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.
也就是说长焦深和高横向分辨率是不可能同时实现的。
That means high lateral resolution and long focusing depth can't be produced simultaneously in standard OCT.
详细地论述了相移掩模提高光刻分辨力和改善焦深的原理。
The principle for improving microlithographic resolution and focal depth with phaseshifting mask is described in detail in the paper.
提出了一种具有增大焦深特性的改进型分形波带片(fzp)。
A modified fractal zone plate (FZP) with the character of extending the focal depth is proposed.
主要就曝光能量，分辨力改善情况，焦深变化等与传统情况作了比较。
Exposure energy, improvement of resolution and depth of focus are compared with that of conventional condition.
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.
提出了一种无衍射结构光概念，这种光具有线性结构、焦深长、线宽小等特点。
This paper puts forward a conception of a non-diffraction structured light (NDSL), which has characteristics such as linear structure, long focal-depth and narrow line-width, etc.
本文介绍全焦距成像技术，介绍焦深理论、快速全焦距透镜、快速成像和处理电路。
This paper introduces entire focus imaging technology, including the focus and depth theory, fast entire focus lens, fast imaging technique and signal conditioning circuit.
焦深在高密度光盘存储系统中具有十分重要的作用，大焦深可以使调焦伺服系统容易跟踪盘面。
Focal depth plays an important role in optical storage systems, and high focal depth makes the focusing servo system easy to track the disk surface.
本文以衍射光学为基础，详尽地分析了光束孔径匹配对光能耦合效率、光斑尺寸、物镜焦深的影响。
Based on the diffraction optics, this paper analysis the effect of aperture matching on EMR, size of focus point and focus depth of the object in detail.
数值计算了圆形透镜的色散，结果表明：焦斑的半径和焦深随入射波长的变大而减小，光斑的强度随入射波长的变大而增强。
The results of computer simulation show that both the radius of disk and the depth of focal length decrease as increasing incidence wavelength, meanwhile, the intensity of disk is enhanced.
摘要：超声相控阵聚焦能将超声能量聚焦于被检区域，使检测结果更加明显，但缺陷定量结果受相控阵仪器聚焦深度的设置影响较大。
Abstract: ultrasonic phased array focusing ultrasonic energy on the inspected area to make the test results more obvious. The focus depth setting had great influence in defect quantification.
与其他聚焦方式相比，多元组合聚焦超声换能器具有较大的聚焦深度、较理想的焦域以及较高的声强度等优点，并且聚焦区域和声强度易于控制。
Comparing with other kinds of focusing methods, it has a lot of merits: a deeper focal length, a greater ultrasound intensity and an ideal focal region and all of them are easily controlled.
分别从横向和纵向两个方面分析了改进型分形波带片的光场分布，结果表明，在宽带光照明下，改进型分形波带片的焦深也大于常规的分形波带片。
The analysis of the lateral and axial properties shows that the focal depth of the modified FZP is larger than the FZP under the broadband lighting.
分别从横向和纵向两个方面分析了改进型分形波带片的光场分布，结果表明，在宽带光照明下，改进型分形波带片的焦深也大于常规的分形波带片。
The analysis of the lateral and axial properties shows that the focal depth of the modified FZP is larger than the FZP under the broadband lighting.
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