Direct electronic fourier transforms of optical images

Details Direct electronic fourier transforms of optical images Direct electronic fourier transforms of optical images

1977-01-21

1978-07-04

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

3401463F, 356 71, 250211R, H04N 314, G06K 902, H01L 3108

Patent

active

040992071

ABSTRACT:
Method and apparatus for directly converting between optical images and the spatial Fourier transforms of optical images by interacting sound waves and light. Controlled sound waves couple with optical images, and electrical signals may be derived from this coupling which are functions of the spatial Fourier transforms of the entire optical images. In a reverse process, optical images are obtained directly by coupling controlled sound waves with electrical signals which are a function of the spatial Fourier transforms of the optical images and with light.

REFERENCES:
patent: 2560168 (1951-07-01), Goldsmith
patent: 3836712 (1974-09-01), Kornreich et al.
patent: 4040091 (1977-08-01), Kornreich et al.

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