公开(公告)号：US6100943A

公开(公告)日：2000-08-08

申请号：US897987

申请日：1997-07-08

申请人： Nobuaki Koide ,  Yasuyo Matsumoto ,  Yozo Nishiura ,  Kensaku Takada

发明人： Nobuaki Koide ,  Yasuyo Matsumoto ,  Yozo Nishiura ,  Kensaku Takada

IPC分类号： B60K37/02 ,  G02B27/01 ,  G02F1/1335 ,  G02B27/14

CPC分类号： B60K37/02 ,  G02B27/01 ,  G02B27/0101 ,  B60K2350/1064 ,  B60K2350/2052

摘要： A display device for a transportation includes: a display unit displaying a display image on front and rear face sides, the display images displayed on the rear face side being in mirror image relationship with each other; and an optical member for inverting the display image displayed on the rear face side; wherein the display image displayed on the front face side is directly seen by a driver and the display image displayed on the rear face side is inverted by the optical member, so as to see in the same direction of the display image displayed on the front face side. The above display unit may be constituted by a light source having plural color spectra; an attenuation filter in which a transmittance for light emitted from the light source can be partly changed by an external signal; and a transparent light guide plate which guides light emitted from the light source to at least one of front and rear faces of the attenuation filter.

摘要翻译： 用于运输的显示装置包括：显示单元，其在前侧和后面侧显示显示图像，显示在背面侧的显示图像彼此成镜像关系; 以及光学构件，用于反转显示在背面侧的显示图像; 其中显示在正面侧的显示图像被驾驶员直接看到，并且通过光学构件将显示在背面侧的显示图像反转，以便在与正面上显示的显示图像相同的方向上看到 侧。 上述显示单元可以由具有多个色谱的光源构成; 衰减滤波器，其中从光源发射的光的透射率可以通过外部信号部分地改变; 以及将从光源发射的光引导到衰减滤波器的前表面和后表面中的至少一个的透明导光板。

公开(公告)号：US5444533A

公开(公告)日：1995-08-22

申请号：US114095

申请日：1993-08-31

申请人： Yozo Nishiura ,  Takaki Iwashita ,  Akihiro Ooka

发明人： Yozo Nishiura ,  Takaki Iwashita ,  Akihiro Ooka

IPC分类号： G02B6/00 ,  G01C19/72 ,  H01S3/07 ,  H01S3/083

CPC分类号： G01C19/721

摘要： Conventional fiber-optic gyroscopes were provided with an independent photodetector for detecting interfering beams. The existence of the independent photodetector required two beam dividing-and-combining devices for equalizing the experiences of the clockwise-spreading beams and the counterclockwise-spreading beams. Curtailment of an expensive beam dividing-and-combining device is desirable for reducing the cost of gyroscopes. This invention dispenses with the independent photodetector. Instead of the independent photodetector, the light source itself or the monitoring photodiode detects the interfering beams by the change of driving current, applied voltage or photocurrent. Elimination of the independent photodetector saves one beam dividing-and-combining device by equalizing the path of the progressing beams to the path of the regressing beams. Optimum light sources, interposition of polarizer, position of depolarizer and use of birefringent material as polarizer are explained.

摘要翻译： 传统的光纤陀螺仪设有独立的光电检测器，用于检测干涉光束。 独立光电检测器的存在需要两个光束分割和组合装置，用于均衡顺时针扩展光束和逆时针扩展光束的经验。 昂贵的光束分割和组合装置的缩减对于降低陀螺仪的成本是期望的。 本发明省去了独立的光电探测器。 代替独立光电检测器，光源本身或监控光电二极管通过驱动电流，施加电压或光电流的变化来检测干扰光束。 消除独立的光电探测器通过将前进光束的路径均衡到回归光束的路径来节省一个光束分割和合成装置。 解释了最佳光源，偏振器的插入，去偏振器的位置以及双折射材料作为偏振器的用途。

公开(公告)号：US5245407A

公开(公告)日：1993-09-14

申请号：US748541

申请日：1991-08-22

申请人： Yozo Nishiura ,  Takaki Iwashita

发明人： Yozo Nishiura ,  Takaki Iwashita

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： A fiber-optic gyroscope having a depolarizer installed near the fiber coil and a polarizer disposed in the optical path before the light is divided in two partial lights to avoid the fluctuation of the light power passing reversely through the polarizer induced by the rotation of the polarization plane of the light. However, since the light emitting device emits a linearly polarized light, the light power first passing through the polarizer will fluctuate by the rotation of the polarization plane. This invention adds another depolarizer between the light emitting device and the polarizer in order to kill such a fluctuation.

公开(公告)号：US5999296A

公开(公告)日：1999-12-07

申请号：US864623

申请日：1997-05-28

申请人： Yozo Nishiura

发明人： Yozo Nishiura

IPC分类号： G01S1/70 ,  G08G1/0967 ,  H04B10/00 ,  B60Q1/00

CPC分类号： G08G1/096716 ,  G01S1/70 ,  G08G1/096758 ,  G08G1/096783 ,  H04B10/1143

摘要： In an optical head for optical beacon, a prism 5 is arranged immediately after light emitting elements 1 of an optical head 10 in light radiating directions of the light emitting elements 1, so that the paths along which light rays travel immediately after the radiation can be curved by the prism 5. As a result of this configuration, if the index of refraction of a material of which the prism 5 is made and the angle of a slope of the prism 5 are set to proper values, the light rays can be injected from the prism 5 to an optical head 10 on the side of a light receiving element 2 in arbitrary directions. Further, a surface 21 of a body 13 in which a transmission window 14 is formed is so shaped as to be inclined backward with respect to the travelling direction of an automobile from an upper edge a to a lower edge b. An image of the surface 21 of the body 13 in which the transmission window 14 is formed is not mirrored on a windshield glass 20 as long as the image is that of a surface portion below the upper edge a excluding the upper edge a. Other part of the body 13 than the surface 21 in which the transmission window 14 is formed is subjected to a surface treatment for preventing the mirroring of an image.

摘要翻译： 在用于光信标的光学头中，棱镜5在发光元件1的光辐射方向上紧接在光学头10的发光元件1之后，使得光线在辐射之后立即行进的路径可以是 作为该结构的结果，如果将棱镜5的材料的折射率和棱镜5的斜率的角度设置为适当的值，则可以注射光线 从棱镜5到光接收元件2的任意方向的光学头10。 此外，其中形成有透光窗14的本体13的表面21被成形为相对于汽车的行进方向从上边缘a到下边缘b向后倾斜。 只要图像是除了上边缘a之外的上边缘a以下的表面部分的图像，则形成有透射窗14的主体13的表面21的图像不会被镜像在挡风玻璃20上。 经过形成透射窗14的表面21的主体13的其他部分进行表面处理以防止图像的镜像。

公开(公告)号：US5386484A

公开(公告)日：1995-01-31

申请号：US118809

申请日：1993-09-09

申请人： Akihiro Ooka ,  Kenji Kawamura ,  Yozo Nishiura ,  Katsuaki Itoh ,  Takaki Iwashita ,  Yasuhiko Nishi ,  Noritaka Kuroda ,  Hayato Hasegawa

发明人： Akihiro Ooka ,  Kenji Kawamura ,  Yozo Nishiura ,  Katsuaki Itoh ,  Takaki Iwashita ,  Yasuhiko Nishi ,  Noritaka Kuroda ,  Hayato Hasegawa

IPC分类号： G01C19/72 ,  G02B6/10 ,  G02B6/34 ,  G02B6/44 ,  G02B6/17

CPC分类号： G02B6/274 ,  G01C19/722 ,  G02B6/105 ,  G02B6/276 ,  G02B6/4457

摘要： An optical fiber type polarizer comprises a first optical fiber constituted by a birefringent optical fiber wound at a predetermined winding radius and having winding start and end fixed to each other by an adhesive, the first optical fiber having short extra portions respectively extending from the winding start and end, and the length of each of the short extra porions being at least as small as the predetermined winding radius. The optical fiber type polarizer further comprises a second optical fiber spliced to one of the short extra portions of the first optical fiber, and a third optical fiber spliced to the other of the short extra portions of the first optical fiber.

摘要翻译： 一种光纤型偏振器包括：由双折射光纤构成的第一光纤，该双折射光纤以预定的绕组半径缠绕并且具有通过粘合剂彼此固定的卷绕开始和端部，所述第一光纤具有分别从卷绕开始延伸的多个额外部分 并且结束，并且每个短的额外部分的长度至少与预定的绕组半径一样小。 光纤型偏振器还包括接合到第一光纤的短额外部分之一的第二光纤，以及与第一光纤的短额外部分中的另一个接合的第三光纤。

公开(公告)号：US5365339A

公开(公告)日：1994-11-15

申请号：US2060

申请日：1993-01-08

申请人： Yozo Nishiura ,  Yasuhiko Nishi

发明人： Yozo Nishiura ,  Yasuhiko Nishi

IPC分类号： G01C19/72 ,  G02B6/34 ,  G01C19/64

CPC分类号： G01C19/721

摘要： A fiber-optic gyroscope has a polarizer, a fiber coil and couplers. A light beam is polarized, divided into two beams and introduced into the fiber coil. Two depolarizers are provided; one between a light source and a polarizer, the other between the fiber coil and a coupler. To clarify the condition for avoiding interference between two depolarizers is a purpose of this invention. Four birefringent materials A, B C and D should satisfy inequalities;.vertline.P.sub.a B.sub.a L.sub.a +P.sub.b B.sub.b L.sub.b +P.sub.o B.sub.o L.sub.o +P.sub.d B.sub.d L.sub.d .vertline.-B.sub.5 L.sub.5 >Cwhere P.sub.a, P.sub.b, P.sub.o, and P.sub.d are triplet factors which take one of -1, 0 or +1 independently, B.sub.a, B.sub.b, B.sub.o and B.sub.d are birefringence and L.sub.a, L.sub.b, L.sub.o and L.sub.d are lengths of A, B, D and D. B.sub.5 L.sub.5 is extra birefringency of the fiber coil or couplers.

摘要翻译： 光纤陀螺仪具有偏振器，光纤线圈和耦合器。 光束被极化，分成两束并引入光纤线圈。 提供两种去极化剂; 一个在光源和偏振器之间，另一个在光纤线圈和耦合器之间。 为了阐明避免两个消偏振器之间的干扰的条件是本发明的目的。 四种双折射材料A，B C和D应满足不等式; | PaBaLa + PbBbLb + PoBoLo + PdBdLd | -B5L5> C其中Pa，Pb，Po和Pd是独立地取-1,0或+1之一的三重因子，Ba，Bb，Bo和Bd是双折射和La， Lb，Lo和Ld是A，B，D和D的长度.B5L5是纤维线圈或耦合器的额外双折射率。

公开(公告)号：US5455676A

公开(公告)日：1995-10-03

申请号：US201459

申请日：1994-02-24

申请人： Yozo Nishiura ,  Yasuhiko Nishi

发明人： Yozo Nishiura ,  Yasuhiko Nishi

IPC分类号： G01C19/72

CPC分类号： G01C19/72

摘要： An AC component of the photodetector includes two quasi-sine waves in a cycle of phase-modulation. T.sub.1 and T.sub.2 are time lengths of the quasi-sine waves. When a fiber coil is rotating, T.sub.1 differs from T.sub.2. The difference between T.sub.1 and T.sub.2 is in proportion to an angular velocity of the fiber coil. This invention obtains the angular velocity by measuring time durations T.sub.1, T.sub.2 or both T.sub.1 and T.sub.2. Zero-crossing detection defines the moments of the beginning and the end of T.sub.1 and T.sub.2. Since this gyroscope depends on the measurement of time lengths, it is fully immune from the fluctuation of light power due to the light source, or the fluctuation of the gain in the electric circuit.

摘要翻译： 光电检测器的AC分量在相位调制周期中包括两个准正弦波。 T1和T2是准正弦波的时间长度。 当光纤线圈旋转时，T1与T2不同。 T1和T2之间的差异与纤维线圈的角速度成比例。 本发明通过测量时间T1，T2或T1和T2两者获得角速度。 过零检测定义T1和T2的开始和结束的时刻。 由于该陀螺仪取决于时间长度的测量，所以完全免受光源引起的光功率波动或电路中增益的波动的影响。

公开(公告)号：US5335064A

公开(公告)日：1994-08-02

申请号：US911612

申请日：1992-07-10

申请人： Yozo Nishiura ,  Yasuhiko Nishi

发明人： Yozo Nishiura ,  Yasuhiko Nishi

IPC分类号： G01C19/72 ,  G02B6/00 ,  G02B6/34 ,  G01C19/64

CPC分类号： G02B6/2713 ,  G01C19/721 ,  G02B6/2726 ,  G02B6/274 ,  G02B6/2766

摘要： A fiber-optic gyroscope having a single mode fiber coil for sensing the rotation suffers from drift or fluctuation of scale factor of the output signals owing to spontaneous rotation of polarization of beams propagated in the fiber coil. Thus, two depolarizers are required in front of and at the back of the polarizer to avoid the fluctuation. The depolarizer of prior art consists of two birefringent materials twistedly connected with each other at an about 45.degree. inclination angle between the principal axes of one and the principal axes of the other. A conventional fiber-type depolarizer has two polarization maintaining fibers connected together. A new, simplified depolarizer is proposed. The depolarizer is built by gluing a polarization maintaining fiber to an end of the polarizer with an about 45.degree. inclination angle between the principal axes of the fiber and the principal axes of the polarizer. The depolarizer allows us to dispense with one polarization maintaining fiber and spare the operation for connecting fibers by once.

摘要翻译： 具有用于感测旋转的单模光纤线圈的光纤陀螺仪由于在光纤线圈中传播的光束的偏振的自发旋转而遭受输出信号的比例因子的漂移或波动。 因此，在偏振器的前面和后面需要两个去偏振器以避免波动。 现有技术的消偏振器由两个双折射材料组成，两个双折射材料在一个主轴和另一个的主轴之间以大约45°的倾斜角相互扭曲地连接。 常规的纤维型去偏振器具有连接在一起的两个保偏光纤。 提出了一种新的，简化的消偏振器。 去偏振器是通过将偏振保持光纤粘合到偏振器的端部，其中光纤的主轴和偏振器的主轴之间具有大约45°的倾角。 消偏器使我们能够省去一个保偏光纤，并将光纤连接一次。

公开(公告)号：US4517280A

公开(公告)日：1985-05-14

申请号：US548591

申请日：1983-11-03

申请人： Kenji Okamoto ,  Yoshikazu Nishiwaki ,  Shunji Matsuoka ,  Yozo Nishiura

发明人： Kenji Okamoto ,  Yoshikazu Nishiwaki ,  Shunji Matsuoka ,  Yozo Nishiura

IPC分类号： G02B6/124 ,  G03C5/00

CPC分类号： G02B6/124

摘要： A process for making a diffraction grating pattern on a substrate is disclosed. The process comprises the steps of coating the substrate with first and second materials, with one of the materials defining a selected area for the diffraction grating pattern, and the other material covering the substrate while forming a window at that portion of the substrate where the diffraction grating is desired. The window portion of the substrate is then etched, and the first and second materials are stripped off in order to leave behind the diffraction grating pattern at the desired location of the substrate.

摘要翻译： 公开了一种在衬底上制作衍射光栅图案的工艺。 该方法包括以下步骤：用第一和第二材料涂覆基材，其中一种材料限定用于衍射光栅图案的选定区域，并且另一种材料覆盖基板，同时在基板的该部分处形成窗口，其中衍射 需要光栅。 然后蚀刻衬底的窗口部分，并且剥离第一和第二材料以便在基底的期望位置留下衍射光栅图案。

公开(公告)号：US6011518A

公开(公告)日：2000-01-04

申请号：US900333

申请日：1997-07-25

申请人： Hiroshi Yamagishi ,  Masahiro Tokunaga ,  Yozo Nishiura

发明人： Hiroshi Yamagishi ,  Masahiro Tokunaga ,  Yozo Nishiura

IPC分类号： H01Q1/32 ,  H01Q9/04 ,  H01Q9/28 ,  H01Q21/30 ,  H01Q23/00 ,  H01Q3/02

CPC分类号： H01Q23/00 ,  H01Q1/3266 ,  H01Q21/30 ,  H01Q9/0407 ,  H01Q9/285

摘要： In the vehicle antenna, a GPS antenna, a radio wave beacon antenna for VICS/automatic rate, and an optical beacon antenna are incorporated into between the mirror of a room mirror and a cover and they are united together into an integrated body. The vehicle antenna is structured such that it is allowed to transmit and receive signals with respect to a GPS, a VICS/automatic rate beacon, and an optical beacon through the windshield of a vehicle. This structure eliminates the need to install the respective antennas of the vehicle antenna onto a vehicle body and an instrumental panel, thereby being able to improve the appearance of the interior of the vehicle. Also, since the vehicle antenna is incorporated in the room mirror, the vehicle antenna is not visible directly to the eyes of a driver and is kept from reflecting its shade into the windshield to thereby prevent interference with the driving operation of the driver.

摘要翻译： 在车载天线中，将GPS天线，用于VICS /自动速率的无线电波信标天线和光信标天线结合到房间反射镜和盖子的反射镜之间，并且它们结合在一起成为一体。 车辆天线被构造成允许相对于GPS，VICS /自动速率信标和通过车辆的挡风玻璃的光学信标发送和接收信号。 这种结构消除了将车辆天线的各个天线安装到车身和仪表板上的需要，从而能够改善车辆内部的外观。 此外，由于车载天线被并入室内反射镜，车辆天线不能直接看到驾驶员的眼睛，并且不会将其阴影反射到挡风玻璃中，从而防止对驾驶员的驾驶操作的干扰。