Enhancing selectivity and/or sensitivity of spectroscopic...

Details Enhancing selectivity and/or sensitivity of spectroscopic... Enhancing selectivity and/or sensitivity of spectroscopic...

2007-04-26

2010-06-22

Lauchman, L. G (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

C356S301000

Reexamination Certificate

active

07742166

ABSTRACT:
An apparatus for enhancing the selectivity for spectroscopic measurements of analytes in a turbid medium is described. In one example, spatial filters are used to select only certain radii from the medium to be imaged. This selection is accomplished by placing an optical obstruction on the surface of the medium or at an image plane of the surface later in the optical imaging system. In one implementation, this is achieved by placing a fiber bundle at an image plane of the collecting optical system and then using a spacer of appropriate size at the center of the fiber bundle to act as a central obstruction.

REFERENCES:
patent: 5553616 (1996-09-01), Ham et al.
patent: 6144791 (2000-11-01), Wach et al.
patent: 6862090 (2005-03-01), Chen et al.
patent: 2008/0129992 (2008-06-01), Matousek et al.
PCT International Search Report and Written Opinion, PCT/US07/67608, Feb. 13, 2008, 8 pages.

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