount with six-degree-of-freedom adjustments", Proc. SPIE 3786, Optomechanical Engineering and Vibration Control, (28 September 1999); https://doi.org/10.1117/12.363806

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