Registers – Coded record sensors – Particular sensor structure
Patent
1977-02-18
1980-03-11
Canney, Vincent P.
Registers
Coded record sensors
Particular sensor structure
235455, G06K 710, H04M 538
Patent
active
041924525
ABSTRACT:
A television camera for picking up a bar coded label is controlled to produce scanning lines contacting each other as by halving its vertical sync frequency, producing an elliptical beam, alternating narrow beams with wide beam, or utilizing wobbling technique. Also a raster formed of the scanning lines is stepwise rotated by a pulse motor. Alternatively a pair of horizontal and vertical deflection coils disposed in quadrature relationship with the other pair of similar coils are supplied with sawtoothed deflection currents varying in amplitude at predetermined equal intervals and in quadrature relationship with similar current supplied to the other coil pair. For spaced scanning lines, a video signal from the television camera affected by its after-images is blocked by a gate. Alternatively, the signal is subtracted from a video signal due to the preceding scanning line correlative to the same to remove the effect of the after-images.
REFERENCES:
patent: 3499109 (1970-03-01), Kihara et al.
patent: 3678195 (1972-07-01), Dillenburger
patent: 3683108 (1972-08-01), Pieters
patent: 3873812 (1975-03-01), Stein et al.
patent: 3969612 (1976-07-01), McJohnson
patent: 3988573 (1976-10-01), Hayosh et al.
patent: 4044227 (1977-08-01), Holm et al.
Hashimoto Tsutomu
Nakamura Nobuhiro
Adams Bruce L.
Burns Robert E.
Canney Vincent P.
Loboto Emmanuel J.
Mitsubishi Denki & Kabushiki Kaisha
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