DIFFRACTION GRATING AND PRODUCTION METHOD THEREFOR

摘要

A high-dispersion, low-cost diffraction grating having a high diffraction efficiency, and a production method therefore, the diffraction grating comprising a diffraction grating entry surface through which a light from the outside goes inside, a diffraction grating exit surface which faces the diffraction grating entry surface and through which a light gone inside via the entry surface goes outside, and a plurality of reflection surfaces which are formed between the entry surface and the exit surface, receive a light gone inside via the entry surface, and reflect the entered light. The diffraction grating entry and exit surfaces are respectively formed into an almost rectangular shape and face each other in parallel and across a specified interval, and the plurality of reflection surfaces are located equi-distantly and almost perpendicularly to the entry surface and the exist surface to thereby constitute a transmission, flat diffraction grating.