13 January 1992 MARTINI: sensing and control system design
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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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andrew Peter Doel, Colin N. Dunlop, John Victor Major, Richard M. Myers, Ray M. Sharples, "MARTINI: sensing and control system design", Proc. SPIE 1543, Active and Adaptive Optical Components, (13 January 1992); doi: 10.1117/12.51202; https://doi.org/10.1117/12.51202
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