Abstract

A method for deformation analysis and shape measurement based on digital holography is presented. Two wavelengths, 694 and 347 nm, are used. The object is illuminated with the two wavelengths at the same time, and digital holograms are recorded on a CCD chip. The information corresponding to the two wavelengths is separated in the Fourier domain, and the phase corresponding to the wave fronts is calculated. By recording holograms with two different wavelengths at the same time, we can get measurements of deformations or shape with different sensitivities. Experimental results are presented.

© 2000 Optical Society of America

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References

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  1. C. M. Vest, Holographic Interferometry (Wiley, New York, 1979).
  2. R. Jones, C. Wykes, Holographic and Speckle Interferometry, 2nd. ed., Volume 6 of Cambridge Studies in Modern Optics Series (Cambridge U. Press, Cambridge, UK, 1989).
  3. G. Pedrini, H. Tiziani, Y. Zou, “Digital double pulse-TV-holography,” Opt. Lasers Eng. 26, 199–219 (1997).
    [CrossRef]
  4. G. Pedrini, Ph. Fröning, H. J. Tiziani, M. E. Gusev, “Pulsed digital holography for high-speed contouring that uses a two-wavelength method,” Appl. Opt. 38, 3460–3467 (1999).
    [CrossRef]
  5. W. T. Cathey, Optical Information Processing and Holography (Wiley, New York, 1974), Chap. 9, pp. 256–313.

1999 (1)

1997 (1)

G. Pedrini, H. Tiziani, Y. Zou, “Digital double pulse-TV-holography,” Opt. Lasers Eng. 26, 199–219 (1997).
[CrossRef]

Cathey, W. T.

W. T. Cathey, Optical Information Processing and Holography (Wiley, New York, 1974), Chap. 9, pp. 256–313.

Fröning, Ph.

Gusev, M. E.

Jones, R.

R. Jones, C. Wykes, Holographic and Speckle Interferometry, 2nd. ed., Volume 6 of Cambridge Studies in Modern Optics Series (Cambridge U. Press, Cambridge, UK, 1989).

Pedrini, G.

Tiziani, H.

G. Pedrini, H. Tiziani, Y. Zou, “Digital double pulse-TV-holography,” Opt. Lasers Eng. 26, 199–219 (1997).
[CrossRef]

Tiziani, H. J.

Vest, C. M.

C. M. Vest, Holographic Interferometry (Wiley, New York, 1979).

Wykes, C.

R. Jones, C. Wykes, Holographic and Speckle Interferometry, 2nd. ed., Volume 6 of Cambridge Studies in Modern Optics Series (Cambridge U. Press, Cambridge, UK, 1989).

Zou, Y.

G. Pedrini, H. Tiziani, Y. Zou, “Digital double pulse-TV-holography,” Opt. Lasers Eng. 26, 199–219 (1997).
[CrossRef]

Appl. Opt. (1)

Opt. Lasers Eng. (1)

G. Pedrini, H. Tiziani, Y. Zou, “Digital double pulse-TV-holography,” Opt. Lasers Eng. 26, 199–219 (1997).
[CrossRef]

Other (3)

W. T. Cathey, Optical Information Processing and Holography (Wiley, New York, 1974), Chap. 9, pp. 256–313.

C. M. Vest, Holographic Interferometry (Wiley, New York, 1979).

R. Jones, C. Wykes, Holographic and Speckle Interferometry, 2nd. ed., Volume 6 of Cambridge Studies in Modern Optics Series (Cambridge U. Press, Cambridge, UK, 1989).

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Figures (4)

Fig. 1
Fig. 1

Setup for digital holographic holography with two wavelengths (red and UV). BBO, β-barium borate; AP, aperture; L, lens; M, mirror.

Fig. 2
Fig. 2

Digital reconstructed image of the aperture from two holograms recorded with red and UV light.

Fig. 3
Fig. 3

Plate vibrating with a frequency of 957 Hz. (a) Measurement with red light at 694 nm. (b) Measurement with UV light at 347 nm.

Fig. 4
Fig. 4

Shape measurement of small corner. (a) Red light, contour interval 7.1 mm. (b) UV light, contour interval 3.5 mm.

Equations (1)

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