基于眼模型的折/衍混合眼底相机设计  

Hybrid Refractive/Diffractive Optical System Design of a Digital Retina Camera

作　　者：许妍[1] 王肇圻[1] 田野[1] 

机构地区：[1]南开大学现代光学研究所光电信息技术科学教育部重点实验室,天津300071

出　　处：《光子学报》2009年第5期1122-1125,共4页Acta Photonica Sinica

基　　金：国家自然科学基金重点项目(60438030);国家自然科学基金(60577015)资助

摘　　要：应用二元衍射光学理论,设计了一个基于Gullstrand-Le Grand眼光学模型的折/衍混合免散瞳手持式数字眼底相机.该相机的视场角28°,摄影系统由五片透镜构成,其中包含一个二元面.在综合考虑人眼本身和外部系统的像差后,实现了全视场200万像素的高清晰成像,具有较大调焦能力,对-10D至7D屈光度人眼普遍适用.结果显示,该系统成像分辨率高于120lp/mm,场曲值小于0.75mm,畸变仅为7.0%,色差小于3.5μm.衍射光学元件的引入,有效地简化了系统,减小了重量和体积.Using diffractive optics theory, a portable Hybrid Refractive/Diffractive digital retina camera without mydriatic was designed based on Gullstrand-Le Grand eye model. The camera consists of 5 lenses, including one binary surface,and realizes the highly clear image with 2 mega pixels in all the 28 fields of view after the comprehensive consideration of both the human eye and the camera. This camera has strong abilities for accommodation,which could adapt the different eyes from -10D to 7D. The result shows that the resolution of this system is 120 lp/mm,the field curve value is less than 0.75 mm,the distortion value is 7.0% and the chromatic value is less than 3. 5 μm. And, after the application of the binary diffractive element, the structure is simplified effectively and the volume and weight has decreased.

关 键 词：光学设计 眼底相机 折/衍混合 眼模型 

分 类 号：TH74[机械工程—光学工程]