| 摘要 |
The present invention relates to interferometers with adjustable path length differences (lags). The method of adjusting the interferometer lag is by selectively enabling a plurality of different fixed path length delay elements in either or both of the interferometer arms or paths. In addition, an interferometer with a small but continuously adjustable lag may be extended to much greater lags by adding such delay elements to one or both of the interferometer's paths.
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