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    • 1. 发明申请
    • RECORDER
    • 录音机
    • WO1999021181A1
    • 1999-04-29
    • PCT/JP1997003750
    • 1997-10-16
    • SEIKO EPSON CORPORATIONYAMADA, Hideaki
    • SEIKO EPSON CORPORATION
    • G11B07/09
    • B23K26/04G11B7/0908G11B7/261
    • A PD (81) is positioned at a predetermined position on an optical table, the rotation of a resist master (110) is stopped, a focusing laser (73) is driven, and a head (77) is positioned in a proper position by a head slider control circuit (101). The master (110) is turned, a focusing servo circuit (103) is started and, the PD (81) is moved horizontally by a focus fine adjustment circuit (99) by a minute distance corresponding to an estimated adequate focus position data. Since the difference between voltage signals from the two output terminals of the PD (81) is varied because of the surface vibration and minute movement caused by the rotation of the master (110), a differential amplifier (103a) moves a recording lens (77a) vertically by a distance of several microns so as to make an error signal zero. Numerical information on a digital display (93) at this time is compared with the focus position data. When both of them agree with each other, the focus position data is employed as an adequate focus position data and used for the initial setting of the adequate focus position. When they do not agree with each other, the numerical information is employed as the adequate focus position data and the focus position data is rewritten. By using the numerical adequate focus position data, the inital setting of the adequate focus position matching the type of the resist master can be carried out easily.
    • PD(81)位于光学平台上的预定位置,停止抗蚀剂母体(110)的旋转,驱动聚焦激光(73),并且通过以下方式将头(77)定位在适当位置: 磁头滑块控制电路(101)。 主机(110)转动,聚焦伺服电路(103)启动,PD(81)由焦点微调电路(99)水平移动与估计的足够对焦位置数据相对应的微小距离。 由于由于主机(110)的旋转引起的表面振动和微小移动,PD(81)的两个输出端子的电压信号之间的差异是变化的,差分放大器(103a)使记录透镜(77a)移动 )垂直延伸几微米的距离,以使误差信号为零。 此时将数字显示器(93)上的数值信息与焦点位置数据进行比较。 当它们都彼此一致时,聚焦位置数据被用作适当的聚焦位置数据,并用于初始设定足够的聚焦位置。 当它们不一致时,使用数字信息作为适当的焦点位置数据,并且重写焦点位置数据。 通过使用数值适当的聚焦位置数据,可以容易地进行与抗蚀剂母版类型匹配的适当聚焦位置的初始设置。
    • 5. 发明申请
    • RECORDER
    • 录音机
    • WO1998027550A1
    • 1998-06-25
    • PCT/JP1997004645
    • 1997-12-16
    • SEIKO EPSON CORPORATIONYAMADA, Hideaki
    • SEIKO EPSON CORPORATION
    • G11B07/00
    • G11B7/126G11B7/26G11B7/261G11B20/10194
    • In a recorder, a pit gain selection circuit (33) converts the amplitude corresponding to the pit length data into gain data and outputs the gain data to a pit recording signal generating circuit (39) through a timing regulation circuit (35). The generating circuit (39) selects the gain data corresponding to the pit signal length and converts it into an analog signal. A groove correction value selection circuit (41) converts the pit length data into a groove correction value and outputs it to a groove correction signal generating circuit (47) through a timing regulation circuit (45). The generating circuit (47) finds a groove signal correction value and converts it into an analog signal and outputs the analog signal to a subtracter (51). The subtracter (51) subtracts the analog signal sent from the generating circuit (47) from an analog signal from a D/A converter (49). The power corresponding to the power superposed upon a groove recording beam is cancelled only when a pit is cut by the side lobe of a pit recording beam. Thus, a recorder which enables production of an optical disc from which appropriate signals of the pits and grooves can be obtained at the time of reproduction even if physical high density recording is performed is provided.
    • 在记录器中,凹坑增益选择电路(33)将对应于凹坑长度数据的幅度转换为增益数据,并通过定时调节电路(35)将增益数据输出到凹坑记录信号发生电路(39)。 发生电路(39)选择与凹坑信号长度对应的增益数据,并将其转换为模拟信号。 凹槽校正值选择电路(41)将凹坑长度数据转换为凹槽校正值,并通过定时调节电路(45)将其输出到凹槽校正信号生成电路(47)。 发生电路(47)求出沟槽信号校正值并将其转换为模拟信号,并将模拟信号输出到减法器(51)。 减法器(51)从来自D / A转换器(49)的模拟信号中减去从发生电路(47)发送的模拟信号。 与凹槽记录光束叠加的功率相对应的功率仅在凹坑记录光束的旁瓣切割凹坑时被抵消。 因此,即使进行了物理高密度记录,也可以在再现时能够获得可以获得凹坑和凹槽的适当信号的光盘的记录器。