Basically, a spectrometer is an optical system consisting of two lenses/mirrors that produces an image of the input slit on the detector. In between the lenses/mirrors is placed a diffraction grating which disperses different wavelengths in different angles. An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument. The basic measurement principle used by a spectrophotometer is relatively simple and easy to understand. 1, first the intensity of the measurement light beam, I 0, is measured without the. Two kinds of lamps, a Deuterium for measurement in the ultraviolet range and a tungsten lamp for measurement in the visible and near-infrared ranges, are used as the light sources of a spectrophotometer. Types and properties of light source A continuous spectrum of 300 - 3,000 nm is emitted. Figure 1: Components of a spectrophotometer: Light emitted from the source. An optical spectrometer, like the Ossila USB spectrometer, is the most common type.
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