Patent ID: 6023330
Filing Date: 2000-02-08
Classification: G01J

Abstract:
A centered sphere detection system for an atomic emission spectrometer comprising:a chamber having an entrance slit;a spherical convex diffraction grating positioned within said chamber and aligned along a center axis offset from said entrance slit and having a first radius of curvature;a first concave spherical mirror having a radius of curvature approximately twice that of said diffraction grating positioned in offset relationship to said center axis of said grating in a first direction with the center of curvature of said mirror coincident with the center of curvature of said diffraction grating;a second concave spherical mirror having a radius of curvature approximately twice that of said diffraction grating and positioned on a side of said center axis opposite said first mirror and aligned with its center of curvature coincident with that of said first mirror and said diffraction grating for providing spaced-apart + and - diffraction orders; anda plurality of spaced-apart image sensors positioned along the focal plane of said mirrors in spaced relationship from one another for receiving optical energy reflected by said first and second mirrors.