In this paper we studied the photosensitivity and scatter properties of several types of photopolymers that are used in the
printing industry. We applied different measurement methodologies to experimentally characterize both the absorption
and scatter properties of the photopolymers. In a first part we measured the absorption spectra of different unexposed
photopolymers in the range between 350 and 1600 nm. From these spectra we calculated the absorbance coefficients.
After this, we repeated this procedure for the cured material which we obtained by illuminating the photopolymers with a
laser source. We investigated the absorption properties for different illumination times in the range between 0 and 2000
ms. From these measurements we could calculate for the different materials the difference in absorbance between the
cured and the non-cured material. Depending on the material the absorbance of the non-cured material was a factor 20 to
60 higher compared to the absorbance of the cured material. These results were used as input for the optical model.
In a next step we measured the BTDF for the different materials and calculated the scatter angle at 1/e2. As a result we
obtained scatter angles between 2° and 6°. In a last step we verified and confirmed these differences in scatter behavior
by measuring the MTF of a real imaging system that included the photopolymer.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.