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US 2026/0267150 A1Published application
Multi-layer coating structure to minimize phase shifts
AssigneeLumus Ltd.
InventorsRonen CHRIKI, Elad SHARLIN
Life of this patent
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Abstract
An apparatus includes a waveguide and one or more partially reflective surfaces embedded inside the waveguide, wherein each of the one or more partially reflective surfaces includes a multi-layer coating structure, wherein a first portion of the multi-layer coating structure induces an overall phase shift of light propagating through the first portion of the multi-layer coating structure and wherein a second portion of the multi-layer coating structure is selected to decrease the overall phase shift.
Claims20
A waveguide comprising:
- an ambient material;
- and
- a plurality of partially reflective parallel surfaces embedded inside the ambient material at an angle relative to side-wall surfaces of the ambient material, each of the plurality of partially reflective parallel surfaces comprising:
- a first portion comprising one or more first layers configured for one or more optical characteristics that do not include low phase shift, the one or more first layers configured to cause a first portion of light from a surrounding of the waveguide that traverses through the one or more first layers to have a phase shift relative to a second portion of the light from the surrounding of the waveguide that does not traverse through the one or more first layers;
- and
- a second portion comprising one or more second layers configured to reduce the phase shift induced by the first portion on the light from the surrounding of the waveguide that impinges the one or more first layers.
3 more elements
A waveguide comprising:
- an ambient material;
- and
- a plurality of partially reflective parallel surfaces embedded inside the ambient material at an angle relative to side-wall surfaces of the ambient material, each of the plurality of partially reflective parallel surfaces comprising:
- a multi-layer coating structure comprising:
- one or more layers configured to limit an overall phase shift of light from a surrounding of the waveguide that traverses through the multi-layer coating structure, relative to light from the surrounding of the waveguide that does not traverse through the multi-layer coating structure, to below a predetermined threshold.
2 more elements
Dependencies are inferred from the claim text.