Diffraction waveguide structure
The invention provides a diffractive waveguide structure. The diffractive waveguide structure includes: a waveguide sheet; the coupling-in area is arranged on the waveguide sheet, and the coupling-in area is used for coupling light emitted by an external optical machine into the waveguide sheet; a t...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention provides a diffractive waveguide structure. The diffractive waveguide structure includes: a waveguide sheet; the coupling-in area is arranged on the waveguide sheet, and the coupling-in area is used for coupling light emitted by an external optical machine into the waveguide sheet; a turning area; the coupling-out area, the turning area and the coupling-out area are respectively arranged on two different surfaces of the waveguide sheet, the turning area and the coupling-out area are oppositely arranged, the turning area is used for receiving light of the coupling-in area and carrying out pupil expansion and steering transmission, and the coupling-out area is used for receiving light of the turning area and carrying out coupling-out; wherein the turning area comprises a plurality of one-dimensional grating areas and a two-dimensional grating area, at least two sides of the two-dimensional grating area are connected with the one-dimensional grating areas, and symmetry axes of the coupling-in area |
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