Spectrophotometer with wavelength calibration.

摘要

Photometer having a variable wavelength comprising at least one light source, a monochromator having an adjustable wavelength, a sample position and a detector which detects the substantially monochromatic radiation obtained from the light source via the monochromator and the sample position. Furthermore, the photometer comprises a rotatable disc located in the light path and provided with angle position indication means by means of which it is possible to determine from the instant values of the detector signal the segment of the disc that has affected the radiation giving rise to the instant values in question.