Open AccessSuper spectral resolution beyond pixel Nyquist limits on multi-channel spectrometer
Author(s) -
Tsuyoshi Konishi,
Yoshihiro Yamasaki,
T. Nagashima
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.026583
Subject(s) - nyquist frequency , optics , nyquist–shannon sampling theorem , pixel , spectrometer , spectral resolution , physics , resolution (logic) , image resolution , robustness (evolution) , spectral imaging , computer science , bandwidth (computing) , spectral line , telecommunications , artificial intelligence , computer vision , biochemistry , chemistry , astronomy , gene
Enhancement of the resolution of well-distributed multi-channel spectrometers beyond the pixel Nyquist limits while maintaining their inherent advantages such as high-speed measurement, compactness, and robustness will represent a critical step toward real-time monitoring of dynamic events. Here, we report the first super spectral resolution measurement beyond pixel Nyquist limits which was made possible by employing the Moiré effect in a commercially available Czerny-Turner type spectroscope of 4.63nm-spectral resolution. The experimental results show that the spectral resolution can be enhanced up to 0.31 nm by a factor of more than 10 with exceeding the 50-μm pixel Nyquist limits.