Title :
Small angle measurement by use of a nonlinear optical feedback system
Author :
Yuasa, Y. ; Hayasaki, Y. ; Yamamoto, H. ; Nishida, N.
Author_Institution :
Dept. of Opt. Sci. & Technol., Tokushima Univ., Japan
Abstract :
An optical pattern formed spontaneously in a nonlinear optical feedback system is composed of an optically addressable spatial light modulator and optical feedback flows due to lateral wave-front shift of the feedback light We propose to use this phenomenon to measure a small angle, because a rotation of the mirror produces the shift. We demonstrate the dependency between pattern speed and rotation angle.
Keywords :
angular measurement; nonlinear optics; optical feedback; optical variables control; spatial light modulators; lateral wave-front shift; mirror rotation; nonlinear optical feedback system; pattern speed; rotation angle; small angle measurement; spatial light modulator; spontaneous optical pattern formation; Goniometers; Image motion analysis; Mirrors; Nonlinear optics; Optical feedback; Optical filters; Optical interferometry; Optical modulation; Optical sensors; Rotation measurement;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195188
