Patent · US Active

Trace evidence detection using multiple laser light sources

US7615761B2 · kind B2 · utility

1Cited by

7References

13Claims

0Family size

Assignee

Coherent, Inc. · US

Inventors

Lukas E. Hunziker · San Jose, US
Georg Herink · Bayreuth, DE
Arnaud Lepert · Belmont, US

Key dates

Filing date	Aug 28, 2008
Grant date	Nov 10, 2009
Priority date	—
Expiry date	Aug 28, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01N2201/0634
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting trace evidence materials on a surface comprises irradiating the surface with radiation from two or more lasers emitting radiation at different wavelengths selected to stimulate luminescence in the trace materials. The evidence is detected by observing the surface through an optical filter arranged to transmit the luminescence, while blocking transmission of the laser radiation wavelengths reflected or scattered from the surface.

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