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    • 6. 发明授权
    • Interferometer and spatial interference fourier transform spectrometer
    • 干涉仪和空间干涉傅里叶变换光谱仪
    • US08830475B1
    • 2014-09-09
    • US13969634
    • 2013-08-19
    • National Cheng Kung University
    • Wei-Chih WangBenjamin EstroffChih-Han ChangFong-Chin Su
    • G01J3/45G01B9/02
    • G01J3/45G01J3/021G01J3/4531G01J3/4532
    • Disclosed is an interferometer comprising a light source, a reflective element, and a photodetector. The light source is configured to emit a light beam, and an angle is formed by inclusion between a direction to which the light beam travels and the reflective element, the photodetector is configured to be substantially perpendicular to the reflective element. The light beam is halved into a first light beam propagating by the included angle, and a second light beam reflected off the reflective element, the first light beam and the second light beam interfere each other to form an interferogram on the photodetector, which detects the interferogram. By benefit of above, the interferometer does not need to reposition its parts in order to make adjustment to interferogram, thereby simplifying optical element setup and minimizing physical volume of the interferomger. Also disclosed is a spectrometer including the same interferometer and a Fourier-transform-capable analyzer.
    • 公开了一种包括光源,反射元件和光电检测器的干涉仪。 光源被配置为发射光束,并且通过在光束行进的方向与反射元件之间包含形成角度,光电检测器被配置为基本上垂直于反射元件。 光束被分成一个以夹角传播的第一光束,并且从反射元件反射的第二光束,第一光束和第二光束彼此相互干涉以在光电检测器上形成干涉图,该光检测器检测 干涉图。 受益于上述,干涉仪不需要重新定位其部件以便调整干涉图,从而简化了光学元件的设置并使干涉仪的体积最小化。 还公开了包括相同干涉仪和具有傅里叶变换的分析仪的光谱仪。
    • 10. 发明授权
    • Planar lightwave fourier-transform spectrometer measurement including phase shifting for error correction
    • 平面光波傅里叶变换光谱仪测量包括用于纠错的相移
    • US08406580B2
    • 2013-03-26
    • US13192577
    • 2011-07-28
    • Kazumasa TakadaKatsunari Okamoto
    • Kazumasa TakadaKatsunari Okamoto
    • G02B6/12G01J3/45
    • G01J3/4531G01J3/45G01J3/4532
    • A transform spectrometer measurement apparatus and method for a planar waveguide circuit (PLC). The spectrometer typically includes an input optical signal waveguide carrying an input optical signal; a plurality of couplers, each connected to the input optical signal waveguide, and each including a coupler output for carrying a coupled optical signal related to the input optical signal; and an array of interleaved, waveguide Mach-Zehnder interferometers (MZI), each having at least one input MZI waveguide, each MZI input waveguide receiving a coupled optical signal from a respective coupler output. A phase shifting circuit is applied to at least one arm of the MZIs to induce an active phase shift on the arm to thereby measure phase error in the MZIs. Light output from the MZIs is measured under intrinsic phase error conditions and after an active phase shift by the phase shifting circuit.
    • 一种用于平面波导电路(PLC)的变换光谱仪测量装置和方法。 光谱仪通常包括承载输入光信号的输入光信号波导; 多个耦合器,各自连接到输入光信号波导,并且每个耦合器包括耦合器输出,用于承载与输入光信号相关的耦合光信号; 以及每个具有至少一个输入MZI波导的交错的波导马赫 - 策德尔干涉仪阵列(MZI),每个MZI输入波导从相应的耦合器输出接收耦合的光信号。 移相电路施加到MZI的至少一个臂,以引起臂上的有源相移,从而测量MZI中的相位误差。 来自MZI的光输出在固有相位误差条件下测量,并在相移电路进行有源相移之后测量。