Four-map absolute distance contouring

A new method called four-map absolute distance contouring, based on the shadow moiretechnique, is described. In this system, the period of a sinusoidal grating is varied through its rotation, with the effect that the phase of the moirepattern is also changed. By selecting suitable rotation angles, four images at different grating positions are acquired, from which the absolute distance from the object to the grating can be determined. The theoretical analysis is presented for the method, which has been verified by suitable laboratory experimentation. The measur- able range is directly proportional to the period of the grating and in- versely proportional to the angles through which the grating is rotated. The results show that the method is fast and accurate. © 1997 Society of Photo-Optical Instrumentation Engineers. (S0091-3286(97)01809-6)

[1]  T Tschudi,et al.  Moiré depth contouring. , 1979, Applied optics.

[2]  K. J. Gȧsvik,et al.  Moiré technique in 3-D machine vision , 1989 .

[3]  H Singh,et al.  Direct extraction of phase gradients from Fourier-transform and phase-step fringe patterns. , 1994, Applied optics.

[4]  Luciano Pirodda,et al.  Shadow And Projection Moire Techniques For Absolute Or Relative Mapping Of Surface Shapes , 1982 .

[5]  P. Meyrueis,et al.  Three-Dimensional Automated Pattern Recognition Using The Moire Techniques , 1983, Optics & Photonics.

[6]  M. Adachi,et al.  Moire topography for three-dimensional profile measurement using the interference fringes of a laser , 1992 .

[7]  T Yatagai,et al.  Scanning moiré method and automatic measurement of 3-D shapes. , 1977, Applied optics.

[8]  S. Toyooka,et al.  Automatic profilometry of 3-D diffuse objects by spatial phase detection. , 1986, Applied optics.

[9]  V. Srinivasan,et al.  Automated phase-measuring profilometry of 3-D diffuse objects. , 1984, Applied optics.

[10]  Shunsuke Yokozeki,et al.  Fringe-scanning method using a general function for shadow moiré. , 1995, Applied optics.

[11]  M. J. Lalor,et al.  A Novel Approach To Optical Range Finding , 1987, Other Conferences.

[12]  H E Cline,et al.  Automatic moire contouring. , 1984, Applied optics.

[13]  G Häusler,et al.  Acquisition of 3-D data by focus sensing. , 1988, Applied optics.

[14]  Toru Yoshizawa,et al.  Shadow moiré topography by means of the phase-shift method , 1993 .

[15]  Guan-chang Jin,et al.  Automated Moire Contouring Of Diffuse Surfaces , 1989 .

[16]  Maurice Halioua,et al.  Projection moire with moving gratings for automated 3-D topography. , 1983, Applied optics.

[17]  W F Decraemer,et al.  Phase shift method based on object translation for full field automatic 3-D surface reconstruction from moire topograms. , 1988, Applied optics.

[18]  A. Lagarde,et al.  Three-dimensional shape reconstruction by phase-shifting shadow moire. , 1994, Applied optics.

[19]  G. T. Reid,et al.  Absolute and comparative measurements of three-dimensional shape by phase measuring moiré topography , 1984 .

[20]  J. F. Cardenas-Garcia,et al.  Implementation and use of an automated projection Moiré experimental set-up , 1994 .

[21]  G. T. Reid,et al.  Automatic on-line measurements of three-dimensional shape by shadow casting moiré topography , 1986 .

[22]  G. Häusler,et al.  Simple, robust and accurate phase-measuring triangulation , 1992 .