Abstract

A new point-diffraction interferometer has been developed with a liquid-crystal filter that permits arbitrary phase shifts to be introduced between the object and reference beams. A microsphere embedded within the liquid-crystal layer provides a locally generated reference beam. We phase shift the object beam by varying a voltage across the liquid crystals, thereby altering the refractive index of the birefringent nematic liquid crystals.

© 1994 Optical Society of America

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References

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  1. V.P. Linnik, C. R. Dokl, Acad. Sci. URSS 1, 208 (1933).
  2. R. N. Smartt, W. H. Steel, Jpn. J. Appl. Phys. 14, Suppl. 14-1, 351 (1975).
  3. O. Y. Kwon, Opt. Lett. 9, 59 (1984).
    [CrossRef] [PubMed]
  4. N. Konforti, E. Marom, S.-T. Wu, Opt. Lett. 13, 251 (1988).
    [CrossRef] [PubMed]
  5. P. Hariharan, B. F. Oreb, T. Eiju, Appl. Opt. 26, 2504 (1987).
    [CrossRef] [PubMed]

1988 (1)

1987 (1)

1984 (1)

1975 (1)

R. N. Smartt, W. H. Steel, Jpn. J. Appl. Phys. 14, Suppl. 14-1, 351 (1975).

1933 (1)

V.P. Linnik, C. R. Dokl, Acad. Sci. URSS 1, 208 (1933).

Dokl, C. R.

V.P. Linnik, C. R. Dokl, Acad. Sci. URSS 1, 208 (1933).

Eiju, T.

Hariharan, P.

Konforti, N.

Kwon, O. Y.

Linnik, V.P.

V.P. Linnik, C. R. Dokl, Acad. Sci. URSS 1, 208 (1933).

Marom, E.

Oreb, B. F.

Smartt, R. N.

R. N. Smartt, W. H. Steel, Jpn. J. Appl. Phys. 14, Suppl. 14-1, 351 (1975).

Steel, W. H.

R. N. Smartt, W. H. Steel, Jpn. J. Appl. Phys. 14, Suppl. 14-1, 351 (1975).

Wu, S.-T.

Acad. Sci. URSS (1)

V.P. Linnik, C. R. Dokl, Acad. Sci. URSS 1, 208 (1933).

Appl. Opt. (1)

Jpn. J. Appl. Phys. (1)

R. N. Smartt, W. H. Steel, Jpn. J. Appl. Phys. 14, Suppl. 14-1, 351 (1975).

Opt. Lett. (2)

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Figures (2)

Fig. 1
Fig. 1

Schematic of the LCPDI.

Fig. 2
Fig. 2

Five interferograms with ϕn = −180, −90, 0, 90, and 180 deg, corresponding to n = 0, 1, 2, 3, and 4.

Equations (3)

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( x , y ) = 2 π λ [ L ( x , y ) t ] Δ n LC ,
ϕ n ( x , y ) = ( n 2 ) β + ε ( x , y ) , n = 0 , 1 , 2 , 3 , 4 .
I n ( x , y ) = I 0 n ( x , y ) × { 1 + η n ( x , y ) cos [ θ ( x , y ) + ϕ n ( x , y ) ] } ,

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