Open AccessSuper-resolution for a dispersive spectrometer using a tilted area sensor and spectrally varying blur kernel interpolation
Author(s) -
Kazuya Kitano,
Takuya Funatomi,
Ryohei Yasukuni,
Kenichiro Tanaka,
Hiroyuki Kubo,
Yoichiroh Hosokawa,
Yasuhiro Mukaigawa
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.414479
Subject(s) - subpixel rendering , optics , spectrometer , spectral resolution , resolution (logic) , grating , image resolution , interpolation (computer graphics) , image sensor , lens (geology) , imaging spectrometer , physics , computer science , pixel , computer vision , artificial intelligence , spectral line , image (mathematics) , astronomy
The grating, lens, and linear sensor determine a spectrometer's wavelength resolution and measurement range. While conventional methods have tried to improve the optical design to obtain a better resolution, they have a limitation caused by the physical property. To improve the resolution, we introduce a super-resolution method from the computer vision field. We propose tilting an area sensor to realize accurate subpixel shifting and recover a high-resolution spectrum using interpolated spectrally varying kernels. We experimentally validate that the proposed method achieved a high spectral resolution of 0.141nm in 400-800nm by just tilting the sensor in the spectrometer.