发明名称 |
Method and apparatus for reducing rotational bias in a ring laser |
摘要 |
Method and apparatus for reducing rotational bias error in a ring laser. The method includes the steps of varying a portion of an optical path for laser beams that emerge from a ring laser cavity along divergent paths and are subsequently combined along a common path to a detector. The apparatus of one embodiment includes a movable mirror positioned to intercept the laser beams emerging from the ring laser cavity before combination along a common path. The movable mirror may be piezo-electric transducive elements configured to bend on application of a voltage. The piezo-electric elements are provided with a reflective region that is positioned to redirect the laser beams from the ring laser back to an output coupling mirror so that re-reflection from the output mirror redirects the laser beams back into a beam combining optical element. In an alternative embodiment the detector is periodically displaced along an access parallel to the common path of the laser beam. In this embodiment piezo-electric elements are disposed between the beam combining optic and the detector to periodically displace the detector.
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申请公布号 |
US5373360(A) |
申请公布日期 |
1994.12.13 |
申请号 |
US19900619703 |
申请日期 |
1990.11.09 |
申请人 |
LITTON SYSTEMS, INC. |
发明人 |
MARTIN, GRAHAM;JABR, SALIM |
分类号 |
G01C19/66;(IPC1-7):G01B9/02;H01S3/08 |
主分类号 |
G01C19/66 |
代理机构 |
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主权项 |
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