Multi-Wavelength IR Imaging for Sharper, Lower-Noise Detection
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Solution Overview
Problem
Existing infrared (IR) and microwave imaging devices produce images that are either noisy or lack sharpness due to detecting only a single wavelength, and require cooling to low temperatures for improved performance.
Innovation Solution
A device comprising a wavelength selector, scanning unit, and detector arranged along a common optical path, which selects and directs at least two wavelengths of IR or microwave irradiation for separate detection and image generation, with an optional cooling unit to maintain temperatures below ambient, allowing for the creation of a sharper and less noisy image by overlaying these images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single wavelength is detected, then the device complexity is reduced, but the image quality (sharpness and noise reduction) deteriorates
Solution Approach 1:
The device segments the detection process by using multiple independent detector elements, each tuned to a specific wavelength. The wavelength selector separates incident irradiation into multiple wavelength components that are detected separately and then combined through overlay processing to generate high-quality images.
Solution Approach 2:
The invention adds the wavelength dimension to the detection process. Instead of detecting only spatial information, the system incorporates spectral information by detecting multiple wavelengths simultaneously, creating a multi-dimensional detection approach that improves image quality without proportionally increasing complexity.
2Reliability
If cooling is applied to reduce thermal noise, then the signal-to-noise ratio improves, but the energy consumption and device complexity increase
Solution Approach 1:
The invention extracts and removes the wavelength selection function from the detector itself, placing it in a separate wavelength selector component. This allows the detector to operate at higher temperatures while still achieving low noise performance through selective wavelength detection that excludes thermal noise wavelengths.
Solution Approach 2:
The system changes the operational temperature parameter from cryogenic to near-ambient or moderately cooled temperatures. By combining moderate cooling with multi-wavelength detection and overlay processing, the system achieves high signal-to-noise ratios without requiring extreme cooling that would consume excessive energy.
3Measurement precision
If multiple wavelengths are detected separately and overlaid, then the image sharpness and noise reduction improve, but the device complexity and processing requirements increase
Solution Approach 1:
The invention merges multiple separate wavelength detection channels into a unified image output through overlay processing. The wavelength selector, multiple detector elements, and image processing unit work together as an integrated system that combines spectral information to produce enhanced images with improved sharpness and reduced noise.
4Object-affected harmful factors
If cooling to low temperatures is implemented, then thermal noise is reduced, but the manufacturing complexity and operational requirements increase
Solution Approach 1:
The wavelength selector acts as an intermediary component that filters incident irradiation before it reaches the detector. By selecting specific wavelengths and blocking others (including thermal radiation wavelengths), it protects the detector from thermal noise without requiring the entire system to be cooled to cryogenic temperatures, thereby simplifying manufacturing and operation.
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 device generates sharper and less noisy images compared to single-wavelength detection systems, with reduced thermal noise and improved signal-to-noise ratio, enabling higher quality IR and microwave pictures without the need for extensive cooling.
Implementation Method 1
a wavelength selector (2) which is set up to select at least two wavelengths from the range of infrared (IR) and/or microwave irradiation from incident irradiation (1)
Implementation Method 2
a detector (4) which is set up to detect incident irradiation (1) of the first wavelength to generate corresponding first electrical signals (5)
Implementation Method 3
an optional cooling unit (7) which is set up to cool the scanning unit (3) and/or the detector (4) and/or the entire device to a temperature of up to 70 K below ambient temperature
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a detector, device and a method for imaging infrared (IR) and/or microwave irradiation. The detector and resp. the device is set up to detect at least two wavelengths of IR and/or microwave irradiation from incident irradiation and for each wavelength to generate a separate image. By overlaying the separate images, the device generates a picture which is sharper and/or has less noise than can be obtained by devices from prior art. The device can be used as a camera for generating infrared and/or microwave pictures.