全景环带成像系统的杂散光分析及抑制  

Stray Light Analysis and Suppression of Panoramic Annular Lens

作　　者：鲁天雄[1] 白剑[1] 黄治[1] 汪凯巍[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,浙江杭州310027

出　　处：《光学学报》2013年第5期96-104,共9页Acta Optica Sinica

基　　金：国家自然科学基金(60877008)资助课题

摘　　要：全景环带透镜(PAL)在有强光的实际运用中经常会出现像杂散光较强和信噪比降低的情况,对产生的杂散光的分析及抑制非常重要。分析了PAL光学系统中杂散光的主要来源,并提出了一种针对透射面反射产生的杂散光的抑制方法。利用ASAP软件进行仿真,分析了基于该方法设计的PAL光学系统的杂散光情况,结果表明,对比普通的同光学参数的PAL系统,在50°～85°半视场时由透射面反射引起的杂散光减少了约85%,其他视场时杂散光未增多。设计了杂散光对比实验,实验结果验证了仿真结果,表明提出的杂散光抑制方法可以有效抑制PAL光学系统中的杂散光。When there is a highlight source in the field of a panoramic annular lens （PAL）, the image will be covered by stray light like mist, so it is important to suppress stray light in a PAL system. The main sources of stray light in PAL are analyzed. As to the stray light caused by incomplete transmission of refractive surfaces, a suppression method is proposed, based on which a new PAL system is designed. In order to verify the feasibility of this method, a comparison of stray light performance is conducted between an ordinary PAL system and the new PAL system. The result indicates that in half field angle of 50°-85°, the stray light caused by incomplete transmission of refractive surfaces is reduced by 85 % in the new PAL system, while the stray light doesn＇t increase in other fields of view.

关 键 词：成像系统 杂散光分析及抑制 光线追迹 全景环带透镜 

分 类 号：TN202[电子电信—物理电子学]