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Signal-to-noise ratio tuned adaptive optics control system

  • US 20050006559A1
  • Filed: 06/25/2003
  • Published: 01/13/2005
  • Est. Priority Date: 06/25/2003
  • Status: Active Grant
First Claim
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1. An adaptive optics control system for distorted optical wavefronts, comprising:

  • a wavefront corrector having a surface controlled by a plurality of actuators;

    a wavefront slope sensor having subaperture separation means for defining a plurality of subapertures through which the distorted wavefront can pass, each subaperture corresponding to each actuator of the wavefront corrector, the wavefront slope sensor being adapted to measure the wavefront slope through each subaperture and generate a wavefront slope sensor output signal for each subaperture indicative of the distortion of the wavefront;

    a wavefront reconstructor adapted to receive the wavefront slope sensor output signals and calculate a phase estimate for each of the actuators of the wavefront corrector, the phase estimate having a signal-to-noise ratio, the wavefront reconstructor being further adapted to generate a plurality of correction signals, each having a bandwidth, based on said phase estimates; and

    a wavefront controller adapted to selectively adjust the bandwidth of each correction signal based on the signal-to-noise ratio of the estimated phase calculated by the wavefront reconstructor.

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