发明名称 |
Enhanced sensitivity vibrometer |
摘要 |
An enhanced sensitivity laser vibrometer with increased output signal strength and more sensitive surface vibration detection, is provided by using a reflective mirror assembly to repeatedly bounce the sensing laser beam against the acoustic pressure-sensing diaphragm to magnify the acoustic incident pressure wave being detected. The enhancement in signal strength, in terms of power spectral density, is a function of the number of bounces squared and the detection of surface vibrations with a displacement of smaller than 4 picometers is demonstrated experimentally. |
申请公布号 |
US8072609(B1) |
申请公布日期 |
2011.12.06 |
申请号 |
US20080345861 |
申请日期 |
2008.12.30 |
申请人 |
TRIVEDI SUDHIR;SWAMINATHAN VENKATARAMAN;WANG CHEN-CHIA;THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE ARMY |
发明人 |
TRIVEDI SUDHIR;SWAMINATHAN VENKATARAMAN;WANG CHEN-CHIA |
分类号 |
G01B9/02 |
主分类号 |
G01B9/02 |
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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