Performance analysis of a two-channel polarization division multiplexed optical DQPSK FSO link with the effect of atmospheric turbulence

Islam, Mahmudul; Majumder, S. P.

doi:10.1007/s12596-020-00628-0

Cited by 2 publications

(1 citation statement)

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“…Light typically propagates in an oscillating manner in all directions. Similarly to the intensity and wavelength of light, light polarization also provides rich information [18][19][20][21][22]. Polarized images are generally obtained by adding a polarizer in front of the CCD [23].…”

Section: Imaging Principle Of the Polarization Cameramentioning

confidence: 99%

Thermal radiation elimination method for high-temperature digital image correlation using polarization camera

Wang

Zhang

et al. 2021

Meas. Sci. Technol.

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Digital image correlation (DIC) is a material displacement and strain measurement technology based on visible light illumination. At high temperatures, the problem of thermal radiation seriously affects the quality of acquired images and restricts the development of high-temperature DIC technology which is increasingly applied in the field of high-temperature measurement due to stringent measurement temperature requirements. A thermal radiation elimination method based on the use of a polarization camera for high-temperature DIC measurements is proposed in this study. This method uses a polarization camera combined with a filter set to achieve clear image acquisition at 1200 °C and effectively eliminates the effects of thermal radiation on image acquisition. The gray average method and an image inverse filtering algorithm are adopted in this study to eliminate high-temperature thermal disturbances. Finally, a high-temperature DIC measurement system is independently designed, and a rigid-body displacement experiment is carried out on an FV566 steel specimen to obtain time–displacement curves. A set of uniaxial tensile tests is also performed on FV566 steel material to explore its strain field at 1200 °C.

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Section: Imaging Principle Of the Polarization Cameramentioning

confidence: 99%