Considering a measurement example at PTB ′ s Precision Interferometer, the uncertainty of the individual length measurement is small enough so that the range of unambiguity is about 0.6 mm, i.e. a rough estimate of the length is sufficient for ultra precise length measurements.
PTB精密干涉仪长度测量不确定度很小,其单值性范围约0.6mm,因此其近似的长度估算足以满足超精密长度测量的要求。
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