| 摘要 |
PURPOSE:To simplify the assembling work by moving a lens moving frame, which is provided with a part to be driven which is brought into contact with and is engeged with a driving member, in the direction of the optical axis through the driving member which is rotated in a plane parallel with the optical axis. CONSTITUTION:Focusing, variable power, correcting, and fixed lens groups A, B, C, and D, a diaphragm 34, a master lens groups, and a filter 35 are attached to provide a lens substrate 22 for prescribed operations of focus operation and zoom operation. A focusing lens holding frame 38 is fitted to the inside cylinder side of a holding ring 39 formed in the lens substrate 22 as one body and is held freely turnably by a connecting member 41. End faces of the focusing lens holding frame 38 and the holding ring 39 which are slid on each other are provided with cams (which are not shown in Fig.) respectively, and the focusing lens holding frame 38 is turned to extend the focusing lens holding frame 38 in the direction of the optical axis. |
