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  1. Ives, A Precision Artificial Eye, Phys. Rev. 6, (5), 334; 1915.
    [CrossRef]
  2. Olpin, Inhibition of Photoelectric Emission by Near Infrared Light, Phys. Rev. 36, 376; 1930.
  3. Olpin, Method of Enhancing the Sensitiveness of Alkali Metal Photoelectric Cells, Phys. Rev.,  36, 251; 1930.
    [CrossRef]
  4. The Voltage Current Relation in Central Anode Photoelectric Cells, Ives and Fry, Astrophy J., July, 1922.
    [CrossRef]
  5. Uber Charakteristiken von Alkalizellen und ihre Bedeutung für die lichtelektrische Messmethode, Physik ZS.,  29, 691; 1928.
  6. An optically ideal method for eliminating the dividing edge between two fields is that use in the polarization flicker photometer (Phil. Mag., April, 1917, p. 360).
  7. An outstanding advantage of alternating exposure and alternating current amplification is that leakage currents and thermionic currents (which are of measurable magnitude at room temperature with some caesium cells) are blocked from the measuring system.
  8. The need for a smooth transition between the two fields under comparison is again to be emphasized in this connection. A finite dividing line will introduce an alternating current which sets a lower limit to sensitivity.
  9. See also Sewig, Die lichteleklrische Zelle als Messinstrument, ZS. für Instrumentenkunde,  50, 426; July, 1930. This paper contains many useful references.

1930 (3)

Olpin, Inhibition of Photoelectric Emission by Near Infrared Light, Phys. Rev. 36, 376; 1930.

Olpin, Method of Enhancing the Sensitiveness of Alkali Metal Photoelectric Cells, Phys. Rev.,  36, 251; 1930.
[CrossRef]

See also Sewig, Die lichteleklrische Zelle als Messinstrument, ZS. für Instrumentenkunde,  50, 426; July, 1930. This paper contains many useful references.

1928 (1)

Uber Charakteristiken von Alkalizellen und ihre Bedeutung für die lichtelektrische Messmethode, Physik ZS.,  29, 691; 1928.

1922 (1)

The Voltage Current Relation in Central Anode Photoelectric Cells, Ives and Fry, Astrophy J., July, 1922.
[CrossRef]

1917 (1)

An optically ideal method for eliminating the dividing edge between two fields is that use in the polarization flicker photometer (Phil. Mag., April, 1917, p. 360).

1915 (1)

Ives, A Precision Artificial Eye, Phys. Rev. 6, (5), 334; 1915.
[CrossRef]

Fry,

The Voltage Current Relation in Central Anode Photoelectric Cells, Ives and Fry, Astrophy J., July, 1922.
[CrossRef]

Ives,

The Voltage Current Relation in Central Anode Photoelectric Cells, Ives and Fry, Astrophy J., July, 1922.
[CrossRef]

Ives, A Precision Artificial Eye, Phys. Rev. 6, (5), 334; 1915.
[CrossRef]

Olpin,

Olpin, Inhibition of Photoelectric Emission by Near Infrared Light, Phys. Rev. 36, 376; 1930.

Olpin, Method of Enhancing the Sensitiveness of Alkali Metal Photoelectric Cells, Phys. Rev.,  36, 251; 1930.
[CrossRef]

Astrophy J. (1)

The Voltage Current Relation in Central Anode Photoelectric Cells, Ives and Fry, Astrophy J., July, 1922.
[CrossRef]

Phil. Mag. (1)

An optically ideal method for eliminating the dividing edge between two fields is that use in the polarization flicker photometer (Phil. Mag., April, 1917, p. 360).

Phys. Rev. (3)

Ives, A Precision Artificial Eye, Phys. Rev. 6, (5), 334; 1915.
[CrossRef]

Olpin, Inhibition of Photoelectric Emission by Near Infrared Light, Phys. Rev. 36, 376; 1930.

Olpin, Method of Enhancing the Sensitiveness of Alkali Metal Photoelectric Cells, Phys. Rev.,  36, 251; 1930.
[CrossRef]

Physik ZS. (1)

Uber Charakteristiken von Alkalizellen und ihre Bedeutung für die lichtelektrische Messmethode, Physik ZS.,  29, 691; 1928.

ZS. für Instrumentenkunde (1)

See also Sewig, Die lichteleklrische Zelle als Messinstrument, ZS. für Instrumentenkunde,  50, 426; July, 1930. This paper contains many useful references.

Other (2)

An outstanding advantage of alternating exposure and alternating current amplification is that leakage currents and thermionic currents (which are of measurable magnitude at room temperature with some caesium cells) are blocked from the measuring system.

The need for a smooth transition between the two fields under comparison is again to be emphasized in this connection. A finite dividing line will introduce an alternating current which sets a lower limit to sensitivity.

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Figures (18)

F. 1
F. 1

Illumination-current response of a potassium-hydride and a caesium-oxide cell.

F. 2
F. 2

Voltage-current relations of a vacuum and a gas-filled caesium-oxide cell.

F. 3
F. 3

Effect of different series resistances on the illumination-current response of a caesium-oxide cell. Constant battery voltage.

F. 4
F. 4

Variation in sensitivity of two caesium-oxide cells while illuminated.

F. 5
F. 5

Variation in spectral sensitivity produced by simultaneous irradiation with infrared light. Potassium cell treated with bromine.

F. 6
F. 6

Differences in sensitivity of two caesium-oxide cells throughout an equi-energy spectrum.

F. 7
F. 7

Variation in spectral sensitivity over the cathode surface of a caesium-oxide cell.

F. 8
F. 8

Change in spectral sensitivity with time, in a caesium-oxide cell.

F. 9
F. 9

Relative sensitivity throughout an equi-energy spectrum of some caesium-oxide photoelectric cells with different treatments of the cathode surface.

F. 10
F. 10

Voltage-current response of a vacuum potassium central anode cell with red and blue light.

F. 11
F. 11

Voltage-current response of a gas-filled central anode cell at different wave lengths according to Fleischer and Goldsmith.

F. 12
F. 12

Spectral response characteristics at various illuminations of a caesium thin film cell having a photo-sensitive, high resistance window. Full and dashed curves taken with electrometer across 560 resistance. Dot and dashed curves taken with galvanometer of 100,000 ohms resistance.

F. 13
F. 13

Relative sensitivity throughout an equi-energy spectrum of a potassium-hydride and a caesium-oxide cell at 90 volts.

F. 14
F. 14

Relative spectral sensitivity to tungsten light 2710° K color temperature of the potassium-hydride and the caesium-oxide cell shown in Fig. 13.

F. 15
F. 15

Spectral response curves of a caesium-oxide cell. Uncorrected curve as obtained by a prism spectrometer; tungsten curve corrected for dispersion of the spectrometer, but not for the energy distribution of the lamp at 2710° K color temperature; and equi-energy corrected for both.

F. 16
F. 16

Relative sensitivity throughout an equi-energy spectrum of potassium-hydride, potassium-sulphur vapor and sodium-sulphur cells.

F. 17
F. 17

Sensitivity throughout an equi-energy spectrum of caesium thin film, caesium thin film on magnesium plus sulphur vapor and sodium treated with krypto-cyanine.

F. 18
F. 18

Spectral response curves of a caesium thin film cell treated with sulphur. Uncorrected curve as obtained by a prism spectrometer; tungsten curve corrected for dispersion of the spectrometer but not for the energy distribution of the lamp at 2710° K color temperature; and equi-energy corrected for both.