Fig. 6
From: A framework for real-time image detection of bioaerosols

Isolated images of pure riboflavin particles illuminated with a 375-nm, 300-mW laser with and without a UV-IR cut filter (Gzikai) applied in line with the image sensor. The images are of an unknown size and concentration of particles generated through nebulization. The images were captured after stagnating the particle flow. Note that the image is cropped to focus on the illuminated area. The UV-IR cut filter has a reported transmission of 93% at a wavelength of 415Â nm.