| 摘要 |
PROBLEM TO BE SOLVED: To suppress the generation of heat in a method for focusing an optical flow emitted from a light source to an optical wave guide via at least one lens connected to an optical channel. SOLUTION: An optical flow is passed from a first optical lens 47 through a first optical channel L1 and guided to a member 43 for outputting and coupling heat, rays of visible light therefrom are deflected to a second optical channel L2 disposed by changing its angle changed with respect to the optical lens 47, the rays of visible light re first transmitted through a diaphragm disk 50 realized to selectively adjust a light intensity through the optical channel L2, guided to a second optical lens 48, focused from the lens to an illumination catheter 10 or first focused on the optical lens 48, then transmitted through the diaphragm disk 50 placed in a rear side by the lens and focused on the illumination catheter. |
