Apparatus to drive objective lens of an optical pickup

Details Apparatus to drive objective lens of an optical pickup Apparatus to drive objective lens of an optical pickup

2005-07-12

2005-07-12

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With support

C359S822000, C359S823000, C359S819000, C359S813000

Reexamination Certificate

active

06917480

ABSTRACT:
An apparatus to drive a blade on which an objective lens is mounted including a first electromagnetic unit to generate a first electromagnetic force and a second electromagnetic unit to generate a second electromagnetic force such that when the first and second magnitudes are the same, the blade is driven in a focus direction, and when the magnitudes are different, the blade is driven in a tilt direction. Accordingly, a tilt error can be actively controlled so that a laser beam is incident on a disk in a precise direction therefore improving the qualities of recording and reproducing data. In addition, tilt control is performed by using a focus adjustment mechanism so that an additional mechanism to control tilt is not required. As a result, the size and weight of the apparatus to drive the objective lens of the optical pickup are reduced.

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