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11. 发明授权

US06744519B2 Methods and apparatus for fiber optic gyroscope dead band error suppression modulation 有权
标题翻译：光纤陀螺死区误差抑制调制方法与装置
公开(公告)号：US06744519B2
公开(公告)日：2004-06-01
申请号：US10135245
申请日：2002-04-30
申请人： Charles H. Lange , Chung-Jen Chen
发明人： Charles H. Lange , Chung-Jen Chen
IPC分类号： G01C1972
CPC分类号： G01C19/726
摘要： According to the preferred exemplary embodiments of the present invention, there is provided a phase jump amplitude and timing controller for suppressing the voltage-dependent errors responsible for the dead band. The phase jump amplitude and timing controller inserts a phase/voltage jump into the feedback signal of the loop closure electronics of the fiber optic gyroscope. The phase/voltage jump is provided at a frequency regular enough to ensure that the fiber optic gyroscope will not have enough time to settle into the dead band before the phase/voltage jump is supplied to the loop closure electronics. By providing a recurring phase/voltage jump with amplitude sufficient to move the signal out of the dead band, the loop closure electronics averages the voltage-dependent errors over the full feedback voltage range. This error averaging process effectively eliminates the voltage-dependent errors that cause the dead band phenomenon and allows the loop closure electronics to sense the actual rate of rotation for the fiber optic gyroscope.
摘要翻译：根据本发明的优选示例性实施例，提供了一种用于抑制负责死区的电压相关误差的相位跳变幅度和定时控制器。相位跳变幅度和时序控制器将相位/电压跳变插入到光纤陀螺仪的闭环电路的反馈信号中。相位/电压跳变以足够的频率提供，以确保光纤陀螺仪在相位/电压跳变提供给闭环电路之前不会有足够的时间来稳定到死区。通过提供具有足以将信号移出死区的振幅的循环相位/电压跳变，闭环电路在整个反馈电压范围内平均电压相关误差。该误差平均过程有效地消除了导致死区现象的电压相关误差，并允许闭环电子装置检测光纤陀螺仪的实际旋转速率。

12. 发明授权

US06285182B1 Electro-optic voltage sensor 有权
标题翻译：电光电压传感器
公开(公告)号：US06285182B1
公开(公告)日：2001-09-04
申请号：US09207371
申请日：1998-12-08
申请人： James N. Blake , Charles H. Lange
发明人： James N. Blake , Charles H. Lange
IPC分类号： G01R3100
CPC分类号： G01R15/24
摘要： A true dV/dt voltage sensor having no need for a ground reference for measurement. The sensor is connected at two places on the electric line to be measured. The voltage wave has a delay between the two places on the line and the difference is sensed and converted into a voltage measurement. Another approach is to connect the sensor at one place on the electric line. This approach has the second connection through a phase delay circuit that has an input connected to the same place. The delay between the one connection and the output of the phase delay circuit is sensed and converted into a voltage measurement. The sensed difference is a voltage, which is applied across a device, such as an electro-optic crystal, an integrated optic circuit (IOC) or a Mach Zehnder interferometer, which is a light medium that has a birefringence or an index of refraction that varies with changes of applied voltage. The variation of birefringence changes the polarization state of the light going through the device. The intensity of at least one polarization of light is detected and converted to an electrical signal. The intensity of the two interfering light beams from the legs of the Mach Zehnder interferometer is a function of the measured voltage. The electrical signal is integrated into a signal indicative of the magnitude of the voltage being measured on the electric line.
摘要翻译：真正的dV / dt电压传感器，不需要测量的接地参考。传感器连接在要测量的电线上的两个位置。电压波在线路上的两个位置之间具有延迟，并且差异被感测并转换成电压测量。另一种方法是将传感器连接在电线的一个位置。该方法具有通过相位延迟电路的第二连接，该相位延迟电路具有连接到相同位置的输入端。相位延迟电路的一个连接和输出之间的延迟被感测并转换成电压测量。所感测到的差异是施加在诸如电光晶体，集成光学电路（IOC）或马赫曾德尔干涉仪之类的器件上的电压，该干涉仪是具有双折射或折射率的光介质，随施加电压的变化而变化。双折射的变化改变了穿过器件的光的偏振状态。光的至少一个极化的强度被检测并转换成电信号。来自马赫曾德干涉仪的腿部的两个干涉光束的强度是测量电压的函数。电信号被集成到指示在电线上测量的电压的大小的信号中。

13. 发明授权

US07366372B2 Waveguide device having improved spatial filter configurations 有权
标题翻译：具有改进的空间滤波器配置的波导装置
公开(公告)号：US07366372B2
公开(公告)日：2008-04-29
申请号：US11364024
申请日：2006-02-27
申请人： Charles H. Lange
发明人： Charles H. Lange
IPC分类号： G02B6/26 , G02B6/42 , G02B6/10
CPC分类号： G02B6/125 , G02B6/126 , G02F1/035 , G02F1/3137
摘要： An optical waveguide device is provided for receiving light that has a guided mode and an unguided mode. The device comprises an optically transmissive substrate having first and second substantially opposite surfaces, an input end, and an output end. An optical waveguide region is disposed within the substrate and extends from the input to the output. A plurality of electrodes is disposed on the first surface at predetermined locations with respect to the waveguide region. The device includes a plurality of optical barriers each disposed proximate one of the first and second surfaces and positioned to block a different optical path of the unguided mode.
摘要翻译：提供一种用于接收具有引导模式和非导向模式的光的光波导装置。该装置包括具有第一和第二基本上相对的表面的光学透射基底，输入端和输出端。光波导区域设置在基板内并从输入端延伸到输出端。多个电极相对于波导区域在预定位置设置在第一表面上。该装置包括多个光学屏障，每个光学屏障设置在第一和第二表面之一附近并且被定位成阻挡非导向模式的不同光路。

14. 发明授权

US07227644B2 Fiber optic gyroscope using a narrowband FBG filter as a wavelength reference 有权
标题翻译：光纤陀螺仪使用窄带FBG滤波器作为波长参考
公开(公告)号：US07227644B2
公开(公告)日：2007-06-05
申请号：US10786143
申请日：2004-02-26
申请人： Scott A. Anson , Charles H. Lange , Thomas C. Greening
发明人： Scott A. Anson , Charles H. Lange , Thomas C. Greening
IPC分类号： G01C19/72
CPC分类号： G01C19/721
摘要： Fiber optic gyroscope architectures that incorporate both (i) a WDM-based wavelength control and (ii) a wavelength reference based on a narrowband fiber Bragg grating (FBG), with the latter component providing significant improvement in the stability of the wavelength reference by calibrating out wavelength errors associated with a WDM-based wavelength control scheme.
摘要翻译：光纤陀螺仪结构包括（i）基于WDM的波长控制和（ii）基于窄带光纤布拉格光栅（FBG）的波长参考，后一个组件通过校准提供了对波长参考的稳定性的显着改进与基于WDM的波长控制方案相关联的波长误差。

15. 发明授权

US5608568A Thin film vanadium oxide spatial light modulators and methods 失效
标题翻译：薄膜氧化钒空间光调制器及方法
公开(公告)号：US5608568A
公开(公告)日：1997-03-04
申请号：US225847
申请日：1994-04-11
申请人： David W. Blodgett , Charles H. Lange , Philip J. McNally , Donald D. Duncan
发明人： David W. Blodgett , Charles H. Lange , Philip J. McNally , Donald D. Duncan
IPC分类号： G02F1/01 , G02F1/19 , H01S5/42
CPC分类号： G02F1/19 , G02F1/0147 , H01S5/423
摘要： Vanadium dioxide (VO.sub.2) based infrared spatial light modulators (SLM) in four embodiments are disclosed:(1) A VO.sub.2 thin film is deposited on a planar diode array. Each diode constitutes a "pixel" of the SLM. Power provided to a diode permits accurate thermal control about the thin film's hysteresis. Initial biasing of the diode array is required to the base of the VO.sub.2 's hysteresis curve.(2) & (3) VO.sub.2 is deposited on a thermoelectric array which can be an array of doped lines of p and n type material or a conductive material between two electrical contacts. The pixels have the ability to both heat and cool the VO.sub.2 film, thereby allowing the array to be operated in a bistable mode. Bistable operation requires external biasing to the center of the VO.sub.2 's hysteresis curve.(4) A VO.sub.2 thin film deposited on a substrate which is spaced a distance, L, from an array of vertical-cavity surface-emitting lasers for heating the VO.sub.2.
摘要翻译：公开了四种实施方案中的基于二氧化钒（VO2）的红外空间光调制器（SLM）：（1）将VO2薄膜沉积在平面二极管阵列上。每个二极管构成SLM的“像素”。提供给二极管的功率允许对薄膜滞后的精确的热控制。二极管阵列的初始偏置要求为VO2滞后曲线的基极。（2）和（3）VO2沉积在热电阵列上，该热电阵列可以是p型和n型材料的掺杂线阵列或两个电触头之间的导电材料。像素具有加热和冷却VO2膜的能力，从而允许阵列以双稳态模式操作。双稳态操作需要外部偏置到VO2的磁滞曲线的中心。（4）沉积在衬底上的VO2薄膜，其与垂直腔表面发射激光器的阵列间隔一段距离L，用于加热VO2。

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