PURPOSE: To securely hold an objective lens by providing a groove enclosing an objective lens to the lens holding member and applying an adhesive thereto.
CONSTITUTION: This optical pickup holds the objective lens 10 with the objective lens holding member 20. The member 20 is constituted by forming a rib 20a at its top end face so as to enclose the outer periphery of the lens 10 and forming a wall surface so as to enclose the ring 10. The groove opening on the upper side is formed by the outer periphery and wall surface of the lens 10 and the adhesive is applied to this groove. Since the groove opens to the upper side, the outflow of the adhesive is prevented even if a large amt. of the adhesive is applied. The lens 10 is thus securely held. The rib 20a is formed along the outside shape of the member 20, by which the coated amt. of the adhesive is increased. Since the member 20 is integrally formed, the constitution over the entire surface is simplified. The secure holding of the lens 10 is thus possible.
NAGASHIMA KENJI
MATSUMURA MASASHI
