convex lens

Conclusion Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

结论配戴低度凸透镜可降低小学生近视的发生率.

Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

配戴低度凸透镜可降低小学生近视的发生率.

In this paper, a measuring method of convex lens foci in collimator is given.

介绍一种测量平行光管内凸透镜焦距的测量方法。

The outer shell of the liquid-filled convex lens is provided with two structures; a two-piece combined type structure and an integral type structure.

充液凸透镜的外壳，分两片合成式和整体式两种结构；

Measurement of Refractive Index of Liquid with Liquid Thin Convex Lens

用液体-薄凸透镜组测定液体折射率

Two kinds of convex lens which make parallel rays converge to the focal point are given.

本文给出两种能使平行光严格聚焦于一点的凸透镜.

Research on Correct Operation in Measuring Radius of Even Convex Lens with Newton Ring

用牛顿环测平凸透镜曲率半径的规范操作研究

Embossed film Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

（带半圆凸透镜层的彩色电视录象用）浮雕影片配戴低度凸透镜可降低小学生近视的发生率。

For the optics system of thin convex lens, intensity distribution is numerical simulation;

最后以薄透镜系统为例，数值计算了该方向上的强度分布；

The convex lens focal distance measurement method of imaging technology with CCD

实验室正透镜焦距测量方法之CCD成像技术的运用

Two kinds of convex lens which make parallel light rays converge to the focal point are given.

本文给出两种能使平行光严格聚焦于一点的凸透镜。

Objective To investigate the effect of lower degree convex lens on preventing myopia of primary school students.

目的探讨低度凸透镜预防小学生视近的效果。

The conversion for beam characteristics of high power lasers produced by multimode fiber through convex lens

用单透镜变换由多模光纤出射的大功率Nd：YAG激光束的特性

For medium and small spherical convex lens into the optical disk or a single piece polishing.

用于中、小光学球面凹凸透镜的成盘或单件抛光加工。

Error of the Non-ideal Thin Convex Lens Focus Measures

非理想薄凸透镜焦距测量的误差

Large convex lens produces image that is viewed through the eyepiece.

通过目镜观察物体图像的大的凸透镜。

A convex lens causes rays to converge on a single point, the focal point.

会聚透镜使光线会聚于一点, 即焦点.

The convex lens and planoconcave mirror thermal lens compensation methods are proposed and applied to a high power pumped Tm: YAP laser.

最后提出了凸透镜和平凹镜两种热透镜补偿方案，在实验中对这两种方案进行了验证。

The Analysis of Uncertainty in Thin Convex Lens's Focal Length Measurement

薄凸透镜焦距测量的不确定度分析

Conjugate method is an accurate, simple and convenient method to measure the focal distance of thin convex lens.

共轭法是一种较为准确和简便的测量薄透镜焦距的方法。

A convex lens is used to concentrate rays of light.

凸透镜用于聚集光线.

He polished the convex lens of his telescope.

他擦亮了凸透镜的望远镜.

Having greater curvature on the concave side than on the convex side . Used of a lens.

凹凸的凹面曲率大于凸面曲率的.

Observation of the effect of lower degree convex lens on prevention of myopia

低度凸透镜预防近视效果观察

Methods Hypermetropia and myopia were induced by convex lens in front of eyes of 32 subjects.

方法在正常眼前放置正、负球镜,人工诱导单纯性远视、近视性屈光参差.

A single convex lens is used to produce an enlarged image.

能够产生放大图像的单个凸透镜。

The effects of spherical aberration on measuring focus of thin convex lens with object distance image distance method

球差对物距像距法测薄凸透镜焦距的影响

Based on third-order aberration theory, a null testing system using compensator for an off-axis convex hyperboloid mirror is designed, it avoids that the aperture of auxiliary lens is overmuch larger when the Hindle test is applied.

从三级像差理论出发，设计出了离轴凸双曲面反射镜的Null补偿检验系统，克服了采用Hindle球检验口径过大的问题。

There are six various plane and concave-convex lens.

备有六种不同面型和凹凸透镜.

Error Analysis and Ways to Make fewer in Measuring Focal Distance of Convex Lens

凸透镜焦距测量的误差分析和减小方法