An investigation of cholesteric liquid crystals as square-law detectors for recording ultrasonic holograms
Date
1972
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Cholesteric liquid crystals were applied to a polyethylene membrane to form a liquid crystal ultrasonic detector (LCUD). The LCUD was used to thermally map ultrasonic fields and to record ultrasonic holograms. An analysis of the thermal response of the membrane to a sinusoidal heating function was performed to determine the resolution of the LCUD when used to map interference patterns. An investigation was made of the hologram transmittance as a function of ultrasonic intensity and experimentally verified.