Wavefront reconstruction using self-referenced direct-drive adaptive optics

Jacques E. Ludman; H. John Caulfield; Val N. Morozov

doi:10.1117/12.147893

12 July 1993 Wavefront reconstruction using self-referenced direct-drive adaptive optics

Jacques E. Ludman, H. John Caulfield, Val N. Morozov

Proceedings Volume 1806, Optical Computing; (1993) https://doi.org/10.1117/12.147893
Event: Topical Meeting on Optical Computing, 1992, Minsk, Belarus

Abstract

Adaptive optical systems can be used to clean up atmospherically disturbed beams or to predistort a clean beam so that it phase compensates the atmospheric disturbance in passing back through the atmosphere (1-4). Such systems need to deal with the whole wavefront to smooth it, so global measurements must be processed to obtain that information. This mitigates against local, pixel-by-pixel independent operation of the active phase controller (SLM). Thus, a tension arises between the need for a global fit and the speed and convenience of purely local operation. A description of the entire front of the wave is necessary because no local measurement such as made by a shearing interferometer or the Hartmann test, can separate a global trend from a local fluctuation. These samples of derivatives must be integrated into a global pattern. On the other hand, global calculations take time. A purely local, adaptive optical system would be simpler and faster. We will show how to use global self—referencing to allow local adaptive optics to be used in a "pure optical" system - no conventional, discrete component optics will be needed, in principle

Citation Download Citation

Jacques E. Ludman, H. John Caulfield, and Val N. Morozov "Wavefront reconstruction using self-referenced direct-drive adaptive optics", Proc. SPIE 1806, Optical Computing, (12 July 1993); https://doi.org/10.1117/12.147893

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