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    • 4. 发明申请
    • Magnetic Detector
    • 磁性探测器
    • US20140266175A1
    • 2014-09-18
    • US13799480
    • 2013-03-13
    • Simon Richard HattersleyPeter Georg LaitenbergerAudrius Brazdeikis
    • Simon Richard HattersleyPeter Georg LaitenbergerAudrius Brazdeikis
    • G01N27/72
    • G01N27/745A61B5/05G01R33/0213G01R33/10
    • A probe and method for detecting magnetic particles. In one embodiment, the probe includes a probe core having a first end and a second end, the probe core defining two regions for containing coils of wire, one of the regions being adjacent the first end of the cylindrical probe core; two sense coils, one each of the sense coils being located in a respective one of the regions; and two drive coils, one each of the drive coils being located in a respective one of the regions, wherein the regions are separated by a distance equal to or greater than the diameter of one of the coils and a source of a secondary magnetic drive field. In another embodiment, the frequency of the drive signal of the secondary magnetic drive field is less than the frequency of the drive signal of the primary drive coils.
    • 用于检测磁性颗粒的探针和方法。 在一个实施例中,探针包括具有第一端和第二端的探针芯,探针芯限定用于容纳线圈的两个区域,其中一个区域与圆柱形探针芯的第一端相邻; 两个感测线圈,每个感测线圈位于相应的一个区域中; 和两个驱动线圈,每个驱动线圈位于相应的一个区域中,其中区域被分开等于或大于一个线圈的直径和次级磁驱动场的源的距离 。 在另一个实施例中,次级磁驱动场的驱动信号的频率小于主驱动线圈的驱动信号的频率。
    • 6. 发明申请
    • DETECTOR CIRCUITS FOR INTERFEROMETERS
    • 用于干扰计的检测器电路
    • US20140218745A1
    • 2014-08-07
    • US14239509
    • 2012-08-08
    • Simon Richard Hattersley
    • Simon Richard Hattersley
    • G01B9/02
    • G01B9/02055G01B9/02004G01B9/02027G01B9/02041G01B9/02087G01B9/02091G01B2290/45
    • A detector circuit for a multi-channel interferometer, typically as may be used in an optical coherence tomography device, comprising: a plurality of measurement channels (43) each comprising a measurement detector (31); and a balance channel (44) comprising a balance detector (30), each of the measurement detectors (31) and the balance detector (30) having a light sensitive area and an electrical output configured to output a signal indicative of the intensity of light incident on the light sensitive area, in which each measurement channel (43) is provided with a feedback circuit (40) comprising: a variable gain circuit (35) having an input for the signal from the measurement detector (31) and an output, the variable gain circuit (35) being configured to output at its output the signal received at its input with a variable level of gain; a difference circuit (38) having a first input for the output of the variable gain circuit (35), a second input for the signal from the balance detector (30) and an output, and being configured to output at its output a signal indicative of a difference of the signals at its first and second inputs; and a controller (36) for each variable gain circuit (35) configured to vary the variable level of gain dependent upon a low frequency component of the output of the difference circuit (38).
    • 一种用于多通道干涉仪的检测器电路,通常可用于光学相干断层摄影装置,包括:多个测量通道(43),每个测量通道包括测量探测器(31); 以及包括平衡检测器(30)的平衡通道(44),每个所述测量检测器(31)和所述平衡检测器(30)具有光敏区域和被配置为输出指示光强度的信号的电输出 每个测量通道(43)设置有反馈电路(40),该反馈电路(40)包括:具有来自测量检测器(31)的信号的输入的可变增益电路(35)和输出, 所述可变增益电路(35)被配置为在其输出处输出在其输入处接收的信号,其具有可变增益水平; 具有用于可变增益电路(35)的输出的第一输入的差分电路(38),来自余额检测器(30)的信号的第二输入和输出,并且被配置为在其输出端输出指示 信号在其第一和第二输入端的差异; 以及用于每个可变增益电路(35)的控制器(36),其被配置为根据差分电路(38)的输出的低频分量来改变增益的可变电平。
    • 8. 发明授权
    • Single mode optical fiber with depressed trench
    • 单模光纤带凹槽
    • US08488931B2
    • 2013-07-16
    • US12902190
    • 2010-10-12
    • Marianne Bigot-AstrucPierre SillardLouis-Anne De MontmorillonDenis MolinSimon Richard
    • Marianne Bigot-AstrucPierre SillardLouis-Anne De MontmorillonDenis MolinSimon Richard
    • G02B6/02G02B6/00
    • G02B6/0365C03B2201/12C03B2201/31C03B2203/22C03B2203/23G02B6/03683G02B6/03688
    • An optical fiber having a core and an outer cladding, the core including from its center outward a central core having a radius and a refractive index difference with respect to the outer cladding, and a depressed inner cladding. The depressed inner cladding includes at least a first portion having a radius and a refractive index difference with respect to the outer cladding, the first portion preferably being adjacent to the central core, and a second portion adjacent to the first portion constituting a depressed trench having a radius, and a refractive index difference with respect to the outer cladding. The first portion of the inner cladding has a refractive index below the refractive index of the outer cladding, and the depressed trench has a refractive index that is lower than the refractive index of the first portion of the depressed inner cladding. The outer radius of the depressed inner cladding of the optical fiber is between 28 μm and 40 μm, the LP01 mode leakage losses at a wavelength of 1550 nm are less than 0.01 dB/km and the cable cut-off wavelength is less than 1530 nm.
    • 具有芯和外包层的光纤,所述芯从其中心向外包括具有相对于外包层的半径和折射率差的中心芯和凹陷的内包层。 凹陷的内包层至少包括具有相对于外包层的半径和折射率差的第一部分,第一部分优选地邻近中心芯,以及与构成凹陷槽的第一部分相邻的第二部分, 半径和相对于外包层的折射率差。 内包层的第一部分的折射率低于外包层的折射率,并且凹槽的折射率低于凹陷的内包层的第一部分的折射率。 光纤的凹陷内包层的外半径在28μm和40μm之间,1550nm波长处的LP01模式泄漏损耗小于0.01dB / km,电缆截止波长小于1530nm 。
    • 10. 发明申请
    • JET PROPULSION UNIT FOR A WATERCRAFT
    • 水喷射喷射装置
    • US20120275906A1
    • 2012-11-01
    • US13097792
    • 2011-04-29
    • Gilbert LEFRANCOISReal DUPONTSimon RICHARDRoger RIOUX
    • Gilbert LEFRANCOISReal DUPONTSimon RICHARDRoger RIOUX
    • F04D29/56
    • B63H11/04B63H11/113B63H25/46F16K11/0873
    • A jet propulsion unit has a water inlet, a pump body, an impeller, and a valve assembly fluidly. The valve assembly has a valve housing having an inlet fluidly connected to the pump body, a first outlet and a second outlet. A valve body is disposed in the valve housing and is movable between first and second positions. In the first position, water from a body of water flows consecutively through the water inlet, the pump body, the inlet of the valve housing, the valve housing and the first outlet of the valve housing. In the second position, water from the body of water flows consecutively through the water inlet, the pump body, the inlet of the valve housing, the valve housing, and the second outlet of the valve housing. A watercraft having the jet propulsion unit is also disclosed.
    • 喷射推进装置具有进水口,泵体,叶轮和阀组件。 阀组件具有阀壳体,其具有流体连接到泵体的入口,第一出口和第二出口。 阀体设置在阀壳体中并且可在第一和第二位置之间移动。 在第一位置,来自水体的水连续地流过水入口,泵体,阀壳的入口,阀壳体和阀壳体的第一出口。 在第二位置,来自水体的水连续地流过水入口,泵体,阀壳的入口,阀壳体和阀壳体的第二出口。 还公开了具有喷气推进装置的船舶。