Optical Particle Counter Refractive Index Optimizer
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Solution Overview
Problem
Optical particle counters face challenges in accurately detecting and characterizing nanoscale particles across different fluid refractive indices, requiring frequent recalibration when switching between fluids, which is time-consuming and costly.
Innovation Solution
The development of optical particle analyzers that account for and adjust to the refractive index of the carrier fluid, using a refractive index optimizer to optimize the focal point and collection of electromagnetic radiation, allowing for precise detection and characterization of particles without the need for recalibration across various fluid compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual recalibration is performed each time a fluid with different refractive index is analyzed, then measurement accuracy is maintained, but productivity decreases and time is lost
Solution Approach 1:
The system automatically measures the refractive index of the carrier fluid and adjusts optical parameters without requiring manual intervention. The refractive index optimizer continuously monitors fluid properties and self-adjusts the optical system to maintain optimal particle detection across different fluid types.
Solution Approach 2:
The system incorporates feedback mechanisms where the refractive index measurement is used to automatically adjust optical parameters. The refractive index optimizer receives real-time data about fluid properties and continuously adjusts the optical system to compensate for refractive index variations, maintaining measurement accuracy without manual recalibration.
2Measurement precision
If the particle counter is taken offline for recalibration, then measurement accuracy is ensured, but loss of time increases
Solution Approach 1:
The refractive index optimizer enables the system to self-calibrate by automatically measuring the refractive index of the carrier fluid and adjusting optical parameters in real-time. This eliminates the need to take the particle counter offline for manual recalibration, maintaining continuous operation while ensuring measurement accuracy.
Solution Approach 2:
The system performs preliminary measurement of the carrier fluid's refractive index before particle analysis begins. By measuring the refractive index in advance and using this information to pre-adjust optical parameters, the system avoids the need for time-consuming offline recalibration procedures.
3Measurement precision
If very powerful lasers and detectors are used to detect nanoscale particles, then detection capability improves, but device complexity increases
Solution Approach 1:
The refractive index optimizer dynamically adjusts optical parameters such as laser power, detector gain, and focus position based on the measured refractive index of the carrier fluid. By continuously optimizing these parameters, the system maintains high detection capability for nanoscale particles while avoiding the need for excessively powerful and complex optical components.
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 accurate and reliable detection of nanoscale particles in different fluids, improving sensitivity and resolution by automatically adjusting to changes in refractive index, reducing the need for manual recalibration and enhancing compatibility with multiple fluid compositions.
Implementation Method 1
The electromagnetic radiation interacts (scatters, reflects, is obscured by, is emitted from, etc.) with particles found within the flow cell
Implementation Method 2
The electromagnetic radiation interacts (scatters, reflects, is obscured by, is emitted from, etc.) with particles found within the flow cell
Implementation Method 3
a change in refractive index of the fluid being analyzed may reduce or eliminate the efficacy of the particle detector because the change in refractive index alters the path of the electromagnetic radiation as it passes through the flow cell
Data Source
AI summary
Provided herein are systems and methods of optical particle counters which account and adjust for the refractive index of the carrier fluid being analyzed. The provided systems are robust and may be implemented in a variety of optical particle counters including obscured light, reflected light, emitted light and scattered light particle counters. The described systems may be useful with any fluid, including gases or liquids. In some cases, the system can account for the differences in refractive index between two liquids, for example, ultrapure water and an acid, such as sulfuric, hydrochloric, hydrofluoric, acetic, phosphoric, chromic phosphoric, and the like. By accounting for the refractive index of the carrier fluid, the described systems and methods are also more sensitive and able to more accurately detect and characterize smaller particles, including nanoscale sized particles.