本文概述了用全息位相光栅干涉法将原眼科用的裂缝灯稍做改进便能测定人眼视觉锐度的新技术。
A method of measuring visual acuity with holographic grating is described. The measurement may be performed with a slightly modified conventional ophthalmoscope.
采用矢量理论处理了多台阶位相光栅的衍射问题。
A vector theory for diffraction of multi step phase grating is presented.
采用组合位相光栅技术，制作光强分布均匀、衍射效率较高的多光束分光元件。
A generated technique of balanced light intensity and high efficiency multiple ban splitting beams element using synthetical phase gratings.
由本院精密计量室初试成功的单周期层状位相光栅，为精密测试提供了一种新元件。
This single period layered phase grating, which has been tried out successfully for the first time by our institute, provides a kind of new element for the precision measurements.
本文设计出一种用于光盘系统的位相光栅。
In this paper. A phase grating for optical disk system has been de-signed.
本文中探讨了MBBA液晶中，由热致位相光栅产生的简并四波混频效应。
Degenerate four-wave mixing effect due to thermally induced index grating is studied in liquid crystal MBBA.
本文介绍用化学蚀刻的方法制作二维二元位相光栅。
In this paper, a generated method of 2-d binary phase grating by chemistry etching is presented.
这个表达式适用于任意形状的油膜位相光栅。
This expression is suitable for oil fi-lm phase grating with arbitrary form.
它直接从位相物体振幅透过率的一般公式出发，运用傅里叶积分，求得二进制位相光栅各级衍射光强度的通式。
The series density formulae of the binary phase grating are obtained from the general complex amplitude transmittance formulae through Fourier integral.
采用飞秒激光透明材料改性和飞秒激光双光子聚合技术制备了位相光栅和达曼光栅等微光学元件。
Femtosecond laser direct writing in transparent materials and the two-photon photopolymerization technology are used to fabricate the phase-gratings and Dammann grating.
置一位相光栅于相干光学处理系统频谱平面，利用其零级与一级衍射光的相干迭加实现图象相减。
With a phase grating located at Fourier frequency plane, optical image subtraction is obtained as a result of the coherent superposition of the zeroth and the first order of the diffracted light.
利用此结论创建用于压缩的二值掩模矩阵，并对光栅投影图之一的位相图进行基于离散余弦变换的压缩。
Using this conclusion and considering the characteristic of grating projective images, the paper creates the 0-1 value mask to compress the DCT coefficient matrix.
对投影光栅方法获得的位相调制空间载波图进行二维数字图象处理，实现了散射物体的三维曲面测量。
The shape measuring of a diffuse abject is conducted based on 2-D digital image processing phase modulated fringe pattern acquired by the projection of Ronchi rulings.
上层可动光栅与下层反射镜构成一个位相光栅，其相位由外加驱动电压控制。
The moveable grating and the bottom mirror compose a phase grating whose phase difference is controlled by the actuating voltage.
本文给出了双频光栅自成象的角谱分析，并利用位相型的全息双频光栅的太保效应来进行复制光栅和测定透镜焦距等。
The Angle spectrum analysis of self-image of double frequency grating is given. The grating duplication and the measurement of lens focus are obtained by Tablot effect of holographic phase grating.
提出了一种制作具有预期位相调制度的卤化银乳胶位相型薄全息光栅的方法。
A new method for making a thin silver halide phase holographic grating with an expectation phase modulation is proposed.
数值模拟了SSD各参量，包括脉冲时间、调制频率、位相调制系数、光栅线色散系数等对束匀滑性能的影响。
The influences oft he parameters of the SSD technique on the beam smoothing performance are numeric ally analyzed.
分析了胶片的非线性效应对位相光栅调制深度及编码效果的影响。
The nonlinear effects of the film on the phase modulation depth and encoding results are also analysed.
本发明是三维传感技术中一种可绝对位相展开的十六步双频光栅相移轮廓 术。
The invention provides 16-step dual-frequency grating phase shift profilometry capable of absolute phase unwrapping in the three-dimensional sensor technology.
本发明是三维传感技术中一种可绝对位相展开的十六步双频光栅相移轮廓 术。
The invention provides 16-step dual-frequency grating phase shift profilometry capable of absolute phase unwrapping in the three-dimensional sensor technology.
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