Although there have been many application instances in the field of input / output device technology , we need an specific project and technology route aimed at an given application . in this thesis , we combine the introduction and analysis of relative technology to describe the accomplishment of a coordinate collecting device which is based on incremental rotary encoder . this device is an specific device applied to collect the corrdinate displacement of ground image ’ s three - dimensional model created by full digital photogrammetric station . cpld chip and vhdl are applied in this device to carry out the following work : phase control of the electrical pulse created by incremental rotary encoder , counting the number of electrical pulse , controling the state of signal processing circuit , exchanging data between this circuit and pci control 本文结合相关技术的介绍和分析,描述了一个基于增量式旋转编码器的坐标参量采集接口卡的实现,此接口卡是一种用于采集全数字摄影测量系统地面影像模型坐标位移量的专用设备,该设备采用cpld器件和vhdl语言实现增量式旋转编码器的脉冲信号鉴相和计数、信号处理部分的状态控制以及和pci总线芯片ch365之间的数据交换和通信功能,同时该设备的驱动程序基于wdm模式,并且配置有结构良好的动态链接库程序作为系统软件和驱动程序之间的数据和控制交互中间接口,能够方便地运行在windows98 / 2000 / xp操作系统平台上,具有实时性强、工作稳定、通用性较好和性价比高等特点。
The wave - deviation methods are concerned , basing on the relations between the wave - deviation and spherical aberration , wave - color - deviation and color deviation . after the equation of optical system , initial structure resolved , the glass catalog having been allocated in the computer , the original solution can be worked out for the doublet and air - spaced doublet , triplet and air - spaced triplet rapidly and precisely . after a little modification by the computer , the satisfied results will be obtained 论文由波像差与球差的关系，波色差与色差的关系推导出了波差法求解光学系统初始结构的方程式，再配以玻璃库程序，可以较快、较准确地求解出双胶合、双分离、三胶合、三分离物镜的初始解，然后再进计算机稍加校正，就可以得到满意的结果。
