Recording scheme in counterbeams for obtaining relief-phase holographic gratings working in transmission

The article presents the results of experiments on recording thin transmission relief-phase gratings in counter beams. Holographic gratings with a spatial frequency of up to 800 mm$^{-1}$ were produced on PFG-01 photographic material, the processing technology of which includes tanning bleaching in bleaches containing dichromates, UV irradiation and etching in solutions of glacial acetic acid in isopropyl alcohol. The key point in the processing technology is the destructive effect of short-wave UV radiation with a wavelength of less than 270 nm on the gelatin of the photo emulsion. In the course of the experiments, transmission relief-phase holographic gratings were obtained.