Optical pickup head compatible with multiple optical recording media

An optical pickup head compatible with multiple optical recording media, comprising:

• three light sources for respectively emitting a first, a second and a third light beams with different wavelengths;
• a prism unit disposed beside the three light sources, including:
• a first aspherical surface for correcting aberrations of one of the first, second and third light beams caused by non-matching;
• a second aspherical surface for correcting aberrations of another of the first, second and third light beams caused by non-matching;
• a first interface;
• and
• a second interface;
• wherein the first light beam is reflected by the first interface, the second light beam directly passes through the first and second interfaces, and the third light beam is reflected by the second interface and directly passes through the first interface;
• a reflective multi-surface prism disposed beside the prism unit for redirecting light beams by way of internal reflection;
• and
• a collimating lens disposed beside the reflective multi-surface prism for collimating light beams therethrough;
• wherein the first aspherical surface at least partly corrects aberrations of said one of the first, second and third light beams caused by non-matching between said one of the first, second and third light beams and the collimating lens, and the second aspherical surface at least partly corrects aberrations of said another of the first, second and third light beams caused by non-matching between said another of the first, second and third light beams and the collimating lens.

An information recording and/or reproducing device compatible with multiple different optical recording media, said device having an optical pickup head to obtain information from a selective one of said multiple different optical recording media, said optical pickup head further comprising:

• a first light source emitting a first light beam with a first wavelength;
• a second light source emitting a second light beam with a second wavelength greater than said first wavelength;
• a third light source emitting a third light beam with a third wavelength greater than said second wavelength;
• a prism unit facing said first, second and third light sources for receiving said first, second and third light beams therefrom respectively, said prism unit having a first aspherical surface disposed to exclusively allow passage of said third light beam in said prism unit and a second aspherical surface disposed to exclusively allow passage of said second light beam in said prism unit;
• a reflective multi-surface prism for receiving said first, second and third light beams from said prism unit, and reflecting said received first, second and third light beams therein at least two times, and
• an objective lens disposed next to said selective one of said multiple different optical recording media for receiving said first, second and third light beams from said reflective multi-surface prism and transmitting said first, second and third light beams to said selective one of said multiple different optical recording media.