PLZT Polarization Camera

s0 s1
s2 s3
  We developed a device to measure the Stokes parameters which represent the polarization state of the light by using a material called PLZT which is controllable from the computer.
  The polarizaiton state of the light is represented by Stokes vector which is a 4D vector. PLZT is transparent ceramics, and has a birefringency depending on the voltage. First, we take an image with the camera where ND filter and PLZT is in front of it. Next, we set a linear polarizer in front of the camera, and set a PLZT in front of the ND filter. Then, we take an image with no voltage to the PLZT. When we set a certain voltage to PLZT, PLZT acts as a quarter waveplate. Here, we take an image. If we set another value of voltage to PLZT, PLZT acts as a half waveplae. We also take an image. From these four images, we calculate the parameters of Stokes vector.
  Almost all of this research is performed by Furuuchi Chemical Corporation.


*Polarization-based Shape Estimation of Transparent Objects by Using Raytracing and PLZT Camera
Daisuke Miyazaki, Noriyuki Takashima, Akira Yoshida, Eiki Harashima, Katsushi Ikeuchi
in Proceedings of SPIE (Polarization Science and Remote Sensing II, Part of SPIE’s International Symposium on Optics and Photonics 2005)
Vol. 5888, pp. 1-14, 2005/8/2 (2005/7/31-8/4)
San Diego Convention Center, San Diego, CA USA
Paper: English, Oral presentation: English
***Invited Talk***

Furuuchi Chemical Corporation

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