Outgoing-Wave Adaptive Optics Systems: Error-Sensing Method In The Case Of Extended Targets In Turbulence

Luc R. Bissonnette

doi:10.1117/12.934197

23 August 1983 Outgoing-Wave Adaptive Optics Systems: Error-Sensing Method In The Case Of Extended Targets In Turbulence

Luc R. Bissonnette

Author Affiliations +

Proceedings Volume 0365, Adaptive Optics Systems and Technology; (1983) https://doi.org/10.1117/12.934197
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

Abstract

The conventional feedback of multidither outgoing-wave adaptive optical systems is inoperative in the presence of a featureless target resolved by the transmitting optics. This paper proposes to define an artificial glint by imaging the target laser pattern on a pinhole aperture. The concept is somewhat obvious but, in turbulence, the existing theory on resolution and coherence states that it is restricted to small scintillation strength. It is shown, through correlation measurements between the target irradiance and the artifificial-glint irradiance, that the range of validity is much broader than predicted. Operational tests with a two-degree-of-freedom system demonstrate that the artificial-glint technique allows effective tracking and tilt compensation at propagation distances reaching far into the scintillation-saturation region, in disagreement with recent models.

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Luc R. Bissonnette "Outgoing-Wave Adaptive Optics Systems: Error-Sensing Method In The Case Of Extended Targets In Turbulence", Proc. SPIE 0365, Adaptive Optics Systems and Technology, (23 August 1983); https://doi.org/10.1117/12.934197

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