| 摘要 |
1. In a bank note validator having means for determining the validity of the bank note and for accepting and rejecting the bank note, a system for determining the color correctness of said bank note comprising, a light detector for sensing the admission of red, green, blue, and infrared light respectively from said bank note, A/D means for converting the output of said light detector into a digital signal, means for selectively limiting the output gain of said A/D means to obtain an output signal indicative of selected one of said color, and means for providing said output signal to the means for determining validity of the bank note. 2. The system according to claim 1 including means interposed between said sight detector and said A/D converter means. 3. The system according to claim 1 wherein said limiting means comprises an amplifier and a microprocessing unit for programmably controlling the gain of the amplifier to provide selected frequency levels of output. 4. The system according to claim 1 wherein said light detection means comprises an array of light detection photodiodes each being preset for respective one of said colors. |
