Mie Theory And Optical Specialty Of Bubbles In Water

In recent years, guided weapon has been widely applied in the war, Meanwhile, the technology of electronic countermeasure and sonar countermeasure are developing with rapid speed. The torpedo of accurate guiding is becoming the main weapon in the modern marine war, but with anti-guidance technical development, microwave guidance technique and sonar guidance technique has gradually been out of action. So research and developing a new guidance technique are very important for guided weapon. In this paper, we researched the optical specialty of bubbles in water, the research purpose has broken a new ground for guidance technique of torpedo, the aim is mastering wake stream's optical specialty. This paper discussed the difference of optical specialty between wake stream and seawater. Further to engineer optical-guided torpedo, in order to make conventional anti-guidance techniques of no use anymore.This paper discussed optical scattering of single bubble and used Mie theory analysis for single bubble. First, theoretical studies for Mie theory, and then simulated the physical model of single bubble by computer, and found the relation of optical scattering between single bubble's diameter and index of refraction. In this foundation,we discussed the optical scattering of a cloud of bubbles to move forward in a single step.This paper discussed the change of light-intensity and the decay of luminous-energy in different conditions.And finally, metered the cloud of bubbles'luminous-energy decayed in different conditions by experiment.In this paper, we have built the lab for optical scattering of cloud-bubbles in the water, The lab is made up by computer, illumination meter, data acquisition card, trough, air pump and stoneware pipe of micro porosity, we collected datas of illumination in different conditions and contrasted the datas to make analysis.We can see, in pace with air pressure imported up, the diameter of single bubble is bigger than before, and the output luminous-energy is less than before.In such phenomenon could explain the optical specialty of bubbles in water.