Design Of Airborne UVA High Zoom Ratio And Continuous Zoom TV System

The TV imaging system is one of the mostly resorts in tracking and measuring the flying targets for UVA. It can automatically track and measure the far target and close big target. The target get across the optical system and imaging to the CCD incept surface, after photoelectricity transform, output the target image on the TV screen finally. At the time of track, it hope that with long focus length and little field for the track distance and precision, but at the time of capture and observe, it hope that with short focus length and big filed. The fixed-focus lens system can not meet therequest, and that the discontinuous zoom system is easy to lose the target image at theprocess of changing focus. So in this paper, a continuous zoom TV is adopted, it has good ability to search, find, identify and track object.In this paper, firstly review the history of the zoom system developing, discuss zoom structure form and zoom method of development, following rehash zoom lens design, analyze the Gaussian optics and discuss the theory of zoom lens design. Then according as the design requests, calculate the parameters of lens, solve the original configuration, and work out a23mm-460mm zoom lens, study the aberration theory, present the design result. The analysis of the Spot diagram and MTF show that the zoom system can meet the requirement. In the end, research the cam’s curve of zoom lens, and choose the CCD matching zoom system. By analyzing, measurement and outfield experiment, the result is satisfied with the requirement.