Datacolor Holding Ag

Colorvision Administrative Ag

Applied Color Systems, Inc.

David Slocum

Cormic K Merle

Colman F Shannon

Michael Vhrel

Jay M Eastman

Roger J Greenwald

William J Fox

John A Boles

Michael H Brill

Michael J Vrhel

Alan Ingleson

Brian Levey

Joseph M Reed

Robert J Hutchinson

Justin R Louise

Brain J Levey

Robert G Cathcart

A tristimulus colorimeter on a single semiconductor chip having at least three detectors, each detector being coated by colorant filters, each filter having at least one layer and at least one filter having a double layer is provided. The colorimeter determines CIE tristimulus values of an incident light from inputs to the filters and detectors. Colorimeters having integral dye filters may be constructed on a single silicon chip embodying all the detectors and electronics, coated over each detector by a deposited filter layer. Colorants may be directly deposited on the detectors, rather than using a plastic substrate for a filter.

Tristimulus colorimeter having integral dye filters

A method for determining the optimal colorant thicknesses and linear combinations for integral illuminant-weighted CIE color-matching filters is provided. A reflectance colorimeter for configuring printers may be designed using this method.

Method for designing a colorimeter having integral illuminant-weighted CIE color-matching filters

A tristimulus colorimeter for measuring reflective or transmissive materials is provided. The colorimeter measures a sample under a calibrated light source, receives inputs to detectors, and determines CIE tristimulus values of the same sample as they would occur under a reference light source. The colorimeter includes a calibrated light source and a single silicon chip that includes three or more detectors. Each detector is permanently coated by a different mix of dyes or other colorants that form a wavelength-selective filter. A single silicon chip embodies all the detectors and electronics, with each detector coated over by deposited filter layers.

Reflectance sensor for integral illuminant-weighted CIE color matching filters

A method for determining the optimal colorant thicknesses for integral CIE color-matching filters is provided. According to a computational study, a four band filter of the present invention provides a best approximation to the CIE XYZ color-matching functions with the least cost.

Method for designing a colorimeter having integral CIE color-matching filters

Systems, methodologies, media, and other embodiments associated with color measuring are described. One exemplary system embodiment includes a spectrophotometer, one or more light sources for illuminating an interior of the spectrophotometer, and a digital camera configured at a port of the spectrophotometer and being configured to measure light components from a sample. In the present invention, segmentation logic is provided for the spectrophotometer that is configured to employ computational image segmentation to characterize specular reflection from a sample and to characterize a selected patch or portion from the test sample, such as a selected color in a multicolor pattern. In accordance with the present invention, the spectrophotometer and the included digital camera may be color-characterized in situ.

Spectrophotometer with digital camera

A symmetric monitor calibrator for mounting on a cathode ray tube or monitor with a surface. The calibrator has a case that holds electronic and optic components. Suction cups hold the calibrator to the surface, in which the suction cups are attached to the end of supporting elements that surround the case. At least three supporting elements with a common connecting point to form one support structure are connected to the top of the case. The supporting elements extend out creating a greater diameter than the case. The supporting elements and therefore suction cups uniformly surround the center point of the case to prevent rotation caused by the effects of gravity.

Monitor calibrator

A colorimeter capable of calibrating color monitors, whether having cathode ray tube or liquid crystal (LCD) displays, is provided by a photometric array of photodetector and optical filter pairs. The filters include long-pass, edge filters which cover overlapping regions at the upper end of the visible spectrum and a filter which covers the entire visible spectrum. The outputs of the photodetectors are digitally synthesized to provide a response which mimics the response established by the Commission Internationale de 1&prime;Eclairage (CIE) xyz (bar) functions almost perfectly. The 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 captured in a clamshell housing and having an array of apertures which define angularly constrained fields of view of a surface from which the light, to be colormetrically analyzed, emanates. The printed circuit board includes a field programmable gate array programmed to read data from the plurality of filter/detector pairs in parallel. The colorimeter is capable generally of measuring the color characteristics, especially the color temperatures of radiation radiating and reflecting bodies (sources), including so-called black bodies.

Colorimeter having field programmable gate array

Monitor calibration device

Portable spectrophotometer

Growing community of inventors

Yardley, PA, United States of America

David Slocum