Patent ID: 7812949
Filing Date: 2010-10-12
Classification: G01J,G02B

Abstract:
1. A spectrometer comprising: a housing having an aperture for receiving a beam of light from a light source; at least one optical element positioned within the housing for collimating the light beam from the light source, dispersing the light beam into different wavelengths, and focusing the dispersed light toward an elongated detector so that the dispersed light is directed along a length of the detector, wherein the dispersed light that is directed to the detector includes astigmatism; and a cylindrical lens located between the at least one optical element and the detector and in the path of the light, the cylindrical lens extending along at least a portion of the detector, the cylindrical lens having a substantially cylindrical face and a substantially flat face, and wherein at least a portion of the cylindrical face is at an angle with respect to the flat face such that at least a portion of the cylindrical lens has a wedge shape, the cylindrical lens adapted to provide substantial astigmatism correction and simultaneously provide substantial demagnification across substantially the entire length of the detector.