| 摘要 |
PROBLEM TO BE SOLVED: To provide varifocal spectacles which have optical elements of solid crystal with variable optical characteristics formed on a surface of a transmissive substrate at equally spaced cycles and to which vibrations are applied from outside. SOLUTION: The varifocal spectacles have the optical elements of a solid crystal film with variable optical characteristics formed at equally spaced cycles and a means of applying vibrations from outside on at least the one transmissive substrate surface supported on a spectacle frame 4, and the focal length is varied by varying the optical characteristics by applying external vibrations. COPYRIGHT: (C)2007,JPO&INPIT
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