Patent ID: 6760475
Filing Date: 2004-07-06
Classification: G01J,H04N

Abstract:
An imaging system that obtains the colorimetric value of a plurality of points in a scene when the scene is lit by a source of illumination, comprising:an imaging detector, imaging optics that receive light from the scene and direct it to the detector, a tunable filter that is disposed at one of a position between the source of illumination and the scene, a position between the scene and the imaging optics, and a position between the imaging optics and the detector, said tunable filter responsive to applied electrical signals that filters the spectrum of light passing therethrough, and a control circuit for acquiring and storing a plurality of images from the detector while the tunable filter expresses a plurality of predetermined filter response functions in response to applied electrical signals, and determining the colorimetric values from the stored images, wherein each of the filter response functions has substantial transmission at a plurality of wavelengths.