| 摘要 |
A variable reflector device, comprising a reflector ( 6 ) arranged to direct light from a light source ( 7 ) and a casing ( 5 ) containing the reflector ( 6 ), a portion of said casing ( 5 ) being transparent to light directed by the reflector ( 6 ). The reflector ( 6 ) is formed by a meniscus ( 2 ) at an interface between two immiscible fluids ( 3,4 ) contained in said casing ( 5 ). According to this design, the spatial distribution of light from the light source is changeable by changing the shape of the meniscus between the two fluids. Since a change in shape of the meniscus is effected by a displacement of fluids rather than of mechanical parts, the change in reflector shape can generally be performed faster and with less energy consumption than is the case with previously known designs. Further, a meniscus between two immiscible fluids can, due to the nature of fluids, take on several different shapes, which is not the case when a solid body reflector is utilised. |
