| 摘要 |
The lens comprises a basic lens body (18) which is covered by a first layer (14) made from a solid persistently electrochromic material, and a second layer (12) made from an ion-conducting material. On their outside, the layers each bear an electrode (10, 16) for generating an electric DC voltage field. The electrochromic material becomes coloured in accordance with the field strength. By setting the DC voltage at the electrodes (10, 16), it is thus possible to vary the optical absorption of the lens. Such controllable lenses are used chiefly as spectacle lenses for spectacles which have a variable light transmittance. <IMAGE> |
