Patent ID: 7535813

Claim:
An optical pickup comprising: a moving base which moves itself in the direction of radius of a disc-formed recording medium set on a disc table; an objective lens driver disposed on the moving base; a plurality of light-emitting elements differed in type, each of which emits, towards a plurality of disc-formed recording media differed in type, laser beam of a wavelength of approximately 405 nm, approximately 660 nm and approximately 780 nm corresponded to each of the disc-formed media; an objective lens which condenses each laser beam onto a recording surface of said disc-formed recording medium; and a light-receiving element which receives the laser beam emitted from said light-emitting elements, and characterized in that: said objective lens condenses the laser beam onto the recording surface of the disc-formed recording medium to thereby form an elliptic beam spot; a long axis of a beam spot of said laser beam having a wavelength of approximately 660 nm is aligned in a direction more than 45° to less than 65° away from a tangential direction of the disc-formed recording medium; and a long axis of a beam spot of said laser beam having a wavelength of approximately 405 nm is aligned in a direction more than 25° to less than 45° away from the tangential direction of the disc-formed recording medium.