Credit card validation system using an optical reader employing reflected light

摘要: Hereinafter disclosed is methodology and apparatus for optically reading, or recognizing, numbers on such articles as credit cards the like. According to one illustrative embodiment of invention a card having an identifying number, account consisting plurality decimal digits illuminated by source light. Reflected light from face directed through lens projected mask which has unique hole patterns therein. The reflected considerably darker than other portions card. There provided in individual pattern, array, holes each digit''s Each pattern associated therewith photodetector. Hence, corresponding photodetectors. For 0 9 nonilluminated (or dark) photodetectors results. This dark provides set signals are representative particular digit whose been mask. Ultimately, sets representing all delivered comparator purpose determining whether not number corresponds like stored suitable storage means; said also being comparator.