Polarization-Stable Optical Reader for Oral Fluid Analyte Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional analyte detection methods, particularly for drugs of abuse, require sample collection followed by laboratory analysis, leading to significant delays in obtaining results, which is undesirable in settings like workplace drug testing where immediate results are necessary for safety.
Innovation Solution
The use of polarization-maintaining optical components in the optical path of the reader hardware, combined with a scan head and photonic chip architecture, ensures stable and repeatable polarization state for optimal detection of analytes in oral fluid samples, allowing for on-site testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical components are used in the reader, then the device complexity is reduced and manufacturing is easier, but the measurement precision and detection reliability deteriorate due to polarization sensitivity variations
Solution Approach 1:
The patent changes the polarization parameter of the optical path by introducing polarization-maintaining fibers and polarization controllers. These components actively manage and maintain the polarization state of light throughout the optical path, transforming a potentially unstable parameter into a controlled and reliable one, thereby improving detection reliability without excessive complexity
Solution Approach 2:
The patent introduces polarization-maintaining fibers and polarization controllers as intermediary components between the light source and the photonic chip. These intermediaries act as mediators that ensure stable polarization coupling, isolating the system from polarization sensitivity variations and enabling reliable detection while managing the overall system complexity
2Measurement precision
If laboratory analysis is used for analyte detection, then the measurement precision is improved, but the loss of time increases significantly
Solution Approach 1:
The patent replaces the conventional mechanical laboratory testing system with an integrated optical detection system. By embedding the photonic chip and optical readout capabilities directly in the cartridge, the system eliminates the need for external laboratory equipment, thereby maintaining measurement precision while dramatically reducing the time required for analyte detection
Solution Approach 2:
The patent merges the sample processing, optical detection, and data analysis functions into a single integrated cartridge system. This consolidation combines multiple previously separate steps (sample preparation, laboratory analysis, result interpretation) into one unified platform, enabling rapid on-site testing without sacrificing detection accuracy
3Reliability
If polarization-maintaining components are added to the optical path, then the measurement precision and detection reliability are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent incorporates polarization-maintaining fibers and polarization controllers during the initial manufacturing process of the photonic chip assembly. By pre-configuring the polarization path during fabrication rather than requiring complex post-assembly alignment, the system achieves reliable polarization maintenance while simplifying the manufacturing process
Solution Approach 2:
The polarization-maintaining components are designed to automatically maintain the polarization state without requiring complex external control systems. The polarization-maintaining fibers inherently preserve the polarization path, and the integrated design allows the system to self-regulate polarization effects, reducing manufacturing complexity while ensuring consistent reader performance
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 rapid and reliable detection of analytes in oral fluid samples, reducing the need for laboratory analysis and providing immediate results, thereby enhancing safety and efficiency in drug testing scenarios.
Implementation Method 1
The inherent nature of the optical coupling to almost any photonic chip is highly polarization dependent in addition to the propagation through waveguides and also evanescent coupling of light to molecules, including biological molecules. Thus by fixing the polarization state of all four excitation channels to the optical transverse-magnetic (TM) polarization as described herein, we may achieve optimal and reliable performance of our system.
Implementation Method 2
The inherent nature of the optical coupling to almost any photonic chip is highly polarization dependent in addition to the propagation through waveguides and also evanescent coupling of light to molecules, including biological molecules.
Data Source
AI summary
Analyte collection and testing systems and methods, and more particularly to disposable oral fluid collection and testing systems and methods. Described herein are methods and apparatuses to achieve significant improvements in the detection of fluorescence signals in the reader.