Optical element and method for manufacturing the same
US12222532B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | May 24, 2024 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | May 24, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element includes a three-dimensional structure having a curved surface; and a retardation plate bent along the curved surface. The retardation plate includes a transparent substrate and a liquid crystal layer formed over the transparent substrate. The retardation plate has a slow axis and a fast axis. A glass-transition temperature, Tgne, in a slow axis direction of the retardation plate is higher than a glass-transition temperature, Tgno, in a fast axis direction of the retardation plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.