Ring Light Microbial Imaging Apparatus for Reflection Reduction
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Solution Overview
Problem
Current methods for capturing images of microbial growth on solid culture media face challenges in achieving accurate representations due to optical reflections and varying colors and textures of bacterial colonies, which can lead to misidentification and inefficient analysis.
Innovation Solution
An image capture apparatus with a ring light for diffuse illumination and a frame to position the image capture device, support, and lighting devices, which helps distinguish between microbial growth and background reflections, providing high-quality images for microbiological assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a standard lighting system is used to illuminate the culture plate, then the overall brightness is sufficient, but specular reflections from the culture medium surface interfere with accurate image capture
Solution Approach 1:
A ring-shaped diffuser is introduced as an intermediary component between the light source and the culture plate. The diffuser scatters the direct light paths, converting specular reflections into diffuse illumination that evenly lights the culture medium without creating interfering reflection patterns in the captured images.
Solution Approach 2:
The lighting system provides different illumination qualities at different locations: the ring light with diffuser provides diffuse illumination from the sides, while a separate overhead light provides direct illumination from above. This localized differentiation of light quality allows simultaneous capture of both surface and subsurface features without reflection interference.
2Loss of information
If multiple lighting angles are used to capture different features, then comprehensive image data is obtained, but the device complexity increases
Solution Approach 1:
Multiple lighting functions are merged into a single integrated lighting assembly. The ring-shaped diffuser and overhead light source are combined in one structure that can be positioned together, allowing multiple illumination angles to be achieved without requiring separate, complex lighting systems for each angle.
Solution Approach 2:
The lighting system is designed to be adjustable and reconfigurable. The ring light can be positioned at different distances and angles, and the overhead light intensity can be adjusted, allowing the system to adapt to different imaging requirements without requiring multiple fixed lighting systems.
3Adaptability or versatility
If visual inspection by technologists is used to assess microbial growth, then flexible analysis is possible, but the analysis efficiency is low
Solution Approach 1:
The visual inspection process is replicated and enhanced through digital imaging. High-quality photographs of the culture plates are captured with the specialized lighting system, creating accurate digital copies that can be viewed, analyzed, and archived. This allows technologists to perform flexible visual analysis while dramatically increasing throughput by eliminating the need for direct observation of each plate.
Solution Approach 2:
The manual visual inspection process is partially replaced by an automated imaging system. The controlled lighting and camera capture system substitutes for the mechanical act of visually examining each plate, providing consistent, high-quality images that can be efficiently processed while retaining the flexibility of expert analysis.
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 apparatus captures accurate images of microbial growth, enabling effective microbiological assessments, both manual and automated, by reducing specular reflections and enhancing the distinction between growth and background, thus improving identification and analysis efficiency.
Implementation Method 1
a ring light between the image capture device and the support, for diffusely illuminating one side of the culture plate
Data Source
Figure 1
Figure 2(a)
Figure 2(b)~2(e)
AI summary
An apparatus for use in analysing microbial growth on a solid culture medium in a culture plate, the apparatus including an image capture device, a support for supporting the culture plate for the image capture device to capture an image of the solid culture medium and any microbial growth, a ring light between the image capture device and the support, for diffusely illuminating one side of the culture plate, and a frame for positioning the image capture device, support and ring light relative to each other.