Wide-band wave plate and a controlling method thereof
US7319558B2 · kind B2 · utility
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Key dates
| Filing date | Feb 23, 2006 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Feb 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1809
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wide-band wave plate having at least two wave plates, each of which has a microstructure to generate a phase difference, the microstructure having a cycle not shorter than 1/nmin of a shortest wavelength of light in use, wherein the two wave plates are arranged to face opposite with their main axes in non-parallel with each other, wherein nmin is a refractive index of a wave plate material with respect to the shortest wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.