| 摘要 |
PURPOSE:To improve the dimensional accuracy of respective lens groups such as an objective lens group, a variable power lens group, a condensing lens group and a focus lens group as for a lens barrel used for the inner focus lens of a VTR and to make the assembling property thereof excellent. CONSTITUTION:By integrally holding a first guide pole 15 and a second guide pole 10 by a condensing lens frame 24, holding a variable power lens frame 17 on an objective lens side and holding a focus lens frame 32 on a camera side, the dimensional accuracy such as the concentricity or the inclination of the guide pole is easily derived and the dimension thereof is easily controlled. Besides, the dimensional accuracy such as the concentricity or the inclination of the lens group is enhanced, the number of parts is reduced and the assembling property is made excellent. |
