中国物理B ›› 2009, Vol. 18 ›› Issue (1): 189-194.doi: 10.1088/1674-1056/18/1/030

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

The recording of digital hologram at short distance and reconstruction using convolution approach

陈利平, 吕晓旭   

  1. Laboratory of Photonic Information Technology, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
  • 收稿日期:2008-02-07 修回日期:2008-05-21 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60747001 and 60467003).

The recording of digital hologram at short distance and reconstruction using convolution approach

Chen Li-Ping(陈利平)† and Lü Xiao-Xu(吕晓旭)‡   

  1. Laboratory of Photonic Information Technology, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
  • Received:2008-02-07 Revised:2008-05-21 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60747001 and 60467003).

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摘要： By adopting in-line lensless Fourier setup and phase-shifting technique, we recorded the phase-shifting digital hologram at short distance. As the Fresnel diffraction condition is no longer valid, the convolution approach is chosen for the reconstruction. However, the simulated reference wave for the reconstruction would suffer from severe under-sampling due to the comparatively large pixel size. To solve this problem, sinc-interpolation is introduced to get the pixel-size of the hologram reduced prior to the reconstruction. The experimental results show that an object image of high fidelity is obtained with this method.

Abstract: By adopting in-line lensless Fourier setup and phase-shifting technique, we recorded the phase-shifting digital hologram at short distance. As the Fresnel diffraction condition is no longer valid, the convolution approach is chosen for the reconstruction. However, the simulated reference wave for the reconstruction would suffer from severe under-sampling due to the comparatively large pixel size. To solve this problem, sinc-interpolation is introduced to get the pixel-size of the hologram reduced prior to the reconstruction. The experimental results show that an object image of high fidelity is obtained with this method.

Key words: short-distance digital holography, convolution algorithm, sinc-interpolation

中图分类号:  (Hologram recording and readout methods)

  • 42.40.Ht
02.60.Ed (Interpolation; curve fitting)