由于光的衍射作用，使通过聚焦系统的激光束入射到特定靶面成一光斑（主光斑） ，而在主光斑以外还有次级光斑圈（旁瓣）。
The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.
当激光束投射在浮雕光栅上，透过光栅的衍射光斑就反映了浮雕光栅的表面信息。
When the laser beams project in the relief gratings, its transmission diffraction patterns represent the surface informations of the relief gratings.
使用不可见激光束垂直投射到旋转全息圆盘上，产生复数衍射光束向不同方向传播。
The compound diffraction beam will be propagated toward different directions when the invisible laser beam is vertically projected on the rotary holographic disk.
本文设计、光刻的BOE能将入射的激光束整形成空间二维点阵状结构光，且其衍射像是非定域的。
The BOE designed and made in this paper is capable of converting the incidental laser beam into structural light of 2 dimensional dots array, and the diffraction image is nonlocality.
采用光波的衍射积分理论，对具有波纹调制激光束的准聚焦特性进行了理论分析。
Based on the diffraction integral theory, the quasi-focused characteristics of a laser beam with waviness modulation have been studied theoretically and numerically in the paper.
本文使用衍射光学元件来提高激光束的焦深。
Focal depth of laser beam is advanced by diffraction optical element in this paper.
在入射光束的孔径受限制的情况下，利用衍射光学元件来增加激光束的焦深。
Placing a diffractive optical element(DOE) on the incident laser beam to improve the depth of focus, the DOE'S aperture is variable.
为了获取长距离超细激光束，采用几何能量守恒法设计出一种衍射光学元件，推导出高斯光入射时衍射光学元件位相函数。
The geometric law of energy conservation is utilized in designing diffraction optical component and evaluating the phase function of diffraction optical component with Gauss beams input.
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；
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；
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.
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