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21 March 1997 Piston detection of a segmented mirror telescope using a curvature sensor: preliminary results with numerical simulations
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Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269088
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden
Abstract
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.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jose M. Rodriguez-Ramos and Jesus Jimenez Fuensalida "Piston detection of a segmented mirror telescope using a curvature sensor: preliminary results with numerical simulations", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269088
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