| 摘要 |
A security camera assembly comprises a camera (10) which is adjustable to be sensitive to both visible light for producing monochrome and/or colour images and to non-visible radiation for producing monochrome images. The camera (10) is located within a housing (12) whose position is adjustable about two mutually perpendicular axes (i.e. pan and tilt) to define an area to be monitored by the camera (10). Illumination means (18) are mounted on the housing (12) and therefore move with the camera (10) to illuminate the area monitored by the camera. The illumination means (18) comprises a source (38, 36') of visible light and a source (38) of non-visible (e.g. infra-red) radiation to which the camera (10) can be adjusted to be sensitive. Either the source (38, 36') of visible light or the source (38) of non-visible radiation can be selected for illuminating the area monitored by the camera (10). |
