Liquid crystal optical element and method for manufacturing thereof
US7619713B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Nov 8, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is directed to the provision of a liquid crystal optical element that is inexpensive, has an ideal refractive index profile, and functions as a high-performance gradient-index lens. The liquid crystal optical element (100) includes a first planar substrate (101), a second planar substrate (105), a liquid crystal (106) provided between the first and second planar substrates, an electrode pattern (200) formed on one of the first and second planar substrates and having a plurality of regions (201 to 215) each for varying an effective refractive index for a light beam by a respectively different degree, and a counter electrode (108), formed on the other one of the first and second planar substrates, for applying voltage with respect to the electrode pattern, wherein the refractive index for a light beam varies with the square of the distance from the center of the liquid crystal optical element along a radial direction across the liquid crystal optical element when the voltage is applied between the electrode pattern and the counter electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.