. It is necessary to cut the sheet 5 of Fresnel lens as the semi-finished product along the four cutting lines to remove the unwanted portions from the sheet 5 as described above.
第8条第。既要削减表5菲涅耳透镜作为半成品，沿线四个切割线，以消除有害的部分，从表五如上文所述。
In order to solve the problems in system of four aspheric mirrors, Fresnel mrirror and the catadioptric projection lens, the method that free form surfaces were used to design ultra-thin imageing system was put forward at last.
为了解决上述四片非球面系统、Fresnel反射镜和折反系统结合投影镜头存在的问题，本文最后提出了采用自由曲面设计超薄成像系统的方法。
An experimental investigation of the combination of a long focal distance Bragg-Fresnel lens with a bimorph mirror is described.
描述了对长焦距布拉格-菲涅耳透镜与可变曲率半径反射镜组合所做的实验研究。
Design of objective lens with reflective spherical fresnel zone plate.
应用反射型球面菲涅耳波带片的成像物镜设计。
Some parameters, such as the diffraction aperture, the diffraction distance and phase levels of Kinoform, are discussed. They are key factors to the variable focallength phase Fresnel lens.
分析衍射孔径、衍射距离、相息图位相阶数等参数对变焦位相菲涅耳透镜的影响，并以点光源相息图为例对该方法的可行性进行了实验验证。
The Fresnel lens in the optical receptor spotlights the headlamp beams to form their image at the 1-meter distance between the optical receptor and headlamps. CMOS camera as an image sensor, takes the photos of their images, which are captured by VG-M201, The application of some digital image processing techniques to these images, such as edge-picking up、least-square fitting-curve algorithm, is to calculate the offset position/angle of optical axis of the high beams and the nodical offset of the unsymmetrical facular light and shade cut-off line of the low beams.
系统的图像采集工作是利用受光箱中的菲涅耳透镜在1米的测量距离上聚合前照灯灯光，由CMOS摄像头作为图像传感器件，照入灯光远光光斑和非对称近光图像，由嵌入式处理器对捕获的图像运用边缘提取、最小二乘法拟合曲线等数字图像处理技术计算出远光主光轴偏移角度以及非对称近光光斑明暗截止线拐点的偏移，实现了前照灯近光非对称光斑的自动测量。
Taking the laser diode line generator as the light source, the parallel laser screen unit was formed by using aplanatic cylindrical Fresnel lens with long focal length. By splicing seamlessly with multiple parallel laser-screen units, the large area laser screen can he constructed.
以半导体激光线发生器为光源，用长焦距消球差的柱面菲涅耳透镜形成平行激光幕单元，通过多个平行激光幕单元的无缝拼接可形成大面积靶面。
The motivation of this thesis is to investigate the beam pattern of the blue light-emitting diode and the light extraction efficiency of the surface-mount LED package. In order to modify the emission beam pattern of the blue LED as well as to improve the light extraction efficiency of the LED package, the total internal reflection from the LED chip has to be destroyed by a suitable geometric shape of the lens. The incorporation of various refractive indexes of the lenses with the index-match encapsulant materials is also expected to further reduce the Fresnel loss and internal reflection effect.
本论文主要研究动机是探讨蓝光发光二极体之发光光形与封装后之取光效率，为了要能达到发光二极体发光光形之设计并能有效提升表面黏著型构装之取光效率，因而利用透镜之几何外型形状来破坏全反射，并且以透镜与封装胶材之折射率相互搭配使用，以降低Fresnel 损耗及全反射，进而达成提升封装取光效率。
The results of computer simulation can provide theoretical basis for the fabrication of Fresnel lens.
模拟计算结果对多阶菲涅耳透镜的制作提供重要的理论指导。
A method of making the Fresnel lens is described.
本文还描述了制造菲涅耳透镜的方法。
Diffractive efficiency of Fresnel lens is important factor to evaluate the quality of Fresnel lens.
菲涅耳透镜的衍射效率是评价菲涅耳透镜质量的一个重要指标。
Four kinds of laser source are used to measure the diffractive efficiency of Fresnel lens.
使用四种不同光源，对菲涅耳透镜的衍射效率进行测试。
Fresnel Zone Plate antenna with high performance on wideband, lightweight, simple feed system and easy conformability, have been regarded as a replacement of the lens antenna in the millimeterwave imaging or used as the receiving element in microwave mobile communications.
菲涅尔平板天线由于其具有宽频带、重量轻、馈电简单和易于共形等优点，可替代透镜天线用于毫米波成像或用作微波移动通信中的接收天线单元等。
The effects of incident wavelength on diffractive efficiency of Fresnel lens are analyzed.
针对宽带折衍混合光学系统，分析不同入射光波波长对菲涅耳透镜衍射效率的影响。
Influence of phase errors upon the diffraction efficiency of the phase fresnel lens［J］.
位相误差对菲涅耳透镜衍射效率的影响［J］。
However, Fresnel lens is not a perfect lens and can induce several artifacts for the projected image.
但是，Fresnel lens毕竞不是理想的透镜，因而会造成投影影像的缺陷，这些缺陷被称为鬼影。
Fresnel lens is a lens branch, as it compared with other lens is small in size, light weight, the advantages of compact structure. At the same time, it will have no worse than other lens in Condenser and imaging performance. Therefore, it is widely used in various fields such as defense, aviation, space, industrial production and civilian.
菲涅尔透镜是透镜的一个分支，由于它同其他的透镜相比，具有体积小，重量轻，结构紧凑的优点，同时它拥有不逊于其它透镜的良好聚光性和成像性能，因此在国防、航空、空间、工业生产和民用等各个领域获得广泛的应用。
The Fresnel lens, also known as the dioptric lens, consists of a central glass disk and concentric glass rings or a central glass band surrounded by parallel glass rings.
一个在中心的玻璃圆片和与之同圆心的层层玻璃圆环，或者中间是一个玻璃带，两边是与之平行的玻璃带状环。
This article discussed the diamond cutting machining technology, and some Exploration, analysis and discussion are made on machining parameters used in diamond turning process of Fresnel lens and its impact on the element performance.
本文重点阐述了金刚石车削加工技术，并对菲涅尔透镜金刚石车削加工技术中的有关工艺参数及其对工作性能的影响进行了探索、分析和讨论。
WANG Ling, DING Zhi-hua, LI Na, Liquid crystal Fresnel zone lens for dynamic focusing in OCT.
王玲，丁志华，李娜。用于OCT 动态聚焦的液晶菲涅尔波带透镜研究。