Camera design of 4P slim 8 megapixel lens

Cong Haifang

To achieve good performance with short length, an ultra-thin cell phone lens was designed with optical plastic as lens material by optimizing the initial structure. The lens included four pieces with even aspheric, and the aperture was placed in front. The length of the lens was 4.49mm, the F number was 2.4, the viewing angle was 65.5, and the focal length was 3.71 mm. The MTF at the Nyquist frequency and half-Nyquist frequency of the detector was respectively greater than 0.14 and 0.46 and distortion of the lens was less than 1.5%. The RMS radius of different fields was less than 3.5 m. The CMOS sensor IMX111 from SONY was adopted, and the maximum resolution was 3 2642 488. By simulation, the defocusing amount of the cell phone was 144 m. By focusing, high quality images can be obtained when the object distance was greater than 10 cm. Through the sensitivity analysis, the tolerance of the lens met the processing requirements. With short length and aspherical plastic lens, the production cost is low, the imaging performance is good, which meet the practical requirements of cell phone lens.

1. School of Electrical and Information Engineering,Changchun University of Science and Technology,Changchun 13002,China

Received Date: 2014-04-14

Rev Recd Date: 2014-05-17

Publish Date: 2014-12-25

Key words:

Abstract: To achieve good performance with short length, an ultra-thin cell phone lens was designed with optical plastic as lens material by optimizing the initial structure. The lens included four pieces with even aspheric, and the aperture was placed in front. The length of the lens was 4.49mm, the F number was 2.4, the viewing angle was 65.5, and the focal length was 3.71 mm. The MTF at the Nyquist frequency and half-Nyquist frequency of the detector was respectively greater than 0.14 and 0.46 and distortion of the lens was less than 1.5%. The RMS radius of different fields was less than 3.5 m. The CMOS sensor IMX111 from SONY was adopted, and the maximum resolution was 3 2642 488. By simulation, the defocusing amount of the cell phone was 144 m. By focusing, high quality images can be obtained when the object distance was greater than 10 cm. Through the sensitivity analysis, the tolerance of the lens met the processing requirements. With short length and aspherical plastic lens, the production cost is low, the imaging performance is good, which meet the practical requirements of cell phone lens.

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Reference (15)

[1]
[2]	Zhang Ruirui, Shen Weimin. Ultrathin lenses using annular folded optics [J]. Infrared and Laser Engineering, 2012, 41 (5): 1306-1310. (in Chinese) 张蕊蕊,沈为民. 环形孔径折叠型超薄镜头[J]. 红外与激光工程, 2012, 41(5): 1306-1310.
[3]	Zhang Ping, Wang Cheng, Song Dongfan, et al. Design of lens for 5 mega-pixel mobile phone cameras[J]. Journal of Applied Optics, 2009, 30(6): 934-938. (in Chinese) 张萍, 王诚, 宋东璠, 等. 500 万像素手机镜头设计[J]. 应用光学, 2009, 30(6): 934-938.
[4]
[5]	Yang Zhou, Yang Huiming, Ding Guilin. An ultra-thin eight-mega-pixel mobile phone lens[J]. Journal of Applied Optics, 2013, 34(5): 413-419. (in Chinese) 杨周, 阳慧明, 丁桂林. 一款超薄800 万像素手机镜头的设计[J]. 应用光学, 2013, 34(3): 413-419.
[6]
[7]
[8]	Wang Zhijiang, Gu Peisen. Practical Handbook of Optical Technique [M]. Beijing: China Machine Press, 2007: 631-638. (in Chinese) 王之江, 顾培森. 实用光学技术手册[M]. 北京: 机械工业出版社, 2007: 631-638.
[9]
[10]	Shen Mande, Li Cheng, Ren Huanhuan, et al. Design of lightweight and compact plastic lens with hybrid refractive/diffractive and freeform surfaces for night vision objective lens[J]. Infrared and Laser Engineering, 2014, 43(1): 160-165. (in Chinese) 沈满德, 李程, 任欢欢, 等. 轻小型折射_ 衍射混合自由曲面塑料微光夜视仪物镜设计[J]. 红外与激光工程, 2014, 43(1): 160-165.
[11]
[12]	Tang S C, Chen C S. Optical System for Taking Image: US, 7274518B1[P]. 2007-09-25.
[13]
[14]	Hsin Yueh Sung, Sidney S, Horng Chang. Design of mobile phone lens with extended depth of field based on poing-spread function focus invariance[C]//SPIE, 2008, 7061: 706107-1-11.
[15]	Chen Yuqun, Fan Dian, Hu Jun, et al. Auto-focus technology in the detection of infrared lens [J]. Infrared and Laser Engineering, 2013, 42(8): 2011-2016. (in Chinese) 陈玉群, 范典, 胡俊, 等. 红外透镜检测中的自动聚焦技术[J]. 红外与激光工程, 2013, 42(8): 2011-2016.

Camera design of 4P slim 8 megapixel lens

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