Broadband ellipso-polarimetric camera utilizing tunable liquid crystal achromatic waveplate with imp
- Aug 29, 2021
- 1 min read
Updated: Feb 1
An ellipso-polarimetric camera integrated with improved field of view tunable achromatic waveplate (AWP) over wide spectral band based on nematic liquid crystal retarders is presented. The AWP operates as half, quarter and full waveplate over a wide range of 430-780nm and wide field of view.
Abstract
An ellipso-polarimetric camera integrated with improved field of view tunable achromatic waveplate (AWP) over wide spectral band based on nematic liquid crystal retarders is presented. The AWP operates as half, quarter and full waveplate over a wide range of 430-780nm and wide field of view. The proposed analysis proved that capturing images at these modes is sufficient to extract the ellipsometric parameters: sin(2ψ), cos(Δ) and the Stokes parameters S1 and S3, besides showing the relations in between. Transmission and reflection modes setups are demonstrated in addition to an ellipso-polarimetric smartphone camera. The results show for the first time superiority of cos(Δ) images in which prominent contrast and fine details appear even with scattering objects and higher immunity to device errors. Biometric, remote sensing and archeological improved imaging applications are demonstrated.
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Broadband ellipso-polarimetric camera utilizing tunable liquid crystal achromatic waveplate with improved field of view: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-27-9-12011&id=409017
Wow, this post really opened my eyes to the complexities of broadband ellipso-polarimetric measurements. Honestly, before reading this, I had only a superficial understanding of the topic, and this has filled a significant knowledge gap for me. It's fantastic to have such a clear explanation. I especially appreciated the section on the tunable liquid crystal achromatic waveplate; that detail was particularly illuminating https://www.treasury.tas.gov.au/liquor-and-gaming It’s interesting because my own perspective on this technology has completely shifted after I had some hands-on experience with similar equipment last year. I found myself nodding along with almost everything you’ve written, as my thoughts on the practical applications align so closely. This will definitely serve as a valuable reference point for me moving forward. It…