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Proceedings Paper

Seeing monitor based on wavefront curvature sensing
Author(s): Francois J. Roddier; J. Elon Graves; Eric J. Limburg
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Paper Abstract

A new wavefront sensing technique called curvature sensing is described. It maps the wavefront total curvature rather than its slope and has been applied to an experimental seeing monitor which detects turbulence induced fast focus fluctuations. Some of the advantages this monitor presents, as compared to DIMM's, are: (1) sensitivity is increased by the use of a circular pupil, (2) the cost is lowered by the use of a photomultiplier, (3) the loss of signal is prevented by the system's fast run, (4) the system runs continuously, and (5) the noise bias is continuously measured and subtracted out.

Paper Details

Date Published: 1 July 1990
PDF: 6 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19217
Show Author Affiliations
Francois J. Roddier, Univ. of Hawaii/Manoa (United States)
J. Elon Graves, Univ. of Hawaii/Manoa (United States)
Eric J. Limburg, National Optical Astronomy Observatories (USA) and Univ. of (Australia)

Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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