Indicates the distance encoder system . when attached to the dynax 7 , 5 , 4 or 3l the d lens makes features such as adi ( advance distance integration ) flash metering possible with program flash 5600 hs ( d ) , 3600 hs ( d ) as well as with each respective camera s built - in flash 表示距离编码系统将d镜头安装在dynax7 、 dynax5或dynax3上时，不管配合programflash5600hs ( d ) 、 3600hs ( d )或各相机的内置闪灯，皆可使用如adi (先进综合距离)闪灯测光等功能。
Be a card - carrying member , take a photo gray card along : it ' s much better for setting digital “ white ” balance , for accurate spotmeter exposures with slide film , for a photofinishing reference point for color - print film , etc 作一个随身带着灰板的人，经常随身携带一块灰板（ 18 %辉） ：这样很有利于你设定所谓的“白”平衡（使用数码相机） ，如果使用反转片拍摄的话可以用灰板来进行准确的点测光，在印制相片过程中可以作为片子里的一个参考点来进行色彩设定。
One end face of optical fiber sample sets on the carring - table of the micr - oscope is observed , selecting appropriate amplification , afterwards , take a ph - otograph with a ccd camera , then the picture was sent to the computer by the photograph - gathering card . the image is processed with a software automatic - ally , so this method can reduce artificial errors 具体方法是：将待测光纤制成品的一段样品横截面置于显微镜下，经显微镜放大，选择合适的放大倍数，然后用ccd摄像头摄像，利用图像采集卡将放大后的图像采集进计算机，利用图像处理技术，通过软件进行处理，从而实现处理过程的完全自动化，减少人为测量误差。
Then the optical path difference can be obtained with psi algorithm and to use the phase value for each pixel to determine a height value for each pixel . a primary advantage of psi is its high precision . with careful control of environmental conditions , measurement precision to the nanometer scale or below is possible with psi 它的基本测量原理是，通过摄像系统( ccd )接受到的干涉图中空间坐标已知的各个像素点的光强信号，在压电晶体驱动参考光程有序变化时，采集到多幅干涉图的光强信号，由移相干涉法，由光强值得到被测光程差值(位相值) 。
That is : the optical fibers which are to be tested will wind the same circle according to different radius or will wind the different optical fiber ' s circles according to the same radius , making the direction of incident ray side vibration as parameter , we have done the specific experiments and theory analysis to winding waste of quartz system , both refrac tion optical fibers and elastic - optic effect of optical fiber 即把待测光纤以不同的半径缠绕成相同的光纤圈和以相同的半径下缠绕成不同的光纤圈，以入射线偏振光方向为参数，对单模石英系双折射光纤的弯曲损耗与光纤的弹光效应进行了的具体的实验和理论分析。
