Wave-front compensation for imaging with off-axis guide stars.

Details Wave-front compensation for imaging with off-axis guide stars. Wave-front compensation for imaging with off-axis guide stars.

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994josaa..11..339t&link_type=abstract

Journal of the Optical Society of America A, Vol. 11, No. 1, p. 339 - 346

Physics

Optics

7

Adaptive Optics: Guide Stars

Scientific paper

The impact of using an off-axis pulsed laser backscatter reference for compensation of an imaging system is evaluated. For low backscatter altitudes imaging is only weakly affected when the beacon is not in the same direction as the object being studied. In fact, a misalignment of several isoplanatic patch sizes cause only a minor degradation in performance. For high backscatter altitudes the degradation is quite significant once the angular misalignment is approximately an isoplanatic patch size. Performance is hardly degraded for backscatter altitudes of 5 and 10 km; however, when the backscatter altitude is increased to 20 km or higher, significant degradation results.

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