| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic endoscope system capable of obtaining sufficiently bright images without affecting observation with special light even when the system is in a distant view observation condition in which light quantity is short. SOLUTION: In a close view observation mode, image pickup is executed by irradiating a body cavity with a first blue narrow band light Bn1 and a first green narrow band light Gn1. An exposure quantity is detected from image pickup signals obtained by the image pickup. If the exposure quantity is less than a predetermined value, the close view observation mode is switched to a distant view observation mode. In the distant view observation mode, the image pickup is executed by irradiating the body cavity with a second blue narrow band light Bn2 obtained by increasing a half value width of the first blue narrow band light Bn1 and a second green narrow band light Gn2 obtained by increasing a half value width of a first green narrow band light Gn1. As described above, since the second blue narrow band light Bn2 and the second green narrow band light Gn2 have a half value width wider than that of the first blue narrow band light Bn1 and the first green narrow band light Gn1 respectively, light quantity shortage in the distant view observation can be solved. COPYRIGHT: (C)2012,JPO&INPIT |
