| 摘要 |
PURPOSE:To obtain a TV camera which provides a good total insulating performance with a wide field of view, by forming an insulating layer in the perimeter of the TV camera housed in a closed container partly imaged. CONSTITUTION:An internal container 3 which is equipped with a TV camera 1 and a heater 11 while a sealing section 10 is formed at a portion through which a cable 8 or the like runs is mounted in an external container 2; a vacuum laminate heat insulating material is mounted at a space between the container 2 and the container 3 and the cable 8 or the like runs therethrough, where a sealing section 9 is formed. A transparent member 6 partially adheres to the inner wall of the container 3 and an opening of the container 2. Then, a transparent member 5 adheres to the inner wall of the opening of the container 2 to seal up these portions completely. Evacuation is made with a vacuum pump or the like at a space between the containers 2 and 3 and the space is closed. Light passing through the transparent members 5 and 6 and the vacuum layer 7 is imaged by the TV camera 1 and an image is sent to a monitor TV with the cable 8 or the like. The temperature of the TV camera 1 is raised with a heater 11 above a min. service temperature.
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