| 摘要 |
Optical apparatus comprises at least one variable power lens 1 formed by a fluid-filled cavity 2 defined between two transparent walls 3, 4, at least one of which is provided by a flexible membrane 4. The apparatus further comprises a first pump 10 in fluid communication with the cavity 2 via a fluid conduit 5 for varying the volume of fluid in the cavity 2 in order to change the optical power of the lens 1. A second pump 20 is provided in fluid communication with the cavity 2 for varying the volume of fluid in the cavity 2 in order to change the optical power of the lens 1. The second pump 20 is in fluid communication with the cavity 2 via a detachable connection 7, so that the second pump 20 can be removed from the apparatus after adjustment of the optical power of the lens 1. |
