Abstract: A camera platform for installing a camera in the inside of an automobile is designed in such a manner that even when a camera is rotated to capture rearward images, the camera does not interfere with a room mirror. Since the shaft of a rotation portion is divided into a rotation shaft and a ball shaft, an arm part of the camera platform is rotated without the necessity of rotating the camera main body in the vicinity of the room mirror, so that it becomes possible to carry out rearward image capturing operations. Moreover, since the rotation shaft of the arm part is designed to be offset from the camera attaching center line by 20 mm, it becomes possible to prevent a cable extending from above the camera from contacting with an arm attachment part of a mount, even when the camera is rotated.

Abstract: A projector of rear-projection type including a light source that outputs a laser beam and a scanner that scans a screen with the laser beam. When a laser beam with energy exceeds an accessible emission limit due to failure of the light source or the scanner, at least one optical member located in an optical path of the laser beam is arranged so as to be broken or altered in quality and to prevent or discourage the beam with energy exceeding the accessible emission limit from being output from the screen.