Sneezing and Coughing
Many researchers continue to look for innovative ways to visualize gases, bioaerosols & droplets to better understand (and quite frankly) prove how viruses spread throughout our communities. This is a hot topic & international discussion.
I usually refer people to the work of Prof. Lydia Bourouiba, of MIT, who published some really nice work in the past years using a unique imaging strategy to look at such droplet & bioaerosol emissions. You can check it out here: https://lnkd.in/dtFceqQ
Inspired by her work, I just put together a similar setup & have been doing some close-up tests on masks.
My Disclaimer. With this particular setup, due to lensing, results are resolution limited. Therefore, the smallest populations of droplets & aerosols within the mask & non-mask videos cannot be seen. The purpose of my post is to demonstrate that this setup is an great platform for characterizing droplet trajectory, and to inspire future research. Characterization of the smaller populations of droplets is doable, demanding higher mag optics.
Educate, research, enjoy
Details:
This is a shot where I used Dark Field Imaging For Droplet & Aerosol Characterization. Setup was a v2640 monochrome camera with a 100 mm Ziess at 6100 fps f/2 exp=3us and a IES 4432 LED Panel placed behind the subject at roughly a 45 degree angle. I tested a one-time use surgical mask and a KN95 mask.