20.500.12556/RUL-107466 Compact UV LED lamp with low heat emissions for biological research applications 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. UV lamp LED UVA UVB incubator bioassay UV svetilka svetleče diode UVB inkubator biološki testi true false true Angleški jezik Slovenski jezik Članek v reviji 2019-04-17 10:10:11 2019-04-17 10:10:12 2022-08-19 03:49:36 0000-00-00 00:00:00 2019 0 0 18 str. iss. 3, art. 343 Vol. 8 Mar. 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.383.51 2079-9292 10.3390/electronics8030343 12414804 523068953 RAZ_Pirc_Matija_2019.pdf RAZ_Pirc_Matija_2019.pdf 1 FF3DD51C8A3823D07CA3118B9EA56DFB 51b0f0e1445eed7fa0bc97920c6d450e54af40d97854b6e81042cde9dff4fea8 bbad4ebf-31ac-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149878 https://www.mdpi.com/2079-9292/8/3/343 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=118287 Fakulteta za elektrotehniko Medicinska fakulteta 0 0 0