McPherson - Model 303 -250 mm Prism Imaging Monochromator

The Model 303 is a 250mm focal length f/4 prism monochromator with good throughput. It is built like a Czerny-Turner and uses a prism in Littrow configuration for refraction. Prisms do not have multiple orders like diffraction gratings and are capable of very low dispersion. The 303 monochromator used with slits works as a tunable filter, or cut filter for UV-Raman applications. Used with a wide exit slit (or by removing the exit slit) the focal plane accepts an imaging CCD or infra-red bolometer array (for example).