Imaging micrometer-sized aerosol particles with digital holography
Matthew J. Berg, Justin Jacquot, Jeremy M. Harris, Xiaoli Shen
Abstract
Small particles that are trapped, deposited, or otherwise fixed can be imaged by digital holography with a resolution approaching that of optical microscopy. When such particles are in motion as an aerosol, a comparable resolution is challenging to achieve. Using a simplified bi-telecentric lens system, we demonstrate that 1µm free-flowing aerosol particles can be imaged at the single-particle level using digital in-line holography. The imaging is demonstrated with an aerosol of 1µm polystyrene latex microspheres and a ragweed pollen aerosol.
Topics & Concepts
AerosolDigital holographyOpticsHolographyMaterials scienceParticle (ecology)MicroscopyDigital holographic microscopyMicrometerPhysicsGeologyMeteorologyOceanographyDigital Holography and MicroscopyMicrofluidic and Bio-sensing TechnologiesOrbital Angular Momentum in Optics