| 摘要 |
This method changes the colors of optical fiber bundles (1, 3) contained in or surrounded by an endoscope and colored by radiation or the like, by introducing light rays of the visible light range. The visible light can be produced from a light source (5) of the endoscope. The visible light can be introduced through objective lenses (2, 20) or from an eyepiece lens (4) side through a heat-proof filter, a member transparent to heat radiation, a heat-proof liquid circulator or the other heat excluding device (11). |
