| 摘要 |
A numerical aperture compensator of an optical pick-up is provided to prevent the compensation lens from tilting in the direction perpendicular to the optical axis by forcing the compensation lens against the seating boss with the elastic member. A numerical aperture compensator of an optical pick-up comprises a lens holder(32) in which a pair of seating bosses(34) are vertically protruded in parallel, a compensation lens(40) settled in the seating bosses in order to compensate the numerical aperture of light emitted from a laser diode, and an elastic member which is installed on the seating boss in order to cover the compensation lens and applies the elastic force in the direction that the compensation lens contacts close to the seating bosses. |
