Four-quadrant error sensor that yields position and focus utilizing an internal mirrorlette array

Details Four-quadrant error sensor that yields position and focus utilizing an internal mirrorlette array Four-quadrant error sensor that yields position and focus utilizing an internal mirrorlette array

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4008.1413v&link_type=abstract

Proc. SPIE Vol. 4008, p. 1413-1422, Optical and IR Telescope Instrumentation and Detectors, Masanori Iye; Alan F. Moorwood; Eds.

Physics

Instrumentation and Detectors

Scientific paper

The concept and design for a novel four-quadrant position and focus error sensor are presented. Expected performance and theory of operation of the astigmatic focus sensor are presented. Features include wide field of view, broad wavelength coverage, high efficiency, integral field and pupil stops, and alignment and assembly benefits. A new method for sectioning the field is utilized, an internal mirrorlette array (IMA). The advantages of the IMA are given. This error sensor is implemented in the WIYN Tip-Tilt Module, an add-on imaging instrument for the 3.5 m WIYN telescope at Kitt Peak National Observatory.

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