Refractometer Wavelength Calibration via External Traceable Unit
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Solution Overview
Problem
Refractometers face measurement errors due to deviations in wavelength and temperature, which are not easily correctable, leading to inaccuracies in refractive index determination, especially as optical components age or become misadjusted over time.
Innovation Solution
A calibration device and method that allow for external, traceable calibration of refractometers by determining discrepancies between set-point and actual operation wavelength characteristics, using a detachable determination unit and wavelength control unit to adjust the refractometer's wavelength, ensuring accurate measurements without disturbing the sensitive interior of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the refractometer operates for long periods, then productivity is improved, but measurement precision deteriorates due to wavelength drift and optical component aging
Solution Approach 1:
The patent implements a feedback mechanism where a determination unit continuously monitors the actual operation wavelength of the refractometer and compares it against the set-point wavelength. When deviations are detected, the system automatically triggers wavelength calibration, ensuring measurement precision is maintained throughout long-term operation without manual intervention.
Solution Approach 2:
The refractometer performs self-calibration of its wavelength characteristic through an integrated determination unit and wavelength control unit. The system automatically detects wavelength deviations and adjusts its own operation wavelength without requiring external calibration equipment or disassembly, enabling long-term autonomous operation with sustained measurement accuracy.
2Measurement precision
If the refractometer is opened for calibration, then wavelength accuracy can be corrected, but device complexity and risk of damage increase
Solution Approach 1:
The patent extracts the wavelength determination function into a separate, dedicated determination unit that operates independently within the refractometer system. This modular approach allows the determination unit to be calibrated separately using simple external equipment without requiring disassembly of the main refractometer body, simplifying the calibration procedure while maintaining measurement precision.
Solution Approach 2:
The determination unit serves as an intermediary between the light source and the measurement system, providing a dedicated interface for wavelength monitoring and calibration. This intermediary component can be accessed and calibrated externally without opening the sealed refractometer interior, reducing device complexity and minimizing risk to sensitive optical components.
3Measurement precision
If mechanical adjustments are made to correct wavelength drift, then measurement accuracy improves, but reliability deteriorates due to additional moving parts
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with an optical/electronic wavelength control system. The wavelength control unit adjusts the operation wavelength through optical or electronic means rather than mechanical realignment of components, eliminating moving parts while maintaining the ability to correct wavelength drift and improve measurement accuracy.
Solution Approach 2:
The system corrects wavelength deviations by changing operational parameters (such as light source characteristics or optical path properties) rather than through mechanical adjustments. The wavelength control unit modifies these parameters to realign the operation wavelength with the set-point, improving measurement precision without introducing mechanical complexity that would reduce reliability.
Data Source
AI summary
Calibration device for calibrating an operation wavelength characteristic of a refractometer for determining an information which is indicative for a refractive index of the sample, wherein the calibration device comprises an itself traceably calibratable determination unit, which is preferably at least partially external of the refractometer, which is adapted for determining an information which is indicative for a discrepancy between a pre-givable set-point-operation wavelength characteristic and an actual-operation wavelength characteristic of the refractometer, on whose basis the refractometer is calibratable.