Evaluation of the uniformity of UVA LED illumination on flat surfaces: Discrete ordinate method, single axis, and surface scanning radiometry

Evaluation of the uniformity of UVA LED illumination on flat surfaces: Discrete ordinate method, single axis, and surface scanning radiometry

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Uniform illumination from UVA LED lamps is a crucial design characteristic for a range of industries including photocatalytic applications.In this work, radiometry and the discrete ordinate method (DOM) are used to determine the ideal target surface size and working distance from a UVA LED lamp for highly uniform illumination.Horizontal incident radiation and full surface incident radiation measurements were conducted using a scanning radiometry technique.

It is shown that horizontal incident and full surface incident radiation measurements show good agreement read more for uniformity measurements over a range of working distances, with maximum uniformity (2.6% and 3.6% standard deviation respectively) over the measured range found at 15 mm working distance.

DOM simulation results showed good agreement with radiometry for power and incident radiation measurements, whilst indicating a maximum uniformity at 20 mm working distance.These results demonstrate that DOM simulations can royal nomadic 5413 rug be used as a fast, low cost, and reliable indication of surface uniformity, peak surface irradiance, and power measurements in the design of UV lamps for industrial and academic applications.