公开(公告)号：EP1040329A1

公开(公告)日：2000-10-04

申请号：EP98966020.4

申请日：1998-12-18

Applicant: CHROMATICS COLOR SCIENCES INTERNATIONAL, INC.

Inventor： Macfarlane, Darby S. ,  Macfarlane, David K. ,  Billmeyer, Fred W., Jr.

IPC: G01J3/52

CPC classification number: G01J3/52 ,  G01J3/0272 ,  G01J3/524

Abstract: Methods and apparatus for calibrating a color measuring instrument with a color standard and verifying the color standard and calibration are provided. One method includes providing a color standard having a surface with at least two different colors (preferably arranged for a simultaneous color measurement), calibrating the instrument, and verifying that said color standard is an authorized color standard of a predetermined specification and that the calibration of the color measuring instrument has achieved predetermined specified results. Some of the provided methods and apparatus use a photosensitive portion of the color standard that changes color in a known way when exposed to a predetermined dose of light. Various color standards for use with this invention are provided.