Evaluation of a smartphone sensor to broadband and to narrow band ultraviolet A radiation

Igoe, D. and Parisi, A. V. (2015) Evaluation of a smartphone sensor to broadband and to narrow band ultraviolet A radiation. Instrumentation Science and Technology, 43 (3). pp. 283-289. ISSN 1073-9149

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Abstract

This research compares the smartphone image sensor response when exposed to broadband and narrow passband (340 nm and 380 nm) UVA wavelengths (320-400 nm) and builds on previous studies that have demonstrated that the smartphone image sensor is able to provide quantifiable response to narrow passband solar irradiances at 380 nm and 340 nm and can be used to reconstruct broadband UVA irradiances. This current research provides a comparison of the two main methods of ultraviolet irradiance observation and measurement, broadband and narrowband sensing, as applied to a common readily accessible smartphone. This research shows that the smartphone image sensor, with a broadband UVA filter possesses a strong sensitivity to long wavelength UVA irradiances from 370 nm, with a peak at 380 nm. However, the use of narrow passband and neutral density filters allows for quantifiable observations at the photobiologically important wavelength of 340 nm. Narrow passband filter observations also have far less variation at 340 nm than that observed for broadband measurements. The results indicate that the smartphone image sensor, with the addition of narrow passband and neutral density filters can be a viable tool for UVA observations, but is unsuitable for broadband measurements with a broadband filter.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2015 Taylor & Francis Group, LLC. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 11 May 2015 04:24
Last Modified: 06 Feb 2018 01:50
Uncontrolled Keywords: UV; smartphone; UVA; smartphone image sensor
Fields of Research : 02 Physical Sciences > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified
09 Engineering > 0906 Electrical and Electronic Engineering > 090605 Photodetectors, Optical Sensors and Solar Cells
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1080/10739149.2014.1002039
URI: http://eprints.usq.edu.au/id/eprint/27166

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