发明名称 |
Device for measuring a nonreciprocal phase shift produced in a closed-loop interferometer |
摘要 |
The device for measuring a nonreciprocal phase shift involves phase modulation of countercirculating waves in a closed-loop interferometer by means of a reciprocal-effect phase modulator. The modulating signal is a periodic signal having a period 2to, where to is the transit time of an electromagnetic wave in the closed loop. A digital phase ramp generated in the form of a stair-step signal is combined with the phase-modulating signals and applied as feedback. In an additional embodiment, control circuits are provided for correcting the modulation scale factor.
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申请公布号 |
US4705399(A) |
申请公布日期 |
1987.11.10 |
申请号 |
US19870021574 |
申请日期 |
1987.03.03 |
申请人 |
THOMSON-CSF |
发明人 |
GRAINDORGE, PHILIPPE;ARDITTY, HERVE;LEFEVRE, HERVE |
分类号 |
G01P9/00;G01C19/64;G01C19/72;G02B6/00;(IPC1-7):G01B9/02 |
主分类号 |
G01P9/00 |
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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