A monolithic Offner spectrometer is described herein as are various components like a diffraction grating and a slit all of which are manufactured by using a state-of-the-art diamond machining process. In one embodiment, a monolithic Offner spectrometer is directly manufactured by using a diamond machining...http://www.google.com/patents/US7697137?utm_source=gb-gplus-sharePatent US7697137 - Monolithic Offner spectrometer
