Share Email Print
cover

Proceedings Paper

Usage of liquid crystals in optical sensors of mechanical forces and motion
Author(s): Sergey V. Pasechnik; Dina V. Shmeliova; Valentin A. Tsvetkov; Aleksandra V. Torchinskaya; Vladimir G. Chigrinov
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Physical backgrounds for highly sensitive optical sensors of mechanical perturbations based on flow phenomena in liquid crystals are presented. It is shown that linear declinations of the optical axis of a nematic liquid crystal induced by a pressure gradient from the initial homeotropic orientation which are registered via polarized light can be considered as the basic mechanooptical effect for sensor applications. The ways of optimization of technical characteristics of liquid crystal sensors including usage of electric fields are discussed. The examples of sensors of acceleration, vibration and inclination based on the same principals are considered. It is shown that usage of liquid crystals provides an extremely high threshold sensitivity and electric control of the main technical parameters of optical sensors.

Paper Details

Date Published: 18 May 2009
PDF: 9 pages
Proc. SPIE 7356, Optical Sensors 2009, 73561M (18 May 2009); doi: 10.1117/12.820611
Show Author Affiliations
Sergey V. Pasechnik, Moscow State Univ. of Instrument Engineering and Computer Science (Russian Federation)
Hong Kong Univ. of Science and Technology (Hong Kong, China)
Dina V. Shmeliova, Moscow State Univ. of Instrument Engineering and Computer Science (Russian Federation)
Valentin A. Tsvetkov, Moscow State Univ. of Instrument Engineering and Computer Science (Russian Federation)
Aleksandra V. Torchinskaya, Moscow State Univ. of Instrument Engineering and Computer Science (Russian Federation)
Vladimir G. Chigrinov, Hong Kong Univ. of Science and Technology (Hong Kong, China)


Published in SPIE Proceedings Vol. 7356:
Optical Sensors 2009
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

© SPIE. Terms of Use
Back to Top