By counting the number of such X-rays while scanning the frequency of the laser pulse, the team could make a very precise measurement of the photon energy required to drive the 2s-2p transition.
通过统计所发出X光的数量，然后对照激光脉冲的频率，测量小组能得出一个非常精确的测量值，从2s能级到2p能级跃迁所需的量子能量。
The measurement error of differential absorption laser radar caused by the shift of its center frequency in measuring atmosphenc density has been discussed particularly.
详细地讨论了微分吸收激光雷达测量气体密度时中心频率的漂移所引起的测量误差。
In this paper, a measuring instrument is designed based on relative measurement of the semiconductor laser frequency stability making use of the beat technology.
本文设计了一种测量仪，基于拍频技术对半导体激光器频率稳定度进行相对测量。
Laser frequency is about 1014 ~ 1015hz, direct measurement of laser frequency stability is very difficult.
激光的频率约1014 ~ 1015hz，直接测量激光频率的稳定度是非常困难的。
The design principle and experiment results of wide frequency band measurement of ps laser pulsewidth are given.
给出了皮秒激光脉冲宽度带测量的设计原理和实验结果。
In order to achieve high accurate measurement of object's velocity, a laser Doppler velocity radar system is established and the frequency estimation algorithm is investigated.
为了实现高准确的测量对象的速度，激光多普勒测速雷达系统建立和频率估计算法研究。
Dual-frequency laser interferometer is a widely used precision measurement instrument.
双频激光干涉仪是应用广泛的精密测量仪器。
In this paper, the measurement method of high frequency brightness modulation laser phase for mechanic surface microcosmic appearance is given out.
提出了用高频光强调制、同源频率合成、软件鉴相的激光相位微距测量方法测量表面微观轮廓高度。
Femtosecond laser-frequency comb techniques are vastly simplifying the measurement.
飞秒激光光梳技术大大简化了光频的测量。
This paper discussed an opto-heterodyne technique for small-plane-angle measurement with a frequency-stabilized longitudinal Zeeman laser as the light source.
文本用纵向塞曼双频稳频激光器作光源，提出了一种光学超外差法小平面角的精密测量方法。
The present state of the dual-frequency laser interferometer in the world is introduced in brief. The trends of development to high resolution, high accuracy, high measurement speed etc. are given.
文章概述了国内外双频激光干涉仪产品的现状，介绍了近年来双频激光干涉仪向高分辨率、高精度、高测速等几个方向的发展趋势。
A remote measurement system of solid surface displacement by laser Doppler effect of grating which was used to produce beat frequency is discussed.
研究了利用运动光栅的多普勒效应进行切向位移的遥测技术。
The measurement result is optimized by using the rotating grating for splitting laser light and producing frequency shift to determine the fluid direction.
采用旋转光栅分束产生频移来辨别流向，使测量最佳化。
The measurement result is optimized by using the rotating grating for splitting laser light and producing frequency shift to determine the fluid direction.
采用旋转光栅分束产生频移来辨别流向，使测量最佳化。
应用推荐