Patent ID: 7411674
Filing Date: 2008-08-12
Classification: G01J,G02B,G03F

Abstract:
1. A polarizing monochromator for selecting monochromatic, linearly polarized light, comprising: a uniaxial birefringent crystal prism; a collimator optical system for collimating light entering the prism; and a light-collecting optical system for collecting light exiting from the prism; wherein the prism has the geometry of a triangular block having a triangular base, a face including a side of the hypotenuse is an input-output face, where light enters and exits, and a face including a longer side of the right angle is a reflection face; the optic axis of the prism is perpendicular to the base of the prism; the angle of the input-output face of the prism with respect to light coming from the collimator optical system is determined in such a manner that ordinary light and extraordinary light exit from the input-output face of the prism in opposite directions with respect to an optical axis connecting the collimator optical system and the prism; and the light-collecting optical system is disposed to collect either extraordinary light or ordinary light exiting from the input-output face of the prism.