公开(公告)号：US20180188167A1

公开(公告)日：2018-07-05

申请号：US15860978

申请日：2018-01-03

申请人： Ingmar SCHOEGL

发明人： Ingmar SCHOEGL

IPC分类号： G01N21/45 ,  H04N17/02

CPC分类号： G01N21/455 ,  G01F1/661 ,  G01N21/274 ,  H04N17/02

摘要： Embodiments of the present application are directed toward a focusing Schlieren technique that is capable of adding color-coded directional information to the visualization of density gradients. Other advantages of the technique can include that it does not require manual calibration, has a simple design and is sensitive enough to be used in compact experimental setups. Certain embodiments include the use of a color-coded source image that replaces the conventional source grid. The technique may benefit from a computer-controlled digital background, which is used for both illumination and display of color-coded source images.

公开(公告)号：US07692781B2

公开(公告)日：2010-04-06

申请号：US10551191

申请日：2004-03-15

申请人： Barry Raymond Hill ,  Simon Peter Aldred

发明人： Barry Raymond Hill ,  Simon Peter Aldred

IPC分类号： G01N21/00

CPC分类号： G06T7/001 ,  G01N21/455 ,  G01N21/958 ,  G01N2021/9586

摘要： A method of forming a shadowgraph image is described, comprising the steps of illuminating a glazing (52), e.g., a vehicle windscreen, with light from a localized light source (50), said light being expanded and collimated by a lens optical system (54) or a mirror optical system, forming a virtual shadowgraph image of the glazing in a virtual image plane (56), which may be positioned behind or in front of the glazing: and imaging the virtual image onto a CCD camera (62). The glazing may be moving relative to the light source or may be stationary. Furthermore, a method of glazing inspection is described, comprising forming a shadowgraph image as outlined above; processing the shadowgraph image to exclude measurement points corresponding to obscure areas of the glazing as non-valid measurement points: obtaining a processed image by determining an illumination value for each valid measurement point; constructing a reference image by scanning a convolution window point by point over the processed image; and comparing the illumination value of the corresponding point of the reference image.

摘要翻译： 描述了一种形成阴影图像的方法，包括以下步骤：利用来自局部光源（50）的光照亮玻璃窗（52），例如车辆挡风玻璃，所述光被透镜光学系统（... 54）或镜面光学系统，在可以位于玻璃窗后面或前面的虚拟像平面（56）中形成玻璃窗的虚拟阴影图像，并将虚像映像到CCD照相机（62）上。 玻璃窗可能相对于光源移动或者可以是静止的。 此外，描述了一种玻璃检查方法，包括如上所述形成阴影图像; 处理阴影图像以将对应于玻璃窗的模糊区域的测量点排除为非有效测量点：通过确定每个有效测量点的照明值来获得处理的图像; 通过在处理的图像上逐点扫描卷积窗来构造参考图像; 以及比较参考图像的相应点的照明值。

公开(公告)号：US20070008522A1

公开(公告)日：2007-01-11

申请号：US10551191

申请日：2004-03-15

申请人： Barry Hill ,  Simon Aldred

发明人： Barry Hill ,  Simon Aldred

IPC分类号： G01N21/88

CPC分类号： G06T7/001 ,  G01N21/455 ,  G01N21/958 ,  G01N2021/9586

摘要： A method of forming a shadowgraph image is described, comprising the steps of illuminating a glazing (52), e.g., a vehicle windscreen, with light from a localised light source (50), said light being expanded and collimated by a lens optical system (54) or a mirror optical system, forming a virtual shadowgraph image of the glazing in a virtual image plane (56), which may be positioned behind or in front of the glazing: and imaging the virtual image onto a CCD camera (62). The glazing may be moving relative to the light source or may be stationary. Furthermore, a method of glazing inspection is described, comprising forming a shadowgraph image as outlined above; processing the shadowgraph image to exclude measurement points corresponding to obscure areas of the glazing as non-valid measurement points: obtaining a processed image by determining an illumination value for each valid measurement point; constructing a reference image by scanning a convolution window point by point over the processed image: and comparing the illumination value of the corresponding point of the reference image.

摘要翻译： 描述了一种形成阴影图像的方法，包括以下步骤：利用来自局部光源（50）的光照亮玻璃窗（52），例如车辆挡风玻璃，所述光被透镜光学系统（...， 54）或镜面光学系统，在可以位于玻璃窗后面或前面的虚拟像平面（56）中形成玻璃窗的虚拟阴影图像，并将虚像映像到CCD照相机（62）上。 玻璃窗可能相对于光源移动或者可以是静止的。 此外，描述了一种玻璃检查方法，包括如上所述形成阴影图像; 处理阴影图像以将对应于玻璃窗的模糊区域的测量点排除为非有效测量点：通过确定每个有效测量点的照明值来获得处理的图像; 通过在处理的图像上逐点扫描卷积窗来构建参考图像;以及比较参考图像的相应点的照明值。

公开(公告)号：US5515158A

公开(公告)日：1996-05-07

申请号：US189258

申请日：1994-02-01

申请人： James T. Heineck

发明人： James T. Heineck

IPC分类号： G01N21/45 ,  G01N21/41

CPC分类号： G01N21/455

摘要： A retroreflective type focusing schlieren system which permits the light source to be positioned on the optic side of the system. The system includes an extended light source, as opposed to a point source, located adjacent a beam splitter which projects light through the flow field onto a reflecting grating in the form of a grid which generates sheets of light that are directed back through the flow field and the beam splitter onto a primary lens behind which is located a cut-off grid having a grid pattern which corresponds to the grid pattern of the reflecting grating. The cut-off grid is adjustably positioned behind the primary lens and an image plane for imaging the turbulence is adjustably located behind the cut-off grid.

摘要翻译： 一种允许光源位于系统光学侧的回射式聚焦扫雷系统。 该系统包括与点源相对的扩展光源，该光源与光束分离器相邻，该光束分离器将光通过流场投射到格栅形式的反射光栅上，该光栅产生光束，该光束通过流场 并且分束器在主透镜之后，其位于具有对应于反射光栅的格栅图案的网格图案的截止网格。 截止栅格可调节地定位在主透镜后面，并且用于成像湍流的图像平面可调节地位于截止栅格之后。

公开(公告)号：US4784494A

公开(公告)日：1988-11-15

申请号：US948247

申请日：1986-12-31

申请人： Janusz B. Pawliszyn

发明人： Janusz B. Pawliszyn

IPC分类号： G01N21/25 ,  G01N21/45 ,  G01N27/26 ,  G01N30/74 ,  G01N35/08 ,  G01N21/41 ,  G01N21/00

CPC分类号： G01N30/74 ,  G01N21/455 ,  G01N2201/0621 ,  G01N2201/0696 ,  G01N2201/0826 ,  G01N35/085

摘要： Concentration gradients in samples to be evaluated are detected by measuring the deflection of a probe light beam passed through the sample using the principals of Shlieren optics. Specific chemical compounds in a sample can be detected and identified by supplying excitation energy to the sample where such energy is selected to be absorbed by the chemical compound to be specifically identified and not by other compounds in the sample. The absorption of the excitation energy by the absorbing compound produces a temperature gradient within the sample which causes deflection of the probe light beam and signals representative of such deflection may be separated from signals representative of deflections caused by other refractive index gradients present in the sample. A light emitting diode may be used to generate the probe light beam. Rather than detecting movement of the probe light beam caused by an unknown gradient, by passing the probe light beam through a known gradient, with or without excitation energy present, the light beam can be deflected in a controlled manner.

摘要翻译： 使用Shlieren光学元件的原理，通过测量通过样品的探针光束的偏转来检测要评估的样品中的浓度梯度。 可以通过向样品中提供激发能量来检测和鉴定样品中的特定化合物，其中这种能量被选择为待被特定鉴定的化合物吸收，而不是样品中的其他化合物吸收。 吸收化合物对激发能的吸收在样品内产生温度梯度，导致探针光束的偏转，代表这种偏转的信号可以与表示样品中存在的其它折射率梯度引起的偏转的信号分离。 可以使用发光二极管来产生探测光束。 通过使探测光束通过具有或不具有激发能量的已知梯度而不是检测由未知梯度引起的探测光束的移动，可以以受控的方式偏转光束。

公开(公告)号：US3454341A

公开(公告)日：1969-07-08

申请号：US3454341D

申请日：1965-06-29

申请人： MARTIN CHRIST

发明人： BEUTELSPACHER HANS

IPC分类号： G01N21/45 ,  G01N21/46

CPC分类号： G01N21/455

公开(公告)号：US3346478A

公开(公告)日：1967-10-10

申请号：US30761363

申请日：1963-09-09

申请人： SANDOZ LTD

发明人： ERWIN WIEDEMANN

IPC分类号： G01N21/45 ,  G01N27/447

CPC分类号： G01N21/455 ,  G01N27/44721

公开(公告)号：US3004466A

公开(公告)日：1961-10-17

申请号：US74534058

申请日：1958-06-30

申请人： SANDOZ LTD

发明人： ERWIN WIEDEMANN

IPC分类号： G01N21/45

CPC分类号： G01N21/455

公开(公告)号：US20150048264A1

公开(公告)日：2015-02-19

申请号：US14135585

申请日：2013-12-20

申请人： National Taiwan University

发明人： Chen-Li Sun ,  Tzu-Hsun Hsiao ,  Chien-Yuan Huang

IPC分类号： G01N21/17

CPC分类号： G01N21/17 ,  G01N21/45 ,  G01N21/455 ,  G01N2021/1765

摘要： A fluid analysis method is provided. A gradient distribution of a first scalar property of a calibration fluid in a space is obtained. A calibration schlieren image of the calibration fluid is acquired and processed to obtain an intensity distribution of the calibration schlieren image. The gradient distribution of the first scalar property of the calibration fluid in the space is mapped to the intensity distribution of the calibration schlieren image, so as to obtain a corresponding relation between the gradients of the first scalar property and the intensities. A test schlieren image of a test fluid is acquired and processed to obtain intensity distribution of the test schlieren image. The intensity distribution of the test schlieren image is converted to the gradient distribution of the first scalar property of the test fluid according to the corresponding relation. Moreover, a fluid analysis system is also provided.

摘要翻译： 提供了一种流体分析方法。 获得校准流体在空间中的第一标量特性的梯度分布。 获取并处理校准流体的校准图像以获得校准图像的强度分布。 将空间中的校准液的第一标量特性的梯度分布映射到校准图像的强度分布，以获得第一标量特性的梯度与强度之间的对应关系。 获取并处理测试流体的测试图像以获得测试图像的强度分布。 根据相应的关系，将测试图像的强度分布转换为测试液的第一标量特性的梯度分布。 此外，还提供了流体分析系统。

公开(公告)号：US07528945B2

公开(公告)日：2009-05-05

申请号：US10548661

申请日：2004-03-15

申请人： Barry Raymond Hill ,  Simon Peter Aldred

发明人： Barry Raymond Hill ,  Simon Peter Aldred

IPC分类号： G01N21/00

CPC分类号： G06T7/0006 ,  G01N21/455 ,  G01N21/958 ,  G01N2021/9586

摘要： A method of determining the optical quality of a glazing which includes at least one area having a reduced light transmission, involves producing a shadowgraph image of the glazing and measuring the illumination of the glazing at a plurality of measurement points arranged in an array extending over the glazing. The deviation in illumination from a desired value at each measurement point is determined and the at least one area of reduced light transmission is omitted from the array of measurement points.

摘要翻译： 一种确定玻璃窗的光学质量的方法，其包括具有降低的光透射率的至少一个区域，涉及产生玻璃窗的阴影图像，并且以布置在阵列上方的阵列中的多个测量点测量玻璃窗的照明 上釉 确定每个测量点处的照明偏差与期望值，并且从测量点阵列中省略减少的光透射的至少一个区域。