Prism assembly
US7576932B2 · kind B2 · utility
8Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2005 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Aug 25, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A prism assembly including two or more prisms, at least one of which has or more surfaces that are used for total internal reflection or partial spectral reflection of incoming light, wherein at least a part of one of the surfaces used for reflection purposes is covered with an element that is spaced apart from the surface, such that a gap is defined in between the surface and the element, and wherein the gap is sealed with a seal that is applied on one of said prisms in order to prevent contaminants from entering the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.