High Throughput AOTF Hyperspectral Imager for Randomly Polarized Light

被引：29

作者：

Abdlaty, Ramy ^{[1
,4
]}

Orepoulos, John ^{[2
]}

Sinclair, Peter ^{[2
]}

Berman, Richard ^{[2
]}

Fang, Qiyin ^{[1
,3
]}

机构：

[1] McMaster Univ, Sch Biomed Engn, Hamilton, ON L8S 4K1, Canada

[2] Spectral Appl Res Inc, Richmond Hill, ON L4B 2N3, Canada

[3] McMaster Univ, Dept Engn Phys, Hamilton, ON L8S 4K1, Canada

[4] Mil Tech Coll, Dept Biomed Engn, Cairo, Egypt

来源：

PHOTONICS | 2018年 / 5卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

hyperspectral imaging; AOTF; LCTF; optical throughput; TUNABLE FILTERS; FOOD QUALITY; SECURITY;

D O I：

10.3390/photonics5010003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The acousto-optic tunable filter (AOTF) is one of the most used techniques for hyperspectral imaging (HSI), and is capable of fast and random wavelength access, high diffraction efficiency, and good spectral resolution. Typical AOTF-HSI works with linearly polarized light; hence, its throughput is limited for randomly polarized applications such as fluorescence imaging. We report an AOTF-based imager design using both polarized components of the input light. The imager is designed to operate in the 450 to 800 nm region with resolutions in the range of 1.5-4 nm. The performance characterization results show that this design leads to 68% improvement in throughput for randomly polarized light. We also compared its performance against a liquid crystal tunable filter (LCTF)-based imager.

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