Acoustro-electric scanner by phonon echo phenomenon

Details Acoustro-electric scanner by phonon echo phenomenon Acoustro-electric scanner by phonon echo phenomenon

1975-12-29

1978-04-11

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

310313, 310334, H04N 314

Patent

active

040841898

ABSTRACT:
A thin film optical scanner using phonon echoes. A piezoelectric (an insulator or a semiconductor) crystal has deposited thereon a photoconductor. An acoustic transducer propagates a broad strain wave pulse guided in or on the crystal. A relatively shorter electric field pulse is coupled to the piezoelectric crystal through the photoconductor which has an optical signal focused thereon. The interaction of electric field and strain wave produce a backward travelling acoustic wave which is modulated by the optical signal.

REFERENCES:
patent: 3826865 (1974-07-01), Quate et al.
patent: 3903364 (1975-09-01), Lean
patent: 3944732 (1976-03-01), Kino
patent: 3970778 (1976-07-01), Adkins

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