  The multiplicity of early-type stars is still not well established. The
studies of individual star forming regions suggest a connection with the age
and the environment. To fill in this gap, we started the first detailed
adaptive-optic-assisted imaging survey of 308 BA-type field stars within 300 pc
from the Sun, to derive their multiplicity in a homogeneous way. Our first
epoch observations yield 195 companion candidates around 117 sample targets.
The second epoch observations are underway.
