公开(公告)号：US3811775A

公开(公告)日：1974-05-21

申请号：US26482772

申请日：1972-06-21

Applicant: ASG IND INC

Inventor： ABU SAUD M

IPC: G01L1/24 ,  G01B11/18

CPC classification number: G01L1/241

Abstract: A polariscope is described for detecting stresses in a transparent object. The polariscope comprises means for producing a beam of polychromatic plane polarized light, a condensing lens, an aperture, a quarter-wave retardation plate, analyzing means and a photocell. Changes in stress cause changes in the color and intensity of the light detected. Means are provided for scanning the polychromatic light beam back and forth in one direction across the transparent object that is being studied. Means are also provided for moving the transparent object in a direction transverse to the direction of the scanning light beam. The output of the photocell is applied through an amplifier to a chart recorder in order to produce a plot of the stresses in the object with respect to their position.

Abstract translation: 描述了用于检测透明物体中的应力的偏光镜。 偏振器包括用于产生多色平面偏振光束，聚光透镜，孔径，四分之一波长延迟板，分析装置和光电池的装置。 压力变化会导致检测到的光的颜色和强度发生变化。 提供了用于沿着正在研究的透明物体沿一个方向来回扫描多色光束的装置。 还提供了用于沿垂直于扫描光束的方向的方向移动透明物体的装置。 光电管的输出通过放大器施加到图表记录器，以产生对象相对于它们的位置的应力的图。