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US 2026/0023201 A1Published application
Optical element
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsKEIGO MASUDA, EIJI TAKEDA
Life of this patent
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Abstract
An optical element includes a plurality of microstructures that are two-dimensionally arranged and each of which generates a phase difference in an incident light beam and emits the incident light beam as a transmitted light beam. Phases of transmitted light beams from two adjacent microstructures among the plurality of microstructures differ from each other. The optical element has a transmittance that is determined as transmitted light beams each from a corresponding one of the plurality of microstructures interfere with each other.
Claims16
An optical element comprising:
- a substrate;
- and
- a plurality of microstructures each of which is a protrusion on a main surface of the substrate, generates a phase difference in an incident light beam, and emits the incident light beam as a transmitted light beam,
- wherein the plurality of microstructures is two-dimensionally arranged on the main surface in a first direction in which the plurality of microstructures is most closely adjacent to each other and in a second direction that intersects the first direction and in which the plurality of microstructures is most closely adjacent to each other,
- wherein the plurality of microstructures includes
- a first microstructure that generates a first phase difference in the incident light beam and emits the incident light beam as a first transmitted light beam, and
- a second microstructure that differs from the first microstructure in shape and/or size, generates a second phase difference different from the first phase difference in the incident light beam, and emits the incident light beam as a second transmitted light beam,
- wherein a plurality of first microstructures is two-dimensionally arranged at a predetermined arrangement period in each of the first direction and the second direction, a plurality of second microstructures is two-dimensionally arranged at the predetermined arrangement period in each of the first direction and the second direction, each of the plurality of first microstructures is the first microstructure, and each of the plurality of second microstructures is the second microstructure, and
- wherein the second microstructure is disposed between two of the first microstructures in the first direction and the second direction and has a space between the second microstructure and the first microstructure adjacent thereto, and a center-to-center distance between the second microstructure and the first microstructure adjacent thereto is shorter than a wavelength of the incident light beam.
6 more elements
An optical element comprising:
- a substrate;
- and
- a plurality of microstructures each of which is a recess on a main surface of the substrate, generates a phase difference in an incident light beam, and emits the incident light beam as a transmitted light beam,
- wherein the plurality of microstructures is two-dimensionally arranged on the main surface in a first direction in which the plurality of microstructures are most closely adjacent to each other and in a second direction that intersects the first direction and in which the plurality of microstructures is most closely adjacent to each other,
- wherein the plurality of microstructures includes
- a first microstructure that generates a first phase difference in the incident light beam and emits the incident light beam as a first transmitted light beam, and
- a second microstructure that differs from the first microstructure in shape and/or size, generates a second phase difference different from the first phase difference in the incident light beam, and emits the incident light beam as a second transmitted light beam,
- wherein a plurality of first microstructures is two-dimensionally arranged at a predetermined arrangement period in each of the first direction and the second direction, a plurality of second microstructures is two-dimensionally arranged at the predetermined arrangement period in each of the first direction and the second direction, each of the plurality of first microstructures is the first microstructure, and each of the plurality of second microstructures is the second microstructure, and
- wherein the second microstructure is disposed between two of the first microstructures in the first direction and the second direction and is connected to the first microstructure adjacent thereto, and a center-to-center distance between the second microstructure and the first microstructure adjacent thereto is shorter than a wavelength of the incident light beam.
6 more elements
Dependencies are inferred from the claim text.