光学精密工程2011，Vol.19Issue(5)：945-950,6.DOI:10.3788/OPE.20111905.0945
大屏背投激光显示广角镜头的设计
Design of large dimension and rear projecting lens in laser display system
摘要
Abstract
After comparing different structures of wide-angle projecting lenses, a wide-angle lens for 162.6 cm(64 in) rear projection laser display is designed. The focal length of the system is 7.38 mm,the wavelength used in the design is F, d, C and the full field of view reaches 100°. The technical indii of the projection lens are summarized as follows: DMD (Digital Micromirror Device) is used in the light digital processing, 90％ MTF is greater than 0. 6 at the Nyquist frequency; the barrel distortion of the system is smaller than 1.4％ ,and 90％ of the energy in the point target is focused in a pixel dimension. Furthermore,a right angle prism is used to fold the optical path to decrease the length of the lens,so that the whole optical length of the system is 259 mm after outspreading the right angle prism. The vignetting factor of the wide angle is negative, which enhances the image illumination after projection. Moreover, an aspheric surface with the small size, zero conic constant and the maximum eight order coefficient is used to promise the feasibility of the mounting. Analytical results show that the design can decrease the production costs of the projecting system and promote the technological industrialization.关键词
背投式激光显示系统/广角镜头/数字微镜晶片Key words
rear projection laser display system/ wide-angle lens/ Digital Micrmirror Device(DMD)分类
信息技术与安全科学引用本文复制引用
陈旭,冯玉涛,刘伟奇,魏忠伦,康玉思..大屏背投激光显示广角镜头的设计[J].光学精密工程,2011,19(5):945-950,6.基金项目
国家863高技术研究发展计划资助项目(No.2007AA03011) （No.2007AA03011）
