Optical disk apparatus with different transmission factors for polarized light

An optical disk apparatus comprising:

• a light source for emitting light in a prescribed wavelength range;
• an objective lens system for causing the light emitted from the light source to be focused onto a storage disk;
• and
• a reproduction signal system for causing return light from the storage disk to be conducted to a detector;
• wherein the light emitted from the light source has a direction of polarization perpendicular to a recoding track of the storage disk, the objective lens system having transmission factors for s-polarized light and p-polarized light that are defined relative to the objective lens system, the transmission factor for p-polarized light being greater than the transmission factor for s-polarized light.

An optical disk apparatus comprising:

• a light source;
• an objective lens system for causing light emitted from the light source to be focused onto a storage disk;
• and
• a reproduction signal system for causing return light from the storage disk to be conducted to a detector, the reproduction signal system being provided with a transparent member having an incident surface and an exit surface;
• wherein at least one of the incident surface and the exit surface is an inclined surface that is slant relative to the return light and covered by a dielectric layer.