Slope detection method by modulated speckle patterns

MARTHA MOLINA; MARIA DEL CARMEN LASPRILLA A; MYRIAN TEBALDI; NESTOR BOLOGNINI

OPTIK

ELSEVIER GMBH

Lugar: Jena; Año: 2011 vol. 122 p. 228 - 234

0030-4026

An optical technique for slope detection by using as storing medium a photorefractive BSO crystal is proposed. The technique relays in that a local tilt produced in a diffusing reflective surface can be mapped as a speckle transversal shifting in a plane perpendicular to the optical axis. The volume nature of the storing medium is quite adequate to highlight the speckle volume nature and its associated properties. Experimental results obtained by using a rubber vibrating membrane are presented