Multiplexed Metasurface Flat Optics for Wide-FOV Depth Imaging
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Solution Overview
Problem
Conventional optical systems face limitations in achieving high-resolution, ultra-wide field-of-view imaging and depth perception due to their reliance on complex setups and limited depth discrimination capabilities, which are difficult to integrate with compact imaging systems.
Innovation Solution
A multifunctional meta-optic architecture incorporating a multiplexed metasurface on a substrate, capable of operating in multiple modes to encode different optical responses based on light properties, such as polarization and wavelength, enabling simultaneous wide-FOV and depth-sensitive imaging with enhanced depth discrimination using a double-helix PSF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems use complex setups to achieve high-resolution imaging, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple optical functions (imaging, depth discrimination, wide field-of-view) into a single meta-optic device with a multiplexed metasurface. This merging eliminates the need for complex multi-component optical systems while maintaining high imaging quality through the integrated metasurface structure that manipulates light at the wavelength scale.
Solution Approach 2:
The meta-optic device performs multiple functions simultaneously: high-resolution imaging, depth discrimination via double-helix point spread function, and wide field-of-view capture. The multiplexed metasurface design enables a single device to replace multiple specialized optical components, reducing overall system complexity.
2Measurement precision
If conventional optical systems use multiple components for depth perception, then depth discrimination capability is improved, but device complexity increases
Solution Approach 1:
The patent integrates depth discrimination functionality directly into the imaging metasurface by encoding a double-helix point spread function. This merging of depth measurement and imaging functions into a single component eliminates the need for separate depth-sensing optical elements, reducing system complexity while maintaining precise depth discrimination.
Solution Approach 2:
The metasurface manipulates the phase parameters of incident light to generate a double-helix point spread function, where the rotational angle of the intensity pattern encodes depth information. By changing the phase parameter distribution across the metasurface, the system achieves accurate depth discrimination without additional optical components.
3Area of stationary object
If conventional optical systems use traditional lens designs for wide field-of-view imaging, then field-of-view is improved, but device complexity and size increase
Solution Approach 1:
The meta-optic device simultaneously achieves wide field-of-view imaging and high-resolution focal plane imaging through its multiplexed metasurface design. The metasurface structures are configured to manipulate light across a broad angular range while maintaining focus quality, eliminating the need for complex multi-element wide-angle lens systems.
Solution Approach 2:
The patent replaces traditional mechanical lens systems with a planar metasurface that uses sub-wavelength structures to control light propagation. This substitution of mechanical optical components with a flat, fabricatable metasurface reduces system complexity and enables compact integration while maintaining wide field-of-view performance.
4Volume of moving object
If conventional optical systems use compact designs, then device size is reduced, but depth discrimination capability deteriorates
Solution Approach 1:
The metasurface employs phase parameter modulation to generate a double-helix point spread function that encodes depth information in the intensity distribution pattern. By controlling the phase parameters at the sub-wavelength scale, the system achieves accurate depth discrimination within a compact device footprint, eliminating the need for large optical paths.
Solution Approach 2:
The patent transitions from traditional 3D optical path designs to a 2D planar metasurface architecture. The depth discrimination information is encoded in the angular dimension of the point spread function rather than requiring extended optical paths, enabling compact device size while maintaining depth measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The meta-optic system achieves ultra-compact, high-resolution, and wide-FOV imaging with improved depth accuracy and efficiency, allowing for high-quality 3-D scene reconstruction and optical computing functionalities, while maintaining a lightweight and low-cost fabrication process.
Implementation Method 1
the multiplexed metasurface is designed to provide different optical responses to light with different polarization states (e.g., a first optical response for x-polarized light and a second optical response for y-polarized light)
Implementation Method 2
A multifunctional meta-optic architecture incorporating a multiplexed metasurface on a substrate, capable of operating in multiple modes to encode different optical responses
Implementation Method 3
enabling simultaneous wide-FOV and depth-sensitive imaging with enhanced depth discrimination using a double-helix PSF
Data Source
AI summary
Meta-optic systems are described that include multi-function metasurfaces formed from a plurality of meta-atoms. A multi-function metasurface can exhibit two or more different optical functions for two or more different states of light incident on the metasurface. Different states of light include different polarizations, different wavelengths, and different angles of incidence. Different optical functions include distance sensing, converging, diverging, image formation, and patterned light formation. The multi-function metasurface can selectively impart different phase profiles to an incident beam depending on the incident beam's state of light.