Range (i.e., absolute distance), displacement, and velocity of a moving target have been measured with a frequency scanning interferometer that incorporates a ${100}{,}{000}\;{\rm scan}\;{{\rm s}^{- 1}}$ vertical-cavity surface-emitting laser with 100 nm tuning range. An adaptive delay line in the reference beam, consisting of a chain of switchable exponentially growing optical delays, reduced modulation frequencies to sub-gigahertz levels. Range, displacement, and velocity were determined from the phase of the interference signal; fine alignment and linearization of the scans were achieved from the interferogram of an independent reference interferometer. Sub-nanometer displacement resolution, sub-100-nm range resolution, and velocity resolution of ${12}\;\unicode{x00B5}{\rm m}\;{{\rm s}^{- 1}}$ have been demonstrated over a depth measurement range of 300 mm.

中文翻译：

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使用频率扫描干涉仪和自适应延迟线进行高速范围和速度测量[已邀请]

已经使用频率扫描干涉仪测量了移动目标的范围（即绝对距离），位移和速度，该干涉仪结合了$ {100} {，} {000} \; {\ rm scan} \; {{\ rm s} ^ {-1}} $垂直腔面发射激光器，调谐范围为100 nm。参考光束中的自适应延迟线由一连串可切换的指数增长的光学延迟组成，将调制频率降低到了千兆赫兹以下。范围，位移和速度由干扰信号的相位确定。扫描的精确对准和线性化是通过独立参考干涉仪的干涉图实现的。亚纳米级位移分辨率，100 nm以下范围分辨率和速度分辨率$ {12} \; \ unicode {x00B5} {\ rm m} \; {{\ rm s} ^ {-1}} $ 已在300毫米的深度测量范围内得到证明。