Diffraction Gratings

Diffraction gratings are optical components that divide incident light into its component wavelengths while transmitting or reflecting light. At MEETOPTICS you can find and compare transmission gratings and reflective gratings for the Ultraviolet (UV), Visible and Infrared (IR) region from suppliers such as omega optical, Edmund Optics, Thorlabs, SSI Optics, Meadowlark, and Knight Optical.

Among reflective gratings, ruled gratings and holographic gratings are the most common and are manufactured on a flat (plane) or concave substrate. While ruled gratings typically have higher efficiency, holographic gratings often have lower scatter. Echelle gratings are coarse, high-blaze angle gratings used in high diffraction orders. In transmission gratings, dispersion increases as the angle of incidence (AOI) increases or as groove spacing decreases. Coarse groove spacing maintains high efficiency while fine groove spacing reduces transmission at long wavelengths resulting in low efficiency.