A precision cryogenic positioning stage for detector dithering and flexure compensation

Stephen A. Smee; Stephen C. Hope; Randolph P. Hammond; Albert C. Harding; Tyson Hare; Aidan C. Gray; Katherine G. Smee; Leon Aslan; Robert H. Barkhouser; Andrea Bianco; Christoph Birk; Maren Cosens; Michele Frangiamore; Daniel D. Kelson; Gerrad Killian; Nicholas P. Konidaris II; Alicia Lanz; Jacob McCloskey; Andrew B. Newman; Solange Ramirez; Gwen C. Rudie; Andrea Vanella; Jason E. Williams

doi:10.1117/12.3020298

26 August 2024 A precision cryogenic positioning stage for detector dithering and flexure compensation

Stephen A. Smee, Stephen C. Hope, Randolph P. Hammond, Albert C. Harding, Tyson Hare, Aidan C. Gray, Katherine G. Smee, Leon Aslan, Robert H. Barkhouser, Andrea Bianco, Christoph Birk, Maren Cosens, Michele Frangiamore, Daniel D. Kelson, Gerrad Killian, Nicholas P. Konidaris II, Alicia Lanz, Jacob McCloskey, Andrew B. Newman, Solange Ramirez, Gwen C. Rudie, Andrea Vanella, Jason E. Williams

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131002Y (2024) https://doi.org/10.1117/12.3020298
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

This paper presents the design and technical progress of a precision X-Y stage for detector dithering and flexure compensation being developed for the Magellan InfraRed Multi-Object Spectrograph, MIRMOS. Designed to operate at 80 K, the stage will accurately control detector position in two orthogonal degrees of freedom. The piezo-driven flexure stage is very compact providing high-resolution backlash-free motion of the detector. A magneto resistive bridge provides position feedback in each degree of freedom, greatly reducing hysteresis, which is common in piezoelectric actuators. The system is designed to operate in open loop using a lookup table keyed to the Nasmyth rotator angle for flexure control. Here, the optomechanical design of the stage, electrical control system, and performance results from early prototype efforts are presented and discussed.

Conference Presentation

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Stephen A. Smee, Stephen C. Hope, Randolph P. Hammond, Albert C. Harding, Tyson Hare, Aidan C. Gray, Katherine G. Smee, Leon Aslan, Robert H. Barkhouser, Andrea Bianco, Christoph Birk, Maren Cosens, Michele Frangiamore, Daniel D. Kelson, Gerrad Killian, Nicholas P. Konidaris II, Alicia Lanz, Jacob McCloskey, Andrew B. Newman, Solange Ramirez, Gwen C. Rudie, Andrea Vanella, and Jason E. Williams "A precision cryogenic positioning stage for detector dithering and flexure compensation", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131002Y (26 August 2024); https://doi.org/10.1117/12.3020298

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