Optical pickup head using multiple laser sources

An optical pickup head using multiple laser sources of different wavelengths for reading/writing data on optical recording media of varying densities, comprising:

• a first laser beam generator and a second laser beam generator, for generating a first laser beam and a second laser beam of different wavelengths, respectively;
• a beam shaper, allocated in optical paths of said first and second laser beams, and formed with a plurality of planes locating in different angles, comprising:
• an incident laser plane for refracting said second laser beam, to generate a refracted second laser beam;
• a first beam-composing interface for composing said refracted second laser beam with said first laser beam into an optical output path;
• a second beam-composing interface for composing said first and second laser beams,
• after they are being composed by said first beam-composing interface, with a third laser beam into said optical output path;
• an objective lens for focusing laser beams in said optical output path onto said optical recording media as an reading/writing spot;
• and
• a photo detector for transforming a reflective laser beam returning from said optical recording media into corresponding signals and accomplishing data retrieval;
• wherein said third laser beam is an incident laser beam generated by a third laser beam generator, refracted to said second beam-composing interface and composed into same optical output path.

A beam shaper, allocated in optical path of multiple laser sources of different wavelengths for reading/writing data on optical recording media of varying densities, and formed with a plurality of planes locating in varying angles, comprising:

• an incident laser for refracting a second laser beam to generate a refracted second laser beam;
• a first beam-composing interface for composing said refracted second laser beam with a first laser beam into an optical output path;
• and
• a second beam-composing interface for composing said first and second laser beams, after they are being composed by said first beam-composing interface, with a third laser beam into said optical output path;
• wherein said beam shaper is consisted of a first prism and a second prism which have different refractive indexes;
• said incident laser plane and said first beam-composing interface are formed on a same prism, while said second beam-composing interface is formed on a conjunction plane of said first prism and second prism.