Hand-held sound source for sonic infrared imaging of defects in materials
    5.
    发明授权
    Hand-held sound source for sonic infrared imaging of defects in materials 有权
    用于材料缺陷的声波红外成像的手持声源

    公开(公告)号:US07064332B2

    公开(公告)日:2006-06-20

    申请号:US10839767

    申请日:2004-05-05

    IPC分类号: G01N29/22

    摘要: A hand-held sound source for use in an infrared or thermal imaging system that detects sub-surface defects in a structure. The sound source includes a transducer that is positioned against the structure to emit a sound signal into the structure. The sound source further includes an adjustable spring that pushes the transducer against the structure with a predetermined amount of force so that the sound energy is effectively coupled into the structure. The sound source also includes three stabilizing legs that stabilize the transducer on the structure. The length of each leg can be adjustable relative to the length of the other legs so that the sound source can be used against irregular surfaces.

    摘要翻译: 用于红外或热成像系统的手持式声源,用于检测结构中的次表面缺陷。 声源包括一个传感器,其位于结构上以将声音信号发射到该结构中。 声源还包括可调弹簧,其以预定量的力推动换能器抵靠结构,使得声能有效地耦合到结构中。 声源还包括使结构上的换能器稳定的三个稳定腿。 每个腿的长度可相对于其他腿的长度是可调节的,使得声源可以用于不规则的表面。

    Single beam AC interferometer
    9.
    发明授权
    Single beam AC interferometer 失效
    单光束交流干涉仪

    公开(公告)号:US4968144A

    公开(公告)日:1990-11-06

    申请号:US321103

    申请日:1989-03-09

    摘要: A single beam interferometer (10) comprises an intensity modulated laser beam (16) having a focus area for heating a test area (18) on the surface of a sample (12) producing a thermal bump (20). An unfocused probe laser beam (30) is directed toward the solid at an angle and has a beam area greater than the focus area of the heating beam (16). The sample (12) has a reflective surface for reflecting the probe beam (30). The reflected beam (31) comprises an AC beam portion (32) refracted by the thermal bump (20) and a DC beam portion (34) reflected off the unheated surface of the sample (12). The interference pattern (36) produced by the reflected beam (31) is detected and processed to obtain optical, elastic and thermal parameters of the sample (12).

    摘要翻译: 单光束干涉仪(10)包括强度调制激光束(16),其具有用于加热产生热凸块(20)的样品(12)的表面上的测试区域(18)的聚焦区域。 未聚焦的探针激光束(30)以一定角度指向固体并且具有大于加热束(16)的聚焦区域的光束面积。 样品(12)具有用于反射探测光束(30)的反射表面。 反射光束(31)包括由热凸块(20)折射的AC光束部分(32)和从样品(12)的未加热表面反射的DC光束部分(34)。 检测并处理由反射光束(31)产生的干涉图案(36)以获得样品(12)的光学,弹性和热参数。

    Vector lock-in imaging system
    10.
    发明授权
    Vector lock-in imaging system 失效
    矢量锁定成像系统

    公开(公告)号:US4878116A

    公开(公告)日:1989-10-31

    申请号:US202185

    申请日:1988-06-02

    IPC分类号: A61B5/00 H04N5/30 H04N5/33

    CPC分类号: A61B5/01 H04N5/30 H04N5/33

    摘要: The assembly (10) is a real-time imaging device for detecting radiation from an object field which is periodic in time. A video camera (14) detects emitted and reflected radiation from the object field (12) and produces a video signal comprising a series of pixels representing a frame of the image. The video signal is digitized (18) and received by a processor (16). The processor (16) averages the successive frames as in-phase images and quadrature images based on the periodicity of the object field to eliminate unsynchronous noise from the image and to display an image synchronous with the periodicity.

    摘要翻译: 组件(10)是用于检测来自在时间上周期性的物场的辐射的实时成像装置。 视频摄像机(14)检测来自物场(12)的发射和反射辐射,并产生包括表示图像帧的一系列像素的视频信号。 视频信号被数字化(18)并由处理器(16)接收。 处理器(16)基于对象场的周期性将连续帧作为同相图像和正交图像平均,以消除来自图像的非同步噪声并且显示与周期同步的图像。