Abstract
We demonstrate a flat microlens that exhibits hermaphroditic focusing properties. When the input polarization is parallel (perpendicular) to the liquid-crystal directors, the lens exhibits a positive (negative) focal length. To select the proper polarization, we could rotate the polarizer (or the lens) mechanically or by use of an electrically controlled twisted nematic liquid-crystal cell. Details of the lens structure and of the device's fabrication and performance are described.
Original language | English |
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Pages (from-to) | 376-378 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 30 |
Issue number | 4 |
DOIs | |
State | Published - 15 Feb 2005 |