Real-time analysis of isochromatics and isoclinics using the phase-shifting method

This paper studies a new real-time phase-shifting method for the analysis of isochromatic and isoclinic parameters in photoelasticity. By rotating an analyzer at a constant rate and an output quarter-wave plate at a double rate of the analyzer and recording images by a CCD camera continuously, sequential images which brightness is integrated by sensors in a CCD camera during phase-shifting are obtained. Then, the distributions of the isochromatic and isoclinic parameters are obtained immediately and quantitatively using the proposed phase-shifting algorithm. The proposed method can be applied to high-speed inspection of optical elements or glass products. Also, it is expected that slowly varying time-dependent problems can be analyzed by the proposed method.

[1]  Pericles S. Theocaris,et al.  Matrix Theory of Photoelasticity , 1979 .

[2]  Motoharu Fujigaki,et al.  Real-time shape measurement by integrated phase-shifting method , 1999, Other Conferences.

[3]  Anand Asundi,et al.  Full field automated photoelasticity using two- load-step method , 2001 .

[4]  David P. Towers,et al.  New approaches to the full-field analysis of photoelastic stress patterns , 1996 .

[5]  K. T. Ramesh,et al.  Phase-shifting methodologies in photoelastic analysis—the application of Jones calculus , 1996 .

[6]  A. D. Nurse,et al.  Absolute determination of the isochromatic parameter by loadstepping photoelasticity , 1998 .

[7]  Anand Asundi,et al.  Phase shifting in photoelasticity , 1993 .

[8]  Motoharu Fujigaki,et al.  Small displacement analysis of microaccelerometer by integrated phase-shifting method , 1999, Other Conferences.

[9]  Sandro Barone,et al.  A method for reducing the influence of quarter-wave plate errors in phase stepping photoelasticity , 1998 .

[10]  F. W. Hecker,et al.  Computer-Aided Measurement of Relative Retardations in Plane Photoelasticity , 1986 .

[11]  Satoru Yoneyama,et al.  A new method for photoelastic fringe analysis from a single image using elliptically polarized white light , 1998 .

[12]  Masahisa Takashi,et al.  Photoelastic Analysis with a Single Tricolor Image , 1998 .

[13]  Toru Yoshizawa,et al.  Two-dimensional birefringence measurement using the phase shifting technique , 1994 .

[14]  Masahisa Takashi,et al.  Full-field automated photoelasticity by fourier polarimetry with three wavelengths. , 2001, Applied optics.

[15]  Eann A. Patterson,et al.  Towards full field automated photoelastic analysis of complex components , 1991 .

[16]  K. T. Ramesh,et al.  Data acquisition techniques in digital photoelasticity: a review , 1998 .

[17]  John E. Greivenkamp,et al.  Generalized Data Reduction For Heterodyne Interferometry , 1984 .

[18]  Y. Morimoto,et al.  Separation of isochromatics and isoclinics using Fourier transform , 1994 .

[19]  Eann A. Patterson,et al.  Simultaneous observation of phase-stepped images for automated photoelasticity , 1998 .

[20]  Andrew D. Nurse,et al.  Completely automated determination of two-dimensional photoelastic parameters using load stepping , 1998 .

[21]  A Asundi,et al.  Phase-shifting method with a normal polariscope. , 1999, Applied optics.

[22]  Satoru Yoneyama,et al.  Tricolor photoviscoelastic technique and its application to moving contact , 1998 .

[23]  A D Nurse.  Full-field automated photoelasticity by use of a three-wavelength approach to phase stepping. , 1997, Applied optics.

[24]  Satoru Yoneyama,et al.  Experimental analysis of rolling contact stresses in a viscoelastic strip , 2000 .

[25]  Sandro Barone,et al.  A review of automated methods for the collection and analysis of photoelastic data , 1998 .