本文将介绍由英国国立物理研究所研制的一种新型高精度激光测长系统及其在测量中的应用。 一、测量原理 图1示出了该系统的方框图,其中的主要部件是激光干涉仪。 线偏振的相干光是由双模单一稳频激光器输出的。当它进入干涉仪后,由分束器分 This article will introduce a new type of high precision laser length measuring system developed by the British National Institute of Physics and its application in the measurement. First, the measurement principle Figure 1 shows a block diagram of the system, which is the main component of the laser interferometer. The linearly polarized coherent light is output by a dual mode single frequency stabilized laser. When it enters the interferometer, split by the beam splitter