公开(公告)号：US4625303A

公开(公告)日：1986-11-25

申请号：US647124

申请日：1984-09-04

Applicant: Shinsuke Shikama ,  Mitsushige Kondou ,  Nobumasa Egashira ,  Kazuo Okada

Inventor： Shinsuke Shikama ,  Mitsushige Kondou ,  Nobumasa Egashira ,  Kazuo Okada

IPC: G02B7/28 ,  G11B7/09 ,  G11B7/13 ,  G11B7/00

CPC classification number: G11B7/0909 ,  G11B7/094 ,  G11B7/13

Abstract: An automatic focusing device for controlling the position of the objective lens relative to the information recording medium is provided with an astigmatic optical system which receives the reflected light beam reflected by the information recording medium. The light receiving surface of a light detector included in the astigmatic optical system consists of a central light receiving section formed approximatley symmetrically with respect to two axes intersecting each other perpendicularly and having a constricted central portion, and two side light receiving sections formed approximately symmetrically with respect to those two axes and opposite to each other. The light reception signal given by the central light receiving section and the light reception signals given by the side light receiving sections are fed to a focal position detecting circuit which gives a signal corresponding to the deviation of the objective lens from the focused position, on the basis of the light reception signals given thereto.

Abstract translation: 设置有用于控制物镜相对于信息记录介质的位置的自动对焦装置，其具有接收由信息记录介质反射的反射光束的像散光学系统。 包括在像散光学系统中的光检测器的光接收表面由中心光接收部分组成，该中心光接收部分相对于彼此垂直相交的两个轴对称地形成并具有收缩的中心部分，以及两个侧光接收部分，大致对称地形成 相对于这两个轴线彼此相对。 由中央光接收部分给出的光接收信号和由侧光接收部分给出的光接收信号被馈送到聚焦位置检测电路，该焦点位置检测电路将对应于物镜偏离聚焦位置的信号， 给出的光接收信号的基础。

公开(公告)号：US4888760A

公开(公告)日：1989-12-19

申请号：US159412

申请日：1988-02-12

Applicant: Shinsuke Shikama ,  Eiichi Toide ,  Mitsushige Kondou ,  Kazuo Iwata

Inventor： Shinsuke Shikama ,  Eiichi Toide ,  Mitsushige Kondou ,  Kazuo Iwata

IPC: G11B7/125 ,  H01S5/02

CPC classification number: G11B7/127 ,  H01S5/02 ,  H01S5/0207

Abstract: In case that the light beam emitted from a light source mounted on a base element is focused to a spot light on a data storage media to write the data, when the light beam reflected from the data storage media to return to the light source is reflected from the base element and focused again on the data storage media, it becomes difficult to precisely read/write the data on the storage media. In order to resolve the above problem, a light beam treating means is provided in the base element to prevent the re-incident light beams from being reflected toward the data storage media and focused thereon.

Abstract translation: 在从安装在基座元件上的光源发射的光束聚焦到数据存储介质上的点光以写入数据的情况下，当从数据存储介质反射回到光源的光束被反射时 从基本元素再次聚焦在数据存储介质上，难以在存储介质上精确地读/写数据。 为了解决上述问题，光束处理装置设置在基体元件中，以防止再入射光束朝向数据存储介质反射并聚焦在其上。

公开(公告)号：US4859033A

公开(公告)日：1989-08-22

申请号：US188210

申请日：1988-04-29

Applicant: Keizo Kono ,  Mitsushige Kondou ,  Natsuro Tsubouchi ,  Shiro Hine ,  Hiroshi Nishihara ,  Toshiaki Suhara

Inventor： Keizo Kono ,  Mitsushige Kondou ,  Natsuro Tsubouchi ,  Shiro Hine ,  Hiroshi Nishihara ,  Toshiaki Suhara

IPC: G11B7/12 ,  G11B7/135

CPC classification number: G11B7/1384 ,  G11B7/124 ,  Y10S359/90

Abstract: An optical IC-type head assembly for recording and for reading information on an optical disc, comprising a substrate, a light guiding layer comprising a dielectric thin film formed monolithically on the substrate, a laser oscillator for injecting the laser beam into the light guiding layer, a grating coupler for converging the laser beam on the optical disc, and a photo detector for receiving the beam reflected by the optical disc and coming out of the grating coupler. In one embodiment the substrate is made of material having cleavability. One side surface of the light guiding layer receiving the laser beam is a break surface formed by cleaving the substrate along the cleavage plane. The photo detector is disposed at the break surface of the light guiding layer. The substrate is preferably made of single crystal material. In another embodiment, a beam splitter is disposed between the laser oscillator and the grating coupler for splitting the reflected beam coming out of the grating coupler into two symmetrical beams. Each split beam forms an acute angle with respect to the optical axis of the reflected beam. The acute angle is preferably less than 30 degrees. The beam splitter may converge each of the split beams at a photo detecting element disposed between the laser oscillator and the grating coupler.

Abstract translation: 一种用于记录和读取光盘上的信息的光学IC型头组件，包括基底，包括在基底上一体地形成的电介质薄膜的导光层，用于将激光束注入导光层的激光振荡器 ，用于将激光束会聚在光盘上的光栅耦合器，以及用于接收由光盘反射并从光栅耦合器出来的光束的光电检测器。 在一个实施例中，衬底由具有可切割性的材料制成。 接收激光束的导光层的一个侧表面是通过沿着解理面切割基板而形成的断裂面。 光检测器设置在导光层的断裂面处。 衬底优选由单晶材料制成。 在另一个实施例中，分束器设置在激光振荡器和光栅耦合器之间，用于将从光栅耦合器出来的反射光束分成两个对称光束。 每个分割光束相对于反射光束的光轴形成锐角。 锐角优选小于30度。 分束器可以在设置在激光振荡器和光栅耦合器之间的光电检测元件上会聚每个分束。

公开(公告)号：US4987566A

公开(公告)日：1991-01-22

申请号：US341649

申请日：1989-04-21

Applicant: Shinsuke Shikama ,  Eiichi Toide ,  Mitsushige Kondou ,  Kazuo Iwata

Inventor： Shinsuke Shikama ,  Eiichi Toide ,  Mitsushige Kondou ,  Kazuo Iwata

IPC: G11B7/125 ,  H01S5/02

CPC classification number: G11B7/127 ,  H01S5/02 ,  H01S5/0207

Abstract: In case that the light beam emitted from a light source mounted on a base element is focused to a spot light on a data storage media to write the data, when the light beam reflected from the data storage media to return to the light source is reflected from the base element and focused again on the data storage media, it becomes difficult to precisely read/write the data on the storage media. In order to resolve the above problem, a light beam treating means is provided in the base element to prevent the re-incident light beams from being reflected toward the data storage media and focused thereon.

公开(公告)号：US4779259A

公开(公告)日：1988-10-18

申请号：US855110

申请日：1986-04-23

Applicant: Keizo Kono ,  Mitsushige Kondou ,  Natsuro Tsubouchi ,  Shiro Hine ,  Hiroshi Nishihara ,  Toshiaki Suhara

Inventor： Keizo Kono ,  Mitsushige Kondou ,  Natsuro Tsubouchi ,  Shiro Hine ,  Hiroshi Nishihara ,  Toshiaki Suhara

IPC: G11B7/12 ,  G11B7/135 ,  G11B7/00 ,  G11B21/10

CPC classification number: G11B7/1384 ,  G11B7/124 ,  Y10S359/90

Abstract: An optical IC-type head assembly for recording and for reading information on an optical disc, comprising a substrate, a light guiding layer comprising a dielectric thin film formed monolithically on the substrate, a laser oscillator for injecting the laser beam into the light guiding layer, a grating coupler for converging the laser beam on the optical disc, and a photo detector for receiving the beam reflected by the optical disc and coming out of the grating coupler. In one embodiment the substrate is made of material having cleavability. One side surface of the light guiding layer receiving the laser beam is a break surface formed by cleaving the substrate along the cleavage plane. The photo detector is disposed at the break surface of the light guiding layer. The substrate is preferably made of single crystal material. In another embodiment, a beam splitter is disposed between the laser oscillator and the grating coupler for splitting the reflected beam coming out of the grating coupler into two symmetrical beams. Each split beam forms an acute angle with respect to the optical axis of the reflected beam. The acute angle is preferably less than 30 degrees. The beam splitter may converge each of the split beams at a photo detecting element disposed between the laser oscillator and the grating coupler.

Abstract translation: 一种用于记录和读取光盘上的信息的光学IC型头组件，包括基底，包括在基底上一体地形成的电介质薄膜的导光层，用于将激光束注入导光层的激光振荡器 ，用于将激光束会聚在光盘上的光栅耦合器，以及用于接收由光盘反射并从光栅耦合器出来的光束的光电检测器。 在一个实施例中，衬底由具有可切割性的材料制成。 接收激光束的导光层的一个侧表面是通过沿着解理面切割基板而形成的断裂面。 光检测器设置在导光层的断裂面处。 衬底优选由单晶材料制成。 在另一个实施例中，分束器设置在激光振荡器和光栅耦合器之间，用于将从光栅耦合器出来的反射光束分成两个对称光束。 每个分割光束相对于反射光束的光轴形成锐角。 锐角优选小于30度。 分束器可以在设置在激光振荡器和光栅耦合器之间的光电检测元件上会聚每个分束。

公开(公告)号：US4730899A

公开(公告)日：1988-03-15

申请号：US539056

申请日：1983-10-04

Applicant: Kenjiro Kime ,  Kazuo Okada ,  Mitsushige Kondou

Inventor： Kenjiro Kime ,  Kazuo Okada ,  Mitsushige Kondou

IPC: G11B7/08 ,  G11B7/12 ,  G11B7/135 ,  G11B7/1356 ,  G02B27/14 ,  G01J1/20 ,  G11B7/00

CPC classification number: G11B7/1356 ,  G11B7/08 ,  G11B7/12

Abstract: An optical signal reading device comprising a laser light source (101), an objective (107) slidable in the direction of the optical axis which is at right angles to the disc surface of a disc-like record carrier, a light detector (110) for receiving the reflected light coming from the disc surface via the objective, and a beam splitter (104) comprised of a single optical part disposed between the light source (101), light detector (110), and objective (107). The splitter has a pair of reflecting surfaces disposed approximately parallel to each other to ensure that the incident light from the light source (101) and the reflected light guided to the light detector (110) are parallel and opposite to each other.

Abstract translation: 一种光信号读取装置，包括激光源（101），在与光盘状记录载体的盘表面成直角的光轴方向上可滑动的物镜（107），光检测器（110） 用于经由物镜接收来自盘表面的反射光;以及分光器（104），其包括设置在光源（101），光检测器（110）和物镜（107）之间的单个光学部件。 分离器具有大致彼此平行设置的一对反射表面，以确保来自光源（101）的入射光和被引导到光检测器（110）的反射光彼此平行和相对。