Patent ID: 7456955
Filing Date: 2008-11-25
Classification: G01J

Abstract:
1. A spectrophotometer for characterizing a reflectance spectrum of a specimen, the spectrophotometer comprising: an optical assembly for illuminating specimen, the optical assembly comprising at least one light emitting diode and a fiber optic pigtail coupled to said at least one light emitting diode, said fiber optic pigtail comprising a plurality of bundles of optical fibers, each of said plurality of bundles sharing a common end and additionally having one free end that is independent of a remainder of said plurality of bundles; a measurement head coupled to said optical assembly for collecting light reflected by said specimen; a spectrum analyzer coupled to said measurement head for performing spectral analysis of said light into a plurality of spectral bands; a reference channel for providing illumination from said optical assembly to said spectrum analyzer; and a test channel for providing said light from said measurement head to said spectrum analyzer.