Photoelectric devices: Spectral sensitivity
المؤلف:
A. Roy, D. Clarke
المصدر:
Astronomy - Principles and Practice 4th ed
الجزء والصفحة:
p 293
24-8-2020
1742
Photoelectric devices: Spectral sensitivity
A range of photocathodes is available covering the spectrum from the ultraviolet to about 10 000 A˚ . The cut-off in the ultraviolet is controlled by the glass envelope of the cell and, by using a quartz window above the cathode, the ultraviolet sensitivity can be extended. The various spectral responses are designated by a number (e.g. S–1) and three such sensitivity curves are depicted in figure 1.
Figure 1. The spectral sensitivity of various photocathodes.
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