An active optical system with a conjugated with a discharge tube of a
He-Sr recombination laser emitting in the blue region (430 nm), which
is used as an amplifier, has been tested for the first time. A high-co
ntrast magnified image convenient for observation has been obtained. I
t has been demonstrated that for active image formation not only laser
s with high gain can be used, but those with a relatively low gain (0.
05 cm-1) and a rather long population existence (150-200 ns) too.