公开(公告)号：US20120063281A1

公开(公告)日：2012-03-15

申请号：US13228222

申请日：2011-09-08

申请人： Shinzoh MURAKAMI ,  Mototaka Taneya ,  Takahide Ishigro ,  Katsushige Masui ,  Satoru Fukumoto ,  Takeshi Horiguchi

发明人： Shinzoh MURAKAMI ,  Mototaka Taneya ,  Takahide Ishigro ,  Katsushige Masui ,  Satoru Fukumoto ,  Takeshi Horiguchi

IPC分类号： G11B7/125 ,  H01L21/68 ,  G02B27/42

CPC分类号： G11B7/1353 ,  G11B7/1275

摘要： In a diffractive element, its grating pattern is so configured that a diffraction angle of a diffracted light beam of a light source that is subject to the first-order diffraction in a diffraction area is matched with an angle of a light beam passing through the diffractive area emitted from a light source and a light source position is matched with a light originating point of the light source that emits a light beam to be transmitted, and the center of light intensity distribution is matched with that of the light source passing through the diffractive element by inclining an optical axis of the light source. A position of the diffractive element is adjusted based on an electric current value generated when a reflected return path light beam of the light source is diffracted by the diffractive element and enters the light source.

摘要翻译： 在衍射元件中，其光栅图案被配置为使得衍射区域中经受一次衍射的光源的衍射光束的衍射角与通过衍射的光束的角度相匹配 从光源和光源位置发射的区域与发射要透射的光束的光源的发光点相匹配，并且光强度分布的中心与通过衍射的光源的光中心匹配 元件通过倾斜光源的光轴。 基于当光源的反射返回路径光束被衍射元件衍射并进入光源时产生的电流值来调节衍射元件的位置。

公开(公告)号：US20100097919A1

公开(公告)日：2010-04-22

申请号：US12581434

申请日：2009-10-19

申请人： Shinzoh MURAKAMI ,  Takehiro Shiomoto ,  Katsushige Masui ,  Osamu Hamaoka

发明人： Shinzoh MURAKAMI ,  Takehiro Shiomoto ,  Katsushige Masui ,  Osamu Hamaoka

IPC分类号： G11B7/135

CPC分类号： G11B7/0948 ,  G11B7/0903 ,  G11B7/131 ,  G11B7/1353

摘要： Provided is an optical pickup apparatus that can be made compact and is capable of producing stable push-pull signals. The optical pickup apparatus includes a light source, an objective lens, a diffraction element, a light-receiving element, and a control-driving section. The diffraction element receives light reflected from an optical recording medium. The light-receiving element receives light beams diffracted by the diffraction element. The light-receiving element has a plurality of light-receiving regions. The light-receiving region produces an output signal responsive to the quantity of the incident light beam. The control-driving section obtains differences among the output signals from a plurality of the light-receiving regions by calculation to derive a push-pull signal, and drives the objective lens under control on the basis of the push-pull signal.

摘要翻译： 提供一种可以制造得紧凑并且能够产生稳定的推挽信号的光学拾取装置。 光拾取装置包括光源，物镜，衍射元件，光接收元件和控制驱动部。 衍射元件接收从光记录介质反射的光。 光接收元件接收由衍射元件衍射的光束。 光接收元件具有多个光接收区域。 光接收区域响应入射光束的量产生输出信号。 控制驱动部通过计算得到来自多个受光区域的输出信号之间的差异，得到推挽信号，并根据推挽信号驱动物镜进行控制。

公开(公告)号：US20080232223A1

公开(公告)日：2008-09-25

申请号：US12048036

申请日：2008-03-13

申请人： Shinzoh MURAKAMI

发明人： Shinzoh MURAKAMI

IPC分类号： G11B7/00

CPC分类号： G11B7/0903 ,  G11B7/0912 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： There is provided an optical pickup apparatus and a beam splitter which are capable of suppressing an adverse effect resulting from light reflected by a non-light-condensed layer that is different from a light-condensed layer. In respective TES light-receiving sections, interposed light-receiving elements are disposed so as to be adjacent to first sub beam-receiving elements. The interposed light-receiving elements are disposed away from both of positions where a main beam reflected by a light-condensing recording layer is condensed and where respective sub beams reflected by the light-condensing recording layer are condensed, and disposed so as to be adjacent to the first sub beam-receiving elements. The interposed light-receiving elements receive the main beam reflected by a non-light-condensing recording layer In a compensating section, results of light received by the first sub beam-receiving elements are compensated based on results of light received by the interposed light-receiving elements.

摘要翻译： 提供了一种光学拾取装置和分束器，其能够抑制由与光聚集层不同的非光聚集层反射的光产生的不利影响。 在相应的TES光接收部分中，插入的光接收元件设置成与第一子光束接收元件相邻。 所插入的光接收元件被设置为远离由聚光记录层反射的主光束被聚集的位置，并且由聚光记录层反射的各个子光束被冷凝，并且被设置为相邻 到第一子光束接收元件。 插入的光接收元件接收由非聚光记录层反射的主光束。在补偿部分中，由第一子光束接收元件接收的光的结果基于插入的光接收元件所接收的光的结果来补偿， 接收元件。