Abstract
A new type of amplitude-modulated (AM) reticle constructed by a liquid crystal (LC) cell array finds an excellent application in remote sensing for a flow velocity with unpredictable variation of speed and direction. The LC-AM reticle is a spatiotemporal spatial filter, optoelectrically achieved by using the consequent opaqueness due to the LCs dynamic scattering caused by the electric field sequentially applied to the respective LC cell. A feasibility test for the sensor with a pair of these reticles has measured the flow-velocity vector of a river.
© 1981 Optical Society of America
Full Article | PDF ArticleMore Like This
James E. Stewart
Appl. Opt. 20(4) 654-659 (1981)
Paul E. Mengers and Kathryn B. O’Brien
J. Opt. Soc. Am. 54(5) 668-671 (1964)
Stephen T. Kowel, Dennis S. Cleverly, and Philipp G. Kornreich
Appl. Opt. 23(2) 278-289 (1984)