An optical waveguide for emitting light of uniform intensity distributed over
the light emitting surface so as to suppress the occurrences of bright lines includes
an optical waveguide and surface light emitting apparatus that has a light emitting
plane and a reflecting plane that oppose each other. The reflecting surface has
a plurality of dots formed thereon so that light entering from the light source,
provided on one end face or two opposing end faces, is output through the light
emitting surface with uniform intensity, wherein the dots are arranged so as to
form band regions each being defined as a region that has a constant density of
distribution. A plurality of vertical lines of the dots are formed at substantially
equal intervals in each of the band regions in the direction toward adjacent bands,
and the interval between the vertical lines of dots is made different in different bands.
