Spectrometer Built-in Calibration Path
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Solution Overview
Problem
Existing spectrometer calibration methods are cumbersome and limited to lab environments, making them unsuitable for complex environments and requiring regular calibration with a diffusive reflective standard sample.
Innovation Solution
An in-use calibration method for spectrometers that involves providing a spectrometer device with both an optical measurement element and an optical calibration element, performing two measurements (one with and one without a sample), and deriving calibrated optical properties from these measurements without the need for a standard sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If regular calibration with a standardized reference sample is performed, then measurement precision is maintained, but device complexity and operation time increase
Solution Approach 1:
The spectrometer performs self-calibration using an integrated optical calibration element that automatically compensates for environmental drifts and component aging. The system calibrates itself without requiring external reference samples or manual intervention, eliminating the need for time-consuming calibration procedures while maintaining measurement precision.
Solution Approach 2:
The optical calibration element is pre-installed within the spectrometer housing, ready to perform calibration measurements automatically. This preliminary setup allows the system to conduct calibration actions continuously or periodically without requiring external reference samples or manual calibration procedures, thus saving time while maintaining accuracy.
2Measurement precision
If calibration with a standardized reference sample is performed, then measurement precision is maintained, but ease of operation decreases
Solution Approach 1:
The spectrometer performs self-calibration using an integrated optical calibration element that automatically compensates for environmental drifts and component aging. The system calibrates itself without requiring external reference samples or manual intervention, eliminating the need for time-consuming calibration procedures while maintaining measurement precision.
Solution Approach 2:
The calibration function is extracted from the external calibration process and integrated into the spectrometer itself. The optical calibration element is built within the device housing, allowing the system to perform calibration autonomously without requiring external reference samples or complex manual procedures, thereby simplifying operation while maintaining precision.
3Adaptability or versatility
If calibration is performed in complex environments, then adaptability improves, but measurement precision deteriorates due to environmental influences
Solution Approach 1:
The spectrometer performs self-calibration using an integrated optical calibration element that automatically compensates for environmental drifts and component aging. The system calibrates itself without requiring external reference samples or manual intervention, eliminating the need for time-consuming calibration procedures while maintaining measurement precision.
Solution Approach 2:
The optical calibration element provides continuous feedback about the spectrometer's performance under current environmental conditions. This feedback mechanism allows the system to detect and compensate for environmental drifts in real-time, maintaining measurement precision while adapting to complex environmental variations without requiring external reference samples.
4Measurement precision
If a diffusive reflective standard sample is used for calibration, then measurement precision is maintained, but device complexity increases
Solution Approach 1:
The optical calibration element is merged with the spectrometer housing, integrating the calibration function into the device itself. This integration eliminates the need for separate external reference samples and calibration procedures, reducing overall system complexity while maintaining measurement precision through the built-in calibration capability.
Solution Approach 2:
The spectrometer performs self-calibration using an integrated optical calibration element that automatically compensates for environmental drifts and component aging. The system calibrates itself without requiring external reference samples or manual intervention, eliminating the need for time-consuming calibration procedures while maintaining measurement 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 method allows for accurate and efficient spectroscopy in complex environments without the need for regular calibration with a standard sample, reducing measurement errors and enabling wider application of spectroscopy, including in consumer devices.
Implementation Method 1
transferring the emitted light to the detector along at least one optical calibration path independent from the optical measurement path
Implementation Method 2
the optical measurement path comprises at least one reflection at the at least one sample
Data Source
AI summary
Disclosed herein is an in-use calibration method for a spectrometer device. The method includes:providing the at least one spectrometer device including at least one optical measurement element and at least one optical calibration element having different optical properties;providing at least one sample;performing at least two measurements using the spectrometer device;generating by the at least one detector at least one first detector signal S_d1 according to the measurement without the sample and at least one second detector signal S_d2 according to the measurement with the sample; andderiving at least one calibrated optical property of the at least one sample from the first detector signal S_d1 and the second detector signal S_d2.Further disclosed herein are a spectrometer device configured for performing an in-use calibration method and various uses thereof.