Prism unit and a projection image display apparatus
US8233227B2 · kind B2 · utility
0Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 2008 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Sep 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/181
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A prism unit includes a prism having at least one optical surface in its inside, and a prism base disposing the prism, the prism base including at least three seating surfaces that are attached to a surface orthogonal to the optical surface of the prism, a seating surface bonded part that is bonded to the prism by an adhesive. At least the three seating surfaces and the seating surface bonded part are symmetrically arranged on the optical surface of the prism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.