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Three-Dimensional Information and Two-Dimensional Refractive Index Measurements Using a Combined Digital Holographic Microscope Hyungjun Cho, Jingwoong Lim, Doocheol Kim and Younghun Yu Department of Physics, Cheju National University, Jeju 690-756 Sanghoon Shin AP & Tec, Seoul 135-539 Wongun Jang Micro-Optics Team, Korea Optical Photonics Technology Institute, Gwangju 500-460 (Received 12 December 2007, in nal form 10 March 2008) We developed a combined digital holographic microscope that can measure the refractive index of a sample. This system provides highly precise three-dimensional (3-D) information on the sample. We also propose theoretical and experimental methods for the combined holography microscope. The measured data were reasonable although the data error was large. This error was attributable to alignment issues in the experiment. By improving the experimental method, we can measure the refractive index more precisely and obtain more accurate 3-D information on the samples. PACS numbers: 42.40.My, 42.30.W, 42.25.F |
