Multi-Layer Optical Apparatus for Direction-Selective Filtering
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Solution Overview
Problem
Current technologies face challenges in effectively mapping optical radiation between specific angles of incidence and coordinate locations, particularly in achieving high efficiency and flexibility in optical filtering and transformation applications.
Innovation Solution
The development of a multi-layer optical apparatus comprising Fourier-transforming and inverse Fourier-transforming optically transmissive elements, along with an optically modulating matrix layer, which selectively maps and modifies optical radiation based on angle of incidence, utilizing metamaterials and gradient refractive index lenses to achieve direction-selective filtering and transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical filtering methods are used, then simple structure is maintained, but direction-selective filtering capability and mapping precision are insufficient
Solution Approach 1:
The optical apparatus is divided into multiple functional layers: a first optically transmissive layer with Fourier-transforming elements for angular mapping, a modulation matrix layer for direction-selective filtering, and a second optically transmissive layer with inverse Fourier-transforming elements for spatial mapping. This segmentation allows each layer to perform a specific function, achieving high mapping precision while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The patent transforms optical radiation from the angular domain to the spatial domain through Fourier transformation in the first layer, applies modulation in the intermediate layer, and then transforms back to the angular domain through inverse Fourier transformation in the second layer. This dimensional transformation enables direction-selective filtering while maintaining high mapping precision across multiple dimensions.
2Adaptability or versatility
If multi-layer optical apparatus is implemented, then direction-selective filtering capability is enhanced, but device complexity increases
Solution Approach 1:
The modulation matrix layer serves multiple functions simultaneously: it performs direction-selective filtering, spatial modulation, and angular filtering based on the incident angle of optical radiation. This multi-functionality enhances adaptability and versatility while avoiding the need for separate dedicated components for each function, thereby limiting the increase in overall apparatus complexity.
Solution Approach 2:
The modulation matrix layer acts as an intermediary between the first and second optically transmissive layers, enabling direction-selective filtering without requiring complex integrated structures. This intermediate layer simplifies the overall design by allowing independent optimization of each layer's parameters and facilitating easier manufacturing and assembly.
3Loss of energy
If high transmittance is achieved, then optical efficiency is improved, but filtering precision and direction-selectivity may be compromised
Solution Approach 1:
The modulation matrix employs elements with different optical properties at different spatial locations and angles. Each element can be optimized for its specific function (transmission or filtering) while maintaining overall high transmittance. This local optimization allows the system to achieve both high optical efficiency and precise direction-selective filtering by tailoring the optical characteristics of individual elements to their specific requirements.
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
This solution enables efficient and flexible mapping of optical radiation, enhancing optical filtering and transformation capabilities, allowing for applications in autostereoscopic displays, augmented reality, and defensive structures while maintaining high transmittance and resolution.
Implementation Method 1
Each of the optically transmissive elements in the array is a Fourier-transforming optically transmissive element that maps optical radiation between angles of incidence and coordinate locations
Implementation Method 2
an optical apparatus to receive optical radiation at each of a plurality of angles of incidence and map the optical radiation to one of a plurality of locations on an opposing surface
Implementation Method 3
An array of inverse Fourier-transforming optically transmissive elements maps the optical radiation from each of the plurality of unique locations for propagation at angles corresponding to the received angles of incidence
Implementation Method 4
Each of the optically transmissive elements in the array is a Fourier-transforming optically transmissive element that maps optical radiation between angles of incidence and coordinate locations
Implementation Method 5
A modulation matrix, for example, may allow for the selective modulation (modification, overlay, dimming, amplifying, etc.) of the optical radiation passing therethrough in any of a wide variety of ways
Data Source
AI summary
A multi-layer optical device may include one, two, or three layers. A first layer may include an array of Fourier-transforming optically transmissive elements to map optical radiation between each of a plurality of angles of incidence and corresponding coordinate locations proximate each respective optically transmissive element. A second layer may provide a modulation matrix of optically modulating sub-elements optically coupled to the array of transmissive elements, where each optically modulating sub-element corresponds to one of the coordinate locations of the first layer mapping. A third layer includes an array of inverse Fourier-transforming optically transmissive elements to inverse-map optical radiation from the optically modulating sub-elements of the modulation matrix for propagation at angles corresponding to the angles of incidence from which the optical radiation was received.