Optical reading apparatus
US4449213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1981 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Dec 15, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for supporting and positioning the objective lens in an optical reading apparatus, such as, a video disc player, comprises a first pair of parallel leaf springs attached at one end thereof to a fixed support member for motion parallel to a record medium surface. A movable frame is attached to the other ends of the first springs, and a second pair of leaf springs movable perpendicularly to the record medium surface extend from the frame, the second springs being generally parallel to and between the first pair but with their faces perpendicular to those of the first pair. The objective lens is mounted at the free ends of the second pair of springs, and is movable electromagnetically in orthogonally related directions by means of coils and magnets associated with the objective lens and with the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.