Patent ID: 11966056
Assignee: MATRIXED REALITY TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical system for an augmented reality apparatus, comprising:
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 perform polarization splitting on 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 the beam splitter being configured to allow light emitted from the image source to be non-perpendicularly incident on the beam splitting side and be at least partially reflected towards the wave plate; and
a curved bandpass semi-reflector located downstream of the wave plate in a path of 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,
wherein the bandpass polarizing beam splitter comprises a planar optical beam splitter substrate and a bandpass polarizing beam splitting film attached on the planar optical beam splitter substrate, wherein the bandpass polarizing beam splitting film comprises a single-layer structure made of two material films of different refractive indices or a multi-layer structure made of single-layer structures repeatedly overlaid with each other.