Relief parameters and angular distribution of light intensity for axisymmetric surface homogenizing structures

• Дата: 2020
• Автори: Antonov, E. E., Tokalin, O. A.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут проблем реєстрації інформації НАН України 2020
• Теми: micro-spherical diffuser; beam homogenization; transmittance; angular intensity distribution
• Онлайн доступ: http://drsp.ipri.kiev.ua/article/view/207749
• Назва журналу: Data Recording, Storage & Processing

A method for modeling the geometric parameters of a single micro-spherical structure has been developed, which allows calculating the required relief depth of a micro-spherical diffuser for a predetermined limit angle of deflection of the beam. The obtained depth (height) of the relief determines the maximum distance between adjacent spherical micro-projections on the forming surface of the diffuser, because too large a distance between individual microspheres leads to the appearance in the homogenized beam of unscattered central component, which is unacceptable in practical application of such diffusers.The angular dependences of the light beam transmission coefficients on the recess surface in the form of a paraboloid of rotation and a spherical segment are calculated. The results of calculations of the angular dependences of the transmission coefficients on the surface in the form of a paraboloid of rotation and in the form of a spherical segment, are calculated for the same ratios h/d = 0,10 and 0,15 for the refractive index ne = 1,5.The radial profile of homogenized beams for some diffusers manufactured in the IPRI of the NAS of Ukraine has been experimentally investigated. The reasons for the observed discrepancies between experimental and theoretical data on the angular distribution of the homogenized light beam are considered. These issues, in particular the partial overlap of the peripheral regions of micro-spherical elements in the process of indentation and the role of radiation diffraction, which can significantly change the radial distribution of radiation of a single micro-spherical element, will be discussed in more detail in our future studies. Fig.: 8. Refs: 6 titles.