公开(公告)号：US06483581B1

公开(公告)日：2002-11-19

申请号：US09446673

申请日：1999-12-22

申请人： Dor Ben-Amotz ,  Yanan Jiang ,  Edward R. Grant ,  Ken Haber ,  George M. Laurence, Jr.

发明人： Dor Ben-Amotz ,  Yanan Jiang ,  Edward R. Grant ,  Ken Haber ,  George M. Laurence, Jr.

IPC分类号： G01J344

CPC分类号： G01N21/65 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0272 ,  G01J3/0289 ,  G01J3/0291 ,  G01J3/44 ,  G01N21/85 ,  G01N2021/656

摘要： A hand-held material identification apparatus 10 uses a spectrograph and detector array detecting a Raman spectrum produced by a sample illuminated by a laser source to recognize a variety of materials with a command to recognition time cycle of about one second or less. The width of the spectrum detected by each detector in the array is less than ¼th the excitation source wavelength deviation to permit smoothing of the spectrum detected by the discrete spectral elements to eliminate pixel noise without loss of Raman spectral information. The Raman spectra are produced by materials illuminated by an inexpensive near-infrared multimode laser operated in a pulse mode to deliver between 0.05 and 0.5 joules of photon energy, with the Raman spectra being detected before any significant heating of the sample occurs. The identification apparatus 10 qualitatively determines the chemical composition of reinforced and unreinforced copolymers and composites such as ABS, polypropylene, talc-filled polypropylene, polycarbonate, PMMA, polyethylene, and PVC, from samples of different colors and textures with a high degree of success without the need for special positioning or sample preparation.

摘要翻译： 手持材料识别装置10使用检测由激光源照射的样品产生的拉曼光谱的光谱仪和检测器阵列，以识别大约1秒以下的识别时间周期的指令来识别各种材料。 由阵列中的每个检测器检测到的光谱的宽度小于激发源波长偏差的1/4，以允许平滑由离散光谱元素检测的光谱，以消除像素噪声而不损耗拉曼光谱信息。 拉曼光谱由以脉冲模式操作的便宜的近红外多模激光器照射的材料产生，以传递0.05至0.5焦耳的光子能量，在样品发生任何显着加热之前，检测拉曼光谱。 识别装置10从不同颜色和纹理的样品定性地确定增强和非增强共聚物和复合材料如ABS，聚丙烯，填充滑石的聚丙烯，聚碳酸酯，PMMA，聚乙烯和PVC的化学组成，而没有 需要特殊定位或样品制备。