The invention relates to an optical modulation device for coupling an
entering radiation field (12), with which an incident radiation field (40)
is divided into a transmitted branch (40T) and a diffracted branch (40B)
by means of a first acousto-optical modulation and a diffracted and a
transmitted branch are respectively generated by means of a second
acousto-optical modulation so that the transmitted branch (40BUT)
resulting from the deflected diffracted branch (40BU) and the diffracted
branch (40TUB) resulting from the deflected transmitted branch (40TU)
propagate in approximately the same direction and form a first radiation
field (46) as a result of essentially constructive interference and, in
addition, the transmitted branch (40TUT) resulting from the deflected
transmitted branch (40TU) and the diffracted branch (40BUB) resulting from
the deflected diffracted branch (40BU) propagate in the same direction and
form a second radiation field (48) as a result of essentially destructive
interference.