| 摘要 |
PROBLEM TO BE SOLVED: To enable selection of a filter suitable for an environment to install a camera by arranging the camera at the opening part of a cylindrical casing which can be arbitrarily rotated, providing the cylindrical casing with plural filters and rotating the cylindrical casing. SOLUTION: External light s passed through the window of a protecting filter 6 on an external casing 2, made incident through any one of filters 8, 9 and 10 on an internal casing 3 to a lens cylinder 5 and photographed by a camera substrate 4. By rotating a rotary manipulator 7, the internal casing 3 is rotated inside the external casing 2. The camera base body 4 and the lens cylinder 5 are fixed to the external casing 2 and do not depend on the rotations of the internal casing 3. Therefore, by rotating the internal casing 3, the filters 8, 9 and 10 can be selectively located between the protecting filter 6 and the lens cylinder 5. By rotating the internal casing 3, the filters 8, 9 and 10 can be selectively exchanged. |
