Patent ID: 7274445
Filing Date: 2007-09-25
Classification: G01N

Abstract:
1. A system for detecting a scattering site in a transparent object having a thickness less than 350 micrometers, the system comprising: a radiation source to direct radiation toward a surface of the transparent object at an oblique angle; a mirror having a substantially ellipsoid shape, having a first foci and a second foci, said second foci positioned substantially at a first position of the transparent object; an opaque surface having a pinhole positioned substantially at said first foci, said pinhole having a first diameter corresponding to a first depth of focus of said elliptical mirror, for permitting a first scattering signal to pass through said pinhole that is scattered from the scattering site within said first depth of focus, wherein said pinhole diameter is less than or equal to the thickness of the object; and a sensor for receiving said first scattering signal.