Abstract

An alternating-current bolometer system has been developed for detecting and recording radiant energy in infra-red spectroscopy. Almost constant use over a ten-months’ period dictates certain improvements which are pointed out. The useful sensitivity is limited now by fluctuations originating in the power supply to the bolometer bridge.

© 1945 Optical Society of America

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References

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  1. Parry Moon, J. Frank. Inst. 219, 17 (1935).
    [Crossref]
  2. Parry Moon and W. R. Mills, Rev. Sci. Inst. 6, 8 (1935).
    [Crossref]
  3. E. Lehrer, Zeits. f. tech. Physik 18, 393 (1937), has described a bolometer system which uses alternating-current amplification. This system, however, differs in principle from the one described here. In that described by Lehrer, modulation of the bolometer output is obtained by periodically interrupting the radiation entering the spectrograph.
  4. Frank G. Brockman, J. Opt. Soc. Am., to be published.
  5. Tuning by a bridged T network in the inverse feed-back circuit was described by H. H. Scott, Proc. I. R. E. 26, 226 (1938).
    [Crossref]
  6. S. E. Miller, Electronics 14, 27 (November, 1941).

1941 (1)

S. E. Miller, Electronics 14, 27 (November, 1941).

1938 (1)

Tuning by a bridged T network in the inverse feed-back circuit was described by H. H. Scott, Proc. I. R. E. 26, 226 (1938).
[Crossref]

1937 (1)

E. Lehrer, Zeits. f. tech. Physik 18, 393 (1937), has described a bolometer system which uses alternating-current amplification. This system, however, differs in principle from the one described here. In that described by Lehrer, modulation of the bolometer output is obtained by periodically interrupting the radiation entering the spectrograph.

1935 (2)

Parry Moon, J. Frank. Inst. 219, 17 (1935).
[Crossref]

Parry Moon and W. R. Mills, Rev. Sci. Inst. 6, 8 (1935).
[Crossref]

Brockman, Frank G.

Frank G. Brockman, J. Opt. Soc. Am., to be published.

Lehrer, E.

E. Lehrer, Zeits. f. tech. Physik 18, 393 (1937), has described a bolometer system which uses alternating-current amplification. This system, however, differs in principle from the one described here. In that described by Lehrer, modulation of the bolometer output is obtained by periodically interrupting the radiation entering the spectrograph.

Miller, S. E.

S. E. Miller, Electronics 14, 27 (November, 1941).

Mills, W. R.

Parry Moon and W. R. Mills, Rev. Sci. Inst. 6, 8 (1935).
[Crossref]

Moon, Parry

Parry Moon, J. Frank. Inst. 219, 17 (1935).
[Crossref]

Parry Moon and W. R. Mills, Rev. Sci. Inst. 6, 8 (1935).
[Crossref]

Scott, H. H.

Tuning by a bridged T network in the inverse feed-back circuit was described by H. H. Scott, Proc. I. R. E. 26, 226 (1938).
[Crossref]

Electronics (1)

S. E. Miller, Electronics 14, 27 (November, 1941).

J. Frank. Inst. (1)

Parry Moon, J. Frank. Inst. 219, 17 (1935).
[Crossref]

Proc. I. R. E. (1)

Tuning by a bridged T network in the inverse feed-back circuit was described by H. H. Scott, Proc. I. R. E. 26, 226 (1938).
[Crossref]

Rev. Sci. Inst. (1)

Parry Moon and W. R. Mills, Rev. Sci. Inst. 6, 8 (1935).
[Crossref]

Zeits. f. tech. Physik (1)

E. Lehrer, Zeits. f. tech. Physik 18, 393 (1937), has described a bolometer system which uses alternating-current amplification. This system, however, differs in principle from the one described here. In that described by Lehrer, modulation of the bolometer output is obtained by periodically interrupting the radiation entering the spectrograph.

Other (1)

Frank G. Brockman, J. Opt. Soc. Am., to be published.

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Figures (8)

F. 1
F. 1

Bolometer bridge.

F. 2
F. 2

Bridge balance—input voltage.

F. 3
F. 3

Amplifier.

F. 4
F. 4

Amplifier resonance curves.

F. 5
F. 5

Noise study of amplifier.

F. 6
F. 6

Linearity of bridge, amplifier, and recorder.

F. 7
F. 7

Degenerative power amplifier.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

C = C o A I 2 ,
P = I 2 / C = C o / A C 1 / A .
Δ P = C o A C 2 Δ C = C o A Δ R .