AUGMENTED REALITY DEVICE AND METHOD OF ITS OPERATION Russian patent published in 2020 - IPC G02B27/01 G02B5/18 

FIELD: augmented reality device.

SUBSTANCE: invention relates to display methods and augmented reality devices based on diffraction and holographic optical elements and enables to increase the visible field of view, compactness and reproduction efficiency. Display method comprises steps of: A) radiation from the projection system falls on the first diffraction grating expanding; B) diffraction of each of beams falling on the first grid, forms negative first diffraction order, zero diffraction order and first diffraction order; C) the zero diffraction order comes out of the spreading first waveguide and falls on the second waveguide; D) minus the first diffraction order and the first diffraction order are propagated in the first waveguide by total internal reflection (TIR), returning to the first grid, falling on it in different points that do not coincide with each other; diffraction is again undergone, each forming a new minus first diffraction order, a new zero diffraction order, a new first diffraction order; E) for each new minus first diffraction order, a new zero diffraction order, a new first diffraction order, steps (C)–(D) are repeated; F) each zero diffraction order falling on the second waveguide passes through the second waveguide to the second diffraction grating, wherein diffraction of each of beams falling on the second grid, forms a minus first diffraction order, a zero diffraction order and a first diffraction order, wherein the first diffraction order experiences the airfoil from the wall of the second waveguide opposite the wall of the second waveguide facing the eye, re-enters the second grid, forms a new minus first diffraction order, a new zero diffraction order and a new first diffraction order, at that said new zero diffraction order leaves waveguide in direction to eye.

EFFECT: disclosed is augmented reality device and method of its operation.

28 cl, 12 dwg