Super-resolution for a dispersive spectrometer using a tilted area sensor and spectrally varying blur kernel interpolation

• Kazuya Kitano

• Takuya Funatomi

• Ryohei Yasukuni

• Kenichiro Tanaka

• Hiroyuki Kubo

• Yoichiroh Hosokawa

• Yasuhiro Mukaigawa

Abstract

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.

Journal

• Optics Express

  Optics Express 29 (2), 2809-, 2021-01-15

  Optica Publishing Group

Keywords

• Atomic and Molecular Physics, and Optics

Details

• CRID: 1360853567642073984
• NII Article ID: 120006959885
• DOI: 10.1364/oe.414479
• ISSN: 10944087
• Web Site: https://opg.optica.org/viewmedia.cfm?URI=oe-29-2-2809
• Web Site: https://opg.optica.org/viewmedia.cfm?URI=oe-29-2-2809&seq=0
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