Ultraviolet-visible imaging spectropolarimeter spectral modulation module design

Tao Wang; Maoxin Song; Yadong Hu; Xiangjing Wang; Mengfan Li

doi:10.1117/12.3049759

18 November 2024 Ultraviolet-visible imaging spectropolarimeter spectral modulation module design

Tao Wang, Maoxin Song, Yadong Hu, Xiangjing Wang, Mengfan Li

Proceedings Volume 13398, Fourth International Conference on Optics and Communication Technology (ICOCT 2024); 1339812 (2024) https://doi.org/10.1117/12.3049759
Event: Fourth International Conference on Optics and Communication Technology (ICOCT 2024), 2024, Nanjing, China

Abstract

Spectral modulation polarization technology is a snapshot spectral polarization measurement technique without moving parts, offering high accuracy. Anhui Institute of Optics and Fine Mechanics has developed a prototype Ultraviolet-visible Imaging Spectropolarimeter. Prototype consists of a spectral modulation module, a telescope, and an Offner spectrometer, enabling dual-channel polarization imaging. The spectral modulation module uses Wollaston prisms for beam splitting, which has the disadvantage of asymmetric splitting angles, reducing the matching accuracy of the dual-channel polarized images. Therefore, it is necessary to analyze the imaging asymmetry caused by the prism wedge angle and determine the range for the wedge angle. To converge the dual-channel polarized beams after Wollaston prisms at the spectrometer slit, a telescope with F-number of 5 was designed. To verify the dual-channel imaging performance of the system, an overall analysis was conducted with the spectrometer, ensuring a modulation transfer function greater than 0.4 for each spectral and the specifications met the design requirements.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Tao Wang, Maoxin Song, Yadong Hu, Xiangjing Wang, and Mengfan Li "Ultraviolet-visible imaging spectropolarimeter spectral modulation module design", Proc. SPIE 13398, Fourth International Conference on Optics and Communication Technology (ICOCT 2024), 1339812 (18 November 2024); https://doi.org/10.1117/12.3049759

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KEYWORDS

Polarization

Modulation

Prisms

Spectropolarimetry

Design

Aerosols

Ultraviolet radiation

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