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Distortion correction in metasurface dot projection based on coordinate mapping
Applied Optics
|August 13, 2026
Summary
This study introduces a metasurface projector using coordinate pre-compensation to fix geometric distortion in wide-angle 3D imaging. The novel method effectively corrects dot array distortion for clearer projections.
Area of Science:
- Optics and Photonics
- Metasurface Technology
- 3D Imaging
Background:
- Wide-angle structured light projection is crucial for advanced 3D imaging.
- Geometric distortion occurs due to the mismatch between spherical wave propagation and planar projection.
Purpose of the Study:
- To design a metasurface-driven dot array projector that corrects geometric distortion.
- To implement a coordinate pre-compensation strategy based on Rayleigh-Sommerfeld diffraction theory.
Main Methods:
- Designing a metasurface projector with a 225-dot array.
- Applying a coordinate pre-compensation strategy derived from diffraction theory.
- Analyzing dot distribution and geometric distortion over a wide field of view.
Main Results:
- Achieved an average eccentricity of 0.1931 over a 170° field of view.
- Observed denser dot distribution in the peripheral regions.
- Attained a diffraction efficiency of 48.93%.
Conclusions:
- The coordinate pre-compensation strategy effectively corrects dot array distortion.
- Metasurface-driven projectors offer a viable solution for wide-angle 3D imaging challenges.
- The proposed method enhances projection accuracy in peripheral areas.
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