Microscopic Object Detection via Photothermal Collection
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Solution Overview
Problem
Existing techniques for collecting microscopic objects dispersed in a liquid using light irradiation do not effectively detect or quantify the amount of collected objects.
Innovation Solution
A microscopic object detection device that uses a collecting kit with a photothermal conversion region to collect microscopic objects by light irradiation, and includes a light source unit, an optical receiver, and a processor to calculate the amount of collected objects based on changes in the detection signal over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light irradiation is used to collect microscopic objects, then collection efficiency is improved, but detection capability of collected objects deteriorates
Solution Approach 1:
The patent divides the optical system into two separate systems: a light source system for collection and a detection system for measurement. The light source irradiates the sample at a first wavelength to generate thermal convection and collect particles, while the detection system uses a different wavelength to measure particle concentration without being interfered by the collection light. This segmentation resolves the contradiction by allowing both collection and detection to occur simultaneously without mutual interference.
Solution Approach 2:
The patent introduces an intermediary substance (absorbing particles or dye) that enhances the photothermal conversion efficiency of the sample. This intermediary allows the collection process to be more efficient while requiring less intense light irradiation, thereby reducing the interference with detection. The intermediary acts as a mediator that amplifies the collection effect without proportionally increasing the harmful thermal effects on detection.
2Speed
If thermal convection is generated for particle collection, then collection speed is improved, but particle distribution uniformity deteriorates
Solution Approach 1:
The patent employs periodic irradiation of the light source rather than continuous irradiation. By intermittently applying thermal convection, the system maintains collection speed while allowing particle redistribution during non-irradiation periods. This periodic action prevents excessive accumulation in specific regions and maintains more uniform particle distribution while still achieving efficient collection overall.
Solution Approach 2:
The patent dynamically adjusts the irradiation conditions (intensity, duration, position) of the light source based on real-time detection feedback. This dynamic control allows the system to optimize collection speed while preventing over-concentration of particles in specific areas, thereby maintaining distribution uniformity. The system adapts its parameters to balance collection efficiency with distribution homogeneity.
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 the efficient collection and quantification of microscopic objects in a liquid, providing a reliable method for determining the amount of collected objects.
Implementation Method 1
a photothermal conversion region that converts light into heat and is configured to hold the liquid sample on the photothermal conversion region
Implementation Method 2
The optical receiver detects light from the liquid sample held on the collecting kit and outputs a detection signal thereof
Implementation Method 3
The light source unit includes a laser light source that emits a laser beam with which the collecting kit is irradiated
Implementation Method 4
a fluorescent light source that emits light for exciting the plurality of microscopic objects. The plurality of microscopic objects emits fluorescence when excited
Implementation Method 5
a condenser lens that collects the plurality of laser beams at a same focal point
Data Source
AI summary
A microscopic object detection system includes a collecting kit and a detection device. The collecting kit has a thin film for converting light into heat and is configured to be capable of holding a sample on the thin film. The detection device detects a plurality of microscopic objects in the sample by collecting the plurality of microscopic objects dispersed in the sample with the collecting kit. The detection device includes a laser module, an optical receiver, and a controller. The laser module emits a laser beam with which the collecting kit is irradiated. The optical receiver detects the laser beam from the sample held by the collecting kit and outputs a detection signal thereof. The controller calculates an amount of the plurality of microscopic objects collected in the sample based on a change of the detection signal over time.