Design and Analysis of Cylindrical Rear-Projection System

• Main Authors: Chih-Chieh Yu, 游志傑
• Other Authors: Jyh-Long Chern
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/48749378602508767617

碩士 === 國立交通大學 === 光電工程系所 === 95 === The main concern of this thesis study is circular projection: how to analyze and design? In literature panoramic imaging systems have been addressed for decades and the corresponding technique of panorama image taking has been well developed. However, once we want to project a cylindrical image, many new difficult issues, e.g. screen parallel to optical axis, remain unsolved. By reference to classical panoramic imaging lenses, we developed three kinds of lens design for circular projection, in which, mainly, two reflective surfaces are embedded to extend the projection ranges. To properly project a common rectangular source into a circular image, we convert the panoramic image to circular-projection source. After this proper projection, we will get a cylindrical image with good quality. On the other hand, circular projection has unique method to determine the distortion. The distortion is calculated from the error of the ray-intersects to the ideal position in meridian plane. Our projection-lenses have 4% distortion.