Abstract

Modifications to a Zeiss fundus camera to enable production of holograms of selected sites of an optic fundus are described. Resolution near the resolution limit of the camera has been obtained in holograms of the fundi of anaesthetized cats. Laser intensities on the retina are below injury levels.

© 1972 Optical Society of America

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References

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  1. R. F. Van Ligten, B. Grolman, K. Lawton, Am. J. Optom. Arch. Optom. 43, 351 (1966).
  2. J. L. Calkins, C. D. Leonard, Invest. Ophthal. 9, 458 (1970).
    [PubMed]
  3. H. Littmann, Die Zeiss Funduskamera Ber. 59. Zusammenkunft Deutsch. Ophthalmolog. Gesellsch., Heidelberg 1955 (Verlag Bergmann, Munchen), p. 318.
  4. D. Schultze, Laser Focus 4, 23 (1968).
  5. A. Vassiliadis, H. C. Zweng, N. A. Zweng, R. C. Honey, “Laser Ocular Damage Thresholds,” Stanford Research Institute, Menlo Park, California (March1969).
  6. Threshold Limit Values for Physical Agents, American Council of Government Industrial Hygienists, Cincinnati (1968), Suppl. 7; Laser Focus, 4, 50 (1968).
  7. R. L. Wiggins, K. D. Vaughan, G. B. Friedmann, Arch. Ophthalmol (in press).
  8. L. Toth, S. A. Collins, Appl. Phys. Lett. 13, 7 (1968).
    [CrossRef]
  9. H. Ohzu, in Applications of Holography, E. S. Barrekette, W. E. Kock, T. Ose, J. Tsujiuchi, G. W. Stroke, Eds. (Plenum, New York, 1971), pp. 365–376.
    [CrossRef]

1970 (1)

J. L. Calkins, C. D. Leonard, Invest. Ophthal. 9, 458 (1970).
[PubMed]

1968 (2)

D. Schultze, Laser Focus 4, 23 (1968).

L. Toth, S. A. Collins, Appl. Phys. Lett. 13, 7 (1968).
[CrossRef]

1966 (1)

R. F. Van Ligten, B. Grolman, K. Lawton, Am. J. Optom. Arch. Optom. 43, 351 (1966).

Calkins, J. L.

J. L. Calkins, C. D. Leonard, Invest. Ophthal. 9, 458 (1970).
[PubMed]

Collins, S. A.

L. Toth, S. A. Collins, Appl. Phys. Lett. 13, 7 (1968).
[CrossRef]

Friedmann, G. B.

R. L. Wiggins, K. D. Vaughan, G. B. Friedmann, Arch. Ophthalmol (in press).

Grolman, B.

R. F. Van Ligten, B. Grolman, K. Lawton, Am. J. Optom. Arch. Optom. 43, 351 (1966).

Honey, R. C.

A. Vassiliadis, H. C. Zweng, N. A. Zweng, R. C. Honey, “Laser Ocular Damage Thresholds,” Stanford Research Institute, Menlo Park, California (March1969).

Lawton, K.

R. F. Van Ligten, B. Grolman, K. Lawton, Am. J. Optom. Arch. Optom. 43, 351 (1966).

Leonard, C. D.

J. L. Calkins, C. D. Leonard, Invest. Ophthal. 9, 458 (1970).
[PubMed]

Littmann, H.

H. Littmann, Die Zeiss Funduskamera Ber. 59. Zusammenkunft Deutsch. Ophthalmolog. Gesellsch., Heidelberg 1955 (Verlag Bergmann, Munchen), p. 318.

Ohzu, H.

H. Ohzu, in Applications of Holography, E. S. Barrekette, W. E. Kock, T. Ose, J. Tsujiuchi, G. W. Stroke, Eds. (Plenum, New York, 1971), pp. 365–376.
[CrossRef]

Schultze, D.

D. Schultze, Laser Focus 4, 23 (1968).

Toth, L.

L. Toth, S. A. Collins, Appl. Phys. Lett. 13, 7 (1968).
[CrossRef]

Van Ligten, R. F.

R. F. Van Ligten, B. Grolman, K. Lawton, Am. J. Optom. Arch. Optom. 43, 351 (1966).

Vassiliadis, A.

A. Vassiliadis, H. C. Zweng, N. A. Zweng, R. C. Honey, “Laser Ocular Damage Thresholds,” Stanford Research Institute, Menlo Park, California (March1969).

Vaughan, K. D.

R. L. Wiggins, K. D. Vaughan, G. B. Friedmann, Arch. Ophthalmol (in press).

Wiggins, R. L.

R. L. Wiggins, K. D. Vaughan, G. B. Friedmann, Arch. Ophthalmol (in press).

Zweng, H. C.

A. Vassiliadis, H. C. Zweng, N. A. Zweng, R. C. Honey, “Laser Ocular Damage Thresholds,” Stanford Research Institute, Menlo Park, California (March1969).

Zweng, N. A.

A. Vassiliadis, H. C. Zweng, N. A. Zweng, R. C. Honey, “Laser Ocular Damage Thresholds,” Stanford Research Institute, Menlo Park, California (March1969).

Am. J. Optom. Arch. Optom. (1)

R. F. Van Ligten, B. Grolman, K. Lawton, Am. J. Optom. Arch. Optom. 43, 351 (1966).

Appl. Phys. Lett. (1)

L. Toth, S. A. Collins, Appl. Phys. Lett. 13, 7 (1968).
[CrossRef]

Invest. Ophthal. (1)

J. L. Calkins, C. D. Leonard, Invest. Ophthal. 9, 458 (1970).
[PubMed]

Laser Focus (1)

D. Schultze, Laser Focus 4, 23 (1968).

Other (5)

A. Vassiliadis, H. C. Zweng, N. A. Zweng, R. C. Honey, “Laser Ocular Damage Thresholds,” Stanford Research Institute, Menlo Park, California (March1969).

Threshold Limit Values for Physical Agents, American Council of Government Industrial Hygienists, Cincinnati (1968), Suppl. 7; Laser Focus, 4, 50 (1968).

R. L. Wiggins, K. D. Vaughan, G. B. Friedmann, Arch. Ophthalmol (in press).

H. Littmann, Die Zeiss Funduskamera Ber. 59. Zusammenkunft Deutsch. Ophthalmolog. Gesellsch., Heidelberg 1955 (Verlag Bergmann, Munchen), p. 318.

H. Ohzu, in Applications of Holography, E. S. Barrekette, W. E. Kock, T. Ose, J. Tsujiuchi, G. W. Stroke, Eds. (Plenum, New York, 1971), pp. 365–376.
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Schematic diagram of unmodified Zeiss fundus camera. X = xenon flash bulb, P = glass plate, W = double filament bulb, C = compensator for astigmatism, R = eyepiece reticule, M1, M2, M3, M4 = mirrors, L1 condensor lens system, L2 = lens and field diaphragm, L3 to L8 = camera lens components, F = photographic emulsion plane, CA = camera housing. Rays shown represent light incident on the eye (---) and reflected from the eye (—).

Fig. 2
Fig. 2

Schematic diagram of the modified Zeiss fundus camera. SF = spatial filter, CL = collimating lens, VBS = variable beam splitter, LA, LB, LD = lenses, ME = mirror, HP = hologram plate. All other components are as in Fig. 1. Rays shown represent laser light incident (---) on and reflected (—) from the eye.

Fig. 3
Fig. 3

Schematic diagram of the construction reference beam geometry. MA, MB, MC, MD, and ME = reference beam mirrors for construction, LC = lens. All other components are as in Fig. 2. Rays shown represent construction reference beam.

Fig. 4
Fig. 4

Photograph of reconstructed hologram of a cat fundus taken with a 2-W cw argon ion laser.

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