Metasurface reflector, projection device, and near-to-eye wearable device
The superstrate design with non-periodic metal unit arrangements and phase-changing structures addresses the issue of unwanted scattered light in existing superstrate technologies, improving reflection efficiency and reducing light leakage.
CN119689614APending Publication Date: 2025-03-25TDK CORP
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Patent Information
- Application Number
- CN202411321710.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-25
- Filing Date
- 2024-09-23
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
Existing superstrate technologies with periodic arrangements of triangular antennas produce unwanted scattered light due to their inherent periodicity, which affects the efficiency of reflection.
Method used
A superstrate design featuring a first and second metal layer stacked in a specific direction with an electric medium layer in between, where the second metal layer has a non-periodic arrangement of metal units with varying lengths along a direction to minimize scattering, and includes a phase-changing metal unit structure to control reflection angles.
Benefits of technology
This design reduces unwanted scattered light by breaking periodicity and optimizing reflection angles, enhancing the efficiency of light reflection and reducing light leakage.
✦ Generated by Eureka AI based on patent content.
Abstract
A metasurface reflector includes a first metal layer and a second metal layer stacked in a first direction, and a dielectric layer provided between the first metal layer and the second metal layer in the first direction, the dielectric layer having a main surface on which the second metal layer is provided. The metasurface reflector is divided into a plurality of unit regions arranged in a second direction along the main surface and in a third direction along the main surface and intersecting the second direction, and the second metal layer includes metal cells provided in all or some of the plurality of unit regions. The lengths in the second direction of the metal cells set for the same wavelength among the metal cells arranged in the second direction are different from each other.
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