Инд. авторы:	Lenkova G.A.
Заглавие:	High-Efficiency Diffractive Focusing Deflecting Element
Библ. ссылка:	Lenkova G.A. High-Efficiency Diffractive Focusing Deflecting Element // Optoelectronics, Instrumentation and Data Processing. - 2015. - Vol.51. - Iss. 6. - P.560-567. - ISSN 8756-6990. - EISSN 1934-7944.
Внешние системы:	DOI: 10.3103/S8756699015060059; SCOPUS: 2-s2.0-84961308474; WoS: 000421015300005;
Реферат:	eng: The shape of the diffractive structure of a deflecting kinoform element designed for focusing high-power laser beams with a wavelength of 10.6 mu m is studied. Formulas are derived for calculating light losses induced by tilting of the incident beam, diffraction, and technological blurring of the steep slope of the structure. It is demonstrated that the height of the structure varies from the minimum to the maximum value depending on the azimuthal angle. It is found that light loss induced by shadowing due to oblique incidence of the beam is rather low (0.6-1.3%), and that caused by diffraction is smaller by an order of magnitude and can be neglected. The light losses induced by technological blurring of the slope and by deviation of the structure height from the design value (in the case of violation of the azimuthal dependence) can exceed 10%.
Ключевые слова:	light loss; efficiency; diffractive structure; deflecting focusing element;
Издано:	2015
Физ. характеристика:	с.560-567