Registers – Coded record sensors – Particular sensor structure
Patent
1975-05-14
1977-03-15
Smith, Alfred E.
Registers
Coded record sensors
Particular sensor structure
235181, 333 30R, 350 96WG, H03H 926, H03H 932, G02F 111, G06F 756
Patent
active
040121208
ABSTRACT:
An acousto-optic device suitable as a correlator, convolution integrator or Fourier transform device. The device comprises a piezoelectric substrate or crystal such as lithium niobate. The substrate is covered by a thin, outer layer having higher index of refraction than the substrate and a thickness on the order of 50 micrometers. Two acoustic transducers such as interdigital transducers are disposed on opposite ends of the crystal to launch two acoustic surface waves in opposite directions. A laser beam is guided through the outer layer and is coupled with the two acoustic waves to generate either a correlation function, a Fourier transform or a convolution integral depending on the signals impressed thereon.
REFERENCES:
patent: 3633995 (1972-01-01), Lean et al.
patent: 3655261 (1972-04-01), Chang
patent: 3736044 (1973-05-01), Lean
Lean-"Optical Correlation and Heterodyne Detection of Compressed Pulses" in IBM Technical Disclosure Bulletin, Jan. 1969; pp. 899-901.
Tao-`Dynamic Control of Laser Deflection by Acoustic Surface Waves` in IBM Technical Disclosure Bulletin, Nov. 1970; p. 1603.
Hall David B.
Kagiwada Reynold S.
Connors John J.
Nussbaum Marvin
Nyhagen Donald R.
Oser Edwin A.
Smith Alfred E.
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