Multi-photon absorption detection of materials

Details Multi-photon absorption detection of materials Multi-photon absorption detection of materials

2007-10-01

2010-11-02

Evans, F. L (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

C356S417000

Reexamination Certificate

active

07826053

ABSTRACT:
An exemplary embodiment includes an apparatus having an energy source for selectively directing a first energy toward a first material. The at least a portion of the first energy excites a preselected second material to an excited state where at least two photons of the first energy are absorbed by the molecule of the second material causing the molecule to emit a second energy at about a predetermined wavelength. The apparatus also includes a control system for directing the first energy toward the first material. The apparatus also includes a detector for detecting at least a portion of the emitted second energy when the detector is more than about 40 meters from the molecule.

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