Patent ID: 11960106
Assignee: ACER INCORPORATED
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An augmented reality (AR) device comprising:
a laser source providing a coherent laser ray with a single wavelength;
a spatial light modulator providing a diffraction pattern, wherein when the spatial light modulator receives the coherent laser ray, the diffraction pattern diffracts the coherent laser ray as a hologram in response to the coherent laser ray; and
a hologram optical element comprises a surface providing a concave mirror effect merely in response to the single wavelength of the coherent laser ray, wherein the surface of the hologram optical element is provided with a grating that solely corresponds to the single wavelength of the coherent laser ray, and the hologram optical element receives the hologram and magnifies the hologram to provide a stereoscopic virtual image, wherein upon the coherent laser ray with the single wavelength incident on the surface or the grating, the grating only reflects the coherent laser ray with the single wavelength and does not reflect lights with other wavelengths.