Plane Ruled Diffraction Grating, 1200 g/mm, 500 nm, 17.5°

Plane Ruled Diffraction Grating, 1200 grooves per mm, 500 nm nominal blaze wavelength (1st order Littrow), 17.5° nominal blaze angle

Plane Ruled Diffraction Grating, 1200 grooves per mm, 500 nm nominal blaze wavelength (1st order Littrow), 17.5° nominal blaze angle