Patent Number: 6,310,686

Title: Raman probe with spatial filter and semi-confocal lens

Abstract: A material identification apparatus 10 uses a spectrograph and detectorarray detecting a Raman spectrum produced by a sample illuminated by alaser source to recognize a variety of materials. The Raman spectra areproduced by materials illuminated by an inexpensive near-infraredmultimode laser operated in a pulse mode to deliver between 0.05 and 0.5joules of photon energy, with the Raman spectra being detected before anysignificant heating of the sample occurs. The identification apparatus 10qualitatively determines the chemical composition of reinforced andunreinforced copolymers and composites such as ABS, polypropylene,talc-filled polypropylene, polycarbonate, PMMA, PVB, polyethylene, andPVC, from samples of different colors, layers, and textures with a highdegree of success without the need for special sample preparation.

Inventors: Jiang; Yanan (W. Lafayette, IN)


International Classification:

Expiration Date: 10/32013