发明名称 |
Multi-beam heterodyne laser doppler vibrometer |
摘要 |
A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.
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申请公布号 |
US6972846(B2) |
申请公布日期 |
2005.12.06 |
申请号 |
US20030405045 |
申请日期 |
2003.03.31 |
申请人 |
METROLASER, INC. |
发明人 |
LAL AMIT K.;HESS CECIL F.;ZHANG HANSHENG;HURTADO L. ERNESTO;MARKOV VLADIMIR B.;ARANCHUK VYACHESLAV |
分类号 |
G01B9/02;G01H9/00;(IPC1-7):G01B9/02 |
主分类号 |
G01B9/02 |
代理机构 |
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