专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5835476A Laser diode driving apparatus 失效
标题翻译：激光二极管驱动装置
公开(公告)号：US5835476A
公开(公告)日：1998-11-10
申请号：US488140
申请日：1990-03-05
申请人： Yoshimari Yamasaki , Yasunori Terayama , Toshiaki Iimura
发明人： Yoshimari Yamasaki , Yasunori Terayama , Toshiaki Iimura
IPC分类号： G11B7/125 , G11B7/00
CPC分类号： G11B7/126
摘要： A laser diode driving apparatus detects the laser power output of a semiconductor laser diode (13), irradiating a laser bean on a write-once or overwrite optical disk (11), by a detector (14), compares the resulting detection output signal by a comparator (17) with a laser power setting signal, modulates the resulting comparison output signal with record data by a modulating device (19), and drives the laser diode (13) by a driving device (22) with the resulting modulation output signal. By providing the modulation device (19) in the APC circuit adapted for controlling the output of the semiconductor laser diode (13), it becomes possible to automatically set the laser power necessary for recording to an optimum value, as well as to widen the temperature range and the working characteristics of the semiconductor laser diode.
摘要翻译： PCT No.PCT / JP89 / 00703 Sec。 371日期1990年3月5日 102（e）1990年3月5日PCT PCT 1989年7月12日PCT公布。公开号WO90 / 01206 日期1990年8月2日激光二极管驱动装置通过检测器（14）检测半导体激光二极管（13）的激光功率输出，用一次写入或重写光盘（11）照射激光束，通过具有激光功率设定信号的比较器（17）产生的检测输出信号，通过调制装置（19）对所得到的比较输出信号与记录数据进行调制，并用驱动装置（22）驱动激光二极管（13）产生的调制输出信号。通过在适于控制半导体激光二极管（13）的输出的APC电路中设置调制装置（19），可以将记录所需的激光功率自动设定为最佳值，并且扩大温度范围和半导体激光二极管的工作特性。

2. 发明授权

US4687296A Optical pickup 失效
标题翻译：光学拾音
公开(公告)号：US4687296A
公开(公告)日：1987-08-18
申请号：US768056
申请日：1985-08-22
申请人： Yasunori Terayama , Masashi Nakamura , Kazuhiko Fujiie , You Yoshitoshi
发明人： Yasunori Terayama , Masashi Nakamura , Kazuhiko Fujiie , You Yoshitoshi
IPC分类号： G11B7/09 , G02B7/04 , F16C25/06
CPC分类号： G11B7/0933 , G11B7/0932
摘要： An optical pickup of the invention has an objective lens holder holding an objective lens, a support shaft which supports the objective lens holder such that the holder is slidable along the axial direction and pivotable about its axis, and a press member for pressing the objective lens holder against the support shaft.
摘要翻译：本发明的光拾取器具有保持物镜的物镜支架，支撑物镜支架的支撑轴，使支架沿着轴向方向可滑动并绕其轴线转动;以及按压构件，用于按压物镜支架抵靠支撑轴。

3. 发明授权

US4742506A Tracking error detecting apparatus for an optical head with skew error reduction by using an inclined header portion 失效
标题翻译：用于通过使用倾斜头部部分而具有偏斜误差减小的光学头的跟踪误差检测装置
公开(公告)号：US4742506A
公开(公告)日：1988-05-03
申请号：US753570
申请日：1985-07-10
申请人： Atsushi Fukumoto , Kiyoshi Ohsato , Yasunori Terayama
发明人： Atsushi Fukumoto , Kiyoshi Ohsato , Yasunori Terayama
IPC分类号： G11B7/08 , G11B7/095 , G11B7/125 , G11B7/13 , H01S5/022
CPC分类号： G11B7/13 , G11B7/08 , G11B7/0956 , G11B7/127 , H01S5/005 , H01S5/02252
摘要： There is disclosed a tracking error detecting apparatus for an optical head, which includes a semiconductor laser apparatus, a diffraction grating, a beam splitter, an objective lens and a photo-detector, in which a laser beam from the semiconductor laser apparatus is divided into a main beam and two side beams at both sides of the main beam by the diffraction grating, the three beams are introduced through the beam splitter and the objective lens to an optical recording medium, beams reflected on the optical recording medium are introduced through the objective lens to the beam splitter and reflected thereon, the reflected beams are made incident on the photo-detector and detected outputs of at least two beams of the three beams from the photo-detector are used to produce a tracking error signal corresponding to the tacking state of the main beam on the optical recording medium. In this case, the reflection of the side beam of the reflected beams on the optical recording medium which passes through the objective lens, the beam splitter and the diffraction grating and returns to the semiconductor laser apparatus is redirected at a laser beam emission header portion to thereby reduce the influence by the skew of the optical disc on the tracking error signal.
摘要翻译：公开了一种用于光学头的跟踪误差检测装置，其包括半导体激光装置，衍射光栅，分束器，物镜和光电检测器，其中来自半导体激光装置的激光束被分成通过衍射光栅在主光束两侧的主光束和两个侧光束，通过分束器和物镜将三个光束引入光记录介质，通过目标引入在光记录介质上反射的光束透镜到分束器并在其上反射，反射光束入射到光检测器上，来自光检测器的三束光束的至少两束光的检测输出用于产生对应于定位状态的跟踪误差信号主光束在光记录介质上。在这种情况下，通过物镜，分束器和衍射光栅并返回到半导体激光装置的光记录介质上的反射光束的侧光束的反射在激光束发射头部被重定向到从而减少光盘的偏斜对跟踪误差信号的影响。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式