Cascaded systems based on diffractive optical elements for optical image encryption are presented.
提出基于衍射光学器件的光学图像级联加密系统。
Cascaded systems for optical image encryption based on diffractive optical elements are presented.
提出基于衍射光学器件的光学图像级联加密系统。
Abstract : Ion beam etching technologies for developing large aperture Diffractive Optical Elements (DOEs) were reviewed.
摘要 ：总结了大尺寸衍射光学元件离子束刻蚀技术的研究进展。
The method has been successfully used in the system for measuring the 3-d surface topography of diffractive optical elements.
此方法已成功地应用于自行研制的衍射光学元件三维表面形貌测量系统中。
We have brought forward the weighted serial iterative (WSI) algorithm which is employed to resolve the design of diffractive optical elements (DOE).
提出加权串行迭代(WSI)算法用于解决衍射光学元件(DOE)的设计问题。
A linewidth stabilizing method for defocusing laser direct writing is proposed for further improvement of line quality of diffractive optical elements.
为了提高激光直写加工衍射光学元件时的线条质量，提出一种离焦激光直写的线宽稳定方法。
The existence and overlapping phenomena of spatial expanding components have been discovered and investigated in designing diffractive optical elements.
发现并研究了衍射光学器件优化设计中空间延拓分量的存在及其交叠现象。
Based on geometric theory, diffractive optical element s applied to shape laser beams is designed, the phase expression of the diffractive optical elements is deduced.
以几何理论为基础来设计将激光束整形为正方框形光束的衍射光学元件（DOE），推导出了衍射光学元件表面上的相位表达式；
A variable transmittance is provided to different position on grayscale mask plane and the required diffractive optical elements can be obtained after one-time exposure.
通过灰度掩模平面不同位置处提供可变的透过率，经一次光刻后得到所需的衍射光学元件。
The diffractive optical elements(DOEs) used in imaging systems has many advantages, such as achromatization and thermal compensation besides the features of saving in mass and volume.
采用衍射光学元件除了能减小成像系统的体积和重量外 ，还具有许多传统光学元件无法比拟的优越性 ，如消色差和热补偿功能等。
The application of diffractive optical elements in laser systems, optical interconnects, wave-front sensing, eyepiece design and scanning systems. Current highlights are also discussed.
本文主要介绍了衍射光学元件在激光系统、光学互连、波前探测、目镜设计和扫描系统上的应用，以及目前技术上的热点。
In almost all literatures, it is mainly used to compute one-dimensional diffractive optical elements and two-dimensional diffractive optical elements with rotationally symmetric structures.
在大多数文献中，主要用它来设计一维衍射光学元件和具有旋转对称结构的二维衍射光学元件，故在此称之为一维杨顾算法。
The introduction of binary optical elements, theory of diffractive lenses, fabrication of binary optical elements and trends are related.
本文介绍了二元光学元件的概况，衍射透镜理论，二元光学元件的制造方法以及发展趋势。
Laser direct writing system is the key equipment for fabrication of optical diffractive elements, and the defocus detection technique is the important sub-tech in it.
激光直写机是制作衍射光学元件的关键设备，离焦检测技术是其中的重要单元技术之一。
With the techniques and elements of diffractive optics, it is now feasible to break the diffraction limit and achieve optical superresolution.
利用衍射光学的技术与器件，能够突破受限于衍射极限的分辨率，实现光学超分辨。
With the techniques and elements of diffractive optics, it is now feasible to break the diffraction limit and achieve optical superresolution.
利用衍射光学的技术与器件，能够突破受限于衍射极限的分辨率，实现光学超分辨。
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