| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens in which an optical path or a focal point is made variable by adjusting polarity, direction, intensity, and so forth of a magnetic field. SOLUTION: The refractable lens is mainly constituted of a transparent container, a plurality of transparent fluids sealed therein, and a device externally applying the magnetic field to the fluids using a magnetic pole. In this constitution, the sealed fluids to be used are selected according to the combination of one actuated by the magnetic field and having the nature of moving deformation (for example, ionic liquid) and liquid insensitive thereto. Thus, the distribution of the ratio of both the fluids in the thickness direction of a planar lens is gradually varied and the refractive state of transmission light is varied, by externally generating the magnetic field with an electromagnet or the like and adequately controlling the polarity, the direction, and the intensity to supply respective magnetic poles therewith, thereby making the optical path or the focal point variable. COPYRIGHT: (C)2007,JPO&INPIT
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