Objective lens actuator and method for manufacturing the same
US5734638A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Dec 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It is the object of the invention to decrease the gain peak of an objective lens holder at a natural frequency of a biaxial objective lens actuator used in an optical disc system using a reproducing-only-disc, a write-once-disc or an erasable disc. The out-line of a construction is such that each support for the objective lens holder is composed of plural elastic wires surrounded by damping material (silicone, for example), and a damping effect can be achieved by shearing stress caused in the damping material, and each of the support springs passes through a hole of a damping box, wherein the clearance between the support spring and the inner wall of the hole of the damping box is filled with gelled damping material. A further improvement of damping can be achieved by the damping box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.