Testing Device Illumination Control for Sample Analysis
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Solution Overview
Problem
Existing sample testing devices face challenges in reliably acquiring information on the presence or absence and quantity of samples in sample containers, particularly due to variations in viscosity and color of reaction products across different chips and samples, leading to unstable target object information acquisition.
Innovation Solution
A testing device equipped with a light source control unit, rotation mechanism, imaging unit, and information acquisition unit that acquires target object information by generating analysis images from multiple images taken at different lighting positions, calculating average brightness values to reduce brightness unevenness and enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light absorbance measurement is performed to test samples, then test results can be obtained, but stable acquisition of target object information (presence/absence and amount of sample) cannot be ensured across different chips due to variations in reaction product viscosity and color
Solution Approach 1:
The imaging unit captures images of the sample container before the reaction process completes, allowing detection of target object information (presence/absence and amount of sample) in advance. This preliminary imaging avoids the influence of varying reaction product properties that occur during and after the reaction
Solution Approach 2:
The imaging unit creates visual copies (images) of the sample container and its contents, which can be analyzed to determine target object information. This optical copying method provides a stable representation that is independent of the physical and chemical changes occurring in the reaction products
2Measurement precision
If multiple light sources are used at different positions to illuminate the chip, then brightness unevenness is reduced and image quality improves, but device complexity increases
Solution Approach 1:
The illumination system is divided into multiple independent light sources positioned at different locations around the chip. Each light source illuminates a specific region, and by controlling them individually, uniform overall illumination is achieved while maintaining relatively simple individual components
Solution Approach 2:
The multiple light sources serve dual purposes: they provide illumination for imaging to reduce brightness unevenness, and they can be controlled to illuminate specific areas for different detection needs. This multi-functionality justifies the added complexity by providing multiple benefits from the same structural addition
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
This approach allows for stable and accurate acquisition of target object information, independent of reaction product viscosity and color, enabling reliable sample testing across various chips and samples without increasing device size or complexity.
Implementation Method 1
at least one light source that can be lit at different positions
Implementation Method 2
an imaging unit that acquires a plurality of individual images by shooting, at each of the different positions at different times respectively, the chip located, by being rotated by the rotation mechanism, in an illuminated area illuminated by the lighting of the at least one light source
Implementation Method 3
a rotation mechanism that rotates a chip loaded with a storage container for storing a test object
Data Source
AI summary
A testing device includes: at least one light source that can be lit at different positions; a light source control unit that controls the lighting of the light source(s); a rotation mechanism that rotates a chip; an imaging unit that acquires a plurality of individual images by shooting, at each of the different positions at different times respectively, the chip located, by being rotated by the rotation mechanism, in an illuminated area illuminated by the light source(s); an image generation unit that generates an analysis image based on the plurality of individual images; and an information acquisition unit that acquires target object information on the state of the test object or of the storage container based on the analysis image. The brightness value of each pixel in the analysis image is calculated using the brightness values of the pixels at the same position among the plurality of individual images.