focal distance

The improvement and error analysis of measuring focal distance of thin lens

薄透镜焦距测定的改进及误差分析

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

Design of a long focal distance for quenching by laser beam

长加工距离的激光淬火光束的设计

Focal Distance Measurement by Using Fourier Transform of Double Rectangular Aperture

利用双矩形孔的傅里叶变换测焦距

Variation of focal distance of immersion focusing type probe with environment temperature

水浸聚焦探头的焦距随环境温度的变化规律研究

The Dynamic Measurement of the Thermal Focal Distance

一种测量动态热焦距的方法

On the determination of errors in thin lens ˊ focal distance

对测定薄透镜焦距误差的探讨

The Function of Diaphragm in Measuring the Focal Distance of Lens

光阑在透镜焦距测量中的作用

Shooting Distance , Focal Distance and the Effect of Appearance of Picture

摄距、焦距画面效果

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

On the principle of variable focal distance and the development for zoom lens

变焦镜的变焦原理与发展

A Simple Method to Measure the Focal Distance and Cardinal Points of a Compound Optical System

测量光具组焦距和基点位置的简便方法

Using Spectrometer to Measure with Precision the Focal Distance of Concave Mirror

用分光仪精确测定凹透镜焦距

Light signal visibility test back focal distance

灯光信号显示距离测试

Design of Annular Lens Dark Field Vertical Illumination System and Its Focal Distance Offset Characteristics

环形透镜暗场落射照明系统设计及其焦移特性的研究

Measurements of the focal distance of lens based on Lau effect in double grating

利用双光栅Lau效应测量透镜焦距

On the Focal Distance Formula of Lens in Varied Shapes

关于各种形状透镜的焦距公式

A study on the reconstruction bias originating from error of focal distance of X-ray source

射线源焦点距离误差对CT重建质量影响分析

Based on Lau effect in double grating , the focal distance of lens is measured .

根据计量光栅的特点，可以利用双光栅效应测量透镜焦距。

Determination of Correcting Focal Distance for Front Feed Four Horn Paraboloidal Reflector

前馈四喇叭抛物面反射器天线校正焦距的确定

A simple means of measured CW nd : yagrod thermal focal distance

一种测量CWNd：YAG棒热焦距的简单方法

The authors have reported two methods for measuring the efficient focal distance of the laser rod lenses .

提出几种计算和测量激光棒负透镜等效焦距的方法。

The Error Problem of Measurement of the Focal Distance of Thin Conves Lens by Conjugate Method

共轭法测薄透镜焦距中误差问题

Splashplate antennas with variable focal distance for forming the elliptic beam

椭圆波束变焦距溅散板天线

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。

It showed that the static thermal focal distance is shorter than dynamic thermal focal distance in the same input power .

结果表明在同样泵浦功率下，Nd：YAG棒动态下的热焦距比静态下的热焦距要大。

The principle of the spherical heliostat focusing with a long focal distance in the tower solar concentrating system

塔式球面定日镜远焦距聚光原理

Simulation and correction experiment on eye ametropia & determination of focal distance ( focal power ) of thin lenses

眼睛屈光不正的模拟与矫正实验&薄透镜焦距（光焦度）的测定

The degradation in quality of reconstructed image caused by the error in the focal distance of X ray source is discussed .

本文分析了焦点距离（射线源到转轴的距离）D的误差对重建图像质量的影响，计算机模拟与实验结果表明，该种误差引起重建图像降质不甚明显。

In measuring the focal distance of lens , the experimental accuracy is often affected by the poor quality in the formation of images .

在测量透镜焦距时，往往由于成像质量差而影响实验的精度。