The optical modulator includes an optical waveguide for receiving light entered
from a first end surface thereof and for emitting the light from a second end surface
opposing to the first end surface, a flexible light transmitting member disposed
so as to face with a boundary surface of the optical waveguide and has a gap between
the flexible light transmitting member and the boundary surface of the optical
waveguide and a modulation device for bringing the flexible light transmitting
member into contact with the boundary surface of the optical waveguide. The image
recording apparatus includes the above exposure head and a scanning device for
relatively moving a photosensitive material and the exposure head.
