Micromirror Arrays for High Multiplex Optical Analysis
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Solution Overview
Problem
Increasing the multiplex capability of optical analytical systems while minimizing negative impacts such as inter-reaction cross-talk, decreased signal-to-noise ratios, and increased complexity, particularly in highly sensitive reaction analyses.
Innovation Solution
The development of substrates with arrays of micromirrors and zero-mode waveguides, where each micromirror is associated with a zero-mode waveguide, enhancing illumination intensity through constructive interference and reducing cross-talk by redirecting light efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the multiplex capability of optical analytical systems is increased, then the overall throughput and usefulness of the system is improved, but the system complexity, inter-reaction cross-talk, and decreased signal-to-noise ratios worsen
Solution Approach 1:
The system divides the analytical process into multiple independent reaction regions arranged in arrays, with each region capable of simultaneous analysis. This segmentation allows high multiplexing (increased throughput) while maintaining manageable system complexity through modular design and standardized reaction containers
Solution Approach 2:
The patent transitions from single-reaction analysis to multi-reaction arrays by adding spatial dimensionality. Multiple reaction regions are arranged in two-dimensional arrays, enabling simultaneous analysis of many samples without proportionally increasing system complexity, as the same basic reaction container design is replicated across the array
2Productivity
If the multiplex factor is increased, then the overall throughput is improved, but inter-reaction cross-talk increases
Solution Approach 1:
Reaction regions are physically separated into discrete, isolated compartments within the array. Each reaction region is contained in its own well or chamber with physical barriers that prevent molecular diffusion and optical cross-contamination between adjacent reactions, thereby eliminating inter-reaction cross-talk while maintaining high multiplex capability
Solution Approach 2:
Optical elements such as microlenses, mirrors, or waveguides are introduced as intermediaries between the excitation source and each reaction region, and between each reaction region and the detector. These intermediaries enable selective optical addressing and detection of individual reaction regions, preventing optical cross-talk while allowing simultaneous monitoring of multiple reactions
3Productivity
If the multiplex factor is increased, then the overall throughput is improved, but signal-to-noise ratios decrease
Solution Approach 1:
By arranging reaction regions in spatial arrays and using position-dependent optical excitation and detection, the system can selectively monitor specific regions of interest while ignoring others. This spatial selectivity reduces background noise from non-reacting areas and improves signal-to-noise ratios for individual reactions within the multiplexed system
Solution Approach 2:
Optical intermediaries such as confocal pinholes, spatial filters, or waveguide structures are positioned between reaction regions and detectors to reject out-of-focus or stray light. These intermediaries improve signal-to-noise ratios by selectively transmitting only the desired signal from each reaction region while blocking background noise and cross-talk from surrounding areas
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
Enables high multiplex analysis of reaction regions with improved signal-to-noise ratios and increased throughput, allowing for sensitive and efficient analysis of multiple reactions simultaneously without significant increases in system size or power.
Implementation Method 1
enhancing illumination intensity through constructive interference
Implementation Method 2
redirecting light efficiently
Data Source
AI summary
Processes for making high multiplex arrays for use in analyzing discrete reactions at ultra high multiplex with reduced optical noise, and increased system flexibility. The high multiplex arrays include substrates having integrated optical components that increase multiplex capability by one or more of increasing density of reaction regions, improving transmission of light to or collection of light from discrete reactions regions. Integrated optical components include reflective optical elements which re-direct illumination light and light emitted from the discrete regions to more efficiently collect emitted light. Particularly preferred applications include single molecule reaction analysis, such as polymerase mediated template dependent nucleic acid synthesis and sequence determination.