发明名称 |
Multi-dimensional laser Doppler velocimeter |
摘要 |
A reference beam type optical laser Doppler velocimeter for emitting two or more probe beams to an object to be measured at a predetermined angle to multi-dimensionally measure a velocity and/or a displacement vector of the object due to Doppler shifts of beams reflected by the object. This velocimeter includes a frequency shifting means for dividing a laser beam from a single light source into two or more beams, and shifting optical frequencies of the beams each by a predetermined shift amount, a photodetecting means for receiving the reflected and reference beams to obtain a detection current, and a bandpass filter for causing the detection current to pass therethrough to obtain a required signal.
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申请公布号 |
US4990791(A) |
申请公布日期 |
1991.02.05 |
申请号 |
US19890435086 |
申请日期 |
1989.11.13 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
NISHI, HISAMI |
分类号 |
G01S17/58;G01H9/00;G01P3/36;G01S17/50 |
主分类号 |
G01S17/58 |
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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