Abstract

Digital holography replaces the permanent recording material of analog holography with an electronic light sensitive matrix detector, but besides the many unique advantages, this brings serious limitations with it as well. The limited resolution of matrix detectors restricts the field of view, and their limited size restricts the resolution in the reconstructed holographic image. Scanning the larger aerial hologram (the interference light field of the object and reference waves in the hologram plane) with the small matrix detector or using magnification for the coarse matrix detector at the readout of the fine-structured aerial hologram, these are straightforward solutions but have been exploited only partially until now. We have systematically applied both of these approaches and have driven them to their present extremes, over half a magnitude in extensions.

© 2009 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  7. U. Schnars and W. Jüptner, Digital Holography (Springer, 2005).

2008 (2)

2002 (3)

2001 (1)

Adams, M.

T. Kreis, M. Adams, and W. Jüptner, “Aperture synthesis in digital holography,” Proc. SPIE 4777, 69-76 (2002).
[CrossRef]

Binet, R.

Colineau, J.

Collot, L.

Gross, M.

Javidi, B.

Jüptner, W.

T. Kreis, M. Adams, and W. Jüptner, “Aperture synthesis in digital holography,” Proc. SPIE 4777, 69-76 (2002).
[CrossRef]

U. Schnars and W. Jüptner, Digital Holography (Springer, 2005).

Kreis, T.

T. Kreis, M. Adams, and W. Jüptner, “Aperture synthesis in digital holography,” Proc. SPIE 4777, 69-76 (2002).
[CrossRef]

Le Clerc, F.

Lehureau, J.-C.

Martínez-León, L.

Massig, J.

Matsushima, K.

Nakatsuji, T.

Schnars, U.

U. Schnars and W. Jüptner, Digital Holography (Springer, 2005).

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Figures (6)

Fig. 1
Fig. 1

Digital holographic reconstruction showing resolution and field of view (a) reconstructing directly with the original aperture of the optics-free digital camera, (b) reconstructing by scanning with the original aperture of the optics-free digital camera, and (c) reconstructing with the demagnified aperture of the microscope objective mounted on a digital camera, by scanning up to the original aperture size (and higher).

Fig. 2
Fig. 2

Stitching the hologram parts in different ways.

Fig. 3
Fig. 3

Recording and reconstruction/observation arrangements: (a) recording with two versions of digital cameras, and with a holographic plate, (b) reconstructing and observing a real image from a holographic plate, (c) reconstructing and observing a virtual image from a holographic plate, and (d) observing a real object directly by the lens system.

Fig. 4
Fig. 4

Results of scanning the aerial hologram, and the comparison of the achievement of digital holography with material holography and with direct imaging by a lens.

Fig. 5
Fig. 5

Result of magnifying the aerial hologram by a factor of 4 and the results of the combination of this magnification with scanning.

Fig. 6
Fig. 6

Result of magnifying the aerial hologram by a factor of 10 and the results of the combination of this magnification with scanning.

Equations (5)

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Δ x ˜ = λ d L x , Δ y ˜ = λ d L y .
L x ( DFT ) = 4 L x , L y ( DFT ) = 4 L y ,
Δ x ˜ ( DFT ) = λ d L x ( DFT ) = λ d 4 L x , Δ y ˜ ( DFT ) = λ d L y ( DFT ) = λ d 4 L y .
L ˜ x ˜ ( DFT ) = λ d Δ x , L ˜ y ˜ ( DFT ) = λ d Δ y ,
L ˜ x ˜ ( DFT , hom ) = λ d 4 Δ x , L ˜ y ˜ ( DFT , hom ) = λ d 4 Δ y ,

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