Patent ID: 7595875
Filing Date: 2009-09-29
Classification: G01J

Abstract:
1. A spectrometer comprising: at least one slit element located at an object plane; a first optical sub-system having at least one refractive optical element; said first optical sub-system being capable of substantially collimating, at a center plane, electromagnetic radiation emanating from said at least one slit element; at least one dispersive element located substantially at the center plane; a second optical sub-system having at least one refractive optical element; said second optical sub-system and said first optical sub-system being designed substantially according to a symmetrical principle, the center plane being the plane of symmetry; said second optical sub-system being capable of imaging the substantially collimated electromagnetic radiation from the center plane onto an image plane; at least one detecting element located substantially at the image plane; wherein said at least one dispersive element comprises a reflective dispersive element; and, said first optical sub-system is also the second optical sub-system, acting as a dual pass optical sub-system; a housing; an actuator arm extending from a location exterior to said housing to another location inside said housing; said actuator arm being disposed through an opening in said housing and been operatively connected to said structure; and a cryogenic actuator motor operatively connected to said actuator arm; said cryogenic actuator motor enabling movement of said structure and said reflective dispersive element in a direction substantially perpendicular to said interior longitudinal axis; whereby alignment of the spectrometer is enabled.