公开(公告)号：US07170831B2

公开(公告)日：2007-01-30

申请号：US10776194

申请日：2004-02-12

申请人： Hitoshi Takiguchi ,  Hidekazu Ouchi ,  Yasushi Kumamaru ,  Naoki Yamada ,  Tetsuya Murakami ,  Yoshinari Kuwabara ,  Ko Ishii

发明人： Hitoshi Takiguchi ,  Hidekazu Ouchi ,  Yasushi Kumamaru ,  Naoki Yamada ,  Tetsuya Murakami ,  Yoshinari Kuwabara ,  Ko Ishii

IPC分类号： G11B7/00

CPC分类号： G11B7/1392 ,  G11B7/1362 ,  G11B7/22

摘要： It is an object of the present invention to provide an optical pickup astigmatism adjusting method capable of easily correcting an astigmatism even if the spot shape of a light beam converged on an optical disc is not a true circle. An optical pickup astigmatism adjusting system of the present invention finds an inter-focal distance L0 between a focal position where a light beam is converged in RAD direction and another focal position where a light beam is converged in TAN direction, and a further inter-focal distance L45 between a focal position where a light beam is converged in a direction inclined 45 degrees from RAD direction and another focal position where a light beam is converged in a direction inclined 45 degrees from TAN direction, thereby measuring an astigmatism in accordance with the inter-focal distances L0 and L45. Then, an installation angle of a reflection mirror is adjusted in accordance with the inter-focal distances L0 and L45, thus correcting the astigmatism.

摘要翻译： 本发明的目的是提供一种即使光束聚光在光盘上的光斑形状不是真圆也能够容易地校正像散的光学拾取像散调整方法。 本发明的光拾取散光调节系统在光束在RAD方向上聚焦的焦点位置与光束在TAN中会聚的另一个焦点位置之间找到一个焦点间距离L 0 在与RAD方向倾斜45度的方向上会聚有光束的焦点位置与光束在方向上会聚的另一焦点位置的焦点位置之间的另一焦距距离L <45> 从TAN方向倾斜45度，从而根据焦距L L和L 45测量散光。 然后，根据焦点间距离L＆lt; 0＆gt;和L＆lt; 45＆gt;根据反射镜的安装角度来调节，从而校正像散。

公开(公告)号：US07064308B2

公开(公告)日：2006-06-20

申请号：US10776315

申请日：2004-02-12

申请人： Hitoshi Takiguchi ,  Hidekazu Ouchi ,  Yasushi Kumamaru ,  Naoki Yamada ,  Tetsuya Murakami ,  Yoshinari Kuwabara ,  Ko Ishii

发明人： Hitoshi Takiguchi ,  Hidekazu Ouchi ,  Yasushi Kumamaru ,  Naoki Yamada ,  Tetsuya Murakami ,  Yoshinari Kuwabara ,  Ko Ishii

IPC分类号： G02B7/04

CPC分类号： G11B7/22 ,  G11B7/08

摘要： It is an object of the present invention to adjust the focus position of an optical pickup. A brightness measuring apparatus having a half mirror and an objective lens focusing on the half mirror is disposed at a position facing an optical pickup PUi, in a manner such that the objective lens OB of the optical pickup PUi faces the half mirror. Then, the optical pickup PUi is operated to start a focus servo, while the position of multi-lens provided in the optical pickup PUi is changed continuously, thereby measuring a highest brightness of a spot light image incident on the half mirror through the objective lens, by virtue of the brightness measuring apparatus. Subsequently, a highest brightness change caused by changing the position of the multi-lens ML is inspected so as to fix the multi-lens ML at a position when the maximum highest brightness has been obtained, thereby effecting an optimum focus position adjustment for an optical pickup.

摘要翻译： 本发明的目的是调整光学拾取器的聚焦位置。 具有半反射镜和聚焦在半反射镜上的物镜的亮度测量装置设置在面对光学拾取器PUi的位置，使得光学拾取器PUi的物镜OB面向半反射镜。 然后，光拾取器PUi被操作以开始聚焦伺服，同时设置在光学拾取器PUi中的多透镜的位置被连续地改变，从而通过物镜测量入射在半反射镜上的点光图像的最高亮度 ，借助于亮度测量装置。 接着，检查通过改变多透镜ML的位置引起的最高亮度变化，以便将多透镜ML固定在获得最大最高亮度的位置，从而实现光学的最佳焦点位置调整 捡起。