Abstract
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 over a current range of 0 to . Actuation of R redirects the grating normal, resulting in a scanning motion of the diffracted beam.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Raphael A. Guerrero, Sarah Jaye C. Oliva, and Johanna Mae M. Indias
Appl. Opt. 51(24) 5812-5817 (2012)
Boonsong Sutapun, Massood Tabib-Azar, and Michael A. Huff
Appl. Opt. 37(28) 6811-6815 (1998)
Nazmul Hasan, Hanseup Kim, and Carlos H. Mastrangelo
Opt. Express 24(12) 13334-13342 (2016)