Patent ID: 6414753
Filing Date: 2002-07-02
Classification: G01J

Abstract:
A monochromator for analyzing light passing through a sample, comprising:a housing; a first monochromator mirror within the housing having a reflective surface at a first angle with respect to the vertical; an entrance slit; a light source mounted within the housing adapted to direct light through the entrance slit to the first monochromator mirror; a diffractive surface mounted within the housing adapted to receive light from the first monochromator mirror, the diffractive surface having a top edge, a bottom edge and a reflective diffractive surface therebetween; a second monochromator mirror mounted within the housing adapted to receive light from the diffractive surface in a plane of diffraction, said second monochromator mirror having a reflective surface at a second angle with respect to the vertical, different from said first angle, such that light reflected from the reflective surface of the second monochromator mirror is directed at an angle such that the light does not strike the reflective diffractive surface of the diffractive surface in the plane of diffraction; an exit slit; and a detector for analyzing light passing through the exit slit and the sample.