公开(公告)号：US5168539A

公开(公告)日：1992-12-01

申请号：US800041

申请日：1991-11-29

申请人： Hidehiko Negishi ,  Yoshinori Takeuchi ,  Yukio Kasahara ,  Yoshihiko Honjoya

发明人： Hidehiko Negishi ,  Yoshinori Takeuchi ,  Yukio Kasahara ,  Yoshihiko Honjoya

IPC分类号： G01C19/72 ,  G02B6/44

CPC分类号： G02B6/4457 ,  G01C19/722

摘要： A fiber-optic coil for use as the sensor loop of a fiber-optic gyroscope includes a first optical fiber segment wound as radially successive coiled layers around a coil bobbin in a first region thereof, and a second optical fiber segment wound as radially successive coiled layers around the coil bobbin in an axially adjacent second region thereof. The first and second optical fiber segments are joined to each other through a longitudinal middle portion, which is positioned in the radially innermost coiled layers of the first and second optical fiber segments adjacent to a longitudinal center of said coil bobbin. Each of the first and second optical fiber segments is wound in alternate axial directions in the radially successive coiled layers. The first and second optical fiber segments may be integrally joined to each other by the longitudinal middle portion, or may be separate from, but joined to, each other by a depolarizer across the longitudinal middle portion.

公开(公告)号：US5285257A

公开(公告)日：1994-02-08

申请号：US29281

申请日：1993-03-08

申请人： Hidehiko Negishi ,  Yoshinori Takeuchi ,  Yuko Takei ,  Yoshihiko Honjoya

发明人： Hidehiko Negishi ,  Yoshinori Takeuchi ,  Yuko Takei ,  Yoshihiko Honjoya

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： An optic rotation sensing apparatus includes a light source emitting light. The light emitted from the light source is transmitted to a sensing loop which provides a phase difference between opposite-direction light waves in response to a rotation. Return light outputted from the sensing loop is transmitted to a photodetector. A device modulates a phase of light propagating in the sensing loop. Another device depolarizes light propagating in the sensing loop. The invention further controls and processes an output signal representing the output of the photodetector at a phase at which a level of an AM noise component of the output signal is minimized.

摘要翻译： 光学旋转感测装置包括发光的光源。 从光源发射的光被传送到感测回路，该感测回路响应于旋转而在相反方向的光波之间提供相位差。 从感测回路输出的返回光被发送到光电检测器。 器件调制在感测回路中传播的光的相位。 另一种器件使传感回路中传播的光去极化。 本发明进一步控制和处理表示输出信号的AM噪声分量的电平最小化的相位处的光电检测器的输出的输出信号。