Optical head device and optical information apparatus using the same

An optical head device comprising an optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens,

• the optical system comprising:
• a diffractive lens for correcting chromatic aberration occurring in the objective lens, a grating pitch of the diffractive lens being not more than 15 μm;
• and
• a light distribution correction element in which a transmittance at a peripheral portion of an aperture surface of the objective lens is higher than a transmittance at a central portion of the aperture surface of the objective lens, the light distribution correction element being provided for correcting a reduction of the intensity of the light incident on the aperture surface of the objective lens with a distance from the center of the aperture surface.