FIELD: instrument making.
SUBSTANCE: photometer contains at least two photodiodes, blocks of amplification, recording and processing of the photodiode signals, the current or voltage source, the optical system for the radiation flux concentration, the switcher, allowing one or more photodiodes connections to the source, and the rest photodiodes to the amplification blocks. In such a case, at least one of the photodiodes is peformed with the active area, based on the direct-band-gap semiconductor and optically connected with at least one of the photodiodes, sensitive to the radiation with the photon energy, proportional to the bandgap width value of direct-band -gap semiconductor.
EFFECT: improved accuracy and reliability.
10 cl, 13 dwg
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