A spectrometer has a source of illumination radiation having a plurality of spectral wavelengths, a bandpass filter, a dispersive beamsplitter disposed in an optical path of said source of illumination radiation, an illumination radiation rejection filter, and a spectrograph disposed in a path of radiation...http://www.google.fr/patents/US6583873?utm_source=gb-gplus-shareBrevet US6583873 - Optical devices having a wavelength-tunable dispersion assembly that has a volume dispersive diffraction grating
Optical devices having a wavelength-tunable dispersion assembly that has a ...
