Hi Andreas,
"All began from study of bibliography 1950-1960 and a Russian manufacture (amazing for me)."
Semyon Davidovitch Kirlian ?
...
from a website out here
"Kirlian Photography is a process of recording the corona discharge between a subject (in this case a human finger) and a high voltage, low current electrode. In 1961, Semyon Davidovitch and Valentina Kirlian published a paper in the Russian Journal of Scientific and Applied Photography where they described the process now called Kirlian Photography."
If your system uses corona effects it's a "kirlian-LRL"!

or not ?
Best regards,
Max