Abstract: Theoretical analysis of holographic grating and a new experimental system of high quality holographic gratings are presented based on the important station of holographic gratings in the information optic and spectrometer. The predominance of this experimemal system lies in that the Gaussian light beams coming from the laser can be changed into uniform plane light wave and used as a source for making high quality holographic gratings.

Key words: holographic gratings, raster constant, Gaussian light beam, uniform plane light wave