Sensors 2018, 18(1), 314; https://doi.org/10.3390/s18010314
A Real-Time Ultraviolet Radiation Imaging System Using an Organic Photoconductive Image Sensor†
Panasonic Corporation, 1 Kotari-yakemachi, Nagaokakyo City, Kyoto 617-8520, Japan
†
This paper is an expanded version of our published paper: Okino, T.; Yamahira, S.; Yamada, S.; Hirose, Y.; Odagawa, A.; Kato Y.; Tanaka, T. Ultraviolet and Visible Spectral Imaging of Hydrogen Flames Using an Organic Photoconductive Film CMOS Imager. In Proceedings of the 2017 International Image Sensor Workshop, Hiroshima, Japan, 30 May–2 June 2017.
*
Author to whom correspondence should be addressed.
Received: 31 October 2017 / Revised: 12 January 2018 / Accepted: 18 January 2018 / Published: 22 January 2018
(This article belongs to the Special Issue Special Issue on the 2017 International Image Sensor Workshop (IISW))
Abstract
We have developed a real time ultraviolet (UV) imaging system that can visualize both invisible UV light and a visible (VIS) background scene in an outdoor environment. As a UV/VIS image sensor, an organic photoconductive film (OPF) imager is employed. The OPF has an intrinsically higher sensitivity in the UV wavelength region than those of conventional consumer Complementary Metal Oxide Semiconductor (CMOS) image sensors (CIS) or Charge Coupled Devices (CCD). As particular examples, imaging of hydrogen flame and of corona discharge is demonstrated. UV images overlapped on background scenes are simply made by on-board background subtraction. The system is capable of imaging weaker UV signals by four orders of magnitude than that of VIS background. It is applicable not only to future hydrogen supply stations but also to other UV/VIS monitor systems requiring UV sensitivity under strong visible radiation environment such as power supply substations. View Full-TextKeywords:
organic photoconductive film; CMOS image sensor; ultraviolet; hydrogen flame; corona discharge
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Okino, T.; Yamahira, S.; Yamada, S.; Hirose, Y.; Odagawa, A.; Kato, Y.; Tanaka, T. A Real-Time Ultraviolet Radiation Imaging System Using an Organic Photoconductive Image Sensor. Sensors 2018, 18, 314.
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