In order to measure the field of view matching of digital binoculars , the depth of optic axis parallelism and field of view matching are measured respectively . the collimator and pre - set lens are used to measure the depth of parallelism of optic axis . field of view meter is used to measure the field of view of binoculars and camera 为了检验数码望远镜的视场匹配度,提出了采用平行光管和双管前置镜的组合测量光轴平行度以及采用视场仪测量数码望远镜的望远镜和数码相机的视场大小的方式,并对数码望远镜的视场匹配度与望远镜和数码相机的视场大小关系进行了理论推导,导出了数码望远镜的视场匹配度测量的实际计算公式。
By using a reflector and two pentaprisms , one beam of light is separated into two parallel beams , then respectively they are received by two optical systems of the large scale photoelectric theodolite with certain imaging d - value which correspondingly represents each optic axis parallel error of these two optical systems 方法是利用一块反射镜和两块五棱镜将一束准直光束分光成两束平行光束，大型经纬仪的两个光学系统分别接收这两束平行光，两束平行光所成像的脱靶量差值即为两光学系统的光轴平行度。
