Image acquisition and processing and instrument control based on virtual instrument

In order to measure the three-light-axis parallelity of laser telemeter, we use CCD to get laser spot image and then capture and process the image to calculate the position error between the center of white light cross line and that of the spot and explain selected image processing arithmetics. Besides, different attenuators are applied to measure the sensitivity of receiver. We select Lab VIEW as software to develop virtual instrument systems to gain the center of laser axis and control the attenuator. This system is intuitionistic and convenient to use and can be reused in different applications.