Hybrid lens unit and hybrid lens array

A hybrid lens unit having a hybrid lens used for an objective lens condensing a beam on a storage medium, the unit comprising:

• a lens holder having a beam passing cavity having a lens mounting groove on an upper portion of the beam passing cavity;
• a refraction lens having a plane portion mounted on the lens mounting groove to face the storage medium and an aspherical portion inserted into the beam passing cavity;
• and
• a diffraction lens part having a plane arranged to face the aspherical portion and a diffraction pattern part arranged toward an outside of the beam passing cavity, and coupled to a lower surface of the lens holder.

A hybrid lens unit comprising:

• a lens holder having a beam passing groove;
• a refraction lens having a plane portion arranged toward an outside of the beam passing groove and an aspherical portion inserted into the beam passing groove;
• and
• a diffraction lens part coupled to a lower portion of the lens holder to face the aspherical portion.

A hybrid lens array comprising:

• a lens holder array where lens holders each having a beam passing cavity having a lens mounting groove on an upper portion of the beam passing cavity are arranged in an array structure;
• refraction lenses each having a plane portion mounted on the lens mounting groove and an aspherical portion inserted into the beam passing cavity;
• and
• a diffraction lens array having diffraction pattern parts each arranged to correspond to the beam passing cavity, and coupled to the lens holder array.

A hybrid lens array comprising:

• a lens holder array having lens holders each having a beam passing groove and arranged in an array structure;
• refraction lenses having a plane portion positioned toward an outside of the beam passing groove and an aspherical portion inserted into the beam passing groove;
• and
• a diffraction lens array having diffraction pattern parts each arranged to correspond to the bean passing groove, and coupled to the lens holder array.