OPTICAL SYSTEM TO REDUCE LOCAL INTERNAL BACKSCATTER

    公开(公告)号:WO2021216120A1

    公开(公告)日:2021-10-28

    申请号:PCT/US2020/063030

    申请日:2020-12-03

    Abstract: A LADAR system includes a transmitter configured to emit a directed optical signal. The LADAR system includes a shared optical aperture through which the directed optical signal is emitted. The shared optical aperture includes a first pupil plane. The shared optical aperture receives a return optical signal that is based on the directed optical signal. The system includes a mirror with a hole through which the directed optical signal passes. The mirror also reflects the return optical signal towards an imager. The imager receives the return optical signal and generates an image. The image is based on a portion of the return optical signal. The system also includes a partial aperture obscuration at a second pupil plane. The partial aperture obscuration may block a portion of internal backscatter in the return optical signal. The system also includes a focal plane to record the image.

    Method and apparatus for range resolved laser doppler vibrometry
    2.
    发明公开
    Method and apparatus for range resolved laser doppler vibrometry 有权
    方法和装置的范围分辨激光多普勒振动计

    公开(公告)号:EP2587231A3

    公开(公告)日:2013-05-15

    申请号:EP12182615.0

    申请日:2012-08-31

    CPC classification number: G01H9/00

    Abstract: A method and apparatus (100) is disclosed for optically resolving one or more vibrating objects at an unknown distance using a vibrometer. The vibrometer includes a processor (120), a memory (119), and an optical device (111) including a transmitter and a receiver. The method includes transmitting a first optical waveform (112) having a linear frequency modulated chirp (110a) from the transmitter towards a region of space. At the receiver, a second optical waveform (113) reflected from the one or more vibrating objects in the region of space is received. The vibrometer determines both a vibration frequency and a range information associated with the one or more vibrating objects based upon one or more characteristics of the second optical waveform. The determined vibration frequency and range information are stored in the memory (119) for processing by the processor (120).

    Method and apparatus for range resolved laser doppler vibrometry
    4.
    发明公开
    Method and apparatus for range resolved laser doppler vibrometry 有权
    激光多普勒超声波扫描仪(Verfahren und Vorrichtungfürbereichsaufgelöste)

    公开(公告)号:EP2587231A2

    公开(公告)日:2013-05-01

    申请号:EP12182615.0

    申请日:2012-08-31

    CPC classification number: G01H9/00

    Abstract: A method and apparatus (100) is disclosed for optically resolving one or more vibrating objects at an unknown distance using a vibrometer. The vibrometer includes a processor (120), a memory (119), and an optical device (111) including a transmitter and a receiver. The method includes transmitting a first optical waveform (112) having a linear frequency modulated chirp (110a) from the transmitter towards a region of space. At the receiver, a second optical waveform (113) reflected from the one or more vibrating objects in the region of space is received. The vibrometer determines both a vibration frequency and a range information associated with the one or more vibrating objects based upon one or more characteristics of the second optical waveform. The determined vibration frequency and range information are stored in the memory (119) for processing by the processor (120).

    Abstract translation: 公开了一种用于使用振动计光学地分辨未知距离的一个或多个振动物体的方法和装置(100)。 振动计包括处理器(120),存储器(119)和包括发射器和接收器的光学装置(111)。 该方法包括从发射机向空间区域发射具有线性频率调制线性调频脉冲(110a)的第一光学波形(112)。 在接收器处,接收从空间区域中的一个或多个振动对象反射的第二光波形(113)。 振动计基于第二光波形的一个或多个特性来确定与一个或多个振动对象相关联的振动频率和范围信息。 确定的振动频率和范围信息被存储在存储器(119)中以供处理器(120)处理。

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