Microfluidic Grating Layer Wavelength Segregation
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Solution Overview
Problem
Current microfluidic apparatuses face complexity in structure and fabrication methods, particularly in segregating light into narrow wavelength ranges for substance detection, often resulting in cross-light interference and inaccurate separations.
Innovation Solution
A microfluidic apparatus with a grating layer comprising multiple grating blocks of different wavelength selectivity, optically coupled to microfluidic channels, which diffract light into collimated beams of specific wavelengths for detection by corresponding detectors, using a black matrix layer to reduce interference, and a method involving a light source, grating layer, and microfluidic channels to achieve precise wavelength-specific detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional light segregation methods are used in microfluidic apparatus, then structure and fabrication become complex, but wavelength-specific detection precision deteriorates due to cross-light interference
Solution Approach 1:
The grating layer is divided into multiple grating blocks, each responsible for diffracting a specific wavelength range into a collimated beam. This segmentation allows precise wavelength-specific detection for different microfluidic channels while maintaining a relatively simple overall structure, resolving the contradiction between detection precision and structural complexity
Solution Approach 2:
A black matrix layer is introduced as an intermediary component between the grating blocks and detectors. This black matrix layer blocks stray light and reduces cross-light interference, thereby improving detection accuracy without significantly increasing device complexity
2Measurement precision
If conventional light segregation methods are used in microfluidic apparatus, then structure and fabrication become complex, but cross-light interference increases reducing detection accuracy
Solution Approach 1:
The black matrix layer serves as an intermediary that actively blocks stray light and reduces cross-light interference between adjacent wavelength channels. This directly addresses the harmful factor of cross-light interference while maintaining detection accuracy
Solution Approach 2:
Each grating block is designed with specific local optical properties to diffract only its designated wavelength range into a collimated beam. This localized wavelength-specific diffraction minimizes cross-light interference at each detection point while maintaining overall system simplicity
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 solution simplifies the structure and fabrication of microfluidic apparatuses by enabling precise detection of substances through wavelength-specific light segregation, reducing cross-light interference and improving detection accuracy.
Implementation Method 1
a grating layer on the second side of the first substrate, the grating layer comprising a plurality of grating blocks of different wavelength selectivity... configured to diffract light emitted from a light source into substantially collimated light having a selected wavelength range
Data Source
AI summary
A microfluidic apparatus is provided. The microfluidic apparatus includes a first substrate having a first side and a second side opposite to each other; a grating layer on the second side of the first substrate, the grating layer including a plurality of grating blocks of different wavelength selectivity; a second substrate having a third side and a fourth side opposite to each other; the fourth side of the second substrate on a side of the third side away from the first substrate, and the second side of the first substrate on a side of the first side away from the second substrate; a light detection layer on the third side of the second substrate, the light detection layer including a plurality of detectors; and a microfluidic layer between the first substrate and the light detection layer, the microfluidic layer including a plurality of microfluidic channels.