| 摘要 |
A camera apparatus ( 10 ) has a zoom lens ( 12 ) having a zoom focus setting that is adjustable over a range of focus values and control circuitry for generating a variable voltage potential according to the zoom focus setting. A flash illumination apparatus ( 20 ) has a light source ( 26 ) and a variable focus lens ( 24, 40 ), the variable focus lens ( 24, 40 ) having a first and a second fluid ( 42, 44 ) in a chamber ( 36, 46 ), the fluids ( 42, 44 ) having different indices of refraction and being non-miscible and in contact over an interface surface ( 54 ) with variable shape. An electrode ( 50 ) applies a variable voltage potential within the chamber ( 36, 46 ) for shaping the interface surface ( 54 ) according to the zoom focus setting.
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