Hyperspectral Element Series Sub-Filters for Compact High-Resolution Imaging
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Solution Overview
Problem
Current hyperspectral imaging technologies face challenges in achieving high resolution and miniaturization, with scanning methods providing high resolution but being bulky and time-consuming, while non-scanning snapshot methods offer miniaturization but compromise on spectral image resolution.
Innovation Solution
A hyperspectral element comprising a multi-filter and multi-detector system with sub-filters and sub-detectors arranged in series, including refractive index films, reflective layers, and nanostructures, which generate channel signals for a spectroscopic processor to provide information on wavelength light intensities, and a micro lens for light collection, enabling high-resolution and broadband characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a scanning method is used for hyperspectral imaging, then high spectral resolution is achieved, but the device becomes bulky and measurement time increases
Solution Approach 1:
The imaging device is segmented into multiple pixel units, each equipped with sub-filters for different wavelength bands. This segmentation allows parallel spectral measurement across multiple pixels without requiring mechanical scanning, thereby achieving high spectral resolution while maintaining a compact form factor.
Solution Approach 2:
The patent transitions from a single-pixel scanning approach to a multi-pixel parallel architecture. By adding the spatial dimension of multiple pixels, each with dedicated spectral filtering capabilities, the system achieves spectral resolution without mechanical movement, eliminating the bulk associated with scanning mechanisms.
2Device complexity
If a non-scanning snapshot method is used for hyperspectral imaging, then miniaturization is achieved, but spectral image resolution deteriorates
Solution Approach 1:
Each pixel is segmented into multiple sub-pixels or detection regions, each responsible for detecting specific wavelength bands. This segmentation enables spectral discrimination at the pixel level without requiring complex optical path sharing, thereby maintaining high spectral resolution in a miniaturized snapshot configuration.
Solution Approach 2:
The multi-filter structure integrates multiple spectral filtering functions within a single compact pixel unit. Each pixel can simultaneously or sequentially detect multiple wavelength bands through the stacked sub-filters, providing universal spectral detection capability without increasing overall device size.
3Measurement precision
If multiple optical devices are integrated in an image sensor, then spectral detection capability is improved, but the sensor becomes bulky and heavy
Solution Approach 1:
Multiple filtering layers and detection elements are nested vertically within each pixel column. The sub-filters are stacked in series, with each layer detecting specific wavelength bands. This nested arrangement consolidates multiple optical functions into a compact vertical structure, significantly reducing the sensor's footprint and weight while maintaining comprehensive spectral detection capability.
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 solution enables high-resolution hyperspectral imaging with broadband capabilities, improving upon existing technologies by providing a compact and efficient system that maintains high spectral resolution and miniaturization.
Implementation Method 1
Each of the first sub filter and the second sub filter may include first refractive index films and second refractive index films that are alternately stacked, and the first refractive index layers may have different refractive indexes than the second refractive index layers
Implementation Method 2
Each of the first sub filter and the second sub filter may include: a first reflective layer; a second reflective layer
Implementation Method 3
A hyperspectral element comprising a multi-filter and multi-detector system with sub-filters and sub-detectors arranged in series, including refractive index films, reflective layers, and nanostructures, which generate channel signals for a spectroscopic processor to provide information on wavelength light intensities, and a micro lens for light collection
Implementation Method 4
the nanostructure layer may include a plurality of nano rods, and the plurality of nano rods may be asymmetrically arranged
Implementation Method 5
the nanostructure layer may include a plurality of nano holes, and the plurality of nano holes may be asymmetrically arranged
Implementation Method 6
a multi detector including a first sub detector that detects light having a first wavelength band and generates a first channel signal, and a second sub detector that detects light having a second wavelength band and generates a second channel signal
Data Source
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AI summary
A hyperspectral element includes (1) a multi filter including: a first sub filter through which first wavelength light having a first wavelength passes; and a second sub filter through which second wavelength light having a second wavelength passes, the second wavelength being different from the first wavelength; and (2) a multi detector configured to detect the first wavelength light and the second wavelength light, wherein the first sub filter and the second sub filter may be arranged in series in an optical path of incident light which is incident onto the multi filter.