High-Bandwidth Lightweight Primary Mirror Concept Demonstration

S. Johnson; T. Farrell; C. Neufeld

doi:10.1117/12.940478

6 October 1987 High-Bandwidth Lightweight Primary Mirror Concept Demonstration

S. Johnson, T. Farrell, C. Neufeld

Proceedings Volume 0779, Electromechanical System Interaction with Optical Design; (1987) https://doi.org/10.1117/12.940478
Event: 1987 Technical Symposium Southeast on Optics, Electro-Optics, and Sensors, 1987, Orlando, FL, United States

Abstract

A unique approach to achieving high temporal bandwidth control of large active primary mirrors has been conceived and demonstrated experimentally. This high speed control is accomplished via implementation of a lightweight, reactionless facesheet that overcomes the typical mechanical resonance limitations on bandwidth for large primary mirror assemblies. Laboratory testing of a reactionless facesheet breadboard has: . Validated the reactionless principles of self-canceling symmetry of mass motion and stiffness forces . Confirmed the localized influence function of the inherently stiff high density, piezoelectric actuators used to control the mirror surface figure . Confirmed the feasibility of achieving high bandwidth control of large primary mirrors. This paper describes the design, test methods, and results of a concept demonstration and compares test data and predicted response.

Citation Download Citation

S. Johnson, T. Farrell, and C. Neufeld "High-Bandwidth Lightweight Primary Mirror Concept Demonstration", Proc. SPIE 0779, Electromechanical System Interaction with Optical Design, (6 October 1987); https://doi.org/10.1117/12.940478

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