Variable Excitation Light Irradiation for Substance Identification

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Solution Overview

Problem

Existing substance identification methods using light face challenges in distinguishing between substances with similar emission data when measured under fixed light irradiation conditions, leading to inaccurate identification.

Innovation Solution

A substance identification device that sets and varies the irradiation conditions of excitation light, including wavelength, intensity, and duration, to measure emission data for delayed fluorescence or phosphorescence, allowing for the differentiation of substances based on unique emission spectra and lifetimes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If fixed light irradiation condition is used, then measurement simplicity is improved, but substance identification accuracy deteriorates due to similar emission data for different substances

Engineering Contradiction:

Improvemeasurement simplicityVSAvoidsubstance identification accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent applies dynamics by making the irradiation condition variable rather than fixed. The irradiation condition changing unit dynamically adjusts parameters such as irradiation time, irradiation amount, and wavelength of excitation light based on substance characteristics, enabling the system to adapt to different substances and achieve accurate identification while maintaining operational simplicity through automated control.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements parameter changes by systematically varying key irradiation parameters including irradiation time, irradiation amount, and excitation light wavelength. By changing these parameters and measuring emission data under multiple conditions, the system distinguishes between substances with similar emission characteristics under fixed conditions, thereby improving identification accuracy without significantly complicating the measurement process.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If irradiation condition is varied to improve identification accuracy, then substance identification accuracy is improved, but device complexity increases

Engineering Contradiction:

Improvesubstance identification accuracyVSAvoidirradiation condition control complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies universality by designing an irradiation condition changing unit that can perform multiple functions: adjusting irradiation time, controlling irradiation amount, and changing excitation light wavelength. This multi-functional component consolidates what would otherwise require separate control systems, achieving accurate substance identification under varied conditions while limiting device complexity through functional integration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements feedback by using measured emission data to inform subsequent irradiation condition adjustments. The system measures emission data under initial conditions, analyzes the results, and uses this information to determine optimal subsequent irradiation parameters, creating a closed-loop control system that achieves high identification accuracy through adaptive, data-driven parameter optimization.

Inventive Principle:

Principle #23Feedback

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 high-accuracy substance identification by capturing specific emission data characteristics, such as emission spectrum curves and time decay curves, even for substances with similar appearances under visible light.

Implementation Method 1

measures emission data for delayed fluorescence or phosphorescence of the object which occurs in response to the irradiation with the excitation light

Methodology Applied

Scientific EffectDelayed fluorescence: Fluorescence

Implementation Method 2

measures emission data for delayed fluorescence or phosphorescence of the object which occurs in response to the irradiation with the excitation light

Methodology Applied

Scientific EffectPhosphorescence: Phosphorescence

Data Source

PatentUS11835456B2Substance identification device, substance identification method and substance identification program

Publication Date: 2023.12.05 THE UNIV OF TOKYO

AI summary

A substance identification device, a substance identification method and a substance identification program that can identify substances with high accuracy by means of light are provided. A substance identification device 10 includes a setting unit 11 that sets an irradiation condition of excitation light, an irradiation unit 12 that irradiates an object 100 with the excitation light under the irradiation condition, a measurement unit 13 that measures emission data for delayed fluorescence or phosphorescence of the object 100 which occurs in response to the irradiation with the excitation light, and an identification unit 15 that identifies a substance constituting the object based on the emission data and emission data for delayed fluorescence or phosphorescence which are measured when a plurality of substances are each irradiated with the excitation light under the irradiation condition.