Purpose:
- It is the main optical element for the extraction of a given wavelength in various spectral optical devices, such as monochromators and spectrographs, which are intended for scientific research and production needs.
- Spatial spectral filtration of radiation.
- The element of the laser cavity.

Technologies used:
- Technology of manufacturing by a method of cutting by a diamond cutter on a high-precision dividing machine with interference control.
- Technology of vacuum deposition of reflective metal coatings.
- Technology of copying diffraction elements using polyester resins.

Benefits:
- High diffraction efficiency.