Zefeng FENG, Peipei WANG, Xu YANG, Hu LIU, Daxi XIONG. Evaluation of light penetration of LED phototherapy apparatus in skin[J]. Optics and Precision Engineering, 2022, 30(10): 1139
- Optics and Precision Engineering
- Vol. 30, Issue 10, 1139 (2022)
Fig. 1. Skin stratification model
Fig. 2. Absorption coefficient of Hb， HbO2 and H2O
Fig. 3. Relationship between absorption coefficient and wavelength
Fig. 4. Relationship between reduced scattering coefficient and wavelength
Fig. 5. Monte Carlo simulation process
Fig. 6. Photon coordinate initialization
Fig. 7. Penetration of three wavelengths
Fig. 8. Depth of light penetrating the skin
Fig. 9. Photon deposition rate distribution
Fig. 10. Actual optical path diagram
Fig. 11. Schematic diagram of different beam incidence
Fig. 12. Divergent light incidence diagram
Fig. 13. Comparison of penetration depth of four skin model
Fig. 14. Comparison of penetration depth with different divergence angles
Fig. 15. Comparison of relative photon injection rate of target with different divergence angles
Fig. 16. Comparison of relative injection rate of each layer
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Table 1. Reduced scattering coefficient fitting equation parameters
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Table 2. Sample tissue parameters
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Table 3. Skin parameters of shoulder， forearm dorsal and buttock
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