The high spatial resolution digital phase-shifting technology and feedback control technology were utilized in design of the device to improve its precision. 该标准装置采用高分辨率全数字移相技术和反馈控制技术,有效地提高了装置输出精度。
In modern digital phase-shifting interferometry ( PSI), the phase-shifting error of piezoelectric transducer ( PZT) optical phase shifter, which is the basic device of phase-shifting interferometer, directly effects measurement accuracy during wavefront phase unwrapping with phase-shifting interferograms. 压电晶体(PZT)光学移相器作为移相干涉仪(PSI)的关键部件,其移相误差直接影响被测波面的相位复原精度。
A digital phase-shifting frequency-dividing clock has been designed with CPLD ( Complex Programmable Logic Device) technique which modularizes hardware circuit and integrates different modules into one chip. 设计了一种数字移相分频钟,其中利用了先进的复杂可编程逻辑器件(CPLD-ComplexProgrammableLogicDevice)技术,将硬件电路模块化,把各功能模块集成在一个芯片中。
The design of the phase-shifting circuit of one-way phase earth circuit device 单相接地选线装置移相电路的设计
Besides, the experimental setup of phase-shifting digital holography is described. ( 3) Because phase-shifting digital holography is highly demanding for the precision of the phase-shifting device, the more phase shifts are operated, the greater errors may be resulted in. 由于相移数字全息术对相移装置的精密度要求很高,相移操作次数越多,可能造成的误差越大。
It is not need the phase-shifting transformer, which reduces the system volume. In addition, the withstand voltage and power requirements of power electronic device is significantly reduced. 该多相电动机高压变频器无需移相变压器,减小了系统体积和成本,同时,由于结构的特点,大幅降低了电力电子器件耐压和功率要求。
We provide the grating phase-shifting digital in-line holography with Digital Micro-mirror Device ( DMD). 本文提出了利用数字微镜器件DMD实现的光栅相移数字同轴全息再现技术。