Optical particle-sizing method that provides optical isolation of the sampling volume

Area of Science:

• Environmental Science
• Atmospheric Science
• Instrumentation

Background:

• Current atmospheric dust particle sizers predominantly use ensemble-diffraction methods.
• These methods often rely on mechanical devices, which can be intrusive for certain measurements.
• There is a need for non-obtrusive particle sizing techniques in atmospheric monitoring.

Purpose of the Study:

• To develop and evaluate a novel particle sizer for atmospheric dust.
• To introduce a particle counting (time-domain) approach as an alternative to ensemble-diffraction.
• To enable non-intrusive atmospheric dust measurements.

Main Methods:

• Construction and testing of a new particle sizing instrument.
• Implementation of a time-domain particle counting technique.
• Utilizing optical isolation for defining the sampling volume, avoiding mechanical constraints.

Main Results:

• The novel particle sizer was successfully constructed and tested.
• The time-domain approach demonstrated effective particle counting.
• Optical isolation proved feasible for defining the sampling volume.

Conclusions:

• The developed particle sizer offers a viable alternative to existing market technologies.
• The time-domain approach with optical isolation is suitable for non-obtrusive atmospheric dust measurements.
• This technique advances the field of atmospheric particle analysis.