Patent ID: 7365843

Claim:
Spectral photometer, comprising a measuring head equipped with an illumination arrangement including at least one light source for the illumination of a measured object at an angle of incidence of 45° and located in a measurement plane, a pickup arrangement for capturing the measurement light remitted by the measured object at an angle of reflection of essentially 0° relative to the perpendicular to the measurement plane, a spectrometer arrangement including an entry aperture for the spectral splitting of the measurement light captured and fed through the entry aperture, a photoelectric receiver arrangement exposed to the split measurement light for conversion of the individual spectral components of the measurement light into corresponding electrical signals, and an electronic circuit for control of the light source and forming digital measurement values from the electrical signals produced by the photoelectric receiver arrangement, the at least one light source being constructed as a cosine emitter and located in such a way that its main radiation direction is essentially parallel to the main beam of the remitted measurement light and the mean distance of the light source from the main beam of the remitted measurement light being essentially the same as the distance of the light source from the measurement plane.