公开(公告)号：US5559916A

公开(公告)日：1996-09-24

申请号：US352258

申请日：1994-12-08

申请人： Kazuhiko Terao ,  Hidetoku Iida ,  Takeyasu Nakayama ,  Toshiya Kubo ,  Jiro Horigome ,  Yoshihiro Matsuoka ,  Nobutoshi Takeda ,  Tohru Mizuhashi

发明人： Kazuhiko Terao ,  Hidetoku Iida ,  Takeyasu Nakayama ,  Toshiya Kubo ,  Jiro Horigome ,  Yoshihiro Matsuoka ,  Nobutoshi Takeda ,  Tohru Mizuhashi

IPC分类号： B24B19/00 ,  B24B19/22 ,  G02B6/38 ,  G02B6/00 ,  G02B6/36

CPC分类号： B24B19/226 ,  G02B6/3822 ,  G02B6/3863

摘要： The end face of an optical fiber assembly consisting of an optical fiber s and a ferrule f is polished to form a conical surface with oblique faces Fp1 and Fp2 such that, central axis Ap of the conical surface makes an inclination of 8.degree. with respect to the optical axis L of the optical fiber s, top Ft of the conical surface coincides with the optical axis L of the optical fiber s, and has a taper angle of 2.degree.. Thereafter, the optical fiber assembly is further polished to form an oblique convex spherical surface at the end face such that, the central axis of the oblique convex spherical surface makes an inclination of 8.degree. with respect to the optical axis L of the optical fiber s. Due to this, insertion loss and light reflected back to the source is stabilized and minimized.

摘要翻译： 由光纤和套圈f组成的光纤组件的端面被抛光以形成具有倾斜面Fp1和Fp2的锥形表面，使得锥形表面的中心轴线A相对于 光纤的光轴L，圆锥面的顶面Ft与光纤s的光轴L重合，锥角为2°。 此后，光纤组件被进一步抛光，以在端面形成斜凸球面，使得倾斜凸球面的中心轴相对于光纤的光轴L倾斜8° 。 由此，反射回源的插入损耗和光被稳定并最小化。

公开(公告)号：US5463709A

公开(公告)日：1995-10-31

申请号：US317072

申请日：1994-10-03

申请人： Kazuhiko Terao ,  Hidetoku Iida ,  Takeyasu Nakayama ,  Toshiya Kubo ,  Jiro Horigome ,  Yoshihiro Matsuoka ,  Nobutoshi Takeda ,  Tohru Mizuhashi

发明人： Kazuhiko Terao ,  Hidetoku Iida ,  Takeyasu Nakayama ,  Toshiya Kubo ,  Jiro Horigome ,  Yoshihiro Matsuoka ,  Nobutoshi Takeda ,  Tohru Mizuhashi

IPC分类号： G02B6/36 ,  B24B19/00 ,  B24B19/22 ,  G02B6/02 ,  G02B6/25

CPC分类号： B24B19/226

摘要： End face of a ferrule 100 is polished to form a conical surface 3 such that, central axis Ap of said conical surface 3 makes an inclination of 8.degree. with respect to central axis L of optical fiber insertion hole 4, top 3t of said conical surface 3 coincides with said central axis L and has a taper angle of 2.degree.. Because of this, while polishing an end of a optical fiber inserted and fixed inside said optical fiber insertion hole 4, a well balanced oblique spherical surface can be formed and the non-coincidence of the center of said oblique convex surface with the point where said oblique convex surface intersect with the optical axis of said optical fiber can be prevented.

摘要翻译： 套圈100的端面被抛光以形成锥形表面3，使得所述锥形表面3的中心轴线A相对于光纤插入孔4的中心轴线L倾斜8°，所述锥形表面的顶部3t 3与所述中心轴L重合，并具有2°的锥角。 因此，在对插入固定在光纤插入孔4内的光纤的端部进行研磨的同时，可以形成良好平衡的斜面球面，并且可以形成所述倾斜凸面的中心与所述倾斜凸面的中心的不一致 可以防止与所述光纤的光轴相交的倾斜凸面。

公开(公告)号：US5245684A

公开(公告)日：1993-09-14

申请号：US930108

申请日：1992-08-13

申请人： Kazuhiko Terao ,  Takeyasu Nakayama

发明人： Kazuhiko Terao ,  Takeyasu Nakayama

IPC分类号： G02B6/26 ,  B24B19/22 ,  G02B6/32 ,  G02B6/38

CPC分类号： G02B6/3822 ,  B24B19/226 ,  G02B6/3863 ,  G02B6/3877 ,  G02B6/3821 ,  G02B6/3875 ,  G02B6/3894

摘要： An optical fiber assembly is disclosed, which permits reduction of light reflection, suppression of reflected return light and reduction of connection loss and also facilitates its manufacture. The optical fiber assembly 10 comprises an optical fiber 18 and a ferrule 12 with an end taper and mounted on an end portion of the optical fiber. The end face of the optical fiber 18 and the end face of the ferrule 12 are constituted by a convex spherical surface S1 with the center P0 thereof at a position spaced apart from the center line L0 of the optical fiber 18. The radial line L1 passing through the center P1 of the optical fiber and the center P0 makes an angle .theta.' of 6 to 12 degrees with respect to the center line L0, the radius of curvature is 50 to 70 mm, and the symmetricity angle .DELTA..theta. is 0.1 degree or less.

公开(公告)号：US6155722A

公开(公告)日：2000-12-05

申请号：US228096

申请日：1999-01-11

申请人： Masanori Nonomura ,  Satoshi Takehana ,  Takeyasu Nakayama ,  Ikuo Maeda ,  Akihiro Masuda ,  Takashi Kato

发明人： Masanori Nonomura ,  Satoshi Takehana ,  Takeyasu Nakayama ,  Ikuo Maeda ,  Akihiro Masuda ,  Takashi Kato

IPC分类号： G02B6/36 ,  G02B6/38 ,  G02B6/40

CPC分类号： G02B6/3865 ,  G02B6/3833 ,  G02B6/3835 ,  G02B6/3885 ,  G02B6/3878

摘要： A twin-core ferrule structure is provided which is miniaturized in size, facilitated for accurate positioning the optical axes of two optical fibers, and improved both in degree of freedom of determining a shape and in high-volume productivity. The twin-core ferrule 21 comprises a cylindrical sleeve 22 having a first optical fiber element fitting hole 23 provided in the front region of a circular cylindrical body thereof to extend along the center axis of the same, a second optical fiber element fitting hole 24 provided in the same to extend eccentric to the center axis of the circular cylindrical body and in parallel with the first optical fiber element fitting hole 23, and an eccentric cylindrical hole 25 provided in the rear region of the circular cylindrical body to extend with the center axis coinciding with the center line between the first and second optical fiber element fitting holes 23 and 24, into which an optical fiber core is fitted, wherein the cylindrical sleeve 22 is monolithically formed by injection molding of a metal material.

摘要翻译： 提供了一种双芯套圈结构，其尺寸小型化，有助于精确定位两根光纤的光轴，并且在形状确定和大批量生产率方面均有改善。 双芯套圈21包括圆柱形套筒22，其具有设置在其圆筒体的前部区域中的沿其中心轴线延伸的第一光纤元件配合孔23，设置有第二光纤元件配合孔24 在圆筒体的中心轴线上偏心地延伸并与第一光纤元件嵌合孔23平行地设置偏心圆筒孔25，该偏心圆筒孔25设置在圆筒体的后部区域中以与中心轴线 与装配有光纤芯的第一和第二光纤元件装配孔23和24之间的中心线重合，其中圆柱形套筒22通过注射成型金属材料而整体形成。