Patent ID: 7647092
Filing Date: 2010-01-12
Classification: A61B,G01N

Abstract:
1. A probe for measuring tissue, comprising: a fiber optic probe having a proximal end, a distal end, a tubular body having a diameter of 2 mm or less; a delivery optical fiber in the probe coupled at the proximal end to a light source and having a first filter at a distal end of the delivery optical fiber that filters light from the light source transmitted through the delivery optical fiber; a plurality of collection optical fibers in the probe that collects Raman scattered radiation from tissue, the collection optical fibers being coupled at the proximal end to a detector and having a second filter at a distal end of the collection optical fibers that filters light collected at the distal end through the collection optical fibers; and an optical module having a rod within a cylindrical tube and a sleeve that optically isolates the cylindrical rod from the tube, the first filter being formed on a proximal surface of the rod and the second filter being formed on a proximal surface of the cylindrical tube such that collected light is transmitted through the cylindrical tube and the second filter before entering the distal ends of the plurality of collection fibers; an optical lens system at the distal end of the optical module that is optically coupled to the distal end of the delivery fiber and the collection optical fibers through the optical module, the optical system including a refractive optical element at the distal end of the tubular body.