Development of a compact broadband circular dichroism spectropolarimeter for circular polarizer applications

Yi Chen; Chao Kuei Lee; Chun Ta Wang; Shie Chang Jeng

doi:10.1016/j.optlaseng.2023.107480

Development of a compact broadband circular dichroism spectropolarimeter for circular polarizer applications

Yi Chen, Chao Kuei Lee^*, Chun Ta Wang, Shie Chang Jeng

^*Corresponding author for this work

Institute of Imaging and Biomedical Photonics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A compact circular dichroism (CD) spectropolarimeter is demonstrated in this study. The system utilizes liquid crystal polarization gratings (LCPGs) and mini spectrometers to analyze the ellipticity spectra of polarized light. The residual spectra of the LCPG from the opposite diffraction order are subtracted to improve measurement accuracy by almost one order of magnitude. The novel CD spectropolarimeter is applied to inspect the quality of a commercial circular polarizer (CP), and the results are compared with those obtained with a commercial CD spectropolarimeter. The measurement accuracy of our system is determined to be around 0.3°. The results show that our design is feasible to produce a compact and low-cost CP inspection apparatus.

Original language	English
Article number	107480
Journal	Optics and Lasers in Engineering
Volume	163
DOIs	https://doi.org/10.1016/j.optlaseng.2023.107480
State	Published - Apr 2023

Keywords

Accuracy
Circular dichroism
Circular polarizer
Ellipticity
Liquid crystal polarization grating
Residue

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10.1016/j.optlaseng.2023.107480

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title = "Development of a compact broadband circular dichroism spectropolarimeter for circular polarizer applications",

abstract = "A compact circular dichroism (CD) spectropolarimeter is demonstrated in this study. The system utilizes liquid crystal polarization gratings (LCPGs) and mini spectrometers to analyze the ellipticity spectra of polarized light. The residual spectra of the LCPG from the opposite diffraction order are subtracted to improve measurement accuracy by almost one order of magnitude. The novel CD spectropolarimeter is applied to inspect the quality of a commercial circular polarizer (CP), and the results are compared with those obtained with a commercial CD spectropolarimeter. The measurement accuracy of our system is determined to be around 0.3°. The results show that our design is feasible to produce a compact and low-cost CP inspection apparatus.",

keywords = "Accuracy, Circular dichroism, Circular polarizer, Ellipticity, Liquid crystal polarization grating, Residue",

author = "Yi Chen and Lee, {Chao Kuei} and Wang, {Chun Ta} and Jeng, {Shie Chang}",

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doi = "10.1016/j.optlaseng.2023.107480",

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AU - Chen, Yi

AU - Lee, Chao Kuei

AU - Wang, Chun Ta

AU - Jeng, Shie Chang

PY - 2023/4

Y1 - 2023/4

N2 - A compact circular dichroism (CD) spectropolarimeter is demonstrated in this study. The system utilizes liquid crystal polarization gratings (LCPGs) and mini spectrometers to analyze the ellipticity spectra of polarized light. The residual spectra of the LCPG from the opposite diffraction order are subtracted to improve measurement accuracy by almost one order of magnitude. The novel CD spectropolarimeter is applied to inspect the quality of a commercial circular polarizer (CP), and the results are compared with those obtained with a commercial CD spectropolarimeter. The measurement accuracy of our system is determined to be around 0.3°. The results show that our design is feasible to produce a compact and low-cost CP inspection apparatus.

AB - A compact circular dichroism (CD) spectropolarimeter is demonstrated in this study. The system utilizes liquid crystal polarization gratings (LCPGs) and mini spectrometers to analyze the ellipticity spectra of polarized light. The residual spectra of the LCPG from the opposite diffraction order are subtracted to improve measurement accuracy by almost one order of magnitude. The novel CD spectropolarimeter is applied to inspect the quality of a commercial circular polarizer (CP), and the results are compared with those obtained with a commercial CD spectropolarimeter. The measurement accuracy of our system is determined to be around 0.3°. The results show that our design is feasible to produce a compact and low-cost CP inspection apparatus.

KW - Accuracy

KW - Circular dichroism

KW - Circular polarizer

KW - Ellipticity

KW - Liquid crystal polarization grating

KW - Residue

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SN - 0143-8166

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JO - Optics and Lasers in Engineering

JF - Optics and Lasers in Engineering

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Development of a compact broadband circular dichroism spectropolarimeter for circular polarizer applications

Abstract

Keywords

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