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Proceedings Paper

Shearing-interferometer-based smart-pixel adaptive optics chip
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Paper Abstract

An adaptive optics system is being developed, which uses integrated circuit technology along with diffractive optics to crete a very compact system. A lenslet array focuses incoming light onto individual actuators. Phase modulation is applied with electrostatic attraction. Gratings on the mirrors split off a part of the light for wavefront sampling. Optics on the back side of the lenslet array combine neighboring beams and focus onto detector elements. This creates a shearing measurement in two orthogonal directions. A resistive grid network reconstructs the wavefront from the individual measurements, and a feedback system nulls the outgoing wave. This paper contains simulations and analysis of the system. A 1D array was simulated, including the wavefront measurement and correction. A sine wave was input to the system, and the resulting phase and point spread function were calculated. System analysis of the wavefront reconstruction and feedback are discussed. Test results for a non-shearing interferometer are presented. Some test results from a test chip are also provided.

Paper Details

Date Published: 27 April 1999
PDF: 9 pages
Proc. SPIE 3649, Sensors, Cameras, and Systems for Scientific/Industrial Applications, (27 April 1999); doi: 10.1117/12.347070
Show Author Affiliations
Jay A. Hammer, SY Technology, Inc. (United States)
Gregg T. Borek, SY Technology, Inc. (United States)
Rodney L. Clark, SY Technology, Inc. (United States)

Published in SPIE Proceedings Vol. 3649:
Sensors, Cameras, and Systems for Scientific/Industrial Applications
Morley M. Blouke; George M. Williams Jr., Editor(s)

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