Shape characterization of silver halide crystals

摘要

Abstract: Modern photographic films typically use T-grain silver halide crystals. These crystals are plate-like in physical shape and are particularly useful because of their high surface area to volume ratio, which is desirable because it allows a relatively large amount of spectral sensitizer to be absorbed to the crystal surfaces. They have been studied for many years but have not been used until relatively recently. Consequently, it is of interest to study the processes involved in making such crystals, and to control and optimize the manufacturing procedure. Unfortunately almost every variation in technique gives rise to a heterogeneous population; hence any statistically significant variation in the heterogeneity is almost impossible to detect by visual examination of electron-micrographs. Therefore a more automated technique for such an examination is very desirable.!3