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Proceedings Paper

Enhanced dynamic range of the grating array based zonal wavefront sensor using a zone wise scanning method
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Paper Abstract

Grating array based zonal wavefront sensor (GAZWFS), using an array of gratings implemented with a liquid crystal spatial light modulator (LCSLM) to display the gratings, offers a flexible measurement approach. But the wavefront with a large slope may not accurately be sensed by the sensor like any Shack- Hartmann type sensor. In this paper, we propose a zone wise scanning method to improve the dynamic range of GAZWFS by blocking and unblocking the individual gratings. The estimation of the wavefront and expansion of the dynamic range of GAZWFS by the zone wise scanning method is demonstrated by numerical simulation and a proof-of-principle experimental implementation.

Paper Details

Date Published: 2 March 2020
PDF: 6 pages
Proc. SPIE 11287, Photonic Instrumentation Engineering VII, 112870E (2 March 2020); doi: 10.1117/12.2542084
Show Author Affiliations
Nagendra Kumar, Indian Institute of Technology Guwahati (India)
Alika Khare, Indian Institute of Technology Guwahati (India)
Bosanta R. Boruah, Indian Institute of Technology Guwahati (India)


Published in SPIE Proceedings Vol. 11287:
Photonic Instrumentation Engineering VII
Yakov Soskind; Lynda E. Busse, Editor(s)

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