中国光学, 2014, 7 (3): 456, 网络出版: 2014-06-10
800万像素手机广角镜头设计
Design of wide-angle lens for 8 mega-pixel mobile phone camera
摘要
为了满足市场对高像素手机广角镜头的需求, 设计出一款800万像素大相对孔径的手机广角镜头。该手机镜头由4片塑料非球面透镜和1片红外滤光片组成, 镜头的光圈值F为245, 视场角为80°, 采用Omnivision公司的OV8850型号800万像素CMOS图像传感器, 最大分辨率为3 280 pixel×2 464 pixel, CMOS图像传感器的像素尺寸为11 μm, 奈奎斯特频率为454 lp/mm。设计结果显示, 镜头在1/2奈奎斯特频率处, 07视场内的MTF值均大于048, 全视场的MTF值大于038; 在奈奎斯特频率处, 07视场内的MTF值大于015; 最大畸变小于2%, 因此可获得优良的成像质量。
Abstract
In order to meet the requirement of mobile phone market on the wide-angle and high-pixel mobile phone lens, a wide-angle and 8 mega-pixel mobile phone lens is designed. The mobile phone lens are composed of 4 plastic aspheric lens and an IR filter, and the F-number is 245 and FOV is 80. The sensor OV8850 made by Omnivision with 8 mega pixels, maximum resolution of 3 280 pixel×2 464 pixel, pixel size of 11 μm, and Nyquist sampling frequency of 454 lp/mm. The design result shows that the MTF value is larger than 048 at 1/2 Nyquist sampling frequency in the 07 fields of view(FOV), and the MTF of FOV is larger than 038. The MTF value in 07 FOV is larger than 015 at Nyquist sampling frequency and the distortion is less than 2%.
李航, 颜昌翔. 800万像素手机广角镜头设计[J]. 中国光学, 2014, 7(3): 456. LI Hang, YAN Chang-xiang. Design of wide-angle lens for 8 mega-pixel mobile phone camera[J]. Chinese Optics, 2014, 7(3): 456.