Abstract

If the accelerating voltage is modulated, an image orthicon TV camera can be operated as a synchronous, bipolar image detector. Experimental verification of this mode of operation is presented.

© 1981 Optical Society of America

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References

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  1. P. Chavel, S. Lowenthal, J. Opt. Soc. Am. 66, 14 (1976); S. Lowenthal, P. Chavel, in Proceedings of the ICO Jerusalem 1976 Conference on Holography and Optical Processing (Pergamon, New York, 1977).
    [Crossref]
  2. A. W. Lohmann, W. T. Rhodes, Appl. Opt. 17, 1141 (1978).
    [Crossref] [PubMed]
  3. D. Gorlitz, F. Lanzl, Opt. Commun. 20, 68 (1977).
    [Crossref]
  4. H. H. Barrett et al., Opt. Commun. 28, 287 (1979).
    [Crossref]
  5. A. F. Gmitro et al., Opt. Eng. 19, 260 (1980).
  6. A. Rose, P. K. Weimer, H. B. Law, Proc. IRE 34, 424 (1946).
    [Crossref]
  7. R. B. Janes, R. E. Johnson, R. S. Moore, RCA Rev. 10, 191 (1949).

1980 (1)

A. F. Gmitro et al., Opt. Eng. 19, 260 (1980).

1979 (1)

H. H. Barrett et al., Opt. Commun. 28, 287 (1979).
[Crossref]

1978 (1)

1977 (1)

D. Gorlitz, F. Lanzl, Opt. Commun. 20, 68 (1977).
[Crossref]

1976 (1)

1949 (1)

R. B. Janes, R. E. Johnson, R. S. Moore, RCA Rev. 10, 191 (1949).

1946 (1)

A. Rose, P. K. Weimer, H. B. Law, Proc. IRE 34, 424 (1946).
[Crossref]

Barrett, H. H.

H. H. Barrett et al., Opt. Commun. 28, 287 (1979).
[Crossref]

Chavel, P.

Gmitro, A. F.

A. F. Gmitro et al., Opt. Eng. 19, 260 (1980).

Gorlitz, D.

D. Gorlitz, F. Lanzl, Opt. Commun. 20, 68 (1977).
[Crossref]

Janes, R. B.

R. B. Janes, R. E. Johnson, R. S. Moore, RCA Rev. 10, 191 (1949).

Johnson, R. E.

R. B. Janes, R. E. Johnson, R. S. Moore, RCA Rev. 10, 191 (1949).

Lanzl, F.

D. Gorlitz, F. Lanzl, Opt. Commun. 20, 68 (1977).
[Crossref]

Law, H. B.

A. Rose, P. K. Weimer, H. B. Law, Proc. IRE 34, 424 (1946).
[Crossref]

Lohmann, A. W.

Lowenthal, S.

Moore, R. S.

R. B. Janes, R. E. Johnson, R. S. Moore, RCA Rev. 10, 191 (1949).

Rhodes, W. T.

Rose, A.

A. Rose, P. K. Weimer, H. B. Law, Proc. IRE 34, 424 (1946).
[Crossref]

Weimer, P. K.

A. Rose, P. K. Weimer, H. B. Law, Proc. IRE 34, 424 (1946).
[Crossref]

Appl. Opt. (1)

J. Opt. Soc. Am. (1)

Opt. Commun. (2)

D. Gorlitz, F. Lanzl, Opt. Commun. 20, 68 (1977).
[Crossref]

H. H. Barrett et al., Opt. Commun. 28, 287 (1979).
[Crossref]

Opt. Eng. (1)

A. F. Gmitro et al., Opt. Eng. 19, 260 (1980).

Proc. IRE (1)

A. Rose, P. K. Weimer, H. B. Law, Proc. IRE 34, 424 (1946).
[Crossref]

RCA Rev. (1)

R. B. Janes, R. E. Johnson, R. S. Moore, RCA Rev. 10, 191 (1949).

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Figures (2)

Fig. 1
Fig. 1

Basic structure of image orthicon camera and typical behavior of secondary-emission ratio (δ) versus accelerating voltage (Vacc).

Fig. 2
Fig. 2

Experimental results. (a) Mask illuminated from behind, normal camera operating voltage, (b) Same mask as in (a), but spinning at ~150 rotations/sec. Camera voltages still normal. (c) Mask still spinning, but Vacc modulated about δ = 1 at the chopping frequency of ~1200 Hz. The camera thus synchronously demodulates the optical signal and displays a stroboscopic image. (d) Sets of LED’s. The two in the upper right and two in the lower left are being modulated at 10 kHz, the others are cw. Normal camera voltage. (e) Accelerating voltage modulated about δ = 1 at 10-kHz rate. Now the steady LED’s are not seen, but the modulated ones are synchronously demodulated and properly displayed.

Equations (1)

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h ( x , y ) = h + ( x , y ) h ( x , y ) ,

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