Versatile wavefront simulator

Enrico Marchetti; Roberto Ragazzoni; Jacopo Farinato; Adriano Ghedina

doi:10.1117/12.268975

21 March 1997 Versatile wavefront simulator

Enrico Marchetti, Roberto Ragazzoni, Jacopo Farinato, Adriano Ghedina

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.268975
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

A new concept for a device able to simulate evolving atmospherically distorted wavefronts for the adaptive optics system of the Italian facility Telescopio Nazionale Galileo (TNG) is presented. The goodness of performances of an adaptive optics system depends upon the testing accuracy of its components made under different seeing conditions. Moreover, in order to not loose good seeing nights, the possibility to perform tests during day-light can become strongly important. Introducing a simulator able to generate the image of an astronomical object deformed by atmosphere can help to solve many such problems. In order to create the wanted distortion we use phase changing plate (PCP) screens. A system of moving screens and adjustable zooms provides to change, over a wide range, some fundamental parameters of the atmosphere turbulence like fired parameter r_o, Greenwood frequency f_G and the isoplanatic angle (theta) _o.

Citation Download Citation

Enrico Marchetti, Roberto Ragazzoni, Jacopo Farinato, and Adriano Ghedina "Versatile wavefront simulator", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.268975

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