发明名称 |
Photoacoustic Raman spectroscopy |
摘要 |
A method and apparatus for spectroscopic material analysis are provided. Two coherent beams of monochromatic radiation are directed through a sample of material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially the vibrational frequency of a preselected constituent of the material. Molecular energy of a preselected constituent of the material is increased, thereby producing a detectable signal in the form of a pressure wave. The signal is received by a detecting mechanism which indicates the magnitude thereof.
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申请公布号 |
US4269509(A) |
申请公布日期 |
1981.05.26 |
申请号 |
US19790034512 |
申请日期 |
1979.05.02 |
申请人 |
ALLIED CHEMICAL CORPORATION |
发明人 |
BERRY, MICHAEL J.;BARRETT, JOSEPH J. |
分类号 |
G01J3/44;(IPC1-7):G01J3/44 |
主分类号 |
G01J3/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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