Design considerations of a slit diaphragm flexure used in a precision mirror gimbal

Brian Cox; Morris Kaufman

doi:10.1117/12.890913

24 September 2011 Design considerations of a slit diaphragm flexure used in a precision mirror gimbal

Brian Cox, Morris Kaufman

Proceedings Volume 8125, Optomechanics 2011: Innovations and Solutions; 81250R (2011) https://doi.org/10.1117/12.890913
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

Two precision mirror gimbals were designed using slit diaphragm flexures to provide two-axis precision mirror alignment in space-limited applications. Both gimbals are currently in use in diagnostics at the National Ignition Facility: one design in the Gamma Reaction History (GRH) diagnostic and the other in the Neutron Imaging System (NIS) diagnostic. The GRH gimbal has an adjustment sensitivity of 0.1 mrad about both axes and a total adjustment capability of ±6°; the NIS gimbal has an adjustment sensitivity of 0.8 μrad about both axes and a total adjustment range of ±3°. Both slit diaphragm flexures were electro-discharge machined out of high-strength titanium and utilize stainless steel stiffeners. The stiffener-flexure design results in adjustment axes with excellent orthogonality and centering with respect to the mirror in a single stage; a typical two-axis gimbal flexure requires two stages. Finite element analyses are presented for both flexure designs, and a design optimization of the GRH flexure is discussed.

Citation Download Citation

Brian Cox and Morris Kaufman "Design considerations of a slit diaphragm flexure used in a precision mirror gimbal", Proc. SPIE 8125, Optomechanics 2011: Innovations and Solutions, 81250R (24 September 2011); https://doi.org/10.1117/12.890913

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