Patent ID: 7286232
Filing Date: 2007-10-23
Classification: G01N

Abstract:
1. A fluorescence filtering system comprising: a source subsystem comprising: a light source; and a first set of filters designed to pass wavelengths of light from the light source to a fluorescent material in an absorption band of a the fluorescent material; and a detector subsystem for detecting light from the fluorescent material comprising: a light detector; imaging optics; a second set of filters positioned between the light detector and the imaging optics, the second set of filters designed to pass wavelengths of light in an emission band of the fluorescent material; and an aperture located at a front focal plane of the imaging optics, wherein a telecentric space is created between the light detector and the imaging optics, such that axial rays from a plurality of field points emerge from the imaging optics parallel to each other and perpendicular to the second set of filters.