Title :
Magnetically-actuated MEMS cat´s eye retroreflectors for optical identification
Author :
Tzu-yu Chen;Chih-chieh Chang;Shao-an Chien;Nai-wen Chang;Jui-che Tsai
Author_Institution :
Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
Abstract :
We present a MEMS tunable cat´s eye retroreflector consisting of a rotational concave reflecting micromirror which provides the modulation of the optical retroreflection intensity. Magnetic beads are attached to this rotatable unit to enable magnetic actuation. The magnetically-actuated mirror achieves a large tilt angle. The tilt angle of the concave micromirror of the cay´s eye retroreflector can change from 0° to 12°, with the retroreflection efficiency varying from 19% to 5%.
Keywords :
"Magnetic resonance imaging","Optical reflection","Mirrors","Magnetic domains","Optical imaging","Optical scattering","Micromechanical devices"
Conference_Titel :
Optical MEMS and Nanophotonics (OMN), 2015 International Conference on
Print_ISBN :
978-1-4673-6834-6
Electronic_ISBN :
2160-5041
DOI :
10.1109/OMN.2015.7288848
