Accession Number : AD0438036

Title :   ORTHOGONAL ULTRASONIC SIGNALS,

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Henry,E. E.

Report Date : APR 1964

Pagination or Media Count : 12

Abstract : An ultrasonic light modulator is one good means of introducing an active signal into a beam of light for computing purposes. A light modulator has been constructed with two quartz crystals as the transducers, each with its own electronic driver. The crystals are mounted in two sides of the unit so as to produce two orthogonal ultrasonic wave trains with a common area of interaction. Water is used as the delay medium. The modulator cell is mounted in an optical system with the light beam normal to the plane of the ultrasonic axes, so that the diffraction patterns produced as the crystals are energized, both singly and simultaneously, are visible. Amplitude modulation is introduced as well as the pure resonant frequency wave. (Author)

Descriptors :   (*ULTRASONIC RADIATION, SIGNALS), (*LIGHT, MODULATION), (*SIGNALS, ULTRASONIC RADIATION), OPTICAL COMMUNICATIONS, OPTICAL EQUIPMENT, TRANSDUCERS, DIFFRACTION, ANALOG COMPUTERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE