TY - JOUR T1 - A dual-mode mobile phone microscope using the onboard camera flash and ambient light JF - bioRxiv DO - 10.1101/162008 SP - 162008 AU - A. Orth AU - E. R. Wilson AU - J. G. Thompson AU - B. C. Gibson Y1 - 2017/01/01 UR - http://biorxiv.org/content/early/2017/08/18/162008.abstract N2 - Mobile phone microscopes are a natural platform for point-of-care imaging, but current solutions require an externally powered illumination source, thereby adding bulk and cost. We present a mobile phone microscope that uses the internal flash or sunlight as the illumination source, thereby reducing complexity whilst maintaining functionality and performance. The microscope is capable of both brightfield and darkfield imaging modes, enabling microscopic visualization of samples ranging from plant to mammalian cells. We describe the microscope design principles, assembly process, and demonstrate its imaging capabilities through the visualization of unlabelled cell nuclei to observing the motility of cattle sperm. ER -