Multiple-point temperature sensor using optic fibers
    2.
    发明授权
    Multiple-point temperature sensor using optic fibers 失效
    使用光纤的多点温度传感器

    公开(公告)号:US4928005A

    公开(公告)日:1990-05-22

    申请号:US300926

    申请日:1989-01-24

    IPC分类号: G01D5/34 G01K11/32

    CPC分类号: G01K11/32 G01D5/344

    摘要: A multiple-point temperature sensor, with optic fibers, uses the effect of variation in the birefringence in a birefringent optic fiber as a function of temperature. This sensor has a plane polarized, wide spectrum source coupled to a monomode optic fiber for preservation of polarization, along one of the neutral axes, with weak coupling points distributed along this fiber. A polarizer at 45.degree. to the neutral axes of the fiber is placed at the output of this sensing fiber. The output radiation is analyzed by spectroscopy, for example in a Michelson interferometer, capable of being swept, associated with a detector. The interferometer shifts needed to detect the extreme values of the transmission function are measurements of temperature deviations.

    摘要翻译: 具有光纤的多点温度传感器使用作为温度的函数的双折射光纤中的双折射变化的效果。 该传感器具有平面偏振的宽光谱源,其耦合到单模光纤,用于沿着一个中性轴沿着沿着该光纤分布的弱耦合点来保持偏振。 在该感光纤维的输出处放置与光纤的中性轴成45度的偏振器。 通过光谱分析输出辐射,例如在迈克尔逊干涉仪中,能够被扫描,与检测器相关联。 检测传输功能的极值所需的干涉仪位移是温度偏差的测量。

    Electromagnetic disturbance free ring interferometer
    3.
    发明授权
    Electromagnetic disturbance free ring interferometer 失效
    电磁干扰自由振荡器

    公开(公告)号:US5172184A

    公开(公告)日:1992-12-15

    申请号:US623899

    申请日:1991-01-03

    IPC分类号: G01C19/72

    CPC分类号: G01C19/721

    摘要: The interferometer of the invention, of the type with an optical fibre in ring form, with a measuring head (16) connected to a distant processing center (18) by cables, has an optoelectronic detector (17) removed to the center and connected to the measuring head by a multimode optical fibre (19).

    摘要翻译: PCT No.PCT / FR90 / 00320 Sec。 371日期1991年1月3日 102(e)日期1991年1月3日PCT提交1990年5月4日PCT公布。 第WO90 / 14577号公报 日本1990年11月29日。具有环形光纤的本发明的干涉仪具有通过电缆连接到远处理中心(18)的测量头(16),具有光电检测器(17) 移除到中心并通过多模光纤连接到测量头(19)。

    Method for the detection of polarization couplings in a birefringent
optical system and application of this method to the assembling of the
components of an optical system
    5.
    发明授权

    公开(公告)号:US4893931A

    公开(公告)日:1990-01-16

    申请号:US166492

    申请日:1988-03-10

    CPC分类号: G01M11/331

    摘要: A method for the detection of localized polarization couplings in a birefringent guided optical system uses a polarizer, at 45.degree. with respect to the axes of the optical system placed at its output, and followed by a Michelson type interferometer in which one of the optical paths has a variable length. When the length of an optical path undergoes variation, interference fringes appear on half of the energy emitted. The difference in the length of the optical paths when fringes of this type appear characterizes the position of a localized polarization coupling, and the contrast between the fringes measured for this difference in length characterizes the amplitude ratio between the primary wave and the coupled wave. The invention can be applied in particular, to the assembly of the components of a birefringent optical system.

    摘要翻译: 在双折射引导光学系统中用于检测局部偏振耦合的方法使用偏振器,相对于放置在其输出处的光学系统的轴线为45°,随后为迈克尔逊型干涉仪,其中一条光路 具有可变长度。 当光路的长度变化时,干扰条纹出现在发射的能量的一半上。 当这种条纹的光路长度的差异出现在局部极化耦合的位置上时,对于该长度差测量的条纹之间的对比度表征了主波和耦合波之间的振幅比。 本发明可以特别应用于双折射光学系统的部件的组装。