Limited degree-of-freedom adaptive optics and image reconstruction

Details Limited degree-of-freedom adaptive optics and image reconstruction Limited degree-of-freedom adaptive optics and image reconstruction

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apopt..30.4227r&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 30, Oct. 10, 1991, p. 4227-4233.

Physics

Optics

35

Adaptive Optics, Degrees Of Freedom, Image Reconstruction, Optical Filters, Algorithms, Atmospheric Turbulence, Transfer Functions, Wave Fronts

Scientific paper

The use of limited degree-of-freedom adaptive optics in conjunction with statistical averaging and a linear image reconstruction algorithm is addressed. Image reconstruction is traded for full predetection compensation. It is shown through analytic calculations that the average optical transfer function (OTF) is significant for a high spatial frequencies in the case of imaging through atmospheric turbulence with an adaptive optics system composed of a Hartmann-type wavefront sensor and a deformable mirror possessing far fewer actuators than one per atmospheric coherence diameter (r0). Statistical averaging is used to overcome the effects of measurement noise and randomness in individual realizations of the OTF. The imaging concept and signal-to-noise considerations are presented.

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