| 摘要 |
PURPOSE:To quickly execute the adjustment of focus position on an image pickup element surface by moving at least a part of a lens group of a relay lens on an optical axis and adjusting tracking. CONSTITUTION:The tracking is adjusted by rotating a movable lens barrel 2, and moving the movable lens barrel by an adjustment screw part 8 in the optical axis direction to a fixed lens barrel 1 (change the lens space 10), that is, moving a movable lens group 4 on the optical axis. Generally, the focus adjustment for respective channels for red, green, and blue of a color resolving prism 23 is executed in a unit, so the respective channels are changed simultaneously in the same direction by the tracking adjustment of the relay lens 21, so the focus can be adjusted simultaneously. And, when the tracking adjustment is ended, a set screw 5 is tightened, the fixed lens barrel 1 and the movable lens barrel 2 are fixed, and the focus position is fixed. Thus, the tracking can be easily and quickly adjusted and the error, etc., of the assembling of a color resolving system can be easily corrected. |
