Patent ID: 6989898
Filing Date: 2006-01-24
Classification: G01J

Abstract:
1. A system for inverting with respect to the dispersion direction the wavefront of an optical beam in a monochromator employing more than one pass of said optical beam through the dispersing medium, said system comprising: at least one optical component including at least one reflective surface, said at least one optical component operable when positioned in said optical beam between successive passes of said optical beam through said dispersing medium to deflect said optical beam from a first optical path and to redirect said deflected optical beam along a second optical path coaxial with said first optical path, such that said wavefront in said second optical path is inverted with respect to said dispersion direction from said wavefront in said first optical path; wherein said inverting is operable to be reversible, depending upon the position of said at least one optical component, and wherein said inverting is operable to be reversible by reorienting said at least one optical component orthogonally about an axis coaxial with said first optical path.