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

Claim 16:
17. An augmented reality apparatus, comprising:
a holder; and
an optical system integrated in the holder and 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, the bandpass polarizing beam splitter comprising a beam splitter substrate and a bandpass polarizing beam splitting film attached on the beam splitter substrate, each film structure comprising a first material layer of a first refractive index and a second material layer of a second refractive index, the first refractive index being lower than the second refractive index, and the first material layer being adjacent to the image source, and the second material layer being away from the image source;
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, the curved bandpass semi-reflector comprising a semi-reflector substrate and a bandpass semi-reflective film attached on the semi-reflector substrate, the film structure comprising a third material layer of a third refractive index and a fourth material layer of a fourth refractive index, the third refractive index being lower than the fourth refractive index, the third material layer being adjacent to the bandpass polarizing beam splitter or the wave plate, and the fourth material layer being away from the bandpass polarizing beam splitter or the wave plate.