Model examination of application of fluorescent substance to silver halidelight-sensitive layers

The results of computer simulation of the outcomes of scattering fluorescen ce and absorption of actinic light inside the hypothetical light-sensitive layer containing the silver halide crystals and fluorescent substance are p resented. It has been assumed that the modelled layer is exposed exclusivel y to the radiation of the wavelength belonging to the intrinsic sensitivity range of silver halide. The quantitative dependence of the effective light absorption by the silver halide on the fluorescent substance concentration , the layer thickness, quantum efficiency of fluorescence and the ratio of the absorption probability of a photon of wavelength belonging to the sensi tized sensitivity range and the absorption probability of a photon of the w avelength from the intrinsic sensitivity range has been examined. Also, the dependence of the modulation transfer function curve on the above paramete rs has been studied. The results obtained indicate that under some circumst ances an addition of fluorescent substance can enhance the photosensitivity of the layer and improve simultaneously the sharpness of the recorded imag e.