Title of article :
The Effect of Spot Size on the Fractal Optical Modulation
Author/Authors :
Mohammad, A. A S University of Baghdad - College of Education Ibn Al-Haitham - Department of Physics, Iraq , Harby, K. H University of Baghdad - College of Education Ibn Al-Haitham - Department of Physics, Iraq , Al-Aish, T.A. K University of Baghdad - College of Education Ibn Al-Haitham - Department of Physics, Iraq
Abstract :
The present paper analyzes the signal emitting from the Reticle during changing the spot size of laser falling on the disk and shows the optimum frequency and the amount of energy window in different p atterns of modulator (Reticle). All results are obtained by establishing a sp ecial program named “Disk optical modulator version 3 using the language visual basic 6 ahich contains many parameters. All models of optical modulator consist of twenty sectors, ten sectors are opaque and other ten sectors are transmitted for the laser. The number of sectors depends on several factors as chopping frequency, power transparent and modulation transfer function. It has been demonstrated by simulations, the optimal value of modulation transfer function is achieved when sp ot size of laser 0.3 mm and any increasing in sp ot size lead to decrease in MTF value
Keywords :
Fractal Op tical Modulator , Chopping frequency , Spot size , power transparent , the Modulation Transfer Function MTF
Journal title :
Ibn Alhaitham Journal For Pure and Applied Science
Journal title :
Ibn Alhaitham Journal For Pure and Applied Science
