Abstract

A method of speckle reduction in holography for 2-D objects with minimum recording area is presented. The image is incoherently synthesized from the hologram double recorded with a set of random phase plates.

© 1973 Optical Society of America

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References

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  1. J. Upatnieks, Appl. Opt. 6, 1905 (1967).
    [CrossRef] [PubMed]
  2. H. J. Gerritsen, W. J. Hannan, E. G. Ramberg, Appl. Opt. 7, 2301 (1968).
    [CrossRef] [PubMed]
  3. E. N. Leith, J. Upatnieks, Appl. Opt. 7, 2085 (1968).
    [CrossRef] [PubMed]
  4. D. Gabor, IBM J. Res. Dev. Sep.509 (1970).
    [CrossRef]
  5. C. B. Burckhardt, Appl. Opt. 9, 695 (1970).
    [CrossRef] [PubMed]
  6. W. C. Stewart, A. H. Firester, E. C. Fox, Appl. Opt. 11, 604 (1972).
    [CrossRef] [PubMed]
  7. Y. Takeda, Y. Oshida, Y. Miyamura, Appl. Opt. 11, 818 (1972).
    [CrossRef] [PubMed]
  8. Y. Tsunoda, Y. Takeda, Preprint, Spring Meeting, Japan Society of Applied Physics, Tokyo (31 March 1972) (in Japanese).
  9. Y. Tsunoda, Y. Takeda, Preprint, Autumn Meeting, Japan Society of Applied Physics, Sapporo, (30 September 1972).

1972 (2)

1970 (2)

1968 (2)

1967 (1)

Burckhardt, C. B.

Firester, A. H.

Fox, E. C.

Gabor, D.

D. Gabor, IBM J. Res. Dev. Sep.509 (1970).
[CrossRef]

Gerritsen, H. J.

Hannan, W. J.

Leith, E. N.

Miyamura, Y.

Oshida, Y.

Ramberg, E. G.

Stewart, W. C.

Takeda, Y.

Y. Takeda, Y. Oshida, Y. Miyamura, Appl. Opt. 11, 818 (1972).
[CrossRef] [PubMed]

Y. Tsunoda, Y. Takeda, Preprint, Autumn Meeting, Japan Society of Applied Physics, Sapporo, (30 September 1972).

Y. Tsunoda, Y. Takeda, Preprint, Spring Meeting, Japan Society of Applied Physics, Tokyo (31 March 1972) (in Japanese).

Tsunoda, Y.

Y. Tsunoda, Y. Takeda, Preprint, Autumn Meeting, Japan Society of Applied Physics, Sapporo, (30 September 1972).

Y. Tsunoda, Y. Takeda, Preprint, Spring Meeting, Japan Society of Applied Physics, Tokyo (31 March 1972) (in Japanese).

Upatnieks, J.

Appl. Opt. (6)

IBM J. Res. Dev. Sep. (1)

D. Gabor, IBM J. Res. Dev. Sep.509 (1970).
[CrossRef]

Other (2)

Y. Tsunoda, Y. Takeda, Preprint, Spring Meeting, Japan Society of Applied Physics, Tokyo (31 March 1972) (in Japanese).

Y. Tsunoda, Y. Takeda, Preprint, Autumn Meeting, Japan Society of Applied Physics, Sapporo, (30 September 1972).

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Figures (7)

Fig. 1
Fig. 1

Portion of the amplitude mask and phase mask superposed. The total numbers of the square areas fabricated were 100 × 100.

Fig. 2
Fig. 2

A schematic diagram of the optical system for double recording the holograms. The image of the diffuser is produced on the object. The diffuser is displaced by the distance d before the second exposure.

Fig. 3
Fig. 3

Image synthesis from the double recorded hologram. The incident angles of the mutually incoherent beams S1, S2 are adjusted so that a complete image of the original object is formed.

Fig. 4
Fig. 4

The synthesized image from the double recorded hologram. The hologram was recorded on AGFA SCIENTIA PLATE 10E75. A circuilar aperture of the diameter 1.5 mm was used. The original object was a photograph of 10 mm × 10 mm.

Fig. 5
Fig. 5

Directly synthesized image through a double diffraction optical system. The numerical aperture of the imaging system was the same as that in Fig. 4. The speckle due to the errors in the mask fabrication is clearly observed, while speckle noise produced at the corners of the square patterns is far less noticeable.

Fig. 6
Fig. 6

The synthesized image from the double recorded hologram without using random phase plates. A Ronchi grating of 50 lines/mm was set in place of the diffuser in Fig. 2. The hologram was recorded at a defocused plane 15 mm behind the Fourier transform plane.

Fig. 7
Fig. 7

Reconstructed image from a conventional hologram.

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