Optical pickup having thermal expansion compensation

Details Optical pickup having thermal expansion compensation Optical pickup having thermal expansion compensation

2007-01-29

2011-12-27

Miller, Brian (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

C720S688000

Reexamination Certificate

active

08087038

ABSTRACT:
An aspect of the invention provides an optical pickup in which an optical axis is not displaced even if ambient temperature is changed. The optical pickup of the invention has an optical unit and an optical pickup case. The optical unit has a lens member having an optical axis, and the optical axis of the lens member is offset to one side from the center of the optical unit. The optical pickup case holds the optical unit from both sides. A thermal expansion amount of the optical unit is absorbed by compression amounts of a first adhesive and a second adhesive such that the optical axis of the lens member is not displaced when the optical unit is thermal expanded.

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Machine English translation of JP2005-108336; Furuichi et al. pp. 1-18.

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