Fig. 2: Characterization of the colour compound lens.
From: Colour compound lenses for a portable fluorescence microscope
a, b Measured contact angles for the Model I camera housing with polymer volumes of 9.5 and 22.9 μL. Scale bar = 2 mm. c, d Measured contact angles for the Model II camera housing, where the polymer volume was 12.7 and 21.2 μL. Scale bar = 2 mm. Focal length as a function of the polymer and PDMS volumes for the camera housing of f Model I and e Model II, respectively. Images of the resolution target USAF-1951 with different camera magnifications captured by the camera in g–i Model I and j–l Model II housing. The right insets show the intensity profiles along the blue, red, and green lines
