Polarization Analysis Rectangular Wave Phase Correction
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Solution Overview
Problem
Existing polarization analysis apparatuses face challenges in accurately calculating the degree of polarization due to phase relationship inaccuracies and offset issues when using rectangular wave signals, which affect the precision of viscosity and substance analysis in fluorescence polarization immunoassays.
Innovation Solution
A polarization analysis apparatus with a controller that corrects the rectangular wave signal by calculating and applying a corrected reference voltage, ensuring the luminance change forms a sine wave, thereby improving the accuracy of polarization degree calculation through precise phase control and image sensor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rectangular wave signal is used to drive the polarization selection element, then the device complexity is reduced and operation is simplified, but the calculation accuracy of polarization degree deteriorates due to phase relationship inaccuracies and offset issues
Solution Approach 1:
The patent applies parameter changes by introducing a correction value that modifies the rectangular wave drive signal parameters. Specifically, the correction value compensates for phase relationship inaccuracies and offset issues in the rectangular wave signal, allowing the system to maintain simple rectangular wave control while achieving accurate polarization degree calculation through parameter adjustment rather than fundamental signal waveform change
2Ease of operation
If phase relationship control is relaxed, then the ease of operation improves, but the measurement precision of polarization degree deteriorates
Solution Approach 1:
The patent implements feedback by calculating a correction value based on the actual phase relationship between the rectangular wave signal and the sine wave signal. This correction value is then applied to compensate for phase deviations, creating a feedback loop that maintains measurement accuracy without requiring strict manual phase control. The system automatically adjusts for phase relationship variations through this feedback mechanism
3Measurement precision
If a sine wave drive signal is used, then the measurement precision of polarization degree is maintained, but the device complexity increases and productivity decreases
Solution Approach 1:
The patent substitutes the mechanical approach of using complex sine wave signals with an electronic correction approach. Instead of generating complex sine wave drive signals that require precise phase control hardware, the system uses simple rectangular wave signals enhanced by computational correction values. This substitution maintains measurement precision while improving productivity through faster, simpler signal generation and processing
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
The correction of the rectangular wave signal enhances the calculation accuracy of the polarization degree, leading to improved precision in estimating liquid viscosity and substance analysis, even in cases where phase relationships are not constant.
Implementation Method 1
a light source that radiates first light causing a sample to be in an excitation state
Implementation Method 2
a polarization selection element that outputs polarized light in a specific direction from second light radiated from the excited state sample in response to a voltage applied based on control information on a rectangular wave
Data Source
AI summary
A polarization analysis apparatus includes: a light source that radiates light to a sample; a liquid crystal panel that outputs polarized light in a specific direction from light radiated from an excited state sample; an image sensor that measures a luminance of polarized light; and a controller that controls the liquid crystal panel and the image sensor. The controller calculates a reference voltage of a rectangular wave; calculates a corrected reference voltage by correcting the reference voltage in the rectangular wave where an absolute value of the reference voltage changes in response to a phase change; applies the reference voltage and the corrected reference voltage to the liquid crystal panel; operates the image sensor in accordance with a light exposure time to measure luminance of polarized light; and calculates a degree of polarization of the sample based on results of the measurement.