Compact UV LED lamp with low heat emissions for biological research applications

Pirc, Matija (author), Caserman, Simon (author), Ferk, Polonca (author), Topič, Marko (author)

Much biomedical research focuses on the effects of UV light on human cells. UV light sources are a prerequisite for such research. This paper presents the design and achieved performance of a UVA (Ultraviolet A: 320–400 nm) and a UVB (Ultraviolet B: 290–320 nm) LED-based lamp suitable for use in bioassays, as well as inside an incubator. Numerical simulations were used to optimise the number, layout and output power of LEDs to achieve good irradiance homogeneity while maintaining low costs. Design was optimised for the efficient transfer of generated heat away from the irradiated samples through the heatsink at the back of the lamps. The average irradiance of the target surface by the UVA lamp was 70.1 W/m$^2$ with a maximum deviation of 4.9%, and the average irradiance by the UVB lamp was 3.1 W/m$^2$ with a maximum deviation of 4.8%. With the UVA and UVB lamps, the temperature of samples undergoing irradiation in the incubator rises from 37 to 42 °C within 40 and 67 min, respectively. This by far exceeds the required UV irradiation time in most cases. Tests on Jurkat and HEK-293 cell cultures confirmed the suitability of our lamps for biomedical research.

• Language: English
• Keywords: UV lamp, LED, UVA, UVB, incubator, bioassay
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering; MF - Faculty of Medicine
• Publication status: Published
• Publication version: Version of Record
• Year: 2019
• Number of pages: 18 str.
• Numbering: Vol. 8, iss. 3, art. 343
• PID: 20.500.12556/RUL-107466
• UDC: 621.383.51
• ISSN on article: 2079-9292
• DOI: 10.3390/electronics8030343
• COBISS.SI-ID: 12414804
• Publication date in RUL: 17.04.2019

Record is a part of a journal

• Title: Electronics
• Shortened title: Electronics
• Publisher: MDPI
• ISSN: 2079-9292
• COBISS.SI-ID: 523068953

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 21.03.2019

Secondary language

• Language: Slovenian
• Keywords: UV svetilka, svetleče diode, UVB, inkubator, biološki testi

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0197
• Name: Fotovoltaika in elektronika