Optical Magnetic Resonance Noise Correction
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Solution Overview
Problem
In optically detected magnetic resonance, the weak detection signal from fluorescence is susceptible to noise, leading to decreased measurement accuracy.
Innovation Solution
A measurement device and method that utilize a magnetic resonance member, high frequency magnetic field generator, light emitting device, fluorescence light receiving device, and arithmetic processing device to perform electron spin quantum operations and derive measurement values by subtracting preceding and succeeding measurement values from the main measurement value in a predetermined ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fluorescence detection is used for magnetic resonance measurement, then the measurement can be performed optically, but the detection signal is weak and susceptible to noise
Solution Approach 1:
The patent applies preliminary action by performing background noise measurements before and after the main measurement. The arithmetic processing device subtracts the preceding measurement value and succeeding measurement value from the main measurement value to remove noise components that are present regardless of the measured field application.
Solution Approach 2:
The patent implements feedback by using the preceding and succeeding measurement values to correct the main measurement value. The arithmetic processing device continuously refines the measurement result by subtracting noise components identified from background measurements, thereby improving measurement precision through iterative correction.
2Measurement precision
If noise components are present in the fluorescence signal, then measurement accuracy decreases, but adding correction measurements increases measurement time
Solution Approach 1:
The patent performs preliminary noise characterization by measuring before and after the main measurement. These preliminary measurements capture the noise floor and background signal characteristics, which are then subtracted from the main measurement to improve accuracy without requiring complex real-time noise filtering during the main measurement.
Solution Approach 2:
The patent uses periodic action by taking measurements at regular intervals: a preceding measurement before the main measurement and a succeeding measurement after it. This periodic sampling approach allows noise to be characterized and removed systematically, improving accuracy while keeping the additional time required minimal and predictable.
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 solution effectively suppresses noise components and improves measurement accuracy by correcting the main measurement value using noise component measurements taken before and after the main measurement.
Implementation Method 1
electron spin resonance of a sensing member such as a diamond structure having nitrogen and lattice defects (NV center: Nitrogen Vacancy Center) is utilized
Implementation Method 2
a first n/2 pulse of a microwave is applied to the NV center, (c) a second n/2 pulse of the microwave is applied to the NV center
Implementation Method 3
An amount of light of fluorescence emitted from the magnetic resonance member is detected
Implementation Method 4
excitation light for initialization and measurement) and a microwave are applied in a predetermined sequence
Implementation Method 5
The fluorescence light receiving device receives fluorescence light emitted by the magnetic resonance member in response to the excitation light and generates a fluorescence sensor signal corresponding to an intensity of the fluorescence
Data Source
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AI summary
A light receiving device 13 receives fluorescence emitted by a magnetic resonance member 1 in response to an excitation light and generates a fluorescence sensor signal corresponding to a fluorescence intensity. An arithmetic processing device 31 derives a measurement value based on the fluorescence sensor signal or a detection signal that is obtained from the fluorescence sensor signal. A measurement value, which is measured when the measured field is applied to the magnetic resonance member 1, is defined as a main measurement value. A measurement value, which is measured when the measured field is not applied to the magnetic resonance member 1 and before the main measurement value is measured, is defined as a preceding measurement value. A measurement value, which is measured when the measured field is not applied to the magnetic resonance member and after the main measurement value is measured, is defined as a succeeding measurement value. The arithmetic processing device 31 respectively subtracts the preceding measurement value and the succeeding measurement value from the main measurement value at a predetermined ratio to derive the measurement value of the measured field.