Light Guide Plate Parallelogram Diffusers for Low Transmittance Detection
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Solution Overview
Problem
Existing detection devices face challenges in accurately detecting objects, such as microorganisms, when the culture medium in the culture vessel has low light transmittance, leading to difficulties in light passage and object detection.
Innovation Solution
A detection device is designed with a light-transmitting light guide plate, a plurality of light diffusion structures on one side of the plate, an optical sensor overlapping the plate, and a light source emitting light to the side surface of the plate. The light diffusion structures are arranged in a specific pattern forming a parallelogram, optimizing light distribution and scattering for improved detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a point light source is used to illuminate the culture medium, then the device structure is simple, but the detection accuracy deteriorates when the culture medium has low light transmittance
Solution Approach 1:
The invention divides the single point light source into multiple light sources arranged in a specific pattern. This segmentation allows light to enter the light guide plate from multiple positions, increasing the total light quantity that passes through the culture medium and improves detection accuracy without significantly increasing device complexity
Solution Approach 2:
The invention transitions from a single-point (0D) light source to a distributed array of light sources (1D or 2D arrangement). By arranging multiple light sources along a line or plane, the system increases light coverage and total light quantity while maintaining a relatively simple linear or planar structure
2Measurement precision
If light diffusion structures are added to improve light distribution, then detection accuracy improves, but the device complexity increases
Solution Approach 1:
The invention combines the light diffusion function directly into the light guide plate by forming light diffusion structures on its surface. This integration merges the light guiding and light diffusing functions into a single component, improving light distribution and detection accuracy without adding separate diffusion elements that would increase device complexity
Solution Approach 2:
The invention applies light diffusion structures only at specific locations on the light guide plate surface where light enters. By concentrating diffusion functionality at these critical points rather than throughout the entire structure, the system achieves improved light distribution with minimal additional complexity
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 optimized light distribution and scattering from the light diffusion structures enhance the total amount of scattered light, leading to improved detection accuracy of objects within the culture medium, even when light transmittance is low.
Implementation Method 1
a plurality of light diffusion structures provided on a surface on one side in a first direction of the light guide plate
Data Source
AI summary
A detection device includes: a light guide plate; light diffusion structures including first to fourth structures; an optical sensor; and a light source. A first side connecting a first center of the first structure to a second center of the second structure, a second side connecting the first center to a third center of the third structure, and a third side connecting the second center to the third center form a first isosceles triangle with the first side as a base and the second and third sides as equal sides. A fourth side connecting a fourth center of the fourth structure to the second center, a fifth side connecting the fourth center to the third center, and the third side form a second isosceles triangle with the fifth side as a base and the third and fourth sides as equal sides. The first and second isosceles triangles form a parallelogram.