| 摘要 |
PURPOSE:To prevent structure from becoming complex by providing a tracking adjustment member with a means which is fixed to a cylinder member to specify the rotation around its axial line and further locks the rotation around the cylinder member so that it can be disengaged. CONSTITUTION:A rotating shaft 2 is energized by a spring 10 along the axial line A as shown by an arrow C, and an operating member 12 is energized as shown by an arrow C while the notched part 8b of the cylinder member engages a projection part 12b. When a tracking adjustment is made, the cylinder member 8 rotates associatively with the rotation of the operation member 12 around a pin 2a while a screw 18 is loosened, and a holding cylinder 1 which holds a lens L moves in the direction of an optical axis O1-O2 according to the rotation of a pin 2a atop of the rotating shaft 2; and a subject image formed through the lens L by said formation is projected on a well-known monitor means and the rotation shaft 2 is stopped where the sharpest subject image is obtained and the screw 18 is clamped to fix the cylinder member 8 to a fixed cylinder 16. |
