Augmented reality device and optical system thereof
US11966056B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2019 |
| Grant date | Apr 23, 2024 |
| Priority date | — |
| Expiry date | Aug 9, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0194
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present application discloses an augmented reality apparatus and an optical system thereof. The optical system includes an image source; a bandpass polarizing beam splitter, relative to the image source, defining a beam splitting side adjacent to the image source and a transmission side facing away from the image source, the bandpass polarizing beam splitter being configured to allow polarization splitting of light incident thereon in a given wavelength range and allow transmission of light out of the given wavelength range; a wave plate adjacent to the beam splitting side; and a curved bandpass semi-reflector located downstream of the wave plate in a path of the reflected light and configured to allow reflection of light incident on the curved bandpass semi-reflector in the given wavelength range and allow transmission of light out of the given wavelength range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.