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Abstract In order to improve the illumination uniformity and intensity of the LED light source for plant growth, in this study, the three kinds of arrangement patterns of LED light source beads were designed by Tracepro optical simulation software. And the arrangement schemes of equal spacing and arithmetic progression were constructed, and the best lamp bead arrangements were presented by comparing with the uniformity and the light intensity of every scheme. The simulation results showed that the arrangement and combination schemes had a certain influence on the irradiance and uniformity, and the uniformity of the light source of the double-line arrangement with the SA40 was higher than other methods. In order to verify the reliability of the arrangement, a real experiment was setup based on the simulation optimal result(SA40 double-line), the light source of the single-line arrangement(CK30) and the traditional LED white light was used as the control group to build illumination platforms combined with 6 light sources. The uniformity of the three sets of light sources was measured at a distance of 150 mm. The experimental results showed that the illumination uniformity of the double-line arrangement of SA40 had a good performance with 88.93% uniformity that the arrangement parameters were reasonable.
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Received: 18 September 2020
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2020, Vol. 33 
