Patent ID: 7623278
Filing Date: 2009-11-24
Classification: G01J,H04N

Abstract:
1. A method of calibrating a marking engine that includes a photoreceptor transfer device having at least a first area on a surface of the photoreceptor transfer device, the at least first area receiving at least one color of marking material that is an image, the photoreceptor transfer device conveying the marking material to at least one of another transfer device or an output substrate, the method comprising: configuring Fabry-Perot cells within a Fabry-Perot array to form a desired light filter pattern; disposing at least one toned patch in a second area of the photoreceptor transfer device, the second area being different from and not overlapping the first area and the second area being disposed at a margin area located on the surface of the photoreceptor transfer device; transferring the at least one toned patch or the image to the output substrate; illuminating the at least one toned patch or the image on the output substrate; filtering light reflected from the at least one toned patch or the image through the Fabry-Perot array; measuring the filtered light received from different Fabry-Perot cells within the Fabry-Perot array to obtain measured spectral information values for the at least one toned patch or the image in response to the illumination; and performing a color calibration of the marking engine for use in a marking operation based on the measured spectral information values.