MARTINI: sensing and control system design

Andrew Peter Doel; Colin N. Dunlop; John Victor Major; Richard M. Myers; Ray M. Sharples

doi:10.1117/12.51202

13 January 1992 MARTINI: sensing and control system design

Andrew Peter Doel, Colin N. Dunlop, John Victor Major, Richard M. Myers, Ray M. Sharples

Proceedings Volume 1543, Active and Adaptive Optical Components; (1992) https://doi.org/10.1117/12.51202
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The Multiple Aperture Real Time Image Normalization Instrument (MARTINI) is an astronomical adaptive optics system for visible imaging and spectroscopic feedthrough at the 4.2-m William Herschel Telescope on La Palma. It consists of a six-subaperture, tip-tilt-piston, segmented mirror device and uses 4r(0) aperture-matching to provide optimum slope removal in zones large enough for operation in the visible and with reference objects fainter than V = 13 exp m. This limit is achieved by optimizing the use of reference light, by analyzing the information from a photon counting wavefront sensor using a non-flaming (i.e., irregular sampling) infinite impulse response filter for estimation and prediction of the wavefront slopes. The value of this approach is discussed along with its extension to higher-order correction schemes. Experimental evidence supporting the theoretical basis of the MARTINI system is also presented. The astronomical potential of such an approach, and the drawbacks, are outlined.

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Andrew Peter Doel, Colin N. Dunlop, John Victor Major, Richard M. Myers, and Ray M. Sharples "MARTINI: sensing and control system design", Proc. SPIE 1543, Active and Adaptive Optical Components, (13 January 1992); https://doi.org/10.1117/12.51202

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