A filter including a base film, a plurality of light absorption units spaced apart from one another at regular intervals in the base film, and a focusing layer on the base film.

This impressive chart assembled by the web-based science "comic" XKCD shows how doses scale up in sieverts, the units by which absorption of radiation into living tissue is measured.

The results show that the number of thiophene units affects the properties of one-photon absorption and two-photon absorption.