FIELD: medical engineering. SUBSTANCE: device has photometric cavity provided having movable cover with a surfaces having diffuse reflection coefficient Krefl equal to 100% in main outlet aperture to enable one to calibrate the cavity. Photoelectric transducer connected to recording unit is mounted in auxiliary outlet aperture. The recording unit has amplifier and the first and the second differential amplifiers. A differential amplifier has controlled resistor in its feedback circuit. The unit has digital- to-analog converter, the first and the second analog-to-digital converters, the first and the second clock pulse generator, the first and the second digital counters. Digital display is mounted at the exit from the unit. Links set among the device- and recording unit elements enable one to model photoelectric transducer responses to introducing cover surface having Krefl equal to 100% into the cavity and removing the cover for creating Krefl=0% conditions in the unit and saving the response data in the recording unit. EFFECT: high accuracy of measurements. 1 dwg
