查询词典 lens

The status and application of AGRIN lens are introduced. Its merits comparing with the aspherical lens are briefly presented. The manufacture technology of AGRIN medium is discussed.

综述了AGRIN材料的发展历史，现状及其在镜头设计中的应用，简述AGRIN材料在光学设计中的应用和它与非球面相比的优点，探讨AGRIN材料的制造问题。

RESULTS: In the process of VEP optometry, 75 ametropic eyes were corrected through spherical lens, while 52 ametropic eyes were corrected by cylinder lens.

为了分析VEP验光结果的准确性及应用价值，对比其与目前常用的电脑验光方法之间是否存在差异，我们对50例86眼依次行电脑验光和VEP验光，对各项结果进行比较分析。

The results shown that:(1) Bufo raddei Strauch tadpole was capable of lens regeneration, which originated from the epithelial cells at dorsal iris margin by depigmentation.(2) Depigmentation of Bufo raddei Strauch during lens regeneration was by two methods: First, pigment granules initially dispersed all over the cytoplasm were moved towards the periphery of the cell, and then were directly taken up by the amoeboid cells. Second, pigment granules in a cell were first crowded in a mass, surrounded by a membranous structure in the cytoplasm, which were eventually discharged as a mass from the cell.

结果表明：花背蟾蜍蝌蚪(1)具有晶状体再生的能力，其晶状体的再生来源于虹膜背缘的上皮细胞；(2)虹膜背缘去色素是转分化的前提，主要有两种方式：一种也是最主要的方式是在晶状体被摘除后虹膜外侧产生巨噬细胞，巨噬细胞吞噬虹膜色素上皮细胞中的色素颗粒；另一种方式是虹膜色素上皮细胞自身释放色素颗粒；(3)电镜观察发现虹膜色素上皮细胞转分化过程中线粒体有明显变化，核糖体增多，粗面内质网增多，晶状体纤维分化过程中细胞核逐渐凝聚。

The apparatus includes an optical fiber biconic lens disposed on an end of the optical fiber such that the optical fiber and the biconic lens define an optical axis.

该装置包括一个定位在光纤(44)一端上的光纤双锥形透镜(46)，使得光纤和双锥形透镜限定光轴。

Methods Transmission electron microscope was used to observe the apoptotic morphology of the lens epithelial cells in 4 cases with senile cataract and in 2 mice with congenital cataract. The comparisons were made between the cataractous and normal transparent lens epithelial cells in human being and mice.

用透射电镜观察4例老年性白内障患者及2例先天性白内障小鼠晶状体上皮细胞凋亡的超微结构，并分别与同类正常晶状体上皮细胞超微结构进行比较。

The C18 known sequence, whose sequence had been known but function remained unknown, was expressed in cataractous lens epithelium but was not expressed in normal lens epithelium.

序列已知而功能未知的C18已知序列在白内障晶状体上皮有表达，但其在正常晶状体上皮中无表达。

Among the 3 novel sequences, C24 sequence and C57 sequence were expressed both in cataractous group and in normal group; C24 sequence was expressed higher in cataractous group than that in the normal group, but C57 sequence had no significant difference in normal and cataractous group; C40 sequence was expressed in the cataractous lens epithelium but the expression in normal lens epithelium was not seen.

三个新序列中，C24号和C57号序列在年龄相关性白内障和正常晶状体上皮细胞中均有表达，C24号序列的表达增高；C57号序列在正常组和白内障组中的表达无差异。C40号序列在年龄相关性白内障晶状体上皮细胞中有表达，但其在正常晶状体上皮细胞中未见表达。

Firstly, the article introduces the definition of error of lens center in the old and new national standard, and summarizes three present systems that can confirm the lens center. Then we discuss the theory and formula of self-collimation catoptric method. On the basis of self-collimation theory, some apparatuses were designed (including internal-focusing center scope and center error measure instrument etc).

首先介绍了新旧国家标准关于透镜中心误差的定义，归纳和总结了目前物镜装校定中心的三个体系，讨论了光学系统中心误差自准反射法测量原理、公式和测量方法，以及根据自准反射法测量原理而设计开发的定中心仪器——内调焦定心仪、中心偏测量仪等设备。

TEC part affected Gaussian beam waist radius,Coreless part worked on the space between beam waist and thin lens,and GRIN part acted as thin lens,in which focal length was determined by fiber index distribution parameter g.

推导了出射高斯光束的束腰半径和工作距离的解析表达式，进而对该光纤透镜做了数值模拟，讨论了无芯光纤和GRIN多模光纤的长度对光纤透镜参数的影响。

And this paper also shows the structure and parameters of the optical system. The Xenon light of super high voltage is used as interferential source. The position of it is on the focus of the reflector of ellipsoid surface. After reflecting, its lights form a collective point . This point and objective focus of collimation lens are superposition. Though the collimation lens, the beam of light become parallel lights. Then though the Coude Reflector and radiation system of special prism, the lights become a beam of light with 3 ° emanative angle.

该光学系统选用超高压氙灯作光源，使其位于椭球面反射镜的一个焦点上，发出的光线经椭球面反射后所形成的汇聚点与准直负透镜组的物方焦点重合，光束经准直系统后变为平行光束，此平行光束再经库德反射镜和特殊发散棱镜系统，形成具有3°发散角的发散光束，用来干扰敌方设备。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。