Image combiner and image display device
US8035872B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 2005 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Mar 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention aims to provide an image combiner and an image display device which can easily have a wide field of view and reduce a thickness of a substrate while reducing loss of light intensity by means of a PBS. An image combiner includes a substrate transparent to visible light; and a polarization beam splitter installed in the substrate to reflect a light flux introduced into the substrate from an image-display element and to make the light flux incident on an exit pupil outside the substrate. An exit angle θ0 at which a principal ray of the light flux emitted from a center of a display surface of the image-display element is emitted from a surface of the substrate toward a center of the exit pupil satisfies a condition of 3°≦θ0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.