Laser guide star in the form of crossed lines: additional capabilities

Details Laser guide star in the form of crossed lines: additional capabilities Laser guide star in the form of crossed lines: additional capabilities

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4007..322s&link_type=abstract

Proc. SPIE Vol. 4007, p. 322-329, Adaptive Optical Systems Technology, Peter L. Wizinowich; Ed.

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Scientific paper

The capabilities of making of a laser guide star in the form of the crossed lines produced by laser beams into high atmosphere are considered. It is shown, that there is some optimum distance (APEQ 1 km) between a telescope and lasers, at which one the requirements of excitation of a star are optimum. The requirements to energy and time responses of lasers are determined. The estimation of additional opportunities given a two dimensional spatial configuration of a laser guide star for neutralization of distortions, which are produced by atmosphere turbulence, is made. These capabilities are bound with that distortions produced by turbulence on a ray path hill up and downwards have different character and the processing can separate them. The future processing logic of the information should isolate inphase motions of separate regions of a linear LGS describing oscillations of a laser beam at distribution hill up and to reduce to minimum reaction of system correction of a wavefront on these oscillations. The analysis of capabilities of neutralization of an atmospheric turbulence at usage of two- dimensional laser guide star in adaptive optical systems consisting of two telescopes is made.

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