A compound of formula (1):

##STR00001##

wherein, A.sup.1 and A.sup.2 are a polymerizable group; n1 and n2 are an integer of 1 to 3; L.sup.1 is a single bond or an optionally branched (n1+1)-valent linking group; L.sup.2 is a single bond or an optionally branched (n2+1)-valent linking group; X is a single bond, a divalent organic group having 1 to 20 carbons, a sulfonyl group, or a divalent oxygen atom or sulfur atom; R.sup.1 and R.sup.2 are a fused aromatic ring group optionally having a substituent; and m1 and m2 are an integer of 2 to 4.

A method for continuously replicating a hologram by a device having a coating module, a lamination module, an exposure module and a fixing module involves coating a first carrier film with a liquid photopolymer using the coating module, applying a second carrier film to the coated first carrier film using the lamination module to obtain a photopolymer composite including a liquid photopolymer layer between two carrier films, bringing a region of the photopolymer composite in contact with an axially rotatable master element including a master hologram to be replicated in the exposure module, and exposing the region of the photopolymer composite to a light source, such that the master hologram is replicated on the photopolymer composite, and curing a replica hologram contained in the liquid photopolymer in the fixing module.

The disclosure relates to a benzopyrylium dye of the formula (I),

##STR00001##

in which R.sup.200, R.sup.201, R.sup.202, R.sup.203, R.sup.204, R.sup.205, R.sup.206, R.sup.207 and R.sup.208 independently of one another are each hydrogen, C.sub.1 to C.sub.16 alkyl, C.sub.4 to C.sub.7 cycloalkyl, C.sub.7 to C.sub.16 aralkyl, C.sub.6 to C.sub.10 (het)aryl, hydroxyl, C.sub.1 to C.sub.6 alkoxy, or dialkylamino, the dialkylamino being selected from the group consisting of diethylamino, dimethylamino, diisopropylamino, a six-membered saturated ring attached via the N of the amino group, which may additionally contain an N or O and may be substituted by nonionic arbitrary radicals, or a combination of at least two thereof, and/or R.sup.200 with R.sup.201 or R.sup.201 with R.sup.202 or R.sup.202 with R.sup.203 and/or R.sup.205 with R.sup.206 and/or R.sup.206 with R.sup.207 each independently of one another form a CHCHCHCH bridge, and A is a CH.sub.2 or a CH.sub.2CH.sub.2 bridge, where the anion An.sup.n has a molecular weight of 200 g/mol and does not contain a halogen atom.