Diffraction grating is composed of dense, equally spaced parallel

engraved lines, optical glass substrate, surface aluminum reflective film,

white light can be separated into various components by diffraction effect.

High-quality ruled diffraction gratings can almost meet all diffraction requirements,

especially when the efficiency requirements are relatively high. Diffraction

gratings can be used in various monochromatic light research, teaching,

and industrial occasions. Almost all commercial spectrophotometers use diffraction

gratings to select specific wavelengths or scan the entire wavelength range

This reflective ruled grating (blazed grating) has a sawtooth shape,

which is different from the holographic grating.