| 摘要 |
PURPOSE:To obtain a lens position adjusting mechanism with simple structure by providing a helical spring between a laser beam source and a collimator lens, and a pointed setscrew at a side opposite to the beam source of the lens so that the tip of the setscrew can be abutted with a lens frame. CONSTITUTION:Light emitted from the laser source 1 is made incident on the collimator lens 2. The lens 2 is pressed on an optical axis in a direction separating from the beam source 1 with the helical spring 4, and the lens frame 3 is abutted with the pointed part of a positioning screw 6, then, is stopped. The lens 2 is separated from the beam source by loosening the spring 6, and approaches the beams source by loosening it. The collimation of emitted light can be performed by adjusting distance between the beam source 1 and the lens 2 by rotating the spring 6. Thereby, high degree of freedom can be obtained in design, and structure can be simplified. |
