| 摘要 |
<p>A head-mountable display system comprises a sensor (5) for receiving infra-red radiation from a scene and a display (6) in which an image of the scene can be viewed. A video camera (9) is provided to enable visible light from the scene to be imaged on the display (6). The user of this display system is able to select the required image by means of a switch. This invention enables the user to view either the infra-red image or the visual image of his surroundings as desired without the need to move the display (6) clear of his line of sight, as was necessary hitherto. <MATH></p> |
