Patent ID: 7112616

Claim:
A two-photon absorbing polymerizable composition comprising at least a two-photon absorbing compound, a polymerization initiator and a polymerizable compound, said composition being photopolymerizable upon non-resonant two-photon absorption, wherein said two-photon absorbing compound is a cyanine dye represented by the following formula (3), a merocyanine dye represented by the following formula (4), an oxonol dye represented by the following formula (5) or a dye compound represented by the following formula (1): wherein R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom or a substituent and some of R 1 , R 2 , R 3 and R 4 may combine with each other to form a ring; n and m each independently represents an integer of 0 to 4 and when n and m each is 2 or more, the plurality of R 1 s, R 2 s, R 3 s or R 4 s may be the same or different, provided that n and m are not 0 at the same time; and X 1 and X 2 each independently represents an aryl group, a heterocyclic group or a group represented by formula (2): wherein R 5 represents a hydrogen atom or a substituent, R 6 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group, and Z 1 represents an atomic group for forming a 5- or 6-membered ring; wherein Za 1 , Za 2 and Za 3 each represents an atomic group for forming a 5- or 6-membered nitrogen-containing heterocyclic ring, Za 4 , Za 5 and Za 6 each represents an atomic group for forming a 5- or 6-membered ring, Ra 1 , Ra 2 and Ra 3 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group, Ma 1 to Ma 14 each independently represents a methine group, which may have a substituent or may form a ring together with another methine group, na 1 , na 2 and na 3 each represents 0 or 1, ka 1 and ka 3 each represents an integer of 0 to 3, provided that when ka 1 is 2 or more, multiple Ma 3 s or Ma 4 s may be the same or different and when ka 3 is 2 or more, multiple Ma 12 s or Ma 13 s may be the same or different, ka 2 represents an integer of 0 to 8, provided that when ka 2 is 2 or more, multiple Ma 10 s or Ma 11 s may be the same or different, CI represents an ion for neutralizing the electric charge, and y represents a number necessary for the neutralization of electric charge.