| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid crystal lens of high performance capable of changing its focal length in a wide range and to provide its driving method and device. SOLUTION: The liquid crystal lens has a hologram liquid crystal element comprising a liquid crystal giving the phase change by which a wave front is formed in a blaze hologram shape to a light beam transmitted through the liquid crystal itself and a segment liquid crystal element comprising a first electrode divided corresponding to the blaze hologram shape, a second electrode opposed to the first electrode, and a liquid crystal giving phase change to a transmitted light beam by applying voltage to the first and the second electrodes and is disposed coaxially with the hologram liquid crystal element. Its driving method and device of the liquid crystal lens are also provided. COPYRIGHT: (C)2004,JPO
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