| US 7,456,955 B2 | ||
| Spectrophotometer with light emitting diode illuminator | ||
| Alan Ingleson, Newbury (United Kingdom) | ||
| Assigned to Datacolor Holding AG, Lucerne (Switzerland) | ||
| Filed on Mar. 08, 2006, as Appl. No. 11/371,839. | ||
| Claims priority of provisional application 60/661376, filed on Mar. 14, 2005. | ||
| Prior Publication US 2006/0203240 A1, Sep. 14, 2006 | ||
| Int. Cl. G01J 3/42 (2006.01) | ||
| U.S. Cl. 356—319 | 19 Claims |
| 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.
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