Patent 7385701 was granted and assigned to Konica Minolta on June, 2008 by the United States Patent and Trademark Office.
A standard plane sample which supplies an optical characteristic measuring device with reference data. The standard plane sample including a sample portion that is measured by the optical characteristic measuring device to supply measurement data, and a recording medium that stores identification data for identifying a kind of the sample portion as well as reference data corresponding to the optical characteristic of the sample portion.