A New Light Balancing Circuit for the Non-Recording Densitometer
JOSA, Vol. 36, Issue 11, pp. 676-678 (1946)
http://dx.doi.org/10.1364/JOSA.36.000676
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Abstract
A description is given of the application of the electron-multiplier photo-tube and the light-chopping method to the design of a densitometer. The techniques discussed are generally applicable to the measurement of very low light intensities.
Citation
R. O’B. CARPENTER, "A New Light Balancing Circuit for the Non-Recording Densitometer," J. Opt. Soc. Am. 36, 676-678 (1946)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-36-11-676
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