Bibcode
Rodriguez-Ramos, J. M.; Fuensalida, J. J.
Referencia bibliográfica
Proc. SPIE Vol. 2871, p. 613-616, Optical Telescopes of Today and Tomorrow, Arne L. Ardeberg; Ed.
Advertised on:
3
1997
Número de citas
6
Número de citas referidas
5
Descripción
Segments alignment is one of the fundamental factors affecting the shape
of the PSF of a segmented mirror telescope. Tilt and piston of each
segment must be very well and uniformly adjusted in relation with the
rest of the segments. The Hartmann-Shack sensor is very efficient in
detecting the local wavefront tilt, but the task to take measurements of
piston using this sensor is annoying enough specially when the
wavefronts are affected by atmospheric turbulence. We show, with
numerical simulations, that curvature sensing is sensitive enough in
order to detect piston errors in the segmented mirrors, even in the
presence of the atmospheric turbulence. It would permit the taking of
measurements of piston with natural stars during observation time.