菲涅耳透镜

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］。

An optical element such as a rear projection screen for an image display device comprises at least two substantially rigid sheet members each having a first major surface and a second major surface providing a plane of incidence and a plane of emergence, respectively, through which light is transmitted sequentially. A first sheet member comprises a Fresnel lens, and a second sheet member comprises a lenticular lens array on each of the major surfaces thereof.

一种光学元件，例如用于图象显示装置的背投式屏幕（1），包括至少两个基本为刚性各具第一主表面（21；31）和第二主表面（22，32）的板部件（2；3），分别提供顺序穿过光线（10）的入射面和出射面，第一板部件（2）和第二板部件（3）在其各个主表面（31，32）上分别包含一个菲涅耳透镜（24）和一个双凸透镜阵列33，35。

The diffractive efficiency is measured and the errors are analyzed.

测量了菲涅耳透镜的衍射效率并分析产生误差的原因。

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。

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。

. As a result, there is obtained a square or rectangular sheet 6 of Fresnel lens having the prescribed size as shown in FIG.

第8条第。作为一个结果，是获得了正方形或长方形板材6菲涅耳透镜具有明尺寸显示图。

The plane of emergence on the second major surface of the first sheet member includes the Fresnel lens formed of a radiation curable material.

第一板部件的第二主表面的出射面包括由辐射可固化材料形成的菲涅耳透镜。

Step Fresnel lens of high diffractive efficiency is fabricated by ion beam etching.

使用离子束刻蚀法成功制作高衍射效率16阶菲涅耳透镜。

. 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 the second chapter,I calculate the diffractive efficiency when there arealignment error,depth error of the step and the work was elength error,based on the theory ofthe fresnel lens.

第二部分文章在介绍菲涅耳透镜设计原理和衍射效率计算的基础上，重点分析了存在各种加工误差时候的衍射效率的计算情况。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。