Arrayed waveguide grating type optical multiplexer/demultiplexer
    12.
    发明授权
    Arrayed waveguide grating type optical multiplexer/demultiplexer 失效
    阵列波导光栅类型光复用器/解复用器

    公开(公告)号:US06404946B1

    公开(公告)日:2002-06-11

    申请号:US09635492

    申请日:2000-08-09

    IPC分类号: G02B628

    CPC分类号: G02B6/12016

    摘要: An arrayed waveguide grating type optical multiplexer/demultiplexer including an arrayed waveguide grating having a plurality of channel waveguides. Concave end faces of input-side and output-side slab waveguides are connected to opposite ends of the diffraction grating. At least one input waveguide and at least one output waveguide are connected to the other concave end faces of the input-side and output-side slab waveguides, respectively. The focal length of the output-side slab waveguide end face is longer than the focal length of the input-side slab waveguide end face. The optical multiplexer/demultiplexer has a sufficiently flat wavelength-dependent spectrum response in passing channel spacings, and helps construct an optical wavelength multiple communication system having a good signal-to-noise ratio.

    摘要翻译: 包括具有多个通道波导的阵列波导光栅的阵列波导光栅型光信号多路复用器/解复用器。 输入侧和输出侧平板波导的凹面连接到衍射光栅的相对端。 至少一个输入波导和至少一个输出波导分别连接到输入侧和输出侧平板波导的其它凹端面。 输出侧平板波导端面的焦距比输入侧平板波导端面的焦距长。 光复用器/解复用器在通过信道间隔中具有足够平坦的波长依赖的频谱响应,并且有助于构建具有良好信噪比的光波长多通信系统。

    Thin film head
    13.
    发明授权
    Thin film head 有权
    薄膜头

    公开(公告)号:US06172858B2

    公开(公告)日:2001-01-09

    申请号:US09479651

    申请日:2000-01-07

    IPC分类号: G11B5127

    摘要: The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films, a nonmagnetic film sandwiched between the magnetic films, and leads connected to the magnetoresistance effect element wherein the width of one of the magnetic films, which essentially responds to a signal magnetic field, is not more than a distance between leads. The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films and a nonmagnetic film sandwiched between the magnetic films, which makes use of a change in magnetic resistance caused by spin-dependent scattering, wherein at least a portion of one magnetic films, which essentially respond to a signal magnetic field extends in a direction same as that of the signal magnetic field.

    摘要翻译: 本发明提供了一种具有磁阻效应元件的薄膜头,该磁阻效应元件包括至少两个磁性膜,夹在磁性膜之间的非磁性膜和连接到磁阻效应元件的引线,其中一个磁性膜的宽度基本上 响应信号磁场,不超过引线之间的距离。 本发明提供了具有磁阻效应元件的薄膜头,该磁阻效应元件包括至少两个磁性膜和夹在磁性膜之间的非磁性膜,其利用由自旋依赖性散射引起的磁阻的变化,其中至少一个 基本上响应于信号磁场的一个磁性膜的部分在与信号磁场的方向相同的方向上延伸。

    Method of manufacturing magnetic head
    14.
    发明授权
    Method of manufacturing magnetic head 失效
    制造磁头的方法

    公开(公告)号:US5022140A

    公开(公告)日:1991-06-11

    申请号:US490407

    申请日:1990-03-08

    IPC分类号: G11B5/187 G11B5/265

    摘要: In a magnetic head a metal magnetic layer and a non-magnetic layer are sequentially formed on a pair of magnetic cores in which track widths are formed by a predetermined pitch. The metal magnetic layer and the non-magnetic layer formed outside the track widths are removed while leaving the track widths formed in said magnetic cores, thereby forming a regulation groove. The track widths of one magnetic core from which the metal magnetic layer and the non-magnetic layer are removed are caused to oppose those of the other magnetic core. Glass as an adhesive is filled in the regulation groove and melted to bond the magnetic cores so that a gap having the metal magnetic layer is formed. The pair of magnetic cores bonded to form the gap therebetween are cut by a predetermined pitch to form a magnetic head.

    摘要翻译: 在磁头中,金属磁性层和非磁性层依次形成在一对磁芯上,其中轨道宽度以预定间距形成。 去除形成在轨道宽度外部的金属磁性层和非磁性层,同时留下形成在所述磁芯中的轨道宽度,从而形成调节槽。 使去除金属磁性层和非磁性层的一个磁芯的磁道宽度与另一个磁芯的轨道宽度相反。 将作为粘合剂的玻璃填充在调节槽中并熔融以将磁芯结合,从而形成具有金属磁性层的间隙。 将形成间隙的一对磁芯切割成预定间距,形成磁头。

    Hermetic compressor
    15.
    发明授权
    Hermetic compressor 失效
    气密压缩机

    公开(公告)号:US4990067A

    公开(公告)日:1991-02-05

    申请号:US390816

    申请日:1989-08-07

    IPC分类号: F04B39/00 F04B39/12

    摘要: A hermetic compressor according to the present invention has an improved operating efficiency for use in a cold storage chamber, freezing chamber or the like . The compression includes a suction pipe which is formed by a material having heat conductivity lower than that of a casing of the hermetic compressor so that heat of the closed casing is not easily transmitted to the suction pipe. In this manner heating of the drawn in cooling medium gas is inhibited, and thus, cooling efficiency can be improved by preventing discharge of a low density cooling medium into the cooling system through compression of the expanded cooling medium gas.

    Method and apparatus for analyzing vapors generated from explosives
    20.
    发明授权
    Method and apparatus for analyzing vapors generated from explosives 有权
    分析爆炸物产生的蒸气的方法和装置

    公开(公告)号:US06770877B2

    公开(公告)日:2004-08-03

    申请号:US10457426

    申请日:2003-06-10

    IPC分类号: H01J4910

    CPC分类号: H01J49/145

    摘要: A method and apparatus for analyzing vapors generated from explosives in which vapors containing nitrogen monoxide and/or nitrogen dioxide are generated by decomposing explosives by increasing the temperature of the explosives, primary ions and neutral molecules are generated from air. The generated primary ions and the nitrogen monoxide and/or nitrogen dioxide contained in the generated vapors are allowed to react with each other in an area inhibited or prevented from being penetrated by the generated neutral molecules, and the nitrogen monoxide and/or nitrogen dioxide contained in the generated vapors is ionized. The ionized nitrogen monoxide and/or nitrogen dioxide is subjected to mass spectrometry, and an amount of the nitrogen monoxide and/or nitrogen dioxide contained in the generated vapors by decomposing the explosives is determined.

    摘要翻译: 用于分析由爆炸物产生的蒸汽的方法和装置,其中通过从空气中产生爆炸物,初级离子和中性分子的温度来分解包含一氧化氮和/或二氧化氮的蒸气而产生的蒸气。 产生的初级离子和产生的蒸气中含有的一氧化氮和/或二氧化氮在被产生的中性分子渗透的区域中彼此反应,并且含有一氧化氮和/或二氧化氮 在产生的蒸气中电离。 对离子化的一氧化氮和/或二氧化氮进行质谱分析,并确定通过分解爆炸物而产生的蒸汽中所含的一氧化氮和/或二氧化氮的量。