Abstract

Holograms and high-quality reconstructions have been made by using a two-beam interferometric technique. The extraneous twin image and other interfering terms have been eliminated. Two types of objects have been used which are not suitable for the conventional wavefront reconstruction technique: objects which do not transmit a strong background wave (e.g., transparent lettering against a dark background) and continuous-tone objects.

© 1963 Optical Society of America

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References

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  1. D. Gabor, Nature 161, 777 (1948); Proc. Roy. Soc. (London) A197, 454 (1949).
    [Crossref]
  2. E. Leith and J. Upatnieks, J. Opt. Soc. Am. 52, 1123 (1962).
    [Crossref]
  3. A. Ingalls, Phot. Sci. Eng. 4, 135 (1960).

1962 (1)

1960 (1)

A. Ingalls, Phot. Sci. Eng. 4, 135 (1960).

1948 (1)

D. Gabor, Nature 161, 777 (1948); Proc. Roy. Soc. (London) A197, 454 (1949).
[Crossref]

Gabor, D.

D. Gabor, Nature 161, 777 (1948); Proc. Roy. Soc. (London) A197, 454 (1949).
[Crossref]

Ingalls, A.

A. Ingalls, Phot. Sci. Eng. 4, 135 (1960).

Leith, E.

Upatnieks, J.

J. Opt. Soc. Am. (1)

Nature (1)

D. Gabor, Nature 161, 777 (1948); Proc. Roy. Soc. (London) A197, 454 (1949).
[Crossref]

Phot. Sci. Eng. (1)

A. Ingalls, Phot. Sci. Eng. 4, 135 (1960).

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Figures (5)

Fig. 1
Fig. 1

Wedge technique for producing a two-beam hologram. The object is placed in the lower part of plane P1; the hologram is recorded at plane P2.

Fig. 2
Fig. 2

The reconstruction process. Low-quality conventional reconstructions occur on hologram axis. High-quality reconstructions occur in the first-order diffracted waves.

Fig. 3
Fig. 3

Hologram and reconstruction of transparent lettering on dark background. (a) Hologram; (b) reconstruction; (c) original object. The original object was about 1.5 cm in length; the distance between objects and hologram planes was about 2 ft. The hologram was made with Kodak Spectroscopic Plates, Type 649-F.

Fig. 4
Fig. 4

Hologram and reconstruction of a scene. The object was about 1.5 cm in height, and the distance between object and hologram was about 4 ft. The hologram was made with Kodak High Contrast Copy.

Fig. 5
Fig. 5

Hologram and reconstruction of a portrait. The object was about 1.5 cm square and the distance between object and hologram was about 2.5 ft. The hologram was made with Kodak Spectroscopic Plate, Type 649-F.

Equations (4)

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U ( x , y ) = A ( x , y ) e i ϕ ( x , y ) ,
T = T 0 - k I ,
I = A 0 e i ξ c x + A e i ϕ 2 ,
T = T 0 - k A 0 e i ξ c x + A e i ϕ 2 = T 0 - k A 0 2 - k A 2 - 2 k A 0 A cos ( ξ c x - ϕ ) .