Coded Mask Wavelength Band Flexibility in Lensless Imaging
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Solution Overview
Problem
Conventional lensless imaging systems lack the flexibility to change the optical wavelength band, making it difficult to narrow or alter the detected wavelength band, which is a limitation in applications requiring multispectral imaging, such as medical endoscopic observations and agricultural inspections.
Innovation Solution
An imaging device comprising a coded mask with a two-dimensional grating pattern of band pass filters and a color filter array, which allows for flexible selection of wavelength bands by modulating light and reconstructing image data, enabling the detection of specific wavelength bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional lensless imaging system uses a fixed pattern mask or diffraction grating, then the imaging system achieves downsizing and weight reduction, but the optical wavelength band cannot be flexibly changed
Solution Approach 1:
The patent applies dynamics by making the coded mask可调 (adjustable) between different patterns. The coded mask can be switched between a first pattern for visible light and a second pattern for infrared light, enabling the imaging system to adapt to different wavelength bands. This dynamic reconfigurability resolves the contradiction by allowing wavelength band flexibility without requiring completely different imaging systems for each band.
Solution Approach 2:
The patent implements universality by designing a single coded mask that serves multiple functions across different wavelength bands. The same physical mask structure can be configured in different patterns to handle both visible and infrared imaging, making the imaging device multi-functional. This eliminates the need for separate dedicated masks for each wavelength band, thereby improving adaptability while controlling complexity.
2Measurement precision
If a lensless imaging system uses narrow band imaging, then imaging precision for specific applications is improved, but the device loses versatility across different wavelength bands
Solution Approach 1:
The patent uses dynamics by enabling the coded mask to switch between different patterns depending on the imaging requirements. When narrow band imaging precision is needed, the appropriate pattern is selected for that specific wavelength band. This dynamic switching capability allows the system to maintain high precision for specific applications while preserving the ability to adapt to different wavelength bands when needed.
3Measurement precision
If separate imaging systems are used for visible and infrared bands, then imaging precision for each band is optimized, but device complexity and cost increase
Solution Approach 1:
The patent applies merging by combining the functionality of separate visible and infrared imaging systems into a single unified device. The coded mask is designed with multiple patterns that can be switched between, allowing one imaging system to perform the functions that would otherwise require multiple separate systems. This reduces overall device complexity while maintaining optimized imaging precision for each wavelength band through pattern-specific design.
Solution Approach 2:
The patent implements universality by creating a single imaging device that can handle both visible and infrared wavelength bands. The coded mask serves as a universal component that, through pattern switching, enables the same imaging system to achieve optimized performance across different wavelength bands. This eliminates the need for multiple dedicated systems, thereby reducing complexity while preserving imaging 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
This solution allows for flexible and efficient change in the optical wavelength band, enabling downsizing, weight reduction, cost reduction, and enhanced imaging capabilities, including narrow band imaging, while maintaining high manufacturing cost-effectiveness.
Implementation Method 1
a coded mask including two or more kinds of band bus filters that are arranged in a two-dimensional grating pattern and that transmit light of different wavelength bands
Implementation Method 2
a light receiving unit that receives modulated light modulated by the coded mask and generates observation signal data
Data Source
AI summary
An optical wavelength band to be detected is flexibly changed. An imaging device includes a coded mask including two or more kinds of band bus filters that are arranged in a two-dimensional grating pattern and that transmit light of different wavelength bands, a light receiving unit that receives modulated light modulated by the coded mask and generates observation signal data, and an image reconstruction processing unit that reconstructs the observation signal data generated by the light receiving unit to generate image data.