Spectrometer Module Wavelength Detection Accuracy
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Solution Overview
Problem
Current spectral sensing technologies face challenges in accurately acquiring and processing spectral information, particularly in multi-spectral and hyperspectral applications, due to limitations in wavelength detection and spatial resolution, which can be affected by angular relationships and spatial inhomogeneities of the object being analyzed.
Innovation Solution
The development of a spectrometer module with a plurality of light detectors arranged in a pattern to detect unique selected wavelengths, integrated with an optical module and electronic circuitry, allowing for precise control of wavelength selection and rejection, and equipped with a rejection filter to minimize interference, enabling reliable spectral data recording even at non-optimal angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If spectral sensing is performed at non-optimal angles, then spatial coverage is improved, but measurement precision deteriorates due to angular relationships affecting wavelength detection
Solution Approach 1:
The patent applies local quality by assigning different functions to different parts of the sensor array. Specifically, certain pixels are designated as reference pixels that detect only a first wavelength, while other pixels detect multiple wavelengths including the first wavelength. This local differentiation allows the system to compensate for angular variations in wavelength detection, thereby maintaining measurement precision across various viewing angles while expanding spatial coverage.
2Productivity
If multiple wavelength bands are detected simultaneously, then productivity is improved, but device complexity increases due to additional optical components and processing requirements
Solution Approach 1:
The patent implements universality by designing a sensor array where certain pixels serve multiple functions. The same pixels that detect multiple wavelengths for spectral analysis also function as reference pixels for calibration purposes. This multi-functionality allows simultaneous detection of multiple wavelength bands without requiring separate dedicated reference sensors, thereby increasing productivity while limiting the growth of device complexity.
Solution Approach 2:
The patent merges the spectral detection function and the reference wavelength detection function into a unified sensor array structure. By integrating both functions within the same optical path and sensor substrate, the system achieves efficient simultaneous multi-wavelength detection without duplicating optical components, thus improving productivity while controlling device complexity.
3Measurement precision
If spatially resolved spectral information is acquired, then measurement precision is improved, but device complexity increases due to additional spatial encoding components
Solution Approach 1:
The patent employs copying by creating multiple identical sensor arrays that are spatially separated. Each sensor array contains the same pattern of multi-wavelength and reference pixels. This replication allows the system to capture spatially resolved spectral information by comparing signals from corresponding pixels across multiple arrays, achieving high measurement precision without requiring complex spatial encoding optics within each individual sensor unit.
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 configuration enhances the accuracy and reliability of spectral data acquisition by ensuring consistent wavelength detection across different angles and spatial portions of the object, improving the analysis of spectral information in various applications, including multi-spectral and hyperspectral sensing.
Implementation Method 1
A sensor is provided which is arranged to detect an intensity of light of different wavelengths
Implementation Method 2
The spectrometer comprises an optical module for directing light from an object towards the sensor
Data Source
AI summary
A user device includes a spectrometer module adapted to acquire spectral information and output spectral data representing the acquired spectral information, memory adapted to store predetermined calibration data, a processing unit configured to substantially correct the spectral data using the stored calibration data and an electronic circuit module, The electronic circuit module includes a light sensitive area for detecting incident light of a plurality of wavelengths within a set wavelength interval, detected light of a plurality of wavelengths forming spectral data and the light sensitive area including a plurality of light detectors. Each light detector is adapted to detect light of a selected wavelength. The calibration data is based on a predetermined characteristic of the electronic circuit module, which has been configured to correct a wavelength detected by each light detector and the wavelengths detected by each light detector has a known relationship to a wavelength detected by a reference light detector.