Abstract

In certain applications, especially x-ray and gamma-ray photography, pinhole cameras provide one of the only methods of producing sharp images. To increase the image quality, the use of an array of multiple pinholes is found valuable. The resulting blurred image must then be decoded. A particularly direct method of decoding using the original array of pinholes is possible, providing the autocorrelation function of the array is sharply peaked. Preliminary results with representative arrays are discussed.

© 1973 Optical Society of America

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References

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  1. G. W. Stroke, paper presented at the SPIE 15th Annual Technical Symposium Anaheim, California, September 1970.
  2. G. Groh, G. S. Hyat, G. W. Stroke, Appl. Opt. 11, 931 (1972).
    [CrossRef] [PubMed]
  3. P. Bouchareine, thesis, University of Paris, 1970.
  4. M. J. E. Golay, J. Opt. Soc. Am. 61, 272 (1971).
    [CrossRef]
  5. A. Girard, Appl. Opt. 2, 79 (1963).
    [CrossRef]

1972

1971

1963

Bouchareine, P.

P. Bouchareine, thesis, University of Paris, 1970.

Girard, A.

Golay, M. J. E.

Groh, G.

Hyat, G. S.

Stroke, G. W.

G. Groh, G. S. Hyat, G. W. Stroke, Appl. Opt. 11, 931 (1972).
[CrossRef] [PubMed]

G. W. Stroke, paper presented at the SPIE 15th Annual Technical Symposium Anaheim, California, September 1970.

Appl. Opt.

J. Opt. Soc. Am.

Other

G. W. Stroke, paper presented at the SPIE 15th Annual Technical Symposium Anaheim, California, September 1970.

P. Bouchareine, thesis, University of Paris, 1970.

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Figures (3)

Fig. 1
Fig. 1

(a) Recording multiple image; (b) reconstructing. O = object, F = film, L = light, D = diffusing screen, S = screen, and C = camera.

Fig. 2
Fig. 2

Form of multiple pinhole arrays: (a) redundant, (b) nonredundant.

Fig. 3
Fig. 3

(a) Single pinhole photograph of object. (b) Sevenfold MPA photograph with nonideal array. (c) Decoded image from photograph in (b). (d) Sevenfold MPA photograph with nonredundant array. (e) Decoded image from (d).

Equations (5)

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i ( x , y ) = - o ( x , y ) p ( x - x , y - y ) d x d y ,
P ¯ ( x , y ) = - - p ( x , y ) p ( x - x , y - y ) d x d y ,
i = o * p .
i ( x , y ) = i ( x , y ) * P ( - x , - y ) = o ( x , y ) * P ( x , y ) * P ( - x , - y ) = o x , y * P ¯ ( x , y ) ,
i = o ( x , y ) + B ,

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