1) Two-gratings frequency shifting
双光栅频移
2) two-frequency grating
双频光栅
1.
The real-time measurement by two-frequency grating;
关于双频光栅对物体实时测量的研究
2.
Li and Yasuyuki successively proposed two different two-frequency gratings used for three-dimensional surface profilometry.
Li和Yasuyuki先后提出了两种应用于三维面形测量的双频光栅剖面术,这两种双频光栅均是将两种不同频率的条纹模式复合在同一个光栅上,但光栅复用的原理并不相同。
3) double-frequency grating
双频光栅
1.
CCD is used in double-frequency grating shearing interferometer to measure the time and space coherence of light field quantitatively and spherical aberration of gradient-index rod lens.
利用双频光栅剪切干涉法 ,CCD摄像机采集剪切干涉条纹图 ,用自行设计的软件对图像进行处理 ,可定量测量光场的时空相干性以及梯度折射率透镜的像
2.
An interferometric technique with double-frequency grating used to measure the thermal lensing of a Ti: sapphire rod pumped with Ar ̄+ laser axially is presented.
报道了用双频光栅剪切干涉术检测钛宝石晶体在Ar ̄+激光器轴向泵浦下的热效应的方法,并给出用这种方法测量钛宝石晶体热透镜焦距随不同泵浦功率变化的实验结果。
4) holographic grating with double frequencies
双频全息光栅
1.
In this paper, severer important problems about 3-D profile measuring using face-structuer-lighting are discussed, a kind of holographic grating with double frequencies which can be used to operat-ing face-structure-lighting is provided, many ways of grating-image process are present, and the fringe recognize and grating encode are also described.
本文就面结构光照明三维面形测量中几个重要问题作了探讨,制作了一种实用的简单的面结构光场-双频全息光栅,给出了光栅图像处理的办法,分析了在软件设计中条纹识别问题,并介绍了光栅编码的有关情况。
5) holographic double frequency grating
全息双频光栅
6) Two-frequency grating projection
双频光栅投影
补充资料:多普勒频移
多普勒频移
物理学术语。又称“多普勒频率”。由多普勒效应引起发射频率与运动目标反射波或散射波信号频率之间的频差。反射体引起的多普勒频移(fd)与发射频率(fs)的关系式为fd=(2Vcosθ)·fs,C为声速,V为反射体的运动速度,θ为反射体运动方向与声束指向之间的夹角。取超声诊断中的典型数据可算得血流。胎心检测中的多普勒频移(fd)均在声频范围之内,因此这类诊断仪器均可采用扬声器来监听。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条