Patent ID: 6307634
Filing Date: 2001-10-23
Classification: A61B,G01B

Abstract:
An apparatus for measuring the distribution profile of a light scattering potential of an object defining a plurality of measurement sites, comprising:(b) at least one light source generating a plurality of light beams including at least one reference light beam and at least one measurement light beam, the light beams having short coherence length:(c) at least one frequency shifter positioned in at least one beam path of the light beams;(d) a receiver receiving reflected light from at least one measurement site and from at least one reference site, the receiver generating a signal representative thereof;(f) at least one optical scanner positioned to direct at least the measurement light beam to at least one selectable measurement site;(g) at least one polarizer and one quarter wave plate, wherein the polarizer and the quarter wave plate are positioned in a return beam path such that light in the return beam path returning from the object is directed to avoid passing the frequency shifter, wherein the signal generated by the receiver is usable for determining a multi-dimensional distribution of a light scattering potential of the object.