Fixed-Pixel Spectrometer for Broad-Range Automatic Classification
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Solution Overview
Problem
Existing miniaturized spectrometers are expensive, complex, and require human interaction for data interpretation, limiting their use in consumer applications due to mechanical movements causing measurement distortions and limited wavelength ranges, and lack integrated data analysis capabilities.
Innovation Solution
A miniaturized spectral measurement device with integrated data analysis, comprising multiple photodetectors with active and darkened pixels, a radiation source, and an evaluation device for automatic calibration, capable of classifying optical radiation across a broad wavelength range and providing consumer-friendly operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If miniaturized spectrometers are used, then device size is reduced, but measurement precision deteriorates due to mechanical movements causing distortions
Solution Approach 1:
The patent replaces mechanical moving parts with a fixed detector array that simultaneously captures multiple wavelengths. Instead of using moving mirrors or gratings to scan wavelengths, the invention uses a stationary detector with multiple pixels, each sensitive to different wavelength ranges, thereby eliminating mechanical movements that cause vibrations and measurement distortions.
2Device complexity
If discrete wavelength filters are used, then device complexity is reduced, but adaptability deteriorates due to limited wavelength range
Solution Approach 1:
The patent employs a detector array where each pixel can be configured to detect different wavelength ranges. This allows a single device to perform multiple spectral measurement functions across broad wavelength ranges (UV, visible, infrared) without requiring separate specialized devices, achieving versatility while maintaining relatively simple device structure.
3Loss of information
If qualitative analysis capabilities are added, then information content is increased, but ease of operation deteriorates due to requirement for trained user interaction
Solution Approach 1:
The patent integrates a processing unit that automatically analyzes spectral data and provides qualitative information about measured objects without requiring user expertise. The system performs self-service by automatically interpreting spectral patterns, identifying materials, and presenting results in user-friendly formats, thereby maintaining high information content while improving ease of operation for consumer applications.
4Productivity
If miniaturized spectrometers are used, then productivity is increased for industrial applications, but cost deteriorates making them unsuitable for consumer use
Solution Approach 1:
The patent uses inexpensive photodetector pixels that can be manufactured in large arrays using standard semiconductor fabrication processes. Rather than using expensive specialized detectors, the invention employs cost-effective detector technology that enables mass production, thereby reducing per-unit costs and making miniaturized spectrometers suitable for consumer applications while maintaining productivity benefits.
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
Enables reliable, low-cost, and user-friendly spectroscopic measurements with integrated data analysis, suitable for consumer applications such as smartphones and smart household devices, by minimizing mechanical distortions and requiring no human interaction for calibration.
Implementation Method 1
each pixel is configured for generating at least one photodetector signal dependent on an illumination of the pixel
Data Source
AI summary
Disclosed herein is a spectral measurement device for measuring optical radiation provided by at least one measurement object in at least one classification based spectral measurement. The spectral measurement device includes:at least one radiation source configured for emitting optical radiation at least partially towards the measurement object;at least two photodetectors, wherein each photodetector includes at least one pixel;at least one read-out device configured for measuring the photodetector signals and generating at least one item of spectral data; andat least one evaluation device comprising at least one processor and at least one memory storage.The evaluation device is configured for generating at least one item of measurement information by applying the classification model and the transfer function to the item of spectral data.


