Patent · US Expired

Photometric detection system having multiple path length flow cell

US6603556B2 · kind B2 · utility

11Cited by

14References

9Claims

0Family size

Assignee

World Precision Instruments · US

Inventors

Mathias Belz · Sarasota, US
Su Yi Liu · Sarasota, US
Richard L. Miller · Dix Hills, US

Key dates

Filing date	Oct 11, 2001
Grant date	Aug 5, 2003
Priority date	—
Expiry date	Oct 11, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/0346
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A photometric detection system including a light source, a photometric detector, and a flow cell assembly. The flow cell assembly includes a tubular liquid core waveguide having inlet and discharge ends for receiving and discharging a flow of the sample fluid. A first coupling device optically couples the light source to the waveguide at a first position along the length of the waveguide. A second coupling device optically couples the detector to the waveguide at a second position along the length of the waveguide. The first and second positions define an optical path length within the waveguide. The second position is variable relative to the first position such that the optical path length is selectively varied.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.