外差干涉,heterodyne interferometer
1)heterodyne interferometer外差干涉
1.Research on signal processing system ofheterodyne interferometer instrument for measuring surface roughness with high accuracy;高精度表面粗糙度外差干涉仪信号处理系统的研制
2.Based on the opticalheterodyne interferometer and transmission ellipsometry, a new fast measurement technique of nanometer film was presented computational.结合激光外差干涉法和透射式椭偏测量原理,研究了一种快速、高精度测量纳米厚度薄膜光学参数的方法。
3.At last,a novel method based on laserheterodyne interferometer for measuring multi-degree-of-freedom is proposed,and this method is capable of realizing long-range and high-accuracy.提出了一种新颖的基于激光外差干涉的多自由度测量方法,该方法有很高的精度和测量范围。
英文短句/例句
1.Mach-Rehnder heterodyne interferometer马赫-伦德尔外差干涉仪
2.A New Heterodyne Signal Processing Method for Nanometer Measurement一种新型的纳米级外差干涉信号处理方法
3.The Polarized Light Based Heterodyne Interference System for the Laser Ultrasonic Signal Detector;检测激光超声的线偏振光外差干涉系统设计
4.Theoretical and Experimental Study on the Heterodyne Interferometric Ellipsometry;外差干涉椭圆偏振测量的理论与实验研究
5.Influence of parasitic ghost reflection on measurement in a heterodyne interferometric ellipsometer寄生虚反射对外差干涉椭偏测量的影响
6.Influence of Metal-Coated Mirrors on Measurement Accuracy in Heterodyne Interferometric Ellipsometry金属反射镜对外差干涉椭偏测量精度的影响
7.The AOM heterodyne interferometer can be used in the case of the accuracy beyond nanometer.用双声光调制器的外差干涉仪可以实现纳米测量。
8.Influence of Characteristics of an AOM on the Measurement Accuracy of a Heterodyne Interferometer外差干涉仪中声光调制器特性对测量精度的影响
9.The Study on Heterodyne Interferometric Microscope for Profiles of Microelectronic Mask Surfaces Measurement;用于掩模板表面形貌测量的外差干涉显微系统的研究
10.Study on Symmetrical Common-Path Heterodyne Interferometer for Magnetic Head Flying Height Measurement;对称共路外差干涉磁头飞行高度测量系统的研究
11.Testing large curvature surface of optical element with spatial carrier heterodyne interferometry大曲率光学零件面形的空间载频外差干涉术检测
12.differential interference contrast microscopy差示干涉差显微镜术
13.Mach Zehnder heterodyne interferometer for high precision displacement measurement用于位移精密测量的光外差马赫-泽德干涉仪
14.differential interference phasecontrast microscope微差干涉衬比显微镜
15.differential interference contrast microscope微分干涉相差显微镜
16.infrared prism interferometer-spectrometer红外棱镜干涉光谱仪
17.interventionist foreign policy干涉主义的外交政策
18.scanned IR interferometry扫描红外干涉测量法
相关短句/例句
heterodyne interferometry外差干涉
1.Automatic real-time compensation of vacant band error based on monitor the laserheterodyne interferometry timely;基于实时监测的激光外差干涉仪闲区误差自动补偿
2.High acceleration ultra-precision measurement model in laserheterodyne interferometry;高加速度超精密激光外差干涉测量模型
3.In order to achieve high measuring resolution in wide measuring range with laserheterodyne interferometry measurement in nanometer level,a novel integer-fraction combined signals processing method is presented.为解决在纳米级分辨力激光外差干涉测量中,由于倍频计数限制引起的在大量程条件下测量分辨力难以提高的难题,提出一种新颖的基于锁相环倍频和相位解调技术相结合的整数、小数结合计数式检测方法。
3)heterodyne interference外差干涉
1.With the improvement of measurement velocity in laserheterodyne interference,the theoretical error of laserheterodyne interference seriously restricted the accuracy of measurement.随着激光外差干涉测量速度的提高,其存在的原理性误差严重影响测量精度。
4)Heterodyne interferometer外差干涉仪
1.Dynamic data collection method of heterodyne interferometer based on FPGA;一种基于FPGA的外差干涉仪动态数据采集方法
2.Experimental design for detecting ultrasonic vibration on the surface of metal with heterodyne interferometer;用激光外差干涉仪探测金属表面超声振动的实验设计
5)pesudo heterdyne interference伪外差干涉
6)light heterodyne光外差干涉
1.Thelight heterodyne technique is used.移相干涉术是一种高精度、高灵敏度的光学测试方法,极易受外界振动的影响,为解决光干涉测试中的振动问题,本文在比较了国内外干涉抗振技术后,提出了采用光外差干涉测量振动,以PZT为振动补偿元件的主动抗振方案;详细讨论了抗振方案的原理、电路系统的设计制作、DSP的程序编制;最后进行了抗振实验。
延伸阅读
外差干涉仪又称双频干涉仪或交流干涉仪。是使用两种不同频率的单色光作为测量光束和参考光束。通过光电探测器的混频,输出差频信号(受光电探测器频响的限制,频差一般在 100兆赫以内)。被测物体的变化如位移、振动、转动、大气扰动等引起的光波相位变化或多普勒频移载于此差频上,经解调即可获得被测数据的仪器。外差干涉仪的突出优点是:①由于物体变化所产生的多普勒频移信息是载于稳定的差频上,且其频率较高(几兆至100兆赫),因此,光电探测时避过了激光器的低频噪声和半导体器件的1/f噪声区;又利用频率跟踪等外差解调技术大量滤除了宽带噪声,因此提高了光电信号的信噪比。例如零差干涉测长仪中,当测量光束受外界干扰光强衰减50%时,就不易正常工作,而外差干涉测长仪则可在光强衰减90%时仍能正常工作,因此能用于生产现场,并能测量较长距离(大于60米)。②可以直接从输出频率相对于差频的增减判别运动的方向,因此可以测量物体的连续变化过程如随机振动波形,气流扰动随时间变化过程,而零差干涉仪较难实现。外差干涉仪现已广泛应用于测速、测长、测角、测振、测表面光洁度、测激光束通过湍流时光束的扰动、提高望远镜的视轴瞄准精度以及作自适应光学中的鉴相器等领域,获得了比零差干涉仪更高的精度。外差干涉仪中两种不同频率的光束可由两只稳频的激光器提供,也可以利用磁光、电光、声光效应或旋转光栅盘的衍射效应提供。
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