| 摘要 |
PURPOSE:To facilitate the direction of two optical systems by coinciding straight line parts for entering visual fields of two monitor cameras and correcting the directivity. CONSTITUTION:In order to coincide the direction of a monitor camera 11 out of the 1st and 2nd monitor cameras, a detector 15 composed of a long rectangular piece and a direction recognizing body 17 composed of a needle for moving freely along the straight line parts 16 of the detector 15 are used so that either one of the straight line parts 16 at side edges of the detector 15 can enter the visual fields of the monitor cameras. Since the straight line parts 31 and 32 of an image exist extensively with some angle, lock screws 22 and 23 is loosened, and the monitor camera 11 is rotated, after which the direction recognizing body 17 is parallel-displaced along the straight line part 16 of the detector 15. When the needles 33 of the image move twice in the different directions, it means that the directivity with the optical axis of the optical system formed by one monitor camera is shifted by 180 deg. with respect to the directivity of the other monitor camera. The case where the needles 33 of the image move twice in the same direction means that the directivities with the optical axes of both monitor cameras as a center are equal. |
