| 摘要 |
Illumination of objects, partic. at sea, takes place repeatedly on an intermittent basis, using a rotating ultra-violet light source which sweeps around the complete horizon. The source speed of rotation is adjusted either so that the reflected light appears to be blinking to an observer, or is continuous. Light from the source, prior to transmission, is made to pass through a medium, such as glass or similar, in which visible light is absorbed to a considerable extent. The colour carried by the objects serves a specific purpose, such as camouflage when illuminated with visible light, or wave-conducting or locating when illuminated with ultra-violet light. The ultra-violet light emitted is within the range of 360-370 nm. A piston, tube or similar encapsulation device is fitted around the ultra-violet lamp to ensure even light diffusion. |
