Optoelectronics Letters

, Volume 2, Issue 2, pp 136–138 | Cite as

New approach to extract phase feature of 3-D objects by wavelength-scanning digital holography

  • Shen Jin-yuan Email author
  • Li Xian-guo 
  • M. K. Kim
  • Chang Shen-jiang 
Measurement & Inspection


A new approach to extract phase feature of 3-D objects based on wavelength-scanning digital holography and numerical reconstruction technique is proposed in this paper. A number of holograms are recorded on a digital camera and reconstructed numerically by a computer with different wavelengths spaced at regular intervals. The theoretical analysis and computer simulations demonstrate that those pixels with the same phase of a 3-D object can focus on the same reconstruction plane. And those pixels with different phase of a 3-D object focus on the different reconstruction planes. Therefore the phase information of a 3-D object can be described by a series of reconstructed images on different planes.

CLC number

0438. 1 

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Copyright information

© Tianjin University of Technology 2006

Authors and Affiliations

  • Shen Jin-yuan 
    • 1
    Email author
  • Li Xian-guo 
    • 1
  • M. K. Kim
    • 2
  • Chang Shen-jiang 
    • 3
  1. 1.College of Information EngineeringZhengzhou UniversityZhengzhouChina
  2. 2.Department of PhysicsUniversity of South FloridaTampaUSA
  3. 3.Key Laboratory of Opto-electronics information Technical Science, EMC, Institute of Modern OpticsNankal UniversityTianjinChina

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