Abstract

The dependence of SNR on operating voltage at low light intensities was investigated in PM’s of box-and-grid and venetian-blind structure, utilizing both the photon-counting and the dc methods of detection. SNR was found to be reasonably constant at both tube types in the tested range of operating voltages with the dc method of detection. In the photon-counting mode at a constant discriminating bias, SNR improved with rising operating voltage in the box-and-grid structure tube, but changed little in the venetian-blind structure tube.

© 1971 Optical Society of America

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References

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  1. R. Foord, R. Jones, C. J. Oliver, E. R. Pike, Appl. Opt. 8, 1975 (1969).
    [CrossRef] [PubMed]
  2. J. Rolfe, S. E. Moore, Appl. Opt. 9, 63 (1970).
    [CrossRef] [PubMed]
  3. M. Jonas, thesis.
  4. M. Gadsden, Appl. Opt. 2, 1446 (1965).
    [CrossRef]
  5. J. P. Rodman, H. J. Smith, Appl. Opt. 2, 181 (1963).
    [CrossRef]

1970 (1)

1969 (1)

1965 (1)

M. Gadsden, Appl. Opt. 2, 1446 (1965).
[CrossRef]

1963 (1)

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Figures (5)

Fig. 1
Fig. 1

Experimental setup block diagram.

Fig. 2
Fig. 2

SNR vs operating voltage in the photon-counting mode and in the dc mode of operation, tube 6256S, ser. no. 15006.

Fig. 3
Fig. 3

Dark current’s variational component vs operating voltage, by count method and current measurement method, tube 6256S, ser. no. 15006.

Fig. 4
Fig. 4

SNR vs operating voltage in the photon-counting mode and in the dc mode of operation, tube FW 130, ser. no. 116709. Light levels are different in the two operating modes.

Fig. 5
Fig. 5

Dark current’s variational component vs operating voltage, by count method and current measurement method, tube FW 130, ser. no. 116709.

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