G - Physics – 01 – N
Patent
G - Physics
01
N
73/54
G01N 21/23 (2006.01) G01L 1/24 (2006.01) G01N 21/47 (2006.01)
Patent
CA 1153578
DEVICE FOR BIREFRINGENCE MEASUREMENTS USING THREE SELECTED SHEETS OF SCATTERED LIGHT (ISODYNE SELECTOR, ISODYNE COLLECTOR, ISODYNE COLLIMATOR) Inventor: Jerzy Tadeusz Pindera, Waterloo, Ontario, Canada. Assignee: Jerzy T. Pindera, University of Waterloo, Waterloo, Ontario, Can. J.T. Pindera & Sons, Engineering Services Waterloo, Ontario, Canada. Filed: Field of Search: Optical measurement methods. Photoelastic stress analy- sis. Applications of scattered (laser) light. Keywords: Scattered light. Scattered light sheets. Optical anisotrophy. Birefringence. Experimental stress analy- sis. Polariscope, Isodynes. ABSTRACT A new method and device has been developed to experimentally determine the state and amount of birefringence along any arbitrary direction through a birefringent body. Such information can be used to determine the optical anisotropy of solid and liquid bodies, the residual and induced stress fields, etc. Essentially, this method and device separates, from the light scattered in all directions along an arbitrary path of laser light in a body, three sheets of light which are subsequently collimated; each of these light sheets contains parallel light rays carrying information of interest. The middle light sheet indicates the line of measurements, which is identical with the path or position of laser beam in a body. The two outer light sheets carry two complementary and independent pieces of information on the state and amount of birefringence along the line of measurements. Thus, both outer sheets of light can be used simultaneously to increase the reliability and accuracy of the birefringence measurements. 8 claims. 5 drawings (figures).
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