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1. 发明授权

US4968136A Ring laser gyro and magnetic mirror therefor 失效
标题翻译：环形激光陀螺仪和磁性镜
公开(公告)号：US4968136A
公开(公告)日：1990-11-06
申请号：US239724
申请日：1988-09-02
申请人： Wah L. Lim , V. Warren Biricik , Samuel J. Holmes , Frank R. Nakatsukasa , Joseph M. Bresman , Harley A. Perkins , Michael S. Perlmutter , Henry T. Minden
发明人： Wah L. Lim , V. Warren Biricik , Samuel J. Holmes , Frank R. Nakatsukasa , Joseph M. Bresman , Harley A. Perkins , Michael S. Perlmutter , Henry T. Minden
IPC分类号： G01C19/66 , G02F1/09 , H01S3/083
CPC分类号： H01S3/083 , G01C19/661 , H01S3/0835
摘要： A laser gyroscope is formed as a sealed, unitary assembly of mirrors optically contacted to a monolithic gyro block without any means, such as Brewster windows, for isolating the laser plasma from any of the mirrors. The mirrors are fabricated with hard multilayer dielectric films which can withstand plasma exposure. A magnetic mirror utilizing the transverse Kerr effect to separate the frequencies of counter-propagating beams, and to avoid lock-in, includes a Ni-Fe alloy layer over which is directly deposited a thin iron or iron alloy layer to form a rotationally switchable Kerr effect combination. The magnetic field for switching is generated by an electric current developed in two pairs of orthogonally disposed wires embedded in the substrate immediately below the iron and Ni-Fe alloy layers. A specially designed multilayer dielectric stack is disposed on one of the mirrors, for example over the iron and Ni-Fe alloy layers on the magnetic mirror, and is configured to suppress S mode oscillation in order to limit the gyro to P mode operation.
摘要翻译：形成激光陀螺仪作为密封的单一组件的反射镜，其与诸如布鲁斯特（Brewster）窗口无任何方式光学接触单片陀螺仪块，用于将激光等离子体与任何反射镜隔离。反射镜由可以承受等离子体暴露的硬质多层介质膜制成。利用横向克尔效应来分离反向传播光束的频率并避免锁定的磁镜包括Ni-Fe合金层，在其上直接沉积薄铁或铁合金层以形成可旋转切换的克尔效果组合。用于切换的磁场由在正下方的铁和Ni-Fe合金层内嵌入基板中的两对垂直布置的电线产生的电流产生。特别设计的多层电介质叠层设置在一个反射镜上，例如在磁反射镜上的铁和Ni-Fe合金层上，并且被配置为抑制S模式振荡，以将陀螺仪限制为P模式操作。

2. 发明授权

US5137358A Ring laser gyro having two magnetic mirrors 失效
标题翻译：环形激光陀螺仪有两个磁性镜
公开(公告)号：US5137358A
公开(公告)日：1992-08-11
申请号：US651717
申请日：1991-02-05
申请人： Harley A. Perkins
发明人： Harley A. Perkins
IPC分类号： G01C19/68 , H01S3/083
CPC分类号： G01C19/68 , H01S3/083
摘要： Method and apparatus for switchably controlling the bias of a ring laser angular rate sensor using two switchably controllable magnetic mirrors for rate sensor operation away from lock-in regions. For a sensor input rate that is less than a threshold value, a control means switchably energizes each of the magnetic mirrors in a manner such that their respective optical effect is additive, one with the other, for biasing the rate sensor at a first desired operating point. For a sensor input rate that is at least equal to the threshold value, the control means switchably energizes each of the magnetic mirrors in a manner such that their respective optical effect is subtractive, one from the other, for biasing the rate sensor at a second desired operating point.
摘要翻译：用于使用两个可切换可控的磁反射镜来切换地控制环形激光角速度传感器的偏置的方法和装置，用于将速率传感器操作远离锁定区域。对于小于阈值的传感器输入速率，控制装置以这样一种方式切换地激励每个磁反射镜，使得它们各自的光学效应是相加的，彼此相加，用于在第一期望的操作下偏置速率传感器点。对于至少等于阈值的传感器输入速率，控制装置以使得它们各自的光学效应相减的方式切换地激励每个磁反射镜，用于彼此偏移，用于将速率传感器偏置在第二位置所需工作点。

3. 发明授权

US4899346A Path length control system for magnetic mirror dithered ring laser gyros 失效
标题翻译：磁光镜抖动环激光陀螺仪路径长度控制系统
公开(公告)号：US4899346A
公开(公告)日：1990-02-06
申请号：US146443
申请日：1988-01-21
申请人： Harley A. Perkins
发明人： Harley A. Perkins
IPC分类号： G01C19/66 , H01S3/083
CPC分类号： G01C19/665 , H01S3/083
摘要： Path length error is computed from the output frequencies for the two states of magnetization of the magnetic mirror. The path length error signal is used to adjust the location of a path length control mirror to drive the path length error signal to zero. A table is provided for computing the path length control error signal for different regions in the graph of frequency versus gyro angular rate. In effect, the error signal is the difference between a reference frequency which depends on the temperature of the laser structure and an average of the output frequencies corresponding to the two magnetization states of the magnetic mirror.
摘要翻译：路径长度误差是从磁反射镜的两种磁化状态的输出频率计算的。路径长度误差信号用于调整路径长度控制镜的位置，以将路径长度误差信号驱动为零。提供了一个表，用于计算频率与陀螺角速率图中不同区域的路径长度控制误差信号。实际上，误差信号是取决于激光器结构的温度的参考频率和对应于磁性镜的两个磁化状态的输出频率的平均值之间的差。

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