As a light receiver we used photomultiplier, type FEU-140. Interferential light filters can be installed from a set with an optical range of 240 - 600 nm with an interval of 10 nm for studies in the narrow spectral range of emission. Analogous electric signals from the photoreceiver output enter the input of the amplifier being enhanced to the value necessary for transforming and entering into high-speed buffer storage. A control device equipped with a light shutter opens it during recording photoreceiver signal acquisition, while a clearance device clears the working surface of the glass during intervals between measurements. Temperature stabilization of the photoreceiver is achieved by the thermal stabilization block.
Power supply is provided by a high voltage source with high stability.
The control unit monitors the stability of sample pressing against probe. After start ADC realizes transformation of a sensor signal to a digital code. The activation of ADC and reading of an information by the computer is executed only for want of availability of a signal measurement . For better use of PC the timer is set in the control unit. On completion of measuring cycle and information storage in RAM, the PC begins information processing.