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.

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  1. Parry Moon, J. Frank. Inst. 219, 17 (1935).
  2. Parry Moon and W. R. Mills, Jr., Rev. Sci. Inst. 6, 8 (1935).
  3. E. Lehrer, Zeits. f. tech. Physik 18, 393 (1937), has described a bolometer system which uses alternatingcurrent 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).
  6. S. E. Miller, Electronics 14, 27 (November, 1941).

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 alternatingcurrent 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, Jr., W. R.

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

Moon, Parry

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

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

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).

Other (6)

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

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

E. Lehrer, Zeits. f. tech. Physik 18, 393 (1937), has described a bolometer system which uses alternatingcurrent 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.

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

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).

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

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