Microstructured Optical Element for Broadband Transmittance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical elements with metasurfaces exhibit high wavelength dependency, limiting their ability to achieve desirable optical characteristics across a broad wavelength band.
Innovation Solution
An optical element with two-dimensionally arranged microstructures that generate phase differences in incident light beams, allowing transmitted light beams from adjacent microstructures to interfere, reducing wavelength dependency and enabling easy design changes in optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resonance is used in metasurface microstructures, then optical characteristics such as transmission, reflection, and absorption can be controlled, but the wavelength dependency becomes high and desirable optical characteristics are realized only in a narrow wavelength band
Solution Approach 1:
The optical element divides the control function into multiple discrete microstructures arranged in a array, where each microstructure independently controls the phase and amplitude of transmitted light. This segmentation allows the system to achieve broadband optical control by combining the effects of multiple microstructures with different geometric configurations, rather than relying on a single resonant structure that is limited to a narrow wavelength band.
Solution Approach 2:
The invention changes the geometric parameters (such as diameter, height, and spacing) of the microstructures to control the optical characteristics. By adjusting these parameters, the phase difference between transmitted light from adjacent microstructures can be controlled, enabling the system to achieve desirable optical characteristics across a broad wavelength band rather than being limited to a narrow resonant band.
2Reliability
If resonance is utilized in metasurface microstructures, then optical control is achieved, but the wavelength dependency is high making it difficult to realize desirable optical characteristics for wavelength components in a broad band
Solution Approach 1:
The invention creates a dynamic control mechanism where the phase difference between adjacent microstructures can be adjusted by changing their geometric parameters. This dynamic adjustability allows the system to adapt to different wavelength components and achieve desirable optical characteristics across a broad band, rather than being fixed by resonant conditions that are only valid for a narrow wavelength range.
3Reliability
If metasurface microstructures are used, then optical characteristics can be controlled, but design change becomes difficult and wavelength dependency is high
Solution Approach 1:
The optical element is segmented into multiple identical or different microstructures that can be independently designed and manufactured. This segmentation allows for flexible design changes by modifying individual microstructure geometries or their arrangement patterns, making the system easier to manufacture and adapt to different optical requirements compared to monolithic resonant structures.
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 optical element achieves low wavelength dependency and precise control over transmittance, allowing for broad-band attenuation of far infrared radiation and reduced absorption, enhancing reliability and versatility.
Implementation Method 1
each of which generates a phase difference in an incident light beam and emits the incident light beam as a transmitted light beam
Implementation Method 2
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
Data Source
AI summary
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.