Segmented Light Guide Portions for Accurate Biological Detection
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Solution Overview
Problem
Existing optical biosensors face challenges in effectively guiding light to light-receiving elements, such as photodiodes, which hinders accurate detection of biological information.
Innovation Solution
A detection device is designed with a light guide portion that includes multiple light guide paths and a light-absorbing portion, allowing light to be directed efficiently to the light-receiving elements, enhancing light distribution and detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional light guiding structures are used in optical biosensors, then the device structure is simple, but light guidance to light-receiving elements is insufficient
Solution Approach 1:
The light guide portion is segmented into multiple functional regions: light guide paths for light transmission, light-absorbing portions for selective absorption, and light-transmitting portions for light passage. This segmentation enables precise control of light distribution to multiple light-receiving elements while maintaining a relatively simple overall structure that can be integrated into the sensor substrate.
2Measurement precision
If light guide paths are designed to overlap multiple light-receiving elements, then light distribution improves, but manufacturing precision requirements increase
Solution Approach 1:
Different regions of the light guide portion are assigned different optical properties: light guide paths have high light transmittance for guiding light to multiple elements, while light-absorbing portions have high absorbance to prevent stray light. This local differentiation of material properties enables precise light control and improves detection accuracy while the patterns can be manufactured using standard photolithography techniques.
3Measurement precision
If light-absorbing portions are added to the light guide structure, then light distribution control improves, but device complexity increases
Solution Approach 1:
The light guide paths, light-absorbing portions, and light-transmitting portions are merged into a single integrated light guide portion structure that is formed as one component during manufacturing. This merging approach provides precise light distribution control through the different functional regions while avoiding the complexity of assembling multiple separate components, as the entire structure can be created using photolithography and material deposition techniques in a unified process.
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 solution ensures improved light guidance to light-receiving elements, thereby enhancing the detection of biological information with increased accuracy and efficiency.
Implementation Method 1
a light-absorbing portion having higher absorbance of the light than that of the light guide paths
Data Source
AI summary
According to an aspect, a detection device includes: a plurality of light-receiving elements configured to receive light; and a light guide portion one surface of which faces the light-receiving elements. The light guide portion includes a plurality of light guide paths provided throughout from the one surface to the other surface of the light guide portion, and a light-absorbing portion having higher absorbance of the light than that of the light guide paths. When viewed from a direction in which the light-receiving elements and the light guide portion are stacked, more than one of the light guide paths overlap one of the light-receiving elements.