Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1975-06-12
1976-09-28
La Roche, Eugene
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
144312, 250223R, 250561, 250571, 356157, G01N 2122
Patent
active
039834034
ABSTRACT:
A method and apparatus for optically scanning a board having at least one wane, comprising illuminating the board from at least one side in a direction substantially parallel to a sawn planar face of the board, receiving light reflected by the wane by an objective, and forming, by means of the objective images of at least the terminal parts of selected illuminated transverse zones of the board substantially in the image plane of the objective, placing a plurality of photosensitive elements generating electrical signals in proportion to the light received substantially at the image plane of the objective, forming the photosensitive elements as one rectilinear array of photosensitive signal generators oriented in the direction of the image of the illuminated transverse zone, and moving at least one of the objective and the array of generators relative to the board such that the point of intersection of the imaging axis of the objective and the board scans the board in the longitudinal direction thereof whereby images of different transverse zones of the board are consecutively formed on the array of signal generators.
REFERENCES:
patent: 3513321 (1970-05-01), Sherman
patent: 3806253 (1974-04-01), Denton
patent: 3890509 (1975-06-01), Maxey
Bang Borje
Dahlstrom Claes
Tannerstal Harding
La Roche Eugene
Rema Electronic Ltd.
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