Remote alignment of segmented mirrors with far-field optimization

Details Remote alignment of segmented mirrors with far-field optimization Remote alignment of segmented mirrors with far-field optimization

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apopt..31.6510m&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 31, no. 30, p. 6510-6518.

Physics

Optics

3

Adaptive Optics, Alignment, Far Fields, Mirrors, Spaceborne Astronomy, Optimization, Remote Sensing, Telescopes

Scientific paper

A novel approach for the remote alignment of segmented mirrors is presented. In comparison with conventional methods in which near-field measurements (in the form of displacements between neighboring segments or phase across the mirror) are used in a feedback control system, the far-field optimization method utilizes only attributes of the point-spread function. A figure of merit based on the far-field intensity is used to configure iteratively the segmented mirror to alignment. Following computer simulations, we conduct successful laboratory experiments to validate the far-field optimization concept. The potential utility of far-field optimization to the alignment of other adaptive optical systems and to dynamic wave-front control is briefly discussed.

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