| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable-focus lens which can be manufactured easily and further, which can limit the variation in the internal pressure of a lens, while keeping the lens structure rigid when there is temperature change. SOLUTION: The invention relates to the variable-focus lens (60) for focusing light rays in light paths, passing through the lens along an optical axis (Δ). The lens comprises an arrangement of first and second immiscible liquids (67, 68) that have different refractive indices and that are in contact with each other, over a movable refractive optical interface (69); a volume of gas (72) that comes into contact with one of the liquids and retention measures (70, 74) for keeping the volume of gas away from the light paths of the light rays, passing through the lens for focusing. COPYRIGHT: (C)2007,JPO&INPIT |
