Experimental investigation of the 2D diffractive optical element for speckle reduction efficiency dependence on its speed and inclination angle

• Дата: 2015
• Автори: Prygun, A. V., Lapchuk, A. S., Pashkevich, G. A., Borodin, Yu. O.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут проблем реєстрації інформації НАН України 2015
• Теми: laser projector; speckle; noise; speckle suppression; diffractive optical element; Barker code; experiment; speed; direction; inclination angle; лазерный проектор; спеклы; шумы; подавление спеклов; дифракционный оптическийй элемент; код Баркера; эксперимент; скорость; направление; угол наклона; лазерний проектор; спекли; шум; зменшення спеклів; дифракційний оптичний елемент; експеримент; швидкість; напрямок; кут нахилу
• Онлайн доступ: http://drsp.ipri.kiev.ua/article/view/100323
• Назва журналу: Data Recording, Storage & Processing

Speckle suppression efficiency by moving 2D diffractive optical element based on a pseudo-random Barker code binary sequence is investigated. Experimental data of speckle contrast dependence on laser radiation wavelength, on the diffractive structure height, on the speed of its movement, as well as on the angle between the direction of diffractive structure wedges and diffractive optical element movement are presented. The coefficient of speckle suppression coefficient (ratio of speckle contrast before and after the method application) of 14, 16 and 3 for the wavelengths of 632,8 nm, 532 nm and 405 nm is obtained respectively. The obtained experimental data reaffirm the high efficiency of the method of speckle suppression. Tabl.: 2. Fig.: 7. Refs: 7 titles.