Natural gas detection apparatus and method operable in a moving vehicle
    1.
    发明授权
    Natural gas detection apparatus and method operable in a moving vehicle 失效
    在移动车辆中可操作的天然气检测装置和方法

    公开(公告)号:US5946095A

    公开(公告)日:1999-08-31

    申请号:US812281

    申请日:1997-03-06

    IPC分类号: G01M3/22 G01N21/35 G01B9/02

    摘要: A natural gas detection system is provided for use with a vehicle. A natural gas detector apparatus is mounted to the vehicle so that the vehicle transports the detector apparatus over an are of interest at speeds of up to 20 miles per hour. The detector apparatus includes a transmitter section and a receiver section displaced a preselected distance from each other. The transmitter section has a light source transmitting a light beam to the receiver section forming a beam path therebetween. The apparatus is arranged such that natural gas intercepts the beam path and absorbs representative wavelengths of the light beam. The receiver section receives a portion of the light beam onto an electro-optical etalon for detecting the gas. A method of detecting natural gas is also provided. The method has the steps of providing a vehicle and mounting a natural gas detector apparatus to the vehicle. The detector apparatus has a transmitter section and a receiver section displaced a preselected distance from each other. The transmitter section includes a light source. The method includes transmitting a light beam in a beam path from the transmitter section to the receiver section, and driving the vehicle over an area of interest so that natural gas intercepts the beam path and absorbs representative wavelengths of the light beam. Fhe method also includes receiving a portion of the light beam in the receiver section so that the light beam is directed into an etalon, and detecting a gas leak in the area of interest from the portion light beam using the gas detection apparatus mounted on the vehicle while the vehicle is in motion.

    摘要翻译: 提供了一种与车辆一起使用的天然气检测系统。 将天然气检测器装置安装到车辆上,使得车辆以高达每小时20英里的速度将检测器装置感兴趣。 检测器装置包括发射器部分和接收器部分,其相互之间的预选距离偏移。 发射机部分具有将光束发射到接收器部分的光源,其在它们之间形成光束路径。 该装置被布置成使得天然气拦截光束路径并吸收光束的代表性波长。 接收器部分将光束的一部分接收到用于检测气体的电光标准具上。 还提供了一种天然气检测方法。 该方法具有提供车辆并将天然气检测器装置安装到车辆的步骤。 检测器装置具有发送器部分和接收器部分,该接收器部分彼此相距预定的距离。 发射机部分包括光源。 该方法包括将光束从发射器部分传输到接收器部分,并且将车辆驱动在感兴趣区域上,使得天然气拦截光束路径并吸收光束的代表性波长。 Fhe方法还包括在接收器部分中接收光束的一部分,使得光束被引导到标准具中,并且使用安装在车辆上的气体检测装置从部分光束检测感兴趣区域中的气体泄漏 而车辆在运动。

    Method and apparatus for generating and transferring high speed data for
high speed testing applications
    2.
    发明授权
    Method and apparatus for generating and transferring high speed data for high speed testing applications 失效
    用于高速测试应用生成和传输高速数据的方法和装置

    公开(公告)号:US5177630A

    公开(公告)日:1993-01-05

    申请号:US627278

    申请日:1990-12-14

    IPC分类号: G01R31/319 H04J14/08

    CPC分类号: H04J14/08 G01R31/31919

    摘要: An optical architecture is provided that can be used for generating high-speed input test vectors from low speed digital data and transferrring those test vectors to a device under test. The optical architecture employs gain-switched laser diodes or optical mixers to produce high-speed optical pulses from the low speed digital data. Optical multiplexing and variable delay devices process the high speed optical pulses to form a high-speed test vector. The architecture can generate test data with psec-type accuracy.

    摘要翻译: 提供了一种光学架构,可用于从低速数字数据生成高速输入测试向量,并将这些测试向量传送到被测设备。 光学架构采用增益开关激光二极管或光混合器从低速数字数据产生高速光脉冲。 光复用和可变延迟器件处理高速光脉冲以形成高速测试矢量。 该架构可以以psec型精度生成测试数据。

    Acousto-optic Q-switch
    3.
    发明授权
    Acousto-optic Q-switch 失效
    声光Q开关

    公开(公告)号:US4057770A

    公开(公告)日:1977-11-08

    申请号:US673562

    申请日:1976-04-05

    CPC分类号: H01S3/03 H01S3/117 H01S3/16

    摘要: An acousto-optic Q-switch consisting of an acoustic transducer and an acoustic absorber affixed in opposing relationship with a portion of a laser medium having a relatively high figure of merit, M, disposed therebetween, provides an integral structural combination for the function of the laser medium and Q-switch which avoids the resonating wave power losses, and eliminates the problem of reflection and alignment encountered in laser systems employing acousto-optic Q-switching devices which are separate and spaced apart from the laser medium.

    摘要翻译: 由声学换能器和声吸收器组成的声光Q开关,其与具有相对较高品质因数M的激光介质的一部分相对置地固定,该激光介质设置在它们之间,为激光介质的功能提供了整体结构组合 激光介质和Q开关,其避免了谐振波功率损耗,并且消除了使用与激光介质分离并间隔开的声光Q开关器件的激光系统中遇到的反射和对准的问题。

    Precious metal doped crystals for hardening of the crystals
    5.
    发明授权
    Precious metal doped crystals for hardening of the crystals 失效
    用于硬化晶体的贵金属掺杂晶体

    公开(公告)号:US4955699A

    公开(公告)日:1990-09-11

    申请号:US276093

    申请日:1988-11-23

    IPC分类号: C30B11/00 G02F1/00

    摘要: Disclosed is a crystal 1 of thallium arsenic selenide, thallium arsenic sulfide, thallium vanadium sulfide, thallium phosphorous selenide, lead halide, cadmium sulfide, cadmium selenide, cadmium tin arsenide, cadmium germanium arsenide, indium phosphoride, indium arsenide, or mixtures thereof, doped with a precious metal in an amount of about 25 ppm up to the solubility limit of a precious metal in the crystal. The crystal is useful in nonlinear optical devices, acousto-optical devices, piezoelectric devices, and other types of optical and acoustic devices.

    摘要翻译: 公开了铊砷化钪,硫化铊硫化物,铊硫化钒,硒化锇,硒化镉,硫化镉,硒化镉,砷化镉锡,砷化镉砷,磷化铟,砷化铟或其混合物的晶体1,掺杂 其中贵金属的量约为25ppm,高达贵金属在晶体中的溶解度极限。 该晶体在非线性光学器件,声光器件,压电器件和其他类型的光学和声学器件中是有用的。

    System for optically splitting high-speed digital signals using
cascading tree-type configuration wherein the number of successive
level of cascading increase by a factor of two
    8.
    发明授权
    System for optically splitting high-speed digital signals using cascading tree-type configuration wherein the number of successive level of cascading increase by a factor of two 失效
    用于使用级联树型配置光学分割高速数字信号的系统,其中级联的连续级数增加一倍

    公开(公告)号:US5297273A

    公开(公告)日:1994-03-22

    申请号:US574976

    申请日:1990-08-30

    摘要: An optical architecture for receiving and slowing down high-speed data for high-speed digital testing applications is provided in which an input generating means transmits high-speed input test vectors to an apparatus under testing. In response, the apparatus under testing generates output test vectors. These high speed output test vectors are converted to slow-speed data signals by optically demultiplexing the high-speed vectors into high-speed parallel data signals and then expanding the parallel data signals to for slow-speed data signals. The slow-speed data signals are then compared with slow-speed reference vectors on a personal computer to determine whether the apparatus under testing is in error for any of its output channels.

    摘要翻译: 提供了一种用于接收和减慢用于高速数字测试应用的高速数据的光学架构,其中输入产生装置向被测设备发送高速输入测试向量。 作为响应,被测设备产生输出测试向量。 这些高速输出测试矢量通过将高速矢量光解复用为高速并行数据信号,然后将并行数据信号扩展为慢速数据信号,将其转换为慢速数据信号。 然后将慢速数据信号与个人计算机上的慢速参考矢量进行比较,以确定被测设备是否对于任何其输出通道是错误的。

    Apparatus for the controlled transmission of light
    9.
    发明授权
    Apparatus for the controlled transmission of light 失效
    用于控制光传输的装置

    公开(公告)号:US4693545A

    公开(公告)日:1987-09-15

    申请号:US646723

    申请日:1984-09-04

    摘要: The invention provides a method for controlling the transmission of radiant energy through a light transmissive medium and an apparatus whereby the method can be effected. The method includes the steps of introducing a first flux of photons, or the evanescent field thereof, into said medium said photons having energy E, and said medium having energy level characteristics such that the energy, E, of said first flux of photons matches an energy gap between an energy level designated as energy level 2, and another energy level designated as energy level 3 of said medium, and said first flux is substantially unattenuated as said first flux of photons, or the evanescent field thereof, passes through said medium; and selectively introducing a second flux of photons, or the evanescent field thereof, into said medium to attenuate said first flux of photons, said second flux of photons causing the population of energy level two of said medium, wherein a portion of said first flux is absorbed, inducing a population in level 3, a portion of which population in level 3 returns to level 2 and is available for further attenuation of said first flux, whereby the control of the transmission of said first flux of photons by said second flux of photons is more efficient than if the return of excited states from level 3 to level 2 did not occur.

    摘要翻译: 本发明提供了一种通过透光介质控制辐射能传输的方法和可实现该方法的设备。 该方法包括以下步骤:将具有能量E的所述光子的第一光通量或其消逝场引入所述介质,并且所述介质具有能级特性,使得所述第一光子束的能量E与 指定为能级2的能级与被指定为所述介质的能量级3的另一能级之间的能量间隙,并且所述第一磁通与所述第一光子束或其渐逝场通过所述介质基本上未衰减; 并且选择性地将第二光子束或其消逝场引入所述介质中以衰减所述第一光子束,所述第二光子束导致所述介质的能级二的群体,其中所述第一通量的一部分是 吸收,诱导3级人口,其中3级人口的一部分返回到2级,并且可用于进一步衰减所述第一通量,由此通过所述第二通量光子控制所述第一光子束的传播 比起兴奋状态从3级恢复到2级没有发生的效率更高。