Photoemission diode standards for accurately measuring monochromatic ultraviolet light intensity (3000 Å–1100 Å) are described that are also blind to visible light (λ > 3600 Å). The standard uses an opaque photocathode of Cs2Te and is unique because of its combination of thinness (19 mm), high sensitivity (Q.E. > 10%), time stability, and uniformity of response. Design criteria, construction methods, and difficulties overcome in obtaining a stable, unform, high yield photocathode responses are discussed. Cs2Te is discussed in terms of a model for high yield photoemitters.
© 1973 Optical Society of America
Original Manuscript: October 11, 1972
Published: April 1, 1973
G. B. Fisher, W. E. Spicer, P. C. McKernan, V. F. Pereskok, and S. J. Wanner, "A Standard for Ultraviolet Radiation," Appl. Opt. 12, 799-804 (1973)