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    SPECTRAL IMAGE INPUT DEVICE
    11.
    发明申请
    SPECTRAL IMAGE INPUT DEVICE 有权
    光谱图像输入装置

    公开(公告)号：US20030142318A1

    公开(公告)日：2003-07-31

    申请号：US09372536

    申请日：1999-08-11

    Inventor： MANAMI KUISEKO

    IPC: G01B009/02 ,  G01J003/45

    CPC classification number: G01J3/447 ,  G01J3/0224

    Abstract: A spectral image input device has an image forming optical system for forming an image of image light on an image forming surface and a phase difference generating unit disposed anterior to the image forming surface in the direction of image light travel. The phase difference generating unit constitutes, sequentially in the direction of image light travel, a polarizer for transmitting only polarized light in a specific direction, an optical element formed of a solid material having a birefringence, and arranged such that the principal refraction index axis is inclined 45null relative to the polarization angle of the analyzer, the optical element generating a phase difference in accordance with the wavelength of the image light based on the difference in the physical thickness of the optical element in the direction of image light travel and an analyzer for transmitting only the image light of a polarization angle of 90null relative to the direction of the polarized light of the polarizer.

    Abstract translation: 光谱图像输入装置具有用于在图像形成表面上形成图像光的图像形成光学系统和在图像光行进方向上设置在图像形成表面之前的相位差产生单元。 相位差生成单元依次在图像光行进方向上构成用于仅透射特定方向的偏振光的偏振器，由具有双折射的固体材料形成的光学元件，并且将主折射率轴为 相对于分析仪的偏振角倾斜45°，光学元件根据图像光行进方向上的光学元件的物理厚度差和图像光行进方向产生与图像光的波长相位差 用于仅透射偏振角相对于偏振片的偏振光的方向成90°的偏振角的图像光。

    Method and system for optical spectrum analysis with a depolarized local oscillator signal
    13.
    发明申请
    Method and system for optical spectrum analysis with a depolarized local oscillator signal 失效
    具有去极化本地振荡器信号的光谱分析方法和系统

    公开(公告)号：US20020122180A1

    公开(公告)日：2002-09-05

    申请号：US09759004

    申请日：2001-01-11

    Inventor： Bogdan Szafraniec

    IPC: G01J003/45 ,  G01B009/02

    CPC classification number: G01J9/04

    Abstract: An optical spectrum analyzer involves a swept local oscillator signal that is depolarized before the swept local oscillator signal is combined with an input signal. An embodiment of a system for optical spectrum analysis includes a depolarizer, an optical coupler, and a heterodyne receiver. The depolarizer has an input to receive a swept local oscillator signal and an output for outputting a depolarized swept local oscillator signal. The optical coupler has a first input and a second input, the first input receiving an input signal, the second input being optically connected to the depolarizer to receive the depolarized swept local oscillator signal. The optical coupler also has an output for outputting a combined optical signal that includes the input signal and the depolarized swept local oscillator signal. The heterodyne receiver has an input for receiving the combined optical signal from the optical coupler and an output for outputting an electrical signal representative of the combined optical signal. In an embodiment, the swept local oscillator signal is depolarized such that the average polarization state of the swept local oscillator signal contains no preferential polarization state.

    Abstract translation: 光谱分析仪包括在扫频本地振荡器信号与输入信号组合之前被去偏振的扫频本地振荡器信号。 用于光谱分析的系统的实施例包括去偏振器，光耦合器和外差接收器。 去偏振器具有用于接收扫频本地振荡器信号的输入端和用于输出去极化扫频本地振荡器信号的输出端。 光耦合器具有第​​一输入和第二输入，第一输入接收输入信号，第二输入光学连接到去偏振器以接收去极化的扫频本地振荡器信号。 光耦合器还具有用于输出包括输入信号和去极化扫频本地振荡器信号的组合光信号的输出。 外差接收器具有用于接收来自光耦合器的组合光信号的输入端和用于输出表示组合光信号的电信号的输出端。 在一个实施例中，扫频本地振荡器信号被去极化，使得扫频本地振荡器信号的平均极化状态不包含优先偏振状态。

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