Augmented reality apparatus and optical system therefor
US11460704B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2021 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | May 20, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0185
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided are an optical system for an augmented reality apparatus and an augmented reality apparatus. The optical system includes an image source; a polarizing beam splitter including a polarizing beam splitting film and a polarizing film; a polarizer disposed between the image source and the beam splitting side of the polarizing beam splitter; a wave plate adjacent to the beam splitting side; a semi-reflector located downstream of the wave plate in an optical path of the reflected light; and an additional wave plate and an additional polarizer which are sequentially located distal to the semi-reflector. The image source has a planar image source for emitting light, wherein a plane where the beam splitting side of the beam splitter component locates is at a first angle (β) relative to a normal of the image source, the first angle has a value between 11° and 79°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.