Earticle

Recently, context-awareness technology is commonly used in various fields such as detection of objects, persons, and smoke using visible infrared laser. During laser light acquisition process between source and receiver, blockage and attenuation events should be considered. The focus alignment upon receiver plays an important role in the acquisition process so that, In this paper, focus alignment algorithm of infrared laser in distant (min. 100m) is developed and implemented by visible infrared laser based image processing technique and a high-precision control method for auto-focus alignment system using extracted features between transmitters and receiver local oscillators. The present method allows various laser embedded devices using proposed alignment system for deviation in response to the external environment and initial setting for the smoke detection.