H - Electricity – 04 – N
Patent
H - Electricity
04
N
198/3, 350/9
H04N 1/04 (2006.01) H04N 1/047 (2006.01) H04N 1/10 (2006.01) H04N 1/12 (2006.01)
Patent
CA 1169957
-11- ABSTRACT OF THE DISCLOSURE "AN ARRANGEMENT FOR SCANNING ORIGINALS PROVIDED WITH GRAPHIC PATTERNS" An arrangement is disclosed for scanning an original provided with a graphic pattern along a plurality of scanning lines using an opto-electronic scanning device carried by a carriage which can be moved over the original along the scanning lines, in which lack of correlation between the position of the carriage and that of image points on the scanning lines due to slipping or elasticity of the carriage drive means is overcome. This is effected by providing the carriage with a first scanner (preferably opto-electronic) arranged to scan marks on a synchronising scale when the carriage is moved along a scanning line, the signals from the scanner being arranged to control a drive motor for the carriage. Similarly, a second scanner is arranged on a carriage guide on which the carriage runs and which is itself movable in a direction normal to the scanning lines so as to scan marks on a second synchronising scale, the signals from this scanner serving to control a motor for the stepwise driving of the carriage guide.
375281
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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