The invention concerns an optical switch for optical beams comprising a
series of optical input channels (110) and a series of optical output
channels (210), two optical index spatial modulating cells (300, 400)
adapted to respectively deflect an optical beam coming out of an input
channel and arriving onto an output channel, each series of optical
channels (110, 210) being distributed according to two dimensions
transverse to the direction of the channels and the index spatial
modulating cells (300, 400) being each designed to produce deflections
according to said two dimensions. The invention is characterised in that
it comprises at least a convergent optical assembly (500) overlapping one
first of the two cells (300, 400) and whereof the focus, defined relative
to the light path in the switch, is proximate to the plane of the other
cell, and the or each convergent optical assembly (500) has its optical
center (X) bordering a deflecting cell (300, 400), substantially
perpendicular to the center on one side of said cell.
