Optoelectronic means for one-dimensional integral transforms of

Details Optoelectronic means for one-dimensional integral transforms of Optoelectronic means for one-dimensional integral transforms of

1975-12-04

1977-04-05

Gruber, Felix D.

Registers

Transfer mechanism

Traveling pawl

324 77C, 324 77K, 350314, G06G 900, G02B 520

Patent

active

040164136

ABSTRACT:
The invention concerns an analog TV-type process and apparatus for rapid cessing of pictorial information. A transparency is rapidly scanned by a line of light source, scanning of which is controlled by conventional electronic means. The light output is applied to an image converter tube and the output thereof applied in line by line sequence to a transmissive plate. The plate has parallel strips with transmittivities determined by the operation to be performed, such as biased sines or cosines for a Fourier transform. A line of the picture on the transparency is projected successively on all the transmissive strips. The total amount of light output of each strip of the plate is applied to a photomultiplier tube. The coefficients of the Fourier transform are obtained from the difference between the photomultiplier output after illumination of a line of the transmissive plate and a stored signal which specifies the bias level.

REFERENCES:
patent: 2774814 (1956-12-01), Perilhou et al.
patent: 3204248 (1965-08-01), Alexander
patent: 3286083 (1966-11-01), Nielsen
patent: 3358149 (1967-12-01), Preikschat
patent: 3441724 (1969-04-01), Taylor, Jr.
patent: 3486016 (1969-12-01), Faiss
patent: 3768907 (1973-10-01), Williams

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