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(a-c) Schematic diagram and photograph of our lensfree off-axis reflection holographic microscope are shown (LD: laser diode, PH: pin-hole, BC: beam-cube). The LD and the CMOS sensor chip are powered by two AA batteries and a USB connection, respectively. The inset image in (c) shows the field-portable microscope with its cover. This entire assembly, including the batteries, weighs ~200 g with dimensions of 15 x 5.5 x 5 cm.
