An illumination apparatus includes a semiconductor laser device to generate a plurality of laser beams, a light wavelength conversion element configured to convert at least a portion of the light of the laser beams into light having a different wavelength, and an optical unit configured to direct the laser beams onto a surface of the light wavelength conversion element. The optical unit includes a mirror element able to be panned about an axis and is configured to guide the laser beams over at least one surface section of the surface of the at least one light wavelength conversion element. The optical unit includes a structure configured to adjust a divergence or expansion of the laser beams along at least one of a slow axis or a fast axis of the laser beams on the surface section of the surface of the at least one light wavelength conversion element.