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    • 21. 发明授权
    • Nonreciprocal phase shift fiber-optic gyrometer
    • 不可逆相移光纤陀螺仪
    • US07187448B2
    • 2007-03-06
    • US10477360
    • 2002-04-30
    • Jean-Claude Lehureau
    • Jean-Claude Lehureau
    • G01C19/72
    • G01C19/726
    • The present invention relates to a fiber-optic gyrometer including a Sagnac interferometer using two light waves propagating in opposite directions in a interferometer loop including a photodetector which delivers an electrical signal Ud representing the light intensity of the interference between the two waves, and for optically phase-shifting the waves controlled by a square-wave modulation signal Um suitable for controlling an optical phase variation at a frequency FO substantially equal to 1/(2to), where to is the propagation time of a wave through the guide. The photodetector is connected to at least a first sampling circuit and a second sampling circuit which are controlled in phase opposition by a clock. The gyrometer includes a means for inverting the phase of the clock at a frequency f, which is very much less than the frequency FO.
    • 光纤陀螺仪技术领域本发明涉及一种光纤陀螺仪,其包括使用在干涉仪环路中以相反方向传播的两个光波的Sagnac干涉仪,所述干涉仪环路包括传递表示两个波之间的干涉光强度的电信号Ud的光电检测器, 相位移动由方波调制信号Um控制的波,该方波适用于控制基本上等于1 /(2πω)的频率FO的光相位变化,其中t 0 < SUB>是通过引导件的波的传播时间。 光电检测器连接到至少第一采样电路和第二采样电路,其通过时钟相位控制。 陀螺仪包括一个用于以与频率FO非常小的频率f反相时钟相位的装置。
    • 27. 发明授权
    • Reader for optical recording medium
    • 光记录介质读取器
    • US5172368A
    • 1992-12-15
    • US603735
    • 1990-11-15
    • Jean-Claude Lehureau
    • Jean-Claude Lehureau
    • G11B7/09G11B7/1353G11B7/1381
    • G11B7/1353G11B7/1381
    • A device for reading an optical recording medium which includes a source (1) for emitting a first light beam (F1) along a main optical axis (01); a beam splitter (2) to direct, along the main optical axis, the first light beam towards the surface of the recording medium (5), and to split a second beam (F2) obtained by reflection of the first beam on the surface of the recording medium so as to form a third beam (F'3) directed along a secondary optical axis; a focusing lens (4) between the splitter (2) and the surface of the recording medium to focus the first beam on the surface; a mask to introduce a dissymmetry into the third beam; and at least one detection device (7) receiving at least one part of the third beam (F'3) and giving at least one electrical signal expressing the detection made. In this device, the mask is formed by part of an external surface of the light-emitting source (1), and the splitter (2) is positioned and made so that the mask is in the focusing plane of the third beam (F'3).
    • PCT No.PCT / FR90 / 00234 Sec。 371日期1990年11月15日 102(e)1990年11月15日日期PCT提交1990年4月10日PCT公布。 出版物WO90 / 13117 1。一种用于读取光学记录介质的装置,包括用于沿主光轴(01)发射第一光束(F1)的源(1); 分束器(2),沿着主光轴将第一光束朝向记录介质(5)的表面引导,并且将通过第一光束的反射获得的第二光束(F2)分裂在第二光束的表面上 记录介质,以形成沿着副光轴指向的第三光束(F'3); 分离器(2)和记录介质的表面之间的聚焦透镜(4),以将第一光束聚焦在表面上; 将不对称性引入第三束的掩模; 以及至少一个接收所述第三光束(F'3)的至少一部分并且给出表示所述检测的至少一个电信号的检测装置(7)。 在该装置中,掩模由发光源(1)的外表面的一部分形成,分离器(2)被定位并制成使掩模处于第三光束(F')的聚焦平面中, 3)。
    • 30. 发明申请
    • Device for detecting non-metallic objects located on a human subject
    • 用于检测位于人类受试者上的非金属物体的装置
    • US20070102629A1
    • 2007-05-10
    • US10583368
    • 2004-12-08
    • Matthieu RichardJean-Claude LehureauGerard Cachier
    • Matthieu RichardJean-Claude LehureauGerard Cachier
    • H01J40/14
    • G01S13/887G01S7/024G01S7/414G01S13/04G01V8/005
    • The field of the invention is that of devices for detecting objects concealed on human subjects. These devices are more particularly dedicated to the surveillance and protection of airport areas and transport airplanes. Currently, the devices rely either on X-ray detection or on microwave imaging. In the former case, the system can prove hazardous to human beings, and in the other case, the device raises ethical problems. The invention proposes a device whose operation relies on the reflective properties of the microwave signals polarized by the suspect objects that we are seeking to detect. This device can be portable or installed on security gates. This technique is simple to design, inexpensive, does not require any great computing power and is very well suited to the objects to be detected. The complete measurement is extremely quick and requires no sophisticated measuring instrument.
    • 本发明的领域是用于检测隐藏在人类对象上的物体的领域。 这些装置更特别致力于监视和保护机场区域和运输机。 目前,这些设备依赖于X射线检测或微波成像。 在前一种情况下,该系统可以证明对人有害,另一种情况下,该装置会引起道德问题。 本发明提出了一种装置,其操作依赖于我们正在寻求检测的可疑物体所偏振的微波信号的反射特性。 该设备可以便携式或安装在安全门上。 该技术设计简单,价格低廉,不需要任何伟大的计算能力,非常适合于要检测的对象。 完整的测量非常快,不需要复杂的测量仪器。