Journal ArticleDOI
Polarimetry for spatiotemporal photoelastic analysis
K. Oka,Y. Ohtsuka +1 more
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TLDR
In this article, a photoelastic technique for the spatio-temporal stress analysis is described. But the authors do not consider the use of a rotating analyzer to follow a rapid change in stress distribution within the maximum frame rate.Abstract:
This paper describes a new photoelastic technique for the spatiotemporal stress analysis. In a polarimeter developed, an elliptically polarized signal beam of light, modulated in state of polarization by two-dimensional principal-stress distributions interferes with a reference beam of light consisting of orthogonal linearly polarized two components. A time-sequential series of two-dimensional interference patterns are received one after another by a MOS video camera, followed by a computer. Of the elliptically polarized signal beam, the orthogonal field components along the directions of the principal stresses in a two-dimensional photoelastic sample can be computed from a recorded interference pattern, which offer the data needer for mapping the spatiotemporal principal-stress distribution over the sample. Not only each of the two orthogonal principal stresses but also the principal-stress difference are mapped in a time-sequential diagram. No use of any movable polarization element such as a rotating analyzer allows us to follow a rapid change in stress distribution within the maximum frame rate 2066 s−1 of the MOS video camera.read more
Citations
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Proceedings ArticleDOI
Snapshot complete imaging polarimeter using Savart plates
Kazuhiko Oka,Naooki Saito +1 more
TL;DR: In this article, an interferometric method for measuring the two-dimensional distribution of the state of polarization (SOP) of light is presented, where a pair of Savart plates, a half-wave plate, and an analyzer are inserted between the lenses of a double-diffraction imaging system, so that multiple interference fringes are generated over the video camera.
Journal ArticleDOI
Contour mapping of the spatiotemporal state of polarization of light.
Yoshihiro Ohtsuka,Kazahiko Oka +1 more
TL;DR: A novel interferometric polarimeter capable of mapping a spatiotemporal change in the state of polarization (SOP) of light is described and successful experiments are demonstrated by generating an elliptically polarized beam whose SOP varies in space and time.
Journal ArticleDOI
A development of two-dimensional birefringence distribution measurement system with a sampling rate of 1.3 MHz
Takashi Onuma,Yukitoshi Otani +1 more
TL;DR: In this paper, a two-dimensional birefringence distribution measurement system with a sampling rate of 1.3MHz is proposed. And a polarization image sensor is developed as core device of the system, which is composed of a pixelated polarizer array made from photonic crystal and a parallel read out circuit with a multi-channel analog to digital converter specialized for 2D polarization detection.
Proceedings ArticleDOI
Statistics of polarization speckle: Theory versus experiment
TL;DR: In this paper, the statistical properties of Stokes parameters of polarization speckle were investigated theoretically and experimentally based on the Gaussian assumption for the random electric field components and a polar-interferometer.
Proceedings ArticleDOI
Polarization speckles and generalized Stokes vector wave: A review
TL;DR: In this paper, the generalized Stokes vector wave was introduced to describe the time-time evolution of the correlation between random electric vector fields at two different space-time points, with components similar to those of the beam coherence polarization matrix proposed by Gori.
References
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Book
Principles of Optics
TL;DR: In this paper, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Principles of Optics
TL;DR: In this article, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
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Optical Heterodyne Polarimeter for Studying Space-and Time-dependent State of Polarization of Light
Contour mapping of the spatiotemporal state of polarization of light.
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