Particle Finder: Measure, Identify and Classify Particles

Measure, Identify, and Classify Particles
ParticleFinder offers a user friendly tool for the automated location, characterisation and Raman analysis of particles. Hundreds or thousands of particles can be quickly located on a video image, analyzed for size and shape descriptors, and then chemically characterised using Raman spectroscopy.
ParticleFinder is compatible with any HORIBA Raman spectrometer equipped with LabSpec 6 software, a video camera and motorized XY sample stage. With these requirements met, ParticleFinder’s Raman analysis can fully exploit the unique capabilities of HORIBA’s Raman systems to ensure the most appropriate chemical interrogation. This can range from routine identification of common particles and contaminants, through to advanced characterisation of polymorphism/phase, photoluminescence and stress/strain.

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How it works

The work flow for Particle Finder is extremely simple and intuitive. The module is an integrated part of the powerful LabSpec 6 software, and is fully linked to related modules for data acquisition, processing, analysis and display.

1. Particle location

Simple processing of the sample optical image quickly locates the particles, creating a binary image which clear highlights the particle positions. Full morphological filtering tools are included to ensure truly meaningful location. The optical image can cover any user specified area, using the integrated video montage/mosaic tool, allowing millimetre or centimetre areas to be covered.

2. Statistical analysis

Once the particles are located, particle shape and size parameters are calculated for each particle, including a statistical summary.  Histograms of the parameters (including area, perimeter, axes, ellipse ratio,  circularity and brightness) are available for easy visualization.

3. Particle selection

Initially, all located particles are set for Raman analysis.  However, they can be filtered according to the statistics results, allowing only particles which correspond to a specific size/shape to be analysed.  For example, only particles within a certain size range can be marked for Raman characterisation.

4. Raman acquisition

The full capabilities of the Raman instrument can be utilised for the Raman acquisition stage, including choice of laser wavelength, spectral resolution, confocality and mapping.  Such configurable experiments ensure that optimised results can be obtained from varying sample sets with ease. The Raman spectra are displayed in a table together with the statistical parameters.

5. Data analysis

Once the Raman data has been acquired, it is automatically linked to the individual particles in the binary image.  The spectra are now available to be processed, analysed and displayed according to the full powerful functionality of LabSpec 6.

Spectra can be exported to the HORIBA Edition KnowItAll® database searching tool for advanced spectrum matching to known materials.

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