焦距

实验室正透镜焦距测量方法之CCD成像技术的运用

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

一种测量CWNd：YAG棒热焦距的简单方法

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

把相机的焦距调到被拍对象上。

Focus the camera on the subject .

这副双筒望远镜的焦距不对。

The binoculars were not in focus .

这部相机有两个焦距。

The camera has two focuses .

比较贵的照相机有可调焦距

More expensive cameras have adjustable focusing .

CO2激光加工机连续可变焦距光学系统

The Continuous Zoom Type Optical System of the CO 2 Laser Processing Machine

基于CCD的航空相机镜头焦距自动测量系统

Auto-measuring system of aerial camera lens basing linear CCD sensor

透镜焦距的CCD图像测量系统

Image Measurement System of Lens Focal Length with CCD Camera

利用线阵CCD实现航空相机镜头焦距的自动测量

Auto - measuring System of Aero - camera Lens Focus Using Linear CCD

John的照片没对准焦距，我看不清他的脸。

This photo of John isn 't in focus ; I can 't see his face clearly .

对系统进行标定计算，指出标定参数等效焦距f，两摄像机光心的距离d，这些参数为系统内部参数，可以通过相对不同的世界坐标进行标定，即相对标定。

These parameters is the internal parameters in the system , and can be calibrated through different world coordinates .

利用moire技术测量透镜组焦距

Focal length measurement of collimating lens using morie technique

对于空间耦合泵浦固体激光器的光纤耦合LD的输出光束，使用短焦距的透镜要优于使用长焦距的透镜。

For the space coupling of pumped solid-state laser , the short focal lens are excelled long focal lens .

在原来光具座测量透镜焦距的装置基础上，用CCD代替人眼作接收器时，正确判定焦面是实验的关键。

Linear CCD is used as receiver on behalf of eyes on the basis of originally experimental equipment measuring the focal length of lens .

否则设置3D动画中的摄影机的角度、焦距、方向与实拍时一致将会是很慢的过程。

If not then it 's a very long slow process of setting the viewing angle and the zoom of the camera and shifting it 's orientation until it matches .

CCD测量LD端面抽运Nd∶GdVO4固体激光器热焦距

Determining the thermal lens focus of LD end-pumped Nd ∶ GdVO_4 solid-state laser with CCD detecting method

利用双光栅Lau效应测量透镜焦距

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

由于取样定理的限制，常规的基于快速傅里叶变换（FFT）光束传输模拟算法不能进行任意焦距聚焦光束的传输过程的模拟。

The traditional beam propagation algorithm based on Fast Fourier Transform fails to give right results due to the limitation of the sampling theorem .

太阳能采集中使用的CPC集光器用于对LED光源光束角度的调整，而FF双焦距光学系统可以提高面光源如LED阵列的光学效率。

CPC concentrators are used to adjust the viewing angles of LED , and FF system could improve the efficiency of surface light source like LED-arrays .

提出了一种以线阵CCD固态传感器取代读数显微镜的航空相机镜头焦距测量系统。

An auto measuring system of aerial camera lens is presented , which substitutes linear array CCD sensor for reading microscope to measure the focus of aerial camera lens .

给出了一种焦距测试方法，用于测量数码相机电荷藕合器件（CCD）与传统光学相机相等效的焦距。

This paper proposes a new method for estimating the equivalent focal length of digital camera ( DC ) charge-coupled device ( CCD ) to the traditional optical camera .

从实验的角度，对掺杂为0.5%的Nd∶YVO4晶体的热焦距进行实际测量，得出了不同泵浦功率下的热焦距数值。

Thermal focal length of Nd ∶ YVO 4 crystal is measured , and the result is obtained in experiment .

基于三焦距张量及BMA的运动估计和补偿

Motion estimation and compensation based on trifocal tensor and BMA

在轻武器光学瞄具性能参数测试系统中，当CCD摄像系统倍率很高、焦距很短时，焦点便会出现模糊现象。

In the small arm optical sighting performance parameter testing system , the focus will be blurred when the CCD camera system magnification is high and the focal length is short .

计算Top-hat端面抽运晶体热透镜焦距的改进方法

Improved Method of Calculating Thermal Lens Focal Length in " Top-Hat " End-Pumped Solid-State Lasers

从理论和实验上研究了不同焦距下泵浦能量以及透镜与光纤间距对多模光纤中的SBS能量反射率和脉冲波形的影响。

The influences of pump energy , focal length and distance between fiber and lens on SBS reflectivity and waveform in multimode fiber are investigated theoretically and experimentally .

介绍了含有棱镜系统的数字光处理器（DLP）投影仪连续变焦距远心镜头的设计。

The continuous telecentric zoom lens for a digital light processor ( DLP ) projector with prisms is presented .

得到谐振腔两臂中的光模参数bt，b2及束腰尺寸wt，w2随激光介质的焦距ft的变化关系。

Relationship of laser mode parameters b_t , b_2 and beam waists w_t , w_2 varies from focal length of thermal lens were obtained .

设计两种测量CCD等效焦距的实验方法，分别利用物像距离与物像长度的比例关系和平行双目成像原理，得到与CCD焦距极值对应的等效焦距。

It designs two estimating experiments to obtain the focal length value corresponding to the minimum CCD focal length , from which the ratio of the CCD focal length to its optical equivalent is derived .