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US 12,181,702 B2Granted
Distributed light projection device
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsChristophe Martinez, Daivid Fowler, Basile Meynard
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Abstract
A Distributed light projection device, including: one or a plurality of waveguides; and above each waveguide, a plurality of extraction cells coupled to distinct portions of the guide, each extraction cell including first and second stacked diffraction gratings.
Claims17
A distributed light projection device, comprising:
- a plurality of waveguides;
- and
- above each waveguide of the plurality of waveguides, a plurality of extraction cells coupled to distinct portions of each waveguide, each extraction cell in the plurality of extraction cells comprising stacked first and second diffraction gratings,
- wherein the first and second diffraction gratings within each extraction cell in the plurality of extraction cells are offset by a position offset value and different extraction cells in the plurality of extraction cells have different position offset values between the first and second diffraction gratings, whereby the different extraction cells have different extraction coefficients;
- wherein each waveguide of the plurality of waveguides is a monomode waveguide;
- wherein, in each extraction cell, the first and second diffraction gratings have a same pitch;
- wherein the second diffraction grating extends above at least one portion of the first diffraction grating and covers the at least one portion of the first diffraction grating;
- wherein the extraction coefficient comprises a percentage of guided light extracted by each extraction cell;
- and
- wherein each extraction cell is formed apart in a horizontal plane.
7 more elements
A distributed light projection device, comprising:
- one waveguide;
- and
- above the waveguide, a plurality of extraction cells coupled to distinct portions of the waveguide, each extraction cell in the plurality of extraction cells comprising stacked first and second diffraction gratings,
- wherein the first and second diffraction gratings within each extraction cell in the plurality of extraction cells are offset by a position offset value and different extraction cells in the plurality of extraction cells have different position offset values between the first and second diffraction gratings, whereby the different extraction cells have different extraction coefficients;
- wherein the waveguide is a monomode waveguide;
- wherein, in each extraction cell, the first and second diffraction gratings have a same pitch;
- wherein the second diffraction grating extends above at least one portion of the first diffraction grating and covers the at least one portion of the first diffraction grating;
- wherein the extraction coefficient comprises a percentage of guided light extracted by each extraction cell;
- and
- wherein each extraction cell is formed apart in a horizontal plane.
7 more elements
Dependencies are inferred from the claim text.