| 摘要 |
PROBLEM TO BE SOLVED: To surely shield light from outside a visual field made incident on a lens barrel of an image pickup device with a simple constitution. SOLUTION: In this image pickup device, a lens 20 is engaged to a bottom part of a front lens barrel 11. Furthermore, a projection part 80 is formed to have a stop mechanism part attached to it in the front part of the front lens barrel 11. An aperture 82 is formed at the bottom of the front lens barrel 11 and a feeding screw for adjustment of focus is integrated in this part. Then, engagement parts 92 and 93 provided with dovetail structure to retain anti- reflection sheets 100 and 101 are formed on both sides of the aperture 82. A recessed part 81 where a supporter is installed to support a mobile frame for focusing is formed inside the front lens barrel 11 in the upper right part. Engagement parts 90 and 91 provided with dovetail structure to retain the anti- reflection sheets 100 and 101 are formed on both sides of the recessed part 81. The anti-reflection sheets 100 and 101 are sheet state members constituted from material with a small reflectivity, installed along the inner wall of the front lens barrel 11 and their end parts are fixed by engagement parts 90 to 93.
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