| 摘要 |
The present invention relates to interferometers (200-900) 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 (25, 303, 304, 305, 420, 470, 903, 904) in either or both of the interferometer arms or paths. In addition, an interferometer with a small but continuously adjustable lag (24, 350) may be extended to much greater lags by adding such delay elements to one or both of the interferometer's paths. |
