Patent ID: 6630673
Filing Date: 2003-10-07
Classification: A61B,G01N

Abstract:
An apparatus for determining the concentration of an analyte in a sample, said apparatus comprising:a) at least one source of light, said at least one source of light adapted to introduce light at a single light introduction site on a surface of said sample; b) at least two groups of light collecting elements, each of said groups of light collecting elements comprising at least two light collecting elements, each of said groups of light collecting elements located at a different distance from said light introduction site on said surface of said sample, each of said different distances corresponding to a different depth in said sample, wherein said light collecting elements comprise optical fibers, said optical fibers being arranged in a hexagonal close-packed structure; c) at least one detector for measuring light collected by said light collecting elements; and d) a signal processor to determine said concentration of said analyte of said sample.