Robert F Heinz

US Patent:

57483086, May 5, 1998

Filed:

Feb 2, 1996

Appl. No.:

8/595675

Inventors:

John M. Lindberg - Grayslake IL
Robert Eric Heinz - Lake Bluff IL

Assignee:

Abbott Laboratories - Abbott Park IL

International Classification:

G01J 304
G01J 328

US Classification:

356310

Abstract:

The present invention provides a programmable filter for use as a standard in correlation spectrometers. Also provided is the use of the programmable standard in a process for determining the concentration of an optically absorbing compound. Also provided is a method and apparatus for noninvasively determining the concentration of an optically absorbing biological sample which incorporates the programmable standard of the invention.