STATE-OF-THE-ART OPTICAL-ACOUSTIC DETECTORS

Papers on selective and nonselective optical-acoustic detectors are re viewed. Receivers for measuring scattered and pulsed infrared radiatio n are described. Diagrams and characteristics of detectors for determi ning the thermal properties of solid bodies, and the surface and volum e absorption coefficients are given. A diagram and characteristics of the raster thermal-wave method of determining small infrared absorptio n coefficients of solid bodies are given.