Three-dimensional quantitative phase measurement by Common-path Digital Holographic Microscopy

Common-path Digital Holographic Microscopy (CP-DHM) is a new technique which can physically compensate the phase curvature introduced by the microscope objective. We designed a compact CP-DHM system for quantitative phase measurement of transparant microscopic samples. The system incorporates a special fiber-connected condenser system which makes adjustment easy when using different microscope objectives. We present the results for the system calibration and analysis of a micro-lens array to demonstrate the performance of the system.