Controlling grating outcoupling strength for AR waveguide combiners
First Claim
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1. A device comprising:
- one or more regions, each of the regions having one or more gratings formed on a substrate, the gratings of at least one region of the one or more regions comprising;
at least one first grating formed on the substrate having a first duty cycle;
at least one second grating formed on the substrate adjacent to the at least one first grating having a second duty cycle different than the first duty cycle; and
at least one third grating formed on the substrate adjacent to the at least one second grating having a third duty cycle different than the first duty cycle and the second duty cycle.
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Abstract
Embodiments described herein relate to augmented waveguide regions. The augmented waveguide regions generally include pluralities of gratings having duty cycles and refractive indices. In certain embodiments, the duty cycles are different, the refractive indices are different, or both the duty cycles and the refractive indices are different. Also described herein are methods for forming the augmented waveguide regions.
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Citations
20 Claims
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1. A device comprising:
one or more regions, each of the regions having one or more gratings formed on a substrate, the gratings of at least one region of the one or more regions comprising; at least one first grating formed on the substrate having a first duty cycle; at least one second grating formed on the substrate adjacent to the at least one first grating having a second duty cycle different than the first duty cycle; and at least one third grating formed on the substrate adjacent to the at least one second grating having a third duty cycle different than the first duty cycle and the second duty cycle. - View Dependent Claims (2, 3, 4, 5)
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6. A device comprising:
one or more regions, each of the regions having one or more gratings formed on a substrate, the gratings of at least one region of the one or more regions comprising; at least one first grating formed on the substrate having a first refractive index; at least one second grating formed on the substrate adjacent to the at least one first grating having a second refractive index greater than the first refractive index; and at least one third of grating formed on the substrate adjacent to the at least one second grating having a third refractive index greater than the second refractive index. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method comprising:
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depositing a first plurality of droplets onto a substrate, each droplet of the first plurality of droplets spaced from each other on the substrate and including one or more first materials; depositing a second plurality of droplets onto the substrate, each droplet of the second plurality of droplets spaced from each other on the substrate and including one or more second materials; imprinting a stamp into the first plurality of droplets and the second plurality of droplets; curing the one or more first materials and the one or more second materials; and releasing the stamp to form a first grating of the one or more first materials and a second grating of the one or more second materials, the first grating has a first refractive index and a first duty cycle, the second grating has a second refractive index and a second duty cycle, and either; the first duty cycle is different from the second duty cycle;
orthe first refractive index is different from the second refractive index;
orboth the first refractive index and the first duty cycle are different from the second refractive index and the second duty cycle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification