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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 19 — Jul. 1, 2010
  • pp: 3634–3639

Deformable curvature and beam scanning with an elastomeric concave grating actuated by a shape memory alloy

Raphael A. Guerrero, Michelle Wynne C. Sze, and Jose Ramon A. Batiller  »View Author Affiliations

Applied Optics, Vol. 49, Issue 19, pp. 3634-3639 (2010)

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A concave diffraction grating with a tunable radius of curvature R is fabricated by embedding a nitinol wire within an elastomeric grating replica. Curvature of the grating is controlled via the shape memory effect, where strain in the wire is recovered due to martensite–austenite phase transformations induced by resistive heating. The generated force bends the grating into a variable curvature determined by applied current. The radius of curvature for the concave grating is variable from 170 to 44 mm over a current range of 0 to 2.5 A . Actuation of R redirects the grating normal, resulting in a scanning motion of the diffracted beam.

© 2010 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(230.1950) Optical devices : Diffraction gratings

ToC Category:
Optical Devices

Original Manuscript: December 3, 2009
Revised Manuscript: June 5, 2010
Manuscript Accepted: June 9, 2010
Published: June 22, 2010

Raphael A. Guerrero, Michelle Wynne C. Sze, and Jose Ramon A. Batiller, "Deformable curvature and beam scanning with an elastomeric concave grating actuated by a shape memory alloy," Appl. Opt. 49, 3634-3639 (2010)

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