Polarized Microscope Kerr Rotation Correction Across the Image Field
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Solution Overview
Problem
Existing polarized microscopes and magnetic domain observation microscopes face challenges in accurately measuring magnetic characteristics with high precision due to variations in polarization characteristics across the intra image field, making it difficult to quantitatively evaluate hysteresis loops.
Innovation Solution
A polarized microscope equipped with an image processor that calculates a device integer and rotation angles of Kerr rotation for each region of interest (ROI) by adjusting the orientations of the polarizer and analyzer, and performs intra image field correction analysis using multiple hysteresis loops at different angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a polarized microscope is used to measure magnetic characteristics, then magnetic domain patterns can be observed, but variations in polarization characteristics across the intra image field cause measurement imprecision
Solution Approach 1:
The patent applies local quality by measuring and correcting polarization characteristics for each region of interest (ROI) within the intra image field. Instead of using a single uniform correction, the system calculates device integers and performs corrections individually for each ROI, accounting for local variations in polarization characteristics across the image field.
Solution Approach 2:
The patent implements feedback by measuring the actual polarization characteristics at multiple angles, comparing them with expected values, and using the differences to calculate correction values. The system obtains hysteresis loops at different angles, processes them to extract polarization information, and uses this feedback to correct measurements and improve quantification accuracy.
2Measurement precision
If multiple hysteresis loops are obtained at different angles for correction analysis, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the intra image field into multiple regions of interest (ROIs) and processing each region independently. The system obtains hysteresis loops for each ROI at different angles and processes them separately, which allows for localized correction while managing computational complexity through modular processing.
Solution Approach 2:
The patent utilizes parameter changes by obtaining hysteresis loops at multiple different angles (e.g., first angle and second angle) and processing the images at these different angular parameters. This allows the system to extract polarization characteristic information and calculate correction values by analyzing how the hysteresis loops change with angle, enabling precise correction while maintaining manageable processing complexity through systematic parameter variation.
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
Enables precise measurement of magnetic characteristics by correcting for variations in polarization across the image field, allowing for accurate quantification of hysteresis loops and improved magnetic domain pattern recognition.
Implementation Method 1
a polarizer configured to interact with the generated illumination light to transmit rectilinear polarized light having a first orientation
Implementation Method 2
an analyzer configured to transmit a component of rectilinear polarized light reflected by a sample, the reflected rectilinear polarized light having a second orientation
Implementation Method 3
calculate a rotation angle of a Kerr rotation of each ROI by using the device integer and the plurality of hysteresis loops
Data Source
AI summary
The polarized microscope includes a light source configured to generate illumination light, a polarizer configured to interact with the generated illumination light to transmit rectilinear polarized light having a first orientation, an analyzer configured to transmit a component of rectilinear polarized light reflected by a sample, the reflected rectilinear polarized light having a second orientation, an image obtainer configured to obtain an image of the reflected rectilinear polarized light, and an image processor configured to process the obtained image, wherein the image processor is configured to calculate a device integer, obtain a plurality of hysteresis loops for each of regions of interest (ROIs), and calculate a rotation angle of a Kerr rotation of each ROI by using the device integer and the plurality of hysteresis loops.


