G - Physics – 06 – F
Patent
G - Physics
06
F
350/32, 354/56
G06F 9/00 (2006.01) G06K 7/10 (2006.01)
Patent
CA 1084165
ABSTRACT OF THE DISCLOSURE 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 coil disposed in quadrature relationship with the other pair of similiar 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 proceding scanning line correlative to the same to remove the effect of the after-images. - 1 -
272229
Hashimoto Tsutomu
Nakamura Nobuhiro
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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