Thin type optical head
US5623372A · kind A · utility
4Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jun 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical head has the structure that an optical system is mounted on a movable body and is separated from a fixed optical system with which the optical system cooperates and an objective lens actuator does not have the magnetic circuit on the movable body. The objective lens actuator is balanced so that the focusing drive point of the objective lens actuator corresponds to the gravity center thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.