METHOD OF MAKING DIFFRACTION GRATING Russian patent published in 2012 - IPC G02B5/18 

FIELD: physics, optics.

SUBSTANCE: invention relates to optics and specifically to diffraction grating-type optical elements and is meant for producing said elements. The method of making a diffraction grating involves forming alternating layers of two substances of different permittivity. Layers of these two substances are formed by parallel winding of two bands of different materials, one having light-reflecting properties while the other does not, onto an elongated plate along its length to enable formation of a plane in circumferential winding - by winding the band on that plane, and/or cross cutting the layer of the wound band on the plane, and/or cross polishing on the plane of the layers of the wound band.

EFFECT: simple process of making a diffraction grating.

1 dwg