公开(公告)号：US5140458A

公开(公告)日：1992-08-18

申请号：US329898

申请日：1989-04-27

申请人： Kazutoshi Takagi ,  Nobuaki Kitazima ,  Yoshitaka Torii

发明人： Kazutoshi Takagi ,  Nobuaki Kitazima ,  Yoshitaka Torii

IPC分类号： A61B3/13 ,  A61B3/12 ,  G02B7/08 ,  G02B7/10 ,  G02B21/00 ,  G02B21/06 ,  G02B21/08

CPC分类号： G02B21/082

摘要： An optical illuminating and observing apparatus having a first drive system for changing the magnification of the apparatus and a second drive system for changing the illuminating field of the apparatus. The two drive systems can be operated either in an interlocking relationship or independently of each other. In a preferred embodiment, a clutch-gear is used to connect and disconnect the two drive systems to or from each other.