Patent ID: 6147350
Filing Date: 2000-11-14
Classification: G01J,G01N

Abstract:
A residue detection system for spectroscopic analysis of non-volatile residues comprising:A) a light source,B) a detector cup comprising:1) a detector portion comprising:a) a light detector,b) a structural element defining a detector portion inside surface andc) a light port, and2) a cup portion defining a cup portion inside surface, said cup portion inside surface defining a cup portion inside surface area, and containing a sample spread over at least half of said inside surface area, said cup portion being releasably attached to said detector portion such that said detector portion and said cup portion inside surfaces define an enclosed diffusely reflecting volume,C) an optical train for directing light from said light source into said enclosed diffusely reflecting volume,D) a processor for analyzing signals produced by said light detector to determine optical characteristics of said sample;wherein said light detector in said detector portion detects light from said light source after multiple reflections from the surfaces of the detector and cup portions and multiple passes through the sample deposited on said cup portion inside surface.