COLORIMETER HAVING FIELD PROGRAMMABLE GATE ARRAY

摘要

A colorimeter capable of calibrating color monitors, is provided by a photometric array of photodetectors (38) and opticlal filter pairs (50). The filters include long-pass, edge filters which cover overlapping regions at t he upper end of the visible spectrum and a filter which covers the entire visib le spectrum. The outputs of the photodetectors are digitally synthesized to provide a response which mimics the response established by the Commission Internationale de l'Eclairage (CIE) xyz (bar) functions almost perfectly. Th e response which is mimicked may be represented by the CIE color matching functions. The pairs and the associated components are mounted on a printed circuit board (32) captured in a clamshell housing and having an array of apertures which define angularly constrained fields of view of a surface fro m which the light emanates.