| 摘要 |
A switchable optical element is described, along with a method of manufacturing such an element. The switchable optical element ( 1 ) comprises a fluid chamber ( 2 ) including immiscible first and second bodies of fluid ( 20, 22 ) disposed relative to one another along an optical axis (A) of the element ( 1 ). The second body of fluid ( 22 ) is movable in a direction away from the optical axis (A) by electro-wetting action, giving the switchable optical element ( 1 ) a changeable transmissivity along the optical axis (A). The switchable optical element ( 1 ) is suitable for use as an optical attenuator, e.g. a shutter, filter or diaphragm, and can be conveniently used in place of mechanical alternatives in applications such as cameras, laser resonant cavities, projectors and devices for scanning optical record carriers. |
