Optical apparatus for emitting light and automatic adjustment apparatus therefor

An optical apparatus for emitting light, comprising:

• a semi-conductor laser light source;
• a fixation holder for holding said semi-conductor laser light source;
• a collimator lens for collimating a laser beam emitted from said semi-conductor laser light source;
• and
• a lens-barrel being a substantially hollow member formed of a transparent material, for incorporating and holding said collimator lens, having collars on an outer surface thereof, being formed with slits extending in an optical axis direction on a portion opposite to said collimator lens with respect to said collars, and being fitted onto said fixation holder via a predetermined gap at the portion where the slits are formed so that said lens-barrel is movable in the optical axis direction and in two-dimensional directions on a plane perpendicular to the optical axis direction,
• wherein said lens-barrel is positioned and fixed to said fixation holder by curing an adhesive filled in the gap in the fitting portion between said lens-barrel and said fixation holder.