FIELD: measurement technology, adjustment and test of induction electricity meters, remote measurement of electric energy consumption. SUBSTANCE: photoregister of moving mark has illuminator, optical focusing system, photodetector, signal processing unit and generator of rectangular pulses connected to illuminator and signal processing unit. Characteristic feature of photoregister consists in that its optical focusing system comes in the form of at least one spherical lens. In this case illuminator, spherical lens and photodetector are placed in sequence on single optical axis so that spherical lens secures transmission of light signal from illuminator to tested object escaping photodetector and light signal reflected from tested object hits directly photodetector along same optical axis in backward direction. Illuminator comes in the form of point radiator. EFFECT: simplified design and enhanced reliability of registration and operational stability of photoregister. 2 dwg
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