Transmittance and diffusivity of volumetric light diffusers

被引：0
|
作者：
机构：
[1] Department of Physics, Jinan University, Guangzhou
[2] Guangzhou Research Institute of Opto-Electro-Mechanical Technology, Guangzhou
来源：
Tang, Z. (ttangzf@jnu.edu.cn) | 1600年 / Science Press卷 / 39期
关键词：
Diffusivity; Light diffuser; Numerical simulation; Scattering; Transmittance; Volume scattering;
D O I：
10.3788/CJL201239.s206001
中图分类号：
学科分类号：
摘要：
The transmittance and diffusivity are two key issues for light scattering materials but showing fairly sharp contradictions. A theoretical and computational model is derived to describe the volumetric diffusers based on multiple Mie scattering theory and Monte-Carlo methods. The scattering transmission processes of photons are simulated with statistic calculation to optimize the correlation between the optical performances and parameters, including relative refractive index, size, concentration of doped particles, geometrical structure of diffusers, and wavelength of the illumination source. It is found that, relative refractive index is the most sensitive parameter in above to get perfect diffusers, the optimized values are 0.91~0.97 or 1.03~1.09. The wavelength dispersion of transmittance and diffusivity can be fatherly eliminated and suppressed to meet the needs of practical applications.
引用
收藏
相关论文
共 18 条
  • [1] Kim G.H., A PMMA composite as an optical diffuser in a liquid crystal display backlight unit (BLU), European Polymer Journal, 41, 8, pp. 1729-1737, (2005)
  • [2] Kuo H.P., Chuang M.Y., Lin C.C., Design correlations for the optical performance of the particle-diffusing bottom diffusers in the LCD backlight unit, Powder Technology, 192, 1, pp. 116-121, (2009)
  • [3] Park G., Kim Y.G., Hoon Yi J., Et al., Enhanced of the optical performance by optimization of optical sheets in direct -illumination: LCD backlight, Journal of the Optical Society of Korea, 13, 1, pp. 152-157, (2009)
  • [4] Liu B.T., Teng Y.T., A novel method to control inner and outer haze of an anti-glare film by surface modification of the light scattering particles, Journal of Colloid and Interface Science, 350, 2, pp. 421-426, (2010)
  • [5] Kim G.H., Kim W.J., Kim S.M., Et al., Analysis of the thermo-physical and optical properties of a diffuser using PET/PC/PBT copolymer in LCD backlight units, Displays, 26, 1, pp. 37-43, (2005)
  • [6] Guo M., Xiong Y., Xu P., Et al., The morphology and optical of the PET optical diffusion films, Polymer Materials Science and Engineering, 26, 2, pp. 54-57, (2010)
  • [7] Chang S.I., Yoon J.B., Kim H., Et al., Microlens array diffuser for a light-emitting diode backlight system, Opt. Lett., 31, 20, pp. 3016-3018, (2006)
  • [8] Wang J.-H., Lien S.-Y., Ho J.-R., Et al., Optical diffusers based on silicone emulsions, Optical Materials, 32, 2, pp. 374-377, (2009)
  • [9] Meng Q., Guo A., Zhang Y., Et al., Lighting scattering property of PS/PMMA compounds, Optics and Precision Engineering, 17, 11, pp. 2646-2650, (2009)
  • [10] Sun C.C., Chien W.T., Moreno I., Et al., Calculating model of light transmission efficiency of diffusers attached to a lighting cavity, Opt. Express, 18, 6, pp. 6137-6148, (2010)
12