Spectrometry Device Light Intensity Control for Accuracy
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Solution Overview
Problem
Existing spectrometry devices face measurement accuracy issues due to varying intensities of extraneous light, which require frequent calibration and increase measurement time, especially when environmental conditions change.
Innovation Solution
A spectrometry device equipped with a spectroscope, extraneous light detector, and light intensity control unit that maintains a constant light intensity ratio between illumination light and extraneous light, allowing for accurate measurements without the need for continuous calibration by adjusting the illumination light intensity based on detected extraneous light levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration process is performed each time spectrometry is performed, then measurement accuracy is maintained, but measurement time is increased
Solution Approach 1:
The system performs preliminary calibration to establish the relationship between illumination light intensity and extraneous light intensity, storing this calibration data for future use. This preliminary action allows subsequent measurements to reference pre-established calibration information rather than requiring full recalibration each time, thus reducing measurement time while maintaining accuracy through the use of stored calibration relationships.
Solution Approach 2:
The system continuously monitors extraneous light intensity and uses this feedback to adjust illumination light intensity dynamically. By implementing feedback control, the system can maintain accurate measurements without requiring repeated full calibration processes, as the real-time adjustments compensate for environmental changes automatically.
2Measurement precision
If intensity of extraneous light changes, then measurement accuracy decreases, but performing frequent calibration increases measurement time
Solution Approach 1:
The system dynamically adjusts illumination light intensity based on real-time extraneous light conditions rather than using static calibration values. This dynamic adaptation allows the system to maintain measurement accuracy under varying environmental conditions without requiring frequent recalibration, thereby improving measurement speed while preserving spectral measurement accuracy.
Solution Approach 2:
The system changes the intensity parameter of illumination light in response to extraneous light conditions. By adjusting this parameter dynamically, the system compensates for environmental variations that would otherwise degrade measurement accuracy, eliminating the need for frequent calibration and improving overall measurement efficiency.
3Measurement precision
If light intensity ratio between illumination light and extraneous light is maintained constant, then spectrometry accuracy is improved, but device complexity increases
Solution Approach 1:
The system introduces an extraneous light detector as an intermediary component that monitors environmental light conditions. This detector provides critical information that enables the control unit to adjust illumination light intensity appropriately, maintaining constant light intensity ratio and improving spectrometry accuracy without requiring complex overall system architecture.
Solution Approach 2:
The system replaces complex mechanical calibration mechanisms with an electronic control approach. Instead of requiring physical recalibration procedures, the system uses electronic sensors to detect extraneous light and electronically adjusts illumination intensity through control signals, simplifying the overall system 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 solution ensures high accuracy and speed in spectrometry by maintaining a consistent light intensity ratio, reducing measurement errors caused by changes in extraneous light intensity and eliminating the need for frequent calibration, even in varying environmental conditions.
Implementation Method 1
a light source that emits illumination light to a measurement target
Implementation Method 2
a spectroscopy element that performs spectroscopy on incident light from the measurement target
Implementation Method 3
The extraneous light detector detects the intensity of extraneous light
Data Source
AI summary
A spectrometry device includes a spectroscope, an extraneous light sensor, and a light intensity controller. The spectroscope includes a light source that emits illumination light to a medium and a wavelength-selective interference filter that performs spectroscopy on light incident from the medium. The extraneous light sensor detects the intensity of extraneous light which is incident on the medium. The light intensity controller controls the intensity of the illumination light emitted from the light source such that the light intensity ratio of the illumination light and the extraneous light is equal to a first value.