An available Herrnfeld Sensitometer has been rebuilt and modified to include a six position filter wheel, three narrow band interference filters, a separate D.C. power supply, and a central control panel. The modified sensitometer expedites the single layer exposure of color film. The system accomplishes this by using interference filters whose band-width peaks are matched to the peak spectral sensitivity of each emulsion layer to be exposed. A D.C. power supply has been included to eliminate lamp ripple caused by the oscillations that occur in the A.C. line. In depth experimentation (approximately 20 rolls of film) produced exposures closely approximating the theoretical results.
Library of Congress Subject Headings
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Schumann, G. W.
Tobin, Charles, "Modifications of a Herrnfeld Sensitometer for Interimage Studies" (1979). Thesis. Rochester Institute of Technology. Accessed from
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