Design of an Interferometric System for the Measurement of Phasing Errors in Segmented Mirrors
Applied Optics, Vol. 41, Issue 22, pp. 4562-4570 (2002)
http://dx.doi.org/10.1364/AO.41.004562
Acrobat PDF (1216 KB)
Abstract
One of the new problems that has to be solved for segmented mirrors is related to periodic phasing, because for such mirrors to exhibit diffraction-limited performance the segments have to be positioned with an accuracy of a fraction of a wavelength. We describe the optical design of an instrument that measures the phasing errors (i.e., tip, tilt, and piston) between two segments under daylight conditions. Its design is based on a high-aperture white-light Michelson interferometer. It was developed at the Center for Sensors, Instruments and Systems Development (CD6) of the Technical University of Catalunya, Spain, and its final testing was carried out on the Gran Telescopio Canarias test workbench.
© 2002 Optical Society of America
OCIS Codes
(110.6770) Imaging systems : Telescopes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(350.1260) Other areas of optics : Astronomical optics
Citation
Carles Pizarro, Josep Arasa, Ferran Laguarta, Núria Tomàs, and Agusti Pintó, "Design of an Interferometric System for the Measurement of Phasing Errors in Segmented Mirrors," Appl. Opt. 41, 4562-4570 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-22-4562
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