Wave plate with birefringent regions and its manufacturing method
US8059337B2 · kind B2 · utility
2Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2009 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Oct 7, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1353
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wave plate is disclosed which includes a glass plate having a thickness of at least 0.1 mm and at most 5 mm. The glass plate has a plurality of strip-shaped birefringent regions substantially in parallel with a surface of the glass plate. The axial directions of the strip-shaped birefringent regions are the same with one another, and substantially in parallel with the surface of the glass plate. The wave plate has a retardation value of from 80 to 450 nm as measured with incident light having a wavelength of 540 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.