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1. 发明专利

JPS62117146A Optical head 失效
标题翻译：光学头
公开(公告)号：JPS62117146A
公开(公告)日：1987-05-28
申请号：JP25699385
申请日：1985-11-16
申请人： Fuji Elelctrochem Co Ltd
发明人： NAKANO TAKAYUKI
IPC分类号： G11B7/09 , G02B7/28 , G11B7/135
摘要： PURPOSE: To miniaturize remarkably the titled head by using two double- refraction members so as to separate a reflected luminous flux and an incident luminous flux, separating the reflected luminous flux further into two luminous fluxes and giving them respectively to a track error detection and a focus error detection photodetector.
CONSTITUTION: The 2nd double refraction member 40 is fitted to a position where the reflected luminous flux L
2 from an optical disc 32 is emitted from the 1st double refraction member 36. The 2nd double refraction member 40 is fitted so that the C axis face is turned to the C axis face of the 1st double refraction member 36 by nearly 45°. A light shield edge 42 shielding a part of the reflected luminous flux L
2 is provided at the focus of the reflected luminous flux L
2 , that is, the bonding face between the 1st double refraction member 36 and the 2nd double refraction member 40. The photodetector 44 for track error detection and the photodetector 46 for focus error detection are provided to the end face of the 2nd double refraction member 40. The two photodetectors 44, 46 are fitted to a position receiving luminous fluxes separated from then reflected luminous flux L
2 by the 2nd double refraction member 40.
COPYRIGHT: (C)1987,JPO&Japio
摘要翻译：目的：通过使用两个双折射构件显着地使标题头小型化，以分离反射的光通量和入射光通量，将反射的光束进一步分成两个光束，并分别给出轨道误差检测和聚焦误差检测光电探测器。构成：将第二双折射构件40装配到来自光盘32的反射光束L2从第一双折射构件36发射的位置。第二双折射构件40被配合成使得C轴面被转动在第一双折射构件36的C轴面上靠近45度。遮光一部分反射光束L2的遮光边缘42设置在反射光束L2的焦点处，即接合面在第一双折射构件36和第二双折射构件40之间。用于轨道误差检测的光电检测器44和用于聚焦误差检测的光电检测器46设置在第二双折射构件40的端面。两个光电检测器44,46 被配合到由第二双折射构件40接收与之反射的光束L2分离的光束的位置。

2. 发明专利

JPS61113003A Dielectric multilayered film polarizer 失效
标题翻译：电介质多层膜极化器
公开(公告)号：JPS61113003A
公开(公告)日：1986-05-30
申请号：JP23591084
申请日：1984-11-08
申请人： Fuji Elelctrochem Co Ltd
发明人： NAKANO TAKAYUKI , UMEZAWA HIROMITSU , SUZUKI SEIZO
IPC分类号： G02B5/30
摘要： PURPOSE: To improve a quenching ratio greatly by combining a triangular and a parallelogram prisms, forming a polarization splitting surface of a dielectric multilayered film on the cemented surface of the both, and setting the angle of incidence of incident light on the polarization splitting surface so that the quenching ratio of reflected light is maximum.
CONSTITUTION: The prism 10 constituted by cementing the triangular prism 12 which has the dielectric multilayered film on its slanting surface to the parallelogram prism is arranged slanting by an angle β to an optical axis. The incident light L
1 parallel to the optical axis is not perpendicular to an incidence surface 20, but refracted at some angle and incident on the polariza tion splitting surface 16 at an angle α. Consequently, a P wave component is transmitted as it is, but an S wave component is reflected as shown by L
2 , which is reflected by a total reflecting surface 18 facing the polarization splitting surface 16 and projected from a projection surface 22 as projection light L
3 in the same direction with the incident light. The angle α is adjusted so that the quenching ratio of the reflected light L
2 is maximum, and then the P wave component in the projection light L
3 is a little, thereby realizing the superior quenching ratio.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过组合三角形和平行四边形棱镜来大大提高淬火比，在两者的胶合表面上形成电介质多层膜的偏振分离表面，并将入射光的入射角设定在偏振分束面上反射光的淬灭比最大。结构：将倾斜表面上具有电介质多层膜的三角棱镜12固定到平行四边形棱镜构成的棱镜10被布置成与光轴成β角。平行于光轴的入射光L1不垂直于入射表面20，而是以一定角度折射并以α角入射到极化分离表面16上。因此，P波分量被原样传输，但是如L2所示反射S波分量，其由面向偏振分束表面16的全反射面18反射并从投影表面22突出，作为投影光L3 与入射光方向相同。调整角度α使得反射光L2的淬灭比最大，然后投影光L3中的P波分量略小，从而实现了优异的淬灭比。

3. 发明专利

JPS59119316A Optical isolator 失效
标题翻译：光学隔离器
公开(公告)号：JPS59119316A
公开(公告)日：1984-07-10
申请号：JP22844982
申请日：1982-12-27
申请人： Fuji Elelctrochem Co Ltd
发明人： NAKANO TAKAYUKI
IPC分类号： G02B6/42 , G02B27/28 , G02F1/09
CPC分类号： G02F1/093 , G02B6/4209
摘要： PURPOSE:To attain a small-size and light weight further reduce cost, of a device by combining one polarizer with a magnetooptic element which provides polarization on a slanting surface arranged at the complementary angle of a Brewster angle to an optical axis. CONSTITUTION:Light L12 reflected by an end surface of an optical fiber 5 passes through the polarizer 1 in the opposite direction as shown by B to enter the transmission surface 13 of the magnetooptic element 10. The light is influenced therein by an external magnetic field H and its plane of polarization rotates counterclockwise in regard to its optical axis; and the light propagates while reflected repeatedly by a reflecting film 14. Linear polarized light reaching the slanting surface 12 while the plane of polarization rotates by 45 deg. has the plane of polarization rotated by 90 deg. as compared with light in the forward direction shown by A and is reflected by the slanting surface 12 which provides polarization, so almost no light returns to a semiconductor laser 4. This constitution reduces the size, weight and cost of the optical isolator.
摘要翻译：目的：为了实现小尺寸和轻量化，通过将一个偏振器与磁光元件组合来进一步降低成本，该光学元件在布鲁斯特角的互补角度与光轴布置的倾斜表面上提供极化。构成：由光纤5的端面反射的光L12沿着与B所示相反的方向穿过偏振器1，进入磁光元件10的透射面13.光受到外部磁场H 并且其偏振面相对于其光轴反时针旋转; 并且光在反射膜14反复反射的同时传播。偏振平面旋转45度时到达倾斜面12的直线偏振光。具有偏振面旋转90度。与A所示的向前方向的光相比，被倾斜面12反射，倾斜面12提供极化，所以几乎没有光返回到半导体激光器4.这种结构减小了光隔离器的尺寸，重量和成本。

4. 发明专利

JPS59119315A Optical isolator 失效
标题翻译：光学隔离器
公开(公告)号：JPS59119315A
公开(公告)日：1984-07-10
申请号：JP22844882
申请日：1982-12-27
申请人： Fuji Elelctrochem Co Ltd
发明人： NAKANO TAKAYUKI
IPC分类号： G02B6/42 , G02B27/28 , G02F1/09 , H01S5/00
CPC分类号： G02F1/093 , G02B6/4209
摘要： PURPOSE:To reduce the size and cost of a device by combining one polarizer with a magnetooptic element which has a slanting surface cut at the complementary angle of a Brewster angle on one end surface and performs polarizing operation on the slanting surface. CONSTITUTION:Light L12 reflected by an end surface of an optical fiber 5 passes through the polarizer 11 in the opposite direction shown by B and is made incident to the vertical surface 13 of the magnetooptic element 10. The light is influenced therein by an external magnetic field H and its plane of polarization rotates counterclockwise about an optical axis. Linear polarized light reaching the slanting surface 12 while the plane of polarization rotates by 45 deg. has the plane of polarization rotated by 90 deg. as compared with light A traveling forward. Consequently, the light is reflected by the slanting surface 12 which is cut at the complementary angle of the Brewster angle phi and provides polarization, obtaining reflected light L13. Therefore, almost no light returns to a semiconductor laser 4. Thus, the size and weight of the optical isolator are reduced.
摘要翻译：目的：通过组合一个偏振器与磁光元件相结合来减小设备的尺寸和成本，该光学元件在一个端面上以布鲁斯特角的互补角切割倾斜表面，并在倾斜表面上进行偏振操作。构成：由光纤5的端面反射的光L12沿着与B相反的方向通过偏振片11，并入射到磁光元件10的垂直面13上。光受到外部磁场的影响场H及其偏振平面围绕光轴逆时针旋转。偏光面旋转45度时到达倾斜面12的线偏振光。具有偏振面旋转90度。与光A前进相比。因此，光被倾斜表面12反射，倾斜表面12以布鲁斯特角度phi的互补角切割并提供偏振，获得反射光L13。因此，几乎没有光返回到半导体激光器4.因此，光隔离器的尺寸和重量减小。

5. 发明专利

JPS5954700A Preparation of yig single crystal for optical communication 失效
标题翻译： YIG单晶光学通信的制备
公开(公告)号：JPS5954700A
公开(公告)日：1984-03-29
申请号：JP16456382
申请日：1982-09-21
申请人： Fuji Elelctrochem Co Ltd , Natl Inst For Res In Inorg Mater
发明人： KIMURA SHIGEYUKI , SHINDOU ISAMU , TORII MICHIHIRO , KIHARA MASAO , GOTOU HIROHITO , YURI HIDEAKI , NAKANO TAKAYUKI
IPC分类号： C30B13/00 , C30B13/10 , C30B29/28 , G02F1/09
CPC分类号： C30B13/00 , C30B29/28
摘要： PURPOSE:To obtain the titled single crystal having excellent light transmittance, and uniform light-transmission characteristics throughout nearly the whole length of the obtained single crystal, by adding a bivalent ion of Ca, Zn or Pb to a YIG composition. CONSTITUTION:A composition composed mainly of yttrium-iron garnet, is doped with a bivalent ion of Ca, Zn or Pb. The concentration of the dopant is 0.1X 10 -3.5X10 for Ca and 0.1X10 -2.8X10 for Zn and Pb. The above composition is converted to a single crystal by the travelling solvent floating zone process to obtain the desired YIG single crystal for optical communication.
摘要翻译：目的：通过向YIG组合物中加入Ca，Zn或Pb的二价离子，得到具有优异的透光率的标题单晶，并且在所得单晶的几乎整个长度上具有均匀的透光特性。构成：主要由钇铁石榴石组成的组合物掺杂有Ca，Zn或Pb的二价离子。对于Ca，掺杂剂的浓度为0.1×10 -3 -3.5×10 -3，Zn和Pb的掺杂浓度为0.1×10 -3 -3.8×10 -3。上述组合物通过移动溶剂漂浮区工艺转化为单晶，以获得所需的用于光通信的YIG单晶。

6. 发明专利

JPS61126641A Optical head 失效
标题翻译：光学头
公开(公告)号：JPS61126641A
公开(公告)日：1986-06-14
申请号：JP24756184
申请日：1984-11-22
申请人： Fuji Elelctrochem Co Ltd
发明人： NAKANO TAKAYUKI , UMEZAWA HIROMITSU , SUZUKI SEIZO
IPC分类号： G02B7/04 , G11B7/09
CPC分类号： G11B7/0927 , G11B7/0932
摘要： PURPOSE:To make an optical head small-sized considerably by providing a through-hole in the center of an object lens of the optical head which condenses a laser beam to write and read information on and from an optical disc and providing an actuator for the object lens in the through hole. CONSTITUTION:An annular structure lens is used where a through hole 12 is provided in the center of an object lens 10 which condenses a laser beam 24 from a semiconductor laser as a light source on an optical disc 26 to record or read information. An actuator 14 of the lens 10 is provided in the hole 12. The actuator is constituted with a magnetic circuit consisting of an actuator coil 18 supported by a damper part 16 projected from the upper inside edge of the lens 10 to the inside, a permanent magnet 20 which faces the coil 18 and is arranged on the inside of the coil 18, and a yoke member 22 surrounding the coil 18. The whole of the optical head including the lens 10 is stored in a cylindrical case 27. Thus, the optical head is made small-sized considerably, and the spherical aberration is difficult to occur and a good beam spot is formed because the laser beam passes only the peripheral part of the lens 10.
摘要翻译：目的：通过在光学头的物镜的中心设置通孔，使光头小型化，从而使激光束会聚，从而在光盘上写入和读取信息，并为光盘提供致动器物镜在通孔中。构成：使用环形结构透镜，其中在物镜10的中心设有通孔12，该透镜10将来自半导体激光器的激光束24作为光源聚光在光盘26上以记录或读取信息。透镜10的致动器14设置在孔12中。致动器由磁路构成，该磁路由致动器线圈18构成，致动器线圈18由从透镜10的上部内边缘向内突出的阻尼部分16支撑，永久磁体20面对线圈18并且布置在线圈18的内侧，以及围绕线圈18的磁轭构件22.包括透镜10的整个光学头存储在圆筒形壳体27中。因此，光学由于激光仅通过透镜10的周边部，因此难以大幅度地使头部形成小的球面像差，并且形成良好的光束点。

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