Abstract

SALINAS-LUNA, J.; LUNA-AGUILAR, E.  and  CORNEJO-RODRIGUEZ, A.. Detección de pistón por polarimetría. Rev. mex. fis. [online]. 2004, vol.50, n.3, pp.323-330. ISSN 0035-001X.

We report a qualitative method to detect piston errors in an optical segmented surface. The test consists of illuminating a segmented surface, with a spherical wavefront coming from a linearly polarized beam. The behavior of the vectors of polarization of the light in the reflected beam are analyzed doing the experimental measurement of the Stokes parameters U and Q, rotating the analyzer for four positions of 0,45,90 and 135 degrees. The mirror used for this test has 20 and 120 centimeters for the diameter and the paraxial radius of curvature, respectively.

Keywords : Segmented mirrors; polarization; cophasing and piston detection; curvature sensing.

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