Optical Reader Microstructure Illumination
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Solution Overview
Problem
Existing optical assay arrangements face inefficiencies in illuminating and detecting light from reaction sites on polymeric substrates with protruding microstructures, leading to suboptimal signal-to-noise ratios due to the interaction of light paths with micropillars and substrate materials.
Innovation Solution
An optical reader and polymeric sample substrate configuration that controls the angle of incidence of exciting light rays using a light source and additional optical layers, guiding light to reaction sites and optimizing detection with a detector positioned to collect emitted light, enhancing the optical substrate properties for improved illumination and signal collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional optical readers illuminate polymeric substrates with protruding microstructures, then the substrate provides reaction sites for optical assays, but the interaction of light paths with micropillars and substrate materials reduces illumination efficiency and signal collection efficiency
Solution Approach 1:
The patent applies parameter changes by controlling the angle of incidence of exciting light rays and utilizing total internal reflection to optimize light propagation through the polymeric substrate. By changing the angular parameters of light injection, the system achieves efficient illumination of reaction sites while minimizing energy loss to the micropillar structures.
Solution Approach 2:
The patent introduces an intermediary approach by using the optical properties of the polymeric substrate itself as a waveguide to channel light to the reaction sites. The substrate material acts as a mediator that guides light through total internal reflection, overcoming the scattering and absorption issues caused by the micropillar structures.
2Measurement precision
If the optical reader detects light emitted from reaction sites on polymeric substrates, then analyte detection is enabled, but background noise from substrate and micropillar interactions reduces signal-to-noise ratio
Solution Approach 1:
The patent converts the potentially harmful effect of light interaction with micropillars and substrate into a beneficial phenomenon by exploiting total internal reflection. The micropillar structures and substrate material, which initially cause scattering and noise, are utilized as part of the light guiding mechanism to direct fluorescent signals toward the detector while minimizing background noise.
Solution Approach 2:
The patent applies local quality by optimizing light detection specifically at the reaction site locations on the substrate. By controlling light injection angles and utilizing the local optical properties of the polymeric material, the system enhances signal collection from specific reaction sites while rejecting background noise from other areas of the substrate and micropillars.
3Ease of operation
If exciting light is injected into polymeric substrates without controlled angle of incidence, then simple illumination is achieved, but inefficient light guidance to reaction sites occurs
Solution Approach 1:
The patent changes the angular parameter of light injection to optimize energy utilization. By controlling the angle of incidence within specific ranges that enable total internal reflection, the system achieves efficient light guidance to reaction sites while maintaining operational simplicity through automated angle control in the optical reader design.
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 configuration results in increased signal-to-noise ratios by efficiently illuminating and detecting light from reaction sites, reducing background noise and enhancing the detection of fluorescent signals through controlled light refraction and total internal reflection within the substrate.
Implementation Method 1
the optical substrate properties to guide the exciting light rays in the direction of a reaction site-area
Implementation Method 2
enhancing the detection of fluorescent signals through controlled light refraction and total internal reflection within the substrate
Implementation Method 3
Luminescent light is emitted either as fluorescent light or phosphorescent light, or as chemiluminescent light. Fluorescence and phosphorescence may be defined as the emission of electromagnetic radiation resulting from absorbed exciting electromagnetic radiation
Data Source
AI summary
An optical reader for an optical assay arrangement including a polymeric sample substrate having a reaction-site surface provided with protruding microstructures and at least one reaction-site area; a light source for illuminating the reaction-site area; and a detector device for detecting light emitted from the reaction-site area. The light source is arranged to inject exciting light rays into the polymeric sample substrate with a controlled angle of incidence such that the protruding microstructures guide the exciting light rays in the direction of the reaction-site area, and the detector device detects light emitted from the at least one reaction-site area.