| abstract |
The present invention includes a photoinitiator containing a polyol component, a polyisocyanate component, a writing monomer and a co-initiator and a dye of the formula FAn, where F represents a cationic dye and An represents an anion. The dye of formula FAn relates to a photopolymer formulation containing ≦ 5% water absorption. Furthermore, the present invention comprises a holographic medium, in particular in the form of a film, containing a photopolymer formulation according to the invention, the use of such a medium for recording holograms, and a photopolymer formulation according to the invention. Relates to the specific dyes possible. |