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Volume 26 Issue 1
Sep.  2013
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Citation:
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Holographic phase shifting technique for 3D profilometry

  • 1.

    Institute of Laser, Kunming University of Science and Technology, Kunming, 650051

  • Received Date: 2001-01-08
    Accepted Date: 2001-05-25
  • Based on holographic technique,the principle and experimental device for 3D profile measurement are introduced in the papaer.The holographic interference fringe is used instead of projected fringe.Meanwhile,phase shifting technique is used to calculate the phase of the fringe and the wrapped phase distribution of the holographic fringe is produced.Then the unwrapping process will be made by means of the height obtained based on the least square of the projected fringe.Thus,phase measurement can be obtained with higher precision.Finally,the 3D shape data can be produced according to geometric relationship between phase and the object height.
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    Dresel T,Hausler G.J Optic,1988,48 (4):215.
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    Creath K Appl Opt,1985,24 (18):3053～3058.
    [4] 于美文.光学全息及光信息处理,北京:国防工业出版社,1984:6.
    [5] 钟丽云,杨齐民,李川 et al.激光杂志,1999,20(4):31～37.
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    Strand X T C,Optical Engng,1985,24(1):33.
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Holographic phase shifting technique for 3D profilometry

  • 1. Institute of Laser, Kunming University of Science and Technology, Kunming, 650051
  • Received Date: 2001-01-08
  • Accepted Date: 2001-05-25
  • Available Online: 2002-01-25

Abstract: Based on holographic technique,the principle and experimental device for 3D profile measurement are introduced in the papaer.The holographic interference fringe is used instead of projected fringe.Meanwhile,phase shifting technique is used to calculate the phase of the fringe and the wrapped phase distribution of the holographic fringe is produced.Then the unwrapping process will be made by means of the height obtained based on the least square of the projected fringe.Thus,phase measurement can be obtained with higher precision.Finally,the 3D shape data can be produced according to geometric relationship between phase and the object height.

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