Reproducing device and reproducing method
US8867324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2013 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Jul 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24079
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reproducing device includes a light generation and emission unit that obtains signal light as reflection light, which reflects recording signals of a land and a groove, by irradiating an optical recording medium with light and generates reference light so as to emit the signal light and the reference light in a superposed manner, a detection optical system that generates a first combination of signal light and reference light, a second combination of signal light and reference light, a third combination of signal light and reference light, and a fourth combination of signal light and reference light respectively, a light receiving unit in which the first to fourth combinations of signal light and reference light are respectively received by first to fourth light receiving elements, and a reproduction unit that reproduces the recording signals of the land and the groove on the basis of first to fourth light receiving signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.