Patent Document ID: 7498578
Application ID: 10899810
Patent Status: 1

Claim One:
1. A method for calibrating a densitometer in a digital reproduction system including: generating a series of image panels with toner patches of incrementally increasing densities on a photoreceptor medium, obtaining specular readings and diffuse readings for light reflected from the photoreceptor medium and the toner patches, computing specular developed mass per unit area (DMA) values with reference to a reflected ratio of a difference between each specular reading and a solid toner patch specular reading to a difference between a specular reading for a clean photoreceptor medium and the solid toner patch specular reading; and determining a functional relationship between the computed specular DMA values and the diffuse readings corresponding to the specular readings used to compute the specular DMA values so that coefficients of the functional relationship may be used to later determine diffuse DMA values for a reproduction system.