Patent ID: 6891180

Claim:
A camera system for processing documents for measurement of reflectance and/or transmittance of documents, including a first camera assembly comprising: a first illumination device for illuminating a document traversing an object plane, and including a first light source and a first mirror assembly associated with the first light source for directing light emitted by the first light source onto the document; a first optic for imaging light reflected and/or transmitted by the document onto an image plane; a first detector disposed in the image plane; wherein the first mirror assembly is disposed around the first detector and the first light source, the first light source comprises an LED array, and the first optic is formed for 1:1 image transfer of the illuminated place on the document onto the first detector; wherein the first detector, the first light source and the first optic are positioned to permit uninterrupted transmission of light reflected by the first mirror assembly onto the document.