Patent ID: 6614528
Filing Date: 2003-09-02
Classification: G01J

Abstract:
A simultaneous Paschen-Runge grating optical spectrometer comprising:a single entrance slit (6) through which a beam of radiation enters said spectrometer at a given entrance angle (7); a first concave diffraction grating (1), for producing a zero order focused diffracted beam from said beam of radiation; a tilted mirror (8) for reflecting said focused diffracted beam; a second concave diffraction grating (2) for receiving said reflected beam; a plurality of detecting means far detecting spectral information, chosen from the group consisting of solid state linear array sensors and photomultiplier tubes, and wherein said first and said second diffraction gratings have the same radius of curvature, and are mounted tangentially on a Rowland circle such that their focal curves are congruent (3), and wherein the diameter of said Rowland circle is equal to said radius of curvature of said diffraction gratings.