As the exploitation of oil and gas field becomes more difficulty nowadays, severe casing deformation may occur if anti-extrusion strength decreases to a certain degree this brings large economic loss safety problems. an annular sheath between formation, creep well cement paste is one most important factors in deciding abnormal wellbore integrity. To figure out mechanism on how reduce value past...

The incidence angle of a beam entering liquid crystal variable retarder (LCVR) and the polarization grating (LCPG) is greater when LCPG utilized in quadrature cascade, which reduces diffraction efficiency. Therefore, this study investigates best method for controlling cascaded LCPG. By optimizing control coefficient voltage LCVR, between incident LCVR grating, increases efficiency grating. It w...

1532-Pos Board B302 Quantitative Scheme for Full-Field Polarization Rotating Fluorescence Microscopy (PROM) using a Liquid Crystal Variable Retarder John F. Lesoine. National Institute of Standards and Technology, Gaithersburg, MD, USA. We present a quantitative scheme for full-field polarization rotating fluorescence microscopy (PROM). A quarter-wave plate, in combination with a liquid crystal...

Meanderline wave plates are in common use at radio frequencies as polarization retarders. We present initial results of a gold meanderline structure on a silicon substrate that functions at a wavelength of 10.6 microm in the IR. The measured results show a distinct change in the polarization state of the incident beam after passing through the device, inducing a 74 degrees phase retardance betw...