Fourier transform moiré tomography for high-sensitivity mapping asymmetric 3-D temperature field

Fourier transform evaluation for moire deflectogram is proposed to automatically map the temperature field. The moire deflectogram is generated by conventional deflectometer and is analyzed by means of Fourier transform algorithm. The convolution backprojection algorithm is used for the optical tomography. Asymmetric 3-D gas temperature distribution for a given layer is reconstructed.

[1]  W. Merzkirch,et al.  Optical tomography applied to speckle photographic measurement of asymmetric flows with variable density , 1988 .

[2]  I. Vlad,et al.  Computer moire deflectometry using the Talbot effect , 1991 .

[3]  J A Quiroga,et al.  Automatic processing in moiré deflectometry by local fringe direction calculation. , 1998, Applied optics.

[4]  Tilo Pfeifer,et al.  Phase-shifting Moiré deflectometry , 1995 .

[5]  Juan Antonio Quiroga,et al.  FOURIER TRANSFORM METHOD FOR AUTOMATIC PROCESSING OF MOIRE DEFLECTOGRAMS , 1999 .

[6]  Edward B. Temple.  Quantitative Measurement of Gas Density by Means of Light Interference in a Schlieren System , 1957 .

[7]  O. Kafri,et al.  Refractive-index measurements by moire deflectometry. , 1982, Applied optics.

[8]  Wen Jei Yang,et al.  Handbook of Flow Visualization , 2001 .

[9]  Ming Wang.  Projection moire deflectometry for the automatic measurement of phase objects , 1996 .

[10]  Jingang Zhong,et al.  Fourier transform moire deflectometry , 1998, Optics & Photonics.

[11]  R Rodriguez-Vera,et al.  Automatic fringe detection algorithm used for moire deflectometry. , 1990, Applied optics.

[12]  K Murata,et al.  Measurements of phase objects using the Talbot effect and moire techniques. , 1984, Applied optics.

[13]  M. Takeda,et al.  Fourier transform profilometry for the automatic measurement of 3-D object shapes. , 1983, Applied optics.

[14]  O. Kafri,et al.  Noncoherent method for mapping phase objects. , 1980, Optics letters.