Design of Stereo LED Plant Light Source System with High Spatial Illumination Uniformity

Feiyu Jiao; Shangsheng Wen; Bingxu Ma; Bo Zhang; Xinyu Jiang; Yunle Lu; Weizhao Huang; Qibao Wu

doi:10.3788/AOS202040.1822002

Acta Optica Sinica, Volume. 40, Issue 18, 1822002(2020)

Design of Stereo LED Plant Light Source System with High Spatial Illumination Uniformity

Feiyu Jiao^1、*, Shangsheng Wen^1,2、*, Bingxu Ma¹, Bo Zhang¹, Xinyu Jiang¹, Yunle Lu¹, Weizhao Huang¹, and Qibao Wu³

Author Affiliations

¹College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China

²State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, Guangdong 510640, China

³School of Intelligent Manufacturing and Equipment, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China

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Figures & Tables(21)

Fig. 1. Spatial illumination uniformity evaluation system

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Fig. 2. Scheme structures of plant growth shelves. (a) Scheme I; (b) scheme II; (c) scheme III

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Fig. 3. Local section of plant growth shelf in scheme I and related parameters

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Fig. 4. Local section of plant growth shelf in scheme II and related parameters

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Fig. 5. Local section of plant growth shelf in scheme III and related parameters

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Fig. 6. S_N corresponding to each level of each factor in scheme I. (a) Illumination uniformity of horizontal plane; (b) illumination uniformity of vertical plane; (c) color-mixed uniformity of horizontal plane; (d) color-mixed uniformity of vertical plane

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Fig. 7. S_N corresponding to each level of each factor in scheme II. (a) Illumination uniformity of horizontal plane; (b) illumination uniformity of vertical plane; (c) color-mixed uniformity of horizontal plane; (d) color-mixed uniformity of vertical plane

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Fig. 8. S_N corresponding to each level of each factor in scheme III. (a) Illumination uniformity of horizontal plane; (b) illumination uniformity of vertical plane; (c) color-mixed uniformity of horizontal plane; (d) color-mixed uniformity of vertical plane

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Fig. 9. Variation of each attribute with factor A. (a) Illumination uniformity and color-mixed uniformity of horizontal plane;(b) illumination uniformity and color-mixed uniformity of vertical plane

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Fig. 10. Variation of each attribute with factor C. (a) Illumination uniformity and color-mixed uniformity ofhorizontal plane; (b) illumination uniformity and color-mixed uniformity of vertical plane

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Fig. 11. Optimal result of plant growth shelf. (a) Illumination map of horizontal plane; (b) chromaticity map of horizontal plane; (c) full color-mixed map of horizontal plane; (d) illumination map of vertical plane; (e) chromaticity map of vertical plane; (f) full color-mixed map of vertical plane

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Fig. 12. Plant growth model

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Fig. 13. Illumination uniformity and color-mixed uniformity at each plant height. (a) Illumination uniformity and color-mixed uniformity of planting plane; (b) illumination uniformity and color-mixed uniformity of plant top plane; (c) illumination uniformity and color-mixed uniformity of plant side plane

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Fig. 14. Array LED structure and uniformity properties. (a) Array LED structure; (b) illuminance uniformity of reference surface at each plant height; (c) illuminance distribution of vertical reference plane

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Table 1. Influence factors of plant growth shelf in scheme I and its control levels
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Table 1. Influence factors of plant growth shelf in scheme I and its control levels
Code Factor Number oflevels Value
1 2 3
A H 3 300 mm 400 mm 500 mm
B L 3 150 mm 200 mm 250 mm
C a 3 0.25 0.50 0.75
D l 3 10 mm 15 mm 20 mm

Table 2. Influence factors of plant growth shelf in scheme II and its control levels
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Table 2. Influence factors of plant growth shelf in scheme II and its control levels
Code Factor Number oflevels Value
1 2 3
A H 3 300 mm 400 mm 500 mm
B L 3 150 mm 200 mm 250 mm
C h 3 20 mm 30 mm 40 mm
D l 3 10 mm 15 mm 20 mm

Table 3. Influence factors of plant growth shelf in scheme III and its control levels
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Table 3. Influence factors of plant growth shelf in scheme III and its control levels
Code Factor Number of levels Value
1 2 3
A H 3 300 mm 400 mm 500 mm
B L 3 150 mm 200 mm 250 mm
C a 3 0.25 0.50 0.75
D h 3 20 mm 30 mm 40 mm
E l 3 10 mm 15 mm 20 mm

Table 4. L₉(3⁴) orthogonal experimental design in scheme I

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Table 4. L₉(3⁴) orthogonal experimental design in scheme I

Experiment No.	Level				Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane/%	Color-mixeduniformityof verticalplane /%
Experiment No.	A	B	C	D	Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane/%	Color-mixeduniformityof verticalplane /%
1	1	1	1	1	92.57	88.55	82.08	87.35
2	1	2	2	2	83.71	83.94	71.55	77.58
3	1	3	3	3	91.78	77.88	74.98	86.16
4	2	1	2	3	87.83	87.38	72.07	89.11
5	2	2	3	1	89.09	72.84	68.42	84.86
6	2	3	1	2	91.72	81.53	83.98	81.69
7	3	1	3	2	92.59	81.21	68.81	90.00
8	3	2	1	3	93.56	89.88	83.37	88.36
9	3	3	2	1	88.78	90.00	59.73	85.67

Table 5. L₉(3⁴) orthogonal experimental design in scheme II

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Table 5. L₉(3⁴) orthogonal experimental design in scheme II

Experiment No.	Level				Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
Experiment No.	A	B	C	D	Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
1	1	1	1	1	88.27	76.64	68.17	87.84
2	1	2	2	2	92.96	82.98	71.82	83.94
3	1	3	3	3	91.50	85.97	78.72	74.90
4	2	1	2	3	91.30	90.00	71.35	83.83
5	2	2	3	1	91.76	78.61	70.36	84.55
6	2	3	1	2	93.06	78.66	72.28	84.59
7	3	1	3	2	93.20	77.40	64.53	90.00
8	3	2	1	3	92.80	86.05	71.80	81.73
9	3	3	2	1	94.21	70.44	65.06	88.75

Table 6. L₁₈(3⁷) orthogonal experimental design in scheme III

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Table 6. L₁₈(3⁷) orthogonal experimental design in scheme III

ExperimentNo.	Level					Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
ExperimentNo.	A	B	C	D	E	Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
1	1	1	1	1	1	82.59	85.66	67.90	75.90
2	1	2	2	2	2	73.37	82.02	63.77	82.48
3	1	3	3	3	3	64.88	76.43	75.97	70.73
4	2	1	1	2	2	82.18	85.86	66.76	85.32
5	2	2	2	3	3	82.01	72.41	64.71	75.36
6	2	3	3	1	1	69.48	68.60	52.88	76.51
7	3	1	2	1	3	81.25	81.55	64.26	86.62
8	3	2	3	2	1	77.85	80.02	45.99	81.97
9	3	3	1	3	2	81.13	78.54	63.91	88.39
10	1	1	3	3	2	83.70	90.00	75.69	88.69
11	1	2	1	1	3	74.80	76.10	67.50	78.07
12	1	3	2	2	1	69.14	82.31	59.75	85.00
13	2	1	2	3	1	80.07	76.25	51.02	90.00
14	2	2	3	1	2	79.86	76.77	63.07	79.62
15	2	3	1	2	3	80.29	79.86	65.99	75.40
16	3	1	3	2	3	83.96	76.90	62.76	81.96
17	3	2	1	3	1	79.32	73.38	48.32	82.72
18	3	3	2	1	2	71.15	66.57	54.24	80.35

Table 7. Contribution of each factor to illumination uniformity and mixed-color uniformity

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Table 7. Contribution of each factor to illumination uniformity and mixed-color uniformity

Influencefactor	Contribution toilluminationuniformity ofhorizontal plane /%	Contribution toilluminationuniformity ofvertical plane /%	Contribution tocolor-mixeduniformity ofhorizontal plane /%	Contribution tocolor-mixeduniformity ofvertical plane /%
A	84.5605	11.4112	22.4169	24.5248
B	1.5093	1.4374	7.6414	28.1085
C	11.7121	71.7911	66.2481	21.2896
D	2.2181	15.3603	3.6936	26.0771

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Feiyu Jiao, Shangsheng Wen, Bingxu Ma, Bo Zhang, Xinyu Jiang, Yunle Lu, Weizhao Huang, Qibao Wu. Design of Stereo LED Plant Light Source System with High Spatial Illumination Uniformity[J]. Acta Optica Sinica, 2020, 40(18): 1822002

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Paper Information

Category: Optical Design and Fabrication

Received: Apr. 2, 2020

Accepted: Jun. 11, 2020

Published Online: Aug. 27, 2020

The Author Email: Jiao Feiyu (shshwen@scut.edu), Wen Shangsheng (shshwen@scut.edu)

DOI:10.3788/AOS202040.1822002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Influence factors of plant growth shelf in scheme I and its control levels

Table 1. Influence factors of plant growth shelf in scheme I and its control levels

Table 2. Influence factors of plant growth shelf in scheme II and its control levels

Table 2. Influence factors of plant growth shelf in scheme II and its control levels

Table 3. Influence factors of plant growth shelf in scheme III and its control levels

Table 3. Influence factors of plant growth shelf in scheme III and its control levels

Table 4. L9(34) orthogonal experimental design in scheme I

Table 4. L9(34) orthogonal experimental design in scheme I

Table 5. L9(34) orthogonal experimental design in scheme II

Table 5. L9(34) orthogonal experimental design in scheme II

Table 6. L18(37) orthogonal experimental design in scheme III

Table 6. L18(37) orthogonal experimental design in scheme III

Table 7. Contribution of each factor to illumination uniformity and mixed-color uniformity

Table 7. Contribution of each factor to illumination uniformity and mixed-color uniformity

Table 4. L₉(3⁴) orthogonal experimental design in scheme I

Table 4. L₉(3⁴) orthogonal experimental design in scheme I

Table 5. L₉(3⁴) orthogonal experimental design in scheme II

Table 5. L₉(3⁴) orthogonal experimental design in scheme II

Table 6. L₁₈(3⁷) orthogonal experimental design in scheme III

Table 6. L₁₈(3⁷) orthogonal experimental design in scheme III