Calculation of reflection⁃absorption loss of light distribution elements in illumination system

KANG Xueliang; CHE Xinrui; XUE Rui; WANG Li; ZHANG Bai; WEI Xiantao

doi:10.3969/j.issn.1007-5461.2024.02.008

Chinese Journal of Quantum Electronics, Volume. 41, Issue 2, 257(2024)

Calculation of reflection⁃absorption loss of light distribution elements in illumination system

KANG Xueliang1... CHE Xinrui1, XUE Rui1, WANG Li1,2, ZHANG Bai1,* and WEI Xiantao3 |Show fewer author(s)

Author Affiliations

¹School of Electrical & Information Engineering, North Minzu University, Yinchuan 750021, China

²School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China

³School of Physics, University of Science and Technology of China, Hefei 230026, China

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Figures & Tables(10)

Fig. 1. Reflection-absorption loss model of free-form surface light distribution lens

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Fig. 2. Collimation principle of TIR lens. (a) Entirety; (b) Edge part

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Fig. 3. Light distribution lens with different collecting angles. (a) 30^°; (b) 60^°

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Fig. 4. TIR light distribution lens

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Fig. 5. Photos of light distribution lens. (a) Plane-convex lens; (b) TIR lens

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Fig. 6. Illuminance plot of spot in experiment. (a) Plane-convex lens; (b) TIR lens

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Table 1. Comparison between calculated value of reflection⁃absorption loss model and simulated value ofplano⁃convex collimating lens

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Table 1. Comparison between calculated value of reflection⁃absorption loss model and simulated value ofplano⁃convex collimating lens

Collecting angle of lens		30°	60°
Incident flux ϕ/lm		25.00	75.00
Reflection loss of front surface Δϕ₁/lm	Calculated value	1.47	5.08
Reflection loss of front surface Δϕ₁/lm	Simulated value	——	——
Absorption loss of material Δϕ₁΄ /lm	Calculated value	4.33	24.93
Absorption loss of material Δϕ₁΄ /lm	Simulated value	——	——
Reflection loss of rear surface Δϕ₂ /lm	Calculated value	1.06	3.84
Reflection loss of rear surface Δϕ₂ /lm	Simulated value	——	——
Outgoing flux ϕ₂ /lm	Calculated value	18.13	41.15
Outgoing flux ϕ₂ /lm	Simulated value	17.97	40.63
Total loss Δϕ /lm	Calculated value	6.87	33.85
Total loss Δϕ /lm	Simulated value	7.03	34.37
Transmissivity	Calculated value	72.52%	54.87%
	Simulated value	71.89%	54.17%
	Absolute error	0.62%	0.70%

Table 2. Comparison of transmissivity of plano⁃convex collimating lens with different light source radius
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Table 2. Comparison of transmissivity of plano⁃convex collimating lens with different light source radius
Source radius/mm Calculated transmissivity Simulated transmissivity Absolute error
0.001 54.87% 54.17% 0.70%
0.5 54.87% 54.10% 0.77%
1 54.87% 54.02% 0.85%
2 54.87% 53.79% 1.08%
4 54.87% 51.83% 3.04%

Table 3. Comparison between calculated value of reflection⁃absorption loss model and simulated value of TIR lens

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Table 3. Comparison between calculated value of reflection⁃absorption loss model and simulated value of TIR lens

	Calculated value	Simulated value
Reflection loss of front surface Δϕ₁/lm	11.08	——
Absorption loss of material Δϕ₁΄ /lm	52.16	——
Reflection loss of rear surface Δϕ₂ /lm	2.31	——
Outgoing flux ϕ₂ /lm	34.45	34.31
Total loss Δϕ /lm	65.55	65.69
Transmissivity	34.45%	34.31%

Table 4. Comparison of calculated， simulated and measured transmissivity of plano⁃convex lens and TIR lens
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Table 4. Comparison of calculated， simulated and measured transmissivity of plano⁃convex lens and TIR lens
Lens type Calculated value Simulated value Measured value Absolute error
Plane-convex 91.44% 90.02% 84.06% 7.38%
TIR 82.58% 82.22% 80.14% 2.44%

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Xueliang KANG, Xinrui CHE, Rui XUE, Li WANG, Bai ZHANG, Xiantao WEI. Calculation of reflection⁃absorption loss of light distribution elements in illumination system[J]. Chinese Journal of Quantum Electronics, 2024, 41(2): 257

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Paper Information

Category:

Received: Oct. 4, 2022

Accepted: --

Published Online: Jun. 24, 2024

The Author Email: ZHANG Bai (zhangbai6402@163.com)

DOI:10.3969/j.issn.1007-5461.2024.02.008

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Comparison between calculated value of reflection⁃absorption loss model and simulated value ofplano⁃convex collimating lens

Table 1. Comparison between calculated value of reflection⁃absorption loss model and simulated value ofplano⁃convex collimating lens

Table 2. Comparison of transmissivity of plano⁃convex collimating lens with different light source radius

Table 2. Comparison of transmissivity of plano⁃convex collimating lens with different light source radius

Table 3. Comparison between calculated value of reflection⁃absorption loss model and simulated value of TIR lens

Table 3. Comparison between calculated value of reflection⁃absorption loss model and simulated value of TIR lens

Table 4. Comparison of calculated， simulated and measured transmissivity of plano⁃convex lens and TIR lens

Table 4. Comparison of calculated， simulated and measured transmissivity of plano⁃convex lens and TIR lens

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