| 摘要 |
A variable focus system ( 100 ) that includes an electrovariable optic (EVO) ( 108 ) and a controller ( 112 ) operatively configured for changing the focal configuration of the EVO. The EVO includes a plurality of movable optical elements ( 164 ) that may be moved substantially in unison with one another so as to change either the focal length (f) of the EVO, the direction of the focal axis ( 132 ) of the EVO, or both, depending upon the needs of a particular application. The variable focus system may be used in conjunction with an image source ( 116 ) to construct a 3D floating image projector ( 500, 540, 560, 600 ) that projects a series of 2D image slices (IS 1 -IS 7 ) of a 3D image onto corresponding respective image planes (IP 1 -IP 7 ) in succession rapidly enough that a 3D floating image ( 120 ) is perceived by a viewer ( 104 ).
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