G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/25 (2006.01) G01J 3/10 (2006.01) G01J 3/50 (2006.01) G01N 21/27 (2006.01) G01N 37/00 (2006.01)
Patent
CA 2412589
A spectrophotometer includes an optical measurement head (100), a spectrometer (200) and a control electronic (300). The measurement head is equipped with a multi-channel illumination arrangement which includes exclusively light emitting diodes (13) as spectrally continuous light source. Each illumination channel (11) includes a light emitting diode (13), whereby each light emitting diode is separately controllable. The measurement head includes further a preferably telecentrically constructed collecting channel (12) for the capturing of the measurement light remitted or emitted by the sample and for the coupling of the same into the spectrometer (200). The illumination channels (11) are positioned in a circle around the optical axis of the measurement head (100) and illuminate the sample under different angles of incidence. The measurement head includes at least one white light emitting diode and additionally light emitting diodes with different imaging spectra as well as UV light emitting diodes. In combination with the control electronic, an illumination with electronically adjustable spectral characteristics is hereby realized. For a contact-free measurement, means for the determination of the measurement distance and a distance dependent numerical correction of the measurement data is provided. The spectrophotometer can be constructed very compact and allows a versatile use on all input and output media involved in a color management system. The spectrophotometer is especially also usable as a built- in device or measurement sensor in automated color measurement systems or directly in color printing systems. The spectrophotometer is especially suited for the measurement of both color as well as material and color reproduction properties and effect color layers, and permits the formation of device profiles of the most different type from the measurement results, to enable in such a way an exact visualization of the color reproduction properties of a manufacturing process.
Borden Ladner Gervais Llp
Gretag-Macbeth Ag
LandOfFree
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