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Model examination of application of fluorescent substance to silver halide light-sensitive layers

Latacz L., Nowak P.

Optica Applicata

2001

Vol. 31, nr 1

165-175

The results of computer simulation of the outcomes of scattering, fluorescence and absorption of actinic light inside the hypothetical light-sensitive layer containing the silver halide crystals and fluorescent substance are presented. It has been assumed that the modelled layer is exposed exclusively 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 sensitized sensitivity range and the absorption probability of a photon of the wavelength from the intrinsic sensitivity range has been examined. Also, the dependence of the modulation transfer function curve on the above parameters has been studied. The results obtained indicate that under some circumstances an addition of fluorescent substance can enhance the photosensitivity of the layer and improve simultaneously the sharpness of the recorded image.

Czwartorzędowe sole izomerycznych 1,5-, 1,6- i 4,6-diazafenantrenów z 1,2-dibromoetanem

Peszke J., Śliwa W., Mielniczak M.

Prace Naukowe. Chemia / Wyższa Szkoła Pedagogiczna w Częstochowie

1998

Vol. 2

145--155

Opisano syntezę czwartorzędowych soli 1,5-, 1,6- i 4,6- diazafenantrenów z 1,2-dibromoetanem oraz podano strukturę elektronową i optymalizację geometrii tych związków, przeprowadzoną metodą CI AM1. Widma w nadfiolecie rozważanych układów porównano z widmami niepodstawionych diazafenantrenów.

The synthesis of quatemary salts of 1,5-, 1,6- and 4,6-diazaphenanthrenes with 1,2-dibromoethane is described along with their electronic structure and geometry optimization by CI AMI method. The UV spectra of the above salts have been compared with those of parent diazaphenanthrenes.