Indirect wave front sensing

Details Indirect wave front sensing Indirect wave front sensing

2011-04-05

2011-04-05

Sohn, Seung C (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C600S437000

Reexamination Certificate

active

07919741

ABSTRACT:
Described are systems and methods that compensate for phase aberration in a high energy laser (HEL) without the need for a “beacon” laser or a wave front sensor to measure the phase aberration in the return signal from the “beacon” laser. In one aspect, the systems and methods use an imaging camera to image a HEL hit spot on a target, estimate the phase aberration of the HEL at the target based on the image of the HEL hit spot, and compensate for the phase aberration in the HEL using the estimated phase aberration. Also described are systems and methods that clean up an image of a target by estimating a wave aberration of an incoming beam based on the image of the target and clean up the image of the target using the estimated wave front aberration.

REFERENCES:
patent: 6485423 (2002-11-01), Angelsen et al.
patent: 6905465 (2005-06-01), Angelsen et al.
patent: 7273455 (2007-09-01), Angelsen et al.
Um, G.S., B.F. Smithgall & C.L. O'Brien, “Minimum Variance Estimation of Wavefront Aberration” Proc. SPIE 351, 96-102 (1982).
W.H. Southwell, “Wave-front analyzer using a maximum likelihood algorithm,” J. Opt. Soc. Am., vol. 67, No. 3, Mar. 1977, pp. 396-399.
M.R. Teague, “Irradiance moments: their propagation and use for unique retrieval of phase,” JOSA 72, 1199-1209 (1982).

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