外差法

提出了一种MEMS构件微小振动、位移测量系统，采用外差法激光多普勒技术，通过对信号的频谱分析，确定了信号处理单元的适宜频带宽度。

A small MEMS component vibration measuring system using heterodyne laser Doppler technology is proposed . The frequency bandwidth is properly determined by analyzing the frequency of Doppler signal .

光学外差法产生微波信号特性的研究

Research on Characteristics of Microwave Signals Generated by Optical Heterodyne

科用外差法测定NH2D斯塔克盒稳定CO2激光频率系统的鉴频曲线

The Measurement of the Frequency Discriminating Curve of CO_2 Laser Frequency-Stabilized System Using NH_2D Stark Cell with the Heterodyne Method

用激光外差法在温度500K下获得了本征GaAs的光声吸收测量。

Photoacoustic absorption measurement of intrinsic GaAs by laser heterodyne at high temperature of 500K was made for the first time .

本文就基于单纵模双波长DBR光纤激光器，利用光外差法产生毫米波信号的技术进行了一系列的理论和实验研究。

In this paper , the theoretical and experimental research is done about millimeter-wave generation technology based on single-longitudinal-mode dual-wavelength Distributed Bragg Reflector ( DBR ) fiber laser .

本文介绍用稳频横塞曼激光（STZL）作光源，研制了光外差法正弦尺干涉测角计装置，提出校正测角灵敏度的一种方法，并用此装置测量压电陶瓷（PZT）的滞后特性。

It used a frequency-stabilized transverse Zeeman laser ( STZL ) as the light source . A method of sensitivity calibration for angle measurement is presented . Hysterisis characteristics of a PZT piezoelectric ceramic have been measured by using this angle-measuring interferometer .

光学外差法检测超光滑表面粗糙度

Measurement of the Roughness of Supersmooth Surface Using Optical Heterodyne Method

介绍了外差法绝对距离测量的基本原理，在此基础上设计了一套用于绝对距离测量的相位测量系统方案。

The principle of absolute-distance measurement based on heterodyne method is introduced .

线性调频外差法测量液体折射率

Measurement of liquid refractive index with a linear frequency modulation heterodyne method

光外差法测量转盘微小偏心距

The rotary turntable eccentricity measurement by using optical heterodyne

对称双混频外差法测量相干光的相位差

The Balanced Dual-mixer Heterodyne for Measurement of Phase Difference between two Coherent Lights

光学外差法面形测量

Measurement of Surface Profile with Optical Heterodyne Method

光学超外差法小平面角精密测量

Precise opto-heterodyne measurement of small plane angle

用光学赝外差法探测相位变化

Phase Measuring by Optical False Heterodyne Method

液晶器件扭曲角与光延迟的光学外差法测试技术理论研究

Theoretical Research of Twist Angle and Optical Retardation Measurement of Liquid Crystal Display by Optical Heterodyne

用来生成微波信号的光学方法有很多，光外差法是其中一种方法。

One of the most important techniques of the system is optical generation of microwave signals .

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。

This paper discussed an opto-heterodyne technique for small-plane-angle measurement with a frequency-stabilized longitudinal Zeeman laser as the light source .

研究了毫米波产生技术中的光外差法，分析了已有的方法的技术特点。

Studied the optical heterodyne method of the millimeter-wave generation methods , analyzed the technical characteristics of the current system structure .

讨论了利用旋转矢量载波高频信号注入、外差法及跟踪观测器检测转子位置的原理。

The methods using rotating vector , carrier frequency excitation and heterodyning , tracking observers for rotor position estimation are discussed .

单频窄线宽掺铒光纤激光器的实现方案及延迟自外差法/零差法测量线宽的理论分析。

Realization of single mode narrow linewidth Er3 + - doped fiber laser and the theoretical analysis of delayed self-heterodyne / homodyne methods .

提出将三频光外差法用于毫米波的产生，研究了此方法的原理和系统结构，理论研究了系统的性能。

A RoF system that uses the three-frequency optical heterodyne method to generate millimeter-wave is studied . Researched the principle and the system structure .

为未来基于偏振外差法光纤激光传感器及其频分复用传感网络技术与应用打下了坚实的基础。

The investigation has laid a solid foundation for the polarization heterodyne fiber laser sensor and its frequency division multiplexing sensor network to apply in future .

本文提出一种光测条纹处理的新方法&光学二维超外差法。

A new processing method for the fringe patterns & - 2-D Optical Super Heterodyne ( 2-D OSH ) technique , is presented in this thesis .

通过采用外差法的转子位置跟踪观测器完成了转子位置信息的提取，实现无机械位置传感器的电机转子位置的检测。

By rotor position tracking observer , with heterodyning processing adopted , the rotor position signal can be picked up and then the self-sensing of the rotor position can be implemented without any specialized mechanical position-sensor .

本文对超高频或微波频段双通道外差法相移测量系统中的交义耦合误差和寄生调制误差作了理论分析，并讨论了它们之间在各种不同情况下的正确合成规律。

This paper describes the theoretical analysis of the cross-coupling and parasitic frequency-modulating errors in the twin-channel heterodyne UHF and microwave phase shift measurement system , and discusses the correct combinations of these errors in various cases .

因此，如果利用光学扫描记录全息信息，那么需要找到一种方法在光电探测的同时来记录相位信息，本文对这个问题的解决采用光外差法。

While holography requires the preservation of the phase information , we , therefore , need to find a way to preserve the phase information during photo detection if we are expected to use optical scanning to record holographic information .

激光自混合干涉测量纳米颗粒粒径属于动态光散射技术中的外差法探测，其功率谱密度反演颗粒粒径分布属于病态问题研究的范畴。

Self-mixing interference ( SMI ) belongs to heterodyne detection of dynamic light scattering ( DLS ) for measuring the particle-sizing distributions ( PSD ) of submicron particles and nanometer particles suspended in suspension . And its power spectral density inversion is ill condition problem .

本文采取了信号变换（模拟前处理）的测量方法，包括RC有源、无源陷波电路、RC低通滤波电路、双T滤波网络，开关电容滤波及外差测量法等。

In this paper , signal conversion method ( processing before analogue ) are used including RC active and on active notching filters , RC low pass filters , double T filters , switched capacitor filters and heterodyne measurement method , etc.

共光路双频外差干涉法测量模拟磁头磁盘静态间隙

Measurement of Simulated Disk / Slider Stationary Spacing by Common-Path Dual-Frequency Interferometry

相干分辨外差干涉法的光学系统表面检测

Optical Surface Measurements with a Coherent Resolved Heterodyne Interferometer