| 发明名称 | Optical recording and playback apparatus | ||
| 摘要 | An optical recording and playback apparatus includes: a light source configured to emit a light beam; a tracking mirror configured to change a direction of the light beam; a collimator configured to form the light beam into a parallel light beam; an objective lens configured to collect the parallel light beam to the optical tape; a lens actuator configured to adjust a position of the objective lens in a focus direction of the optical tape and a position of the objective lens in a tracking direction of the optical tape; a polarization hologram plate configured to separate a reflected light beam of the light beam; a photodetector receiving elements configured to receive the plurality of light fluxes; and a control circuit configured to control the lens actuator and the tracking mirror. The tracking mirror is disposed near the light source, and movable in the tracking direction. | ||
| 申请公布号 | US9330705(B2) | 申请公布日期 | 2016.05.03 |
| 申请号 | US201514627353 | 申请日期 | 2015.02.20 |
| 申请人 | Panasonic Intellectual Property Management Co., Ltd. | 发明人 | Saitoh Yohichi;Hayashi Hideki;Asada Jun-ichi |
| 分类号 | G11B7/09;G11B7/1392;G11B7/003;G11B7/24009;G11B7/1362;G11B7/13;G11B7/1353;G11B7/00 | 主分类号 | G11B7/09 |
| 代理机构 | Renner, Otto, Boisselle & Sklar, LLP | 代理人 | Renner, Otto, Boisselle & Sklar, LLP |
| 主权项 | 1. An optical recording and playback apparatus comprising: a light source configured to emit a light beam for forming a recording mark in an optical tape or a light beam for reading a state of the recording mark; a tracking mirror configured to change a direction of the light beam emitted from the light source; a collimator configured to form the light beam going through the tracking mirror into a parallel light beam; an objective lens configured to collect the parallel light beam from the collimator to the optical tape; a lens actuator configured to adjust a position of the objective lens in a focus direction of the optical tape and a position of the objective lens in a tracking direction of the optical tape; a polarization hologram plate configured to separate a reflected light beam of the light beam with which the optical tape is irradiated through the objective lens into a plurality of light fluxes; a photodetector having a plurality of light receiving elements configured to receive the plurality of light fluxes; and a control circuit configured to control the lens actuator and the tracking mirror, wherein the tracking mirror is disposed near the light source, and movable in the tracking direction, a numerical aperture of the objective lens ranges from 0.8 to 0.9 inclusive, and the tracking mirror is movable within ±0.3 degrees in the tracking direction. | ||
| 地址 | Osaka JP | ||