Real-time digital holographic microscopy based on parallel calculation
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1.
Ningbo Yongxin Optics Co. Ltd., Ningbo 315040, China;
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2.
Department of Optical Engineering, Zhejiang University, Hangzhou 310017, China;
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3.
Institute of Information Optics, Zhejiang Normal University, Jinhua 321004, China
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Received Date:
2014-06-12
Accepted Date:
2014-07-04
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Abstract
For real-time measurement of digital holographic microscopy (DHM), a parallel algorithm was proposed. Firstly, real-time recording strategy was adopted to record hologram, intensity of object wave and intensity of reference wave according to light path of DHM. Zero-order of hologram was removed by this strategy. So, the product of spatial band-width of image sensor was efficiently utilized. Then, parallel reconstructing software was developed. The captured image was separated to four partitions and was sent to four procedures which run simultaneously. After the partitions were reconstructed by the corresponding procedure, each reconstructed result was separated to four regions. The corresponding regions were combined to four groups and were sent to four procedures for superposing and calculating phase and intensity. Finally, the whole phase and intensity map were obtained by merging four regions of phase and intensity. The experimental results reveal that the speed for image capture and hologram reconstruction is up to 18frame/s. Real-time measurement is realized with the proposed system.
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