Dispersive effects on a diffractive optical element

Seongmin Im; Gwiyeong Moon; Donghyun Kim

doi:10.1117/12.2578095

5 March 2021 Dispersive effects on a diffractive optical element

Seongmin Im, Gwiyeong Moon, Donghyun Kim

Author Affiliations +

Proceedings Volume 11680, Physics and Simulation of Optoelectronic Devices XXIX; 116801C (2021) https://doi.org/10.1117/12.2578095
Event: SPIE OPTO, 2021, Online Only

Conference Poster

Abstract

In this study, we investigate dispersive effects of a wire-grid polarizer (WGP) in imaging polarimetry. Dispersion in periodic structures such as WGP may cause dispersive misregistration in images captured in the far-field imaging system. As a measure of performance, we defined off-axis non-uniformity (NT_off) and extinction ratio (ER_off) to evaluate non-uniformity induced by off-axis imaging scene. Similarly, we considered metrics to evaluate dispersive effects as wavelength-dependent non-uniformity in extinction ratio (NERλ) and transmittance (NTλ). Significant non-uniformity in the performance of a WGP was measured: the highest non-uniformity was obtained as |NT_off|_max = 0.93211 at Λ = 400 nm and |NER_off|_max = 0.93624 at Λ = 600 nm, while |NT_λ|_max = 0.84935 at Λ = 400 nm and |NER_λ|_max = 0.90139 at Λ = 300 nm. We also present images in imaging polarimetry that suffers from dispersive effects.

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Seongmin Im, Gwiyeong Moon, and Donghyun Kim "Dispersive effects on a diffractive optical element", Proc. SPIE 11680, Physics and Simulation of Optoelectronic Devices XXIX, 116801C (5 March 2021); https://doi.org/10.1117/12.2578095

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