Patent ID: 6816241
Filing Date: 2004-11-09
Classification: A61B

Abstract:
A light source assembly for non-invasive optical sampling, comprising:a plurality of LED's, wherein at least one of said plurality of LED's emits at a wavelength region different from and overlapping with that of at least another of said plurality of LED's; a LED substrate, said substrate providing mechanical support for said LED's, so that said LED's and said substrate form a LED/substrate subassembly; means for electrically connecting said LED's; means for shaping light beams emitted from said LED's; means for controlling light intensity profile; means for coupling said signal to a sample interface; means for collecting light emitted from said sample; wherein said means for shaping light beams emitted from said LED's comprises a plurality of parabolic reflectors, wherein each reflector is mounted within a well on an anterior face of said substrate, and wherein each of said LED's is fixedly attached within a corresponding reflector, so that divergence between light beams is minimized.