AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
Abstract View
Orthographic Imaging of Free-Flowing Aerosol Particles
JESSE LANING, Matthew Berg, Kansas State University
Abstract Number: 849 Working Group: Instrumentation and Methods
Abstract A method to obtain contact-free images of aerosol particles with digital holography from three orthogonal directions without lenses. The approach uses three diode lasers of different wavelengths to simultaneously illuminate flowing particles and form holograms on three sensors. Images of the particles are then reconstructed from the holograms and used to infer the three-dimensional structure of the particles. The apparatus employs inexpensive components and requires no lenses to achieve the imaging, giving it a large sensing volume and simple design. Test cases are presented with spherical glass particles and nonspherical pollen particles. The next step for this work is to test more formal techniques, such as weighted back-projection, to better render the 3D form of the particles.