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Self Adjusting Optical Document Sensors Disclosure Number: IPCOM000056390D
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-14

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LaFalce, RA [+details]


This system automatically compensates for dust buildup and the different amplification factors of unmatched light-emitting diodes and photo transistors. Compensation is accomplished by frequently and automatically adjusting the LED output using a plurality of counters and D to A converters. Adjustment is initiated following initial program load and at any time from the operator's console.