摘要
设计一种300万像素的手机镜头。该镜头由3片塑料非球面透镜和1个红外滤光片组成,采用三星公司的一款300万像素0.635 cm(1/4 inch)CMOS作为该镜头的图像传感器,像素颗粒大小为1.75μm,其分辨率极限为285 lp/mm,即为奈奎斯特频率。镜头的光圈值F为2.85,视场2ω为62°。该镜头有较好的成像质量,在奈奎斯特频率1/2处绝大部分视场的MTF值大于0.5,波前均方差(RMS wavefront error)小于0.14λ(λ为波长),最大畸变为-0.2%。
A mobile phone lens assembly composed of 3 plastic aspheric lenses and an IR filter was designed. This lens assembly has an excellent imaging performance. Considering production and cost, the plastic lens 480R was chosen. The 1/4 inch 3 mega-pixel CMOS made by Samsung was taken as the image sensor of the lens assembly, whose pixel size was 1. 75 μm, limiting resolution was 285lp/mm, F-number was 2.85 and FOV was 62°. Its MTF in the most part of FOV at half of Nyquist frequency is higher than 0.5, RMS wavefront error is less than 0. 14λ and maximum distortion is -0. 2 %.
出处
《应用光学》
CAS
CSCD
2008年第6期944-948,共5页
Journal of Applied Optics
