The effect of simultaneous intensification on the detective quantum efficiency of Kodak high definition aerial film type 3414 is investigated. The detective quantum efficiency or DQE varies from .00086 % to .115 % for the unintensified exposure over a log exposure range of 0.9, with the peak at .1223 %. This exposure has a base+fog density of 0.06. Different degrees of simultaneous intensification result in varying values of DQE. The exposure with simultaneous intensification which produced a base+fog of 0.24 gave the maximum sensitometric speed incease by a factor of 1.38 f/stops or 158 %. This exposure varies in DQE from .012 % to .06 % over the same exposure range of 0.9 log unit with the peak at .06 %. The ratio of maximum DQE to minimum DQE for the unintensified exposure is 226:1; compared to the ratio 5:1 for the intensified exposure. This shows the variation in detectivity of the two exposures over a given range of exposure. It can be clearly seen that the intensified exposure maintains an overall higher and constant level of DQE even though the maximum DQE is not as high as the unintensified exposure.
Library of Congress Subject Headings
Images, Photographic; Photographic optics; Photography--Exposure
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Desai, B., "The Effect of Simultaneous Intensification on the Detective Quantum Efficiency" (1978). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus