Patent ID: 9678253
Date: 2017-06-13
CPC Classifications: C01B,G02B,H01L

Claim:
1. A manufacturing method of a Blazed diffraction grating configured to diffract incident light and made of a CdTe or CdZnTe crystal material, the manufacturing method comprising the step of: forming a plurality of grating grooves in a processed surface of a work through machining to form the Blazed diffraction grating, wherein each of the plurality of gratings has a short side surface and a long side surface that intersect each other to constitute one of the plurality of grating grooves, each of the short side surface and the long side surface extending along a groove direction of the plurality of grating grooves, the groove direction being different from a Blazed direction, wherein the short side surface has a short side of a triangular sectional shape on a section that contains the Blazed direction, wherein the long side surface has a long side, which is longer than the short side, of the triangular sectional shape on the section, and wherein one of the short side surface or the long side surface is a (110) plane of the crystal material.