There is provided a micromirror device, which is provided with a mirror layer
including a mirror surface which is supported to be rotatable around a first axis
passing through a center of the mirror surface, and an upper substrate having transparency
including a first upper electrode part and a second upper electrode part arranged
on its surface facing the mirror layer to face each other via a first upper boundary
passing through a center of the surface and parallel to the first axis, and a lower
substrate including a first lower electrode part and a second lower electrode part
arranged on its surface facing the mirror layer to face each other via a first
lower boundary passing through a center of the surface and parallel to the first
axis. The upper substrate is stacked on one side of the mirror layer while securing
a first space between the center of the mirror surface and the first and second
upper electrode parts, while the lower substrate is stacked on the other side of
the mirror layer while securing a second space between the center of the mirror
surface and the first and second lower electrode parts. The mirror surface is rotated
around the first axis by applying voltage to a pair of the electrodes placed diagonally
with respect to the first axis.