| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic endoscope which can efficiently and accurately prevent the dew condensation over a cover glass mounted on a solid image sensor with an inexpensive structure. SOLUTION: A heater 25 is mounted on a reflection surface 24c of a prism 24 making up an image pickup device 17 of the electronic endoscope 10. When a power source of the electronic endoscope 10 is turned on, washing water or air is sprayed onto an observation window 20 or on other occasions, a CPU 44 turns on the heater 25 through a heater driver 46 and then off after a time passes enough to ensure that the outer and inner surfaces 30a and 30b of the cover glass 30 reach a thermal equilibrium. COPYRIGHT: (C)2007,JPO&INPIT
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