An examination is made of the principles of optophysical measurements and of the structure of optoelectric conversion. The functions of the All-Union Scientific-Research Institute for Optophysical Measurements (VNI- IOFI), as the principal scientific metrological center, are described and the current and prospective funda- Mental problems in the field of optophysical measurements are briefly characterized. Particular attention is Devoted to photometric and radiometric standards utilizing a high-temperature black-body model, to the prob- Lems of the remote transfer of the sizes of units, and to creating a common standard for the units of power and Energy for different branches of physics.
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