Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/8773
Title: Fabrication of liquid-crystal retarders for solar polarimetry: A facile method
Authors: Phanindra, D. V. S
Greeshma, L. S
Vincent, Della
Raees, Muhammed
Nagaraju, K
Hegde, Gurumurthy
Sreekumar, P
Namboothiry, Manoj A. G
Keywords: Polarimetry
LCVR
Fabrication
Issue Date: Dec-2025
Publisher: Springer Nature
Citation: Journal of Astrophysics and Astronomy, Vol. 46, No. 2, 43
Abstract: A high-precision polarimeter for simultaneous multi-line spectropolarimetric Sun observations is under development at Indian Institute of Astrophysics. Towards this end, we plan to use liquid-crystal retarders as the polarization modulators. A prototype liquid-crystal variable retarder (LCVR) is fabricated and characterized. A solution-processed method is adapted to fabricate the LCVR using commercially available E7 nematic liquid-crystal material. Thickness of the alignment layer of the LC retarder was optimized to achieve uniformity. The fabricated LCVR demonstrates spatial uniformity of retardance comparable to a commercial waveplate. The device is found to have a low-range of operational voltage of <20 V and a very short response time of <1 ms. Also, the device shows consistent operational stability.
Description: Restricted Access
The original publication is available at springerlink.com
URI: http://hdl.handle.net/2248/8773
ISSN: 0973-7758
Appears in Collections:IIAP Publications

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