Laser interferometer systems are now in widespread use in engineering metrology for the measurement of length , displacement and other dimensional quantities 在工程计量学上,激光干涉仪已被广泛使用于测量长度、位移及其他与长度有关的量值。
The laboratory can also provide calibration services for gauges , measuring instruments and machines used to check andor measure length and geometrical parameters ( e . g . flatness , parallelism , straightness and squareness ) 本所为量规、测量器具及用作检查及或测量长度及几何参数(例如:平面度、平行度、直线度及直角度)的机械提供校正服务。