With 30, 60, and 90° angles, Littrow Dispersion Prisms feature angular tolerance of >1 arc sec, surface quality of 10/5, surface accuracy of λ/20, and dimensional tolerances of ±.001 in. Uncoated models are suited for image dispersion because they can disperse white light into spectral components. Featuring anti-reflective coating on surface opposite 60° angle to provide constant deviation prism, coated models are suited for applications where it is critical to limit lasing to specific wavelength.
This story is related to the following:Optical Prisms