Polarization conversion element, polarization-conversion-element manufacturing method, light-source unit, and optical device
US10042176B2 · kind B2 · utility
0Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2014 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Feb 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/286
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention provides a polarization conversion element that is highly resistant to the heat and light that result from increased brightness levels. In said polarization conversion element, inorganic half-wave plates provided selectively on the output surface of a polarizing beam-splitter array have obliquely deposited layers comprising a dielectric material and the side surfaces of said obliquely deposited layers are covered by protective films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.