A sensor assembly and an optical image color scanner using the sensor assembly. The sensor assembly is of the type having three separate rows of optical sensors. Two of the three sensor rows have color filters and one is unfiltered (receptive to white light). For gray scale scanning, only the unfiltered...http://www.google.com.au/patents/US5773814?utm_source=gb-gplus-sharePatent US5773814 - Sensor assembly providing gray scale and color for an optical image scanner 
