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(a) Schematic diagram and (b) photograph of our lensless in-line transmission mode holographic microscope are shown. The inset image in (b) shows the field-portable microscope with its cover. The PH-to-sample distance is ~25 mm and the sample-to-sensor distance is ≤1 mm, such that the entire 24 mm2 active area of the CMOS sensor becomes the sample FOV.
