Cuvette Carrier Polarization Retrofit for DLS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current laboratory instruments for dynamic light scattering (DLS) are unable to measure different polarization states of scattered light, limiting their ability to perform depolarised dynamic light scattering (DDLS) measurements, and upgrading or replacing these systems is expensive.
Innovation Solution
A cuvette carrier with transmissive regions and optical polarizers is introduced, allowing existing DLS systems to perform DDLS measurements by polarizing and detecting scattered light, enabling the measurement of both horizontal and vertical components of scattered light through rotation of the carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing DLS instruments are used without modification, then the system remains simple and cost-effective, but it cannot perform depolarised dynamic light scattering measurements to detect different polarization states of scattered light
Solution Approach 1:
The invention divides the DDLS measurement capability into a separate, modular cuvette carrier unit that can be independently attached to existing DLS instruments. The polarizing components (input polarizer, output polarizer, and quarter-wave plate) are integrated into this separate carrier rather than being built into the main instrument, allowing the measurement capability to be segmented and added without complicating the core system.
Solution Approach 2:
The cuvette carrier acts as an intermediary component between the existing DLS instrument and the sample. It introduces the necessary polarizing optics into the light path without requiring modification of the instrument itself. The carrier mediates the interaction between the laser beam and the sample by controlling the polarization state of both incident and scattered light.
2Adaptability or versatility
If the system is upgraded or replaced to perform DDLS measurements, then measurement capability is improved, but the cost increases significantly
Solution Approach 1:
The cuvette carrier is designed to be universally compatible with existing DLS instruments, allowing a single low-cost add-on component to enable DDLS measurements across multiple instrument platforms. The same carrier can be used with different DLS instruments without requiring instrument-specific modifications, maximizing the cost-effectiveness of the polarization detection capability.
Solution Approach 2:
Rather than investing in expensive, permanent system upgrades, the invention uses a relatively inexpensive, easily replaceable cuvette carrier that contains all necessary polarizing components. This disposable-like approach to adding functionality reduces the financial barrier to entering DDLS measurements.
3Measurement precision
If standard DLS measurement is performed without polarization detection, then the measurement process is simple and fast, but the accuracy and precision of particle size distribution analysis for anisotropic particles is limited
Solution Approach 1:
The input polarizer and quarter-wave plate are positioned to pre-condition the laser beam before it enters the sample. This preliminary polarization control ensures that the incident light has the correct polarization state (linear or circular) for accurate DDLS measurements, eliminating the need for complex post-measurement analysis or recalibration.
Solution Approach 2:
The output polarizer enables detection of the polarization state of scattered light, providing feedback information about the anisotropy of particles. This feedback mechanism allows the system to accurately distinguish between different particle shapes and orientations by analyzing how they modify the polarization of scattered light.
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 retrofitting of existing DLS systems to perform DDLS measurements, improving the accuracy and precision of particle size distribution analysis by detecting polarized light components, thus overcoming the limitations of standard DLS instruments.
Implementation Method 1
a first optical polariser arranged to polarise light passing through the first transmissive region
Implementation Method 2
a second optical polariser arranged to polarise light passing through the second transmissive region
Implementation Method 3
Light scattered from the particles along a particular direction is detected in a plane orthogonal to the polarisation of the incoming light
Data Source
AI summary
A cuvette carrier comprising: a plurality of walls defining a holding volume for a cuvette; a first and second transmissive region included in the plurality of walls; and a first optical polariser arranged to polarise light passing through the first transmissive region.