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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 19 — Oct. 1, 2005
  • pp: 2572–2574

Pyramid sensor for segmented mirror alignment

S. Esposito, E. Pinna, A. Puglisi, A. Tozzi, and P. Stefanini  »View Author Affiliations


Optics Letters, Vol. 30, Issue 19, pp. 2572-2574 (2005)
http://dx.doi.org/10.1364/OL.30.002572


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Abstract

We report what is to our knowledge the first laboratory experiment that shows the use of a pyramid wavefront sensor to cophase and align segmented mirrors having three degrees of freedom per segment, i.e., piston, tip, and tilt. In the laboratory the iterative alignment procedure reached a wavefront residual error of about 10 nm. The residual error was equally distributed between piston, tip, and tilt. These results demonstrate that the pyramid can successfully simultaneously sense the piston, tip, and tilt of a segmented mirror. This last feature makes this technique very attractive in phasing and aligning astronomical segmented telescopes such as extremely large telescopes currently under extensive studies.

© 2005 Optical Society of America

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(350.1260) Other areas of optics : Astronomical optics
(350.4800) Other areas of optics : Optical standards and testing

ToC Category:
Instrumentation, Measurement, and Metrology

Citation
S. Esposito, E. Pinna, A. Puglisi, A. Tozzi, and P. Stefanini, "Pyramid sensor for segmented mirror alignment," Opt. Lett. 30, 2572-2574 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-19-2572

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