Abstract
The compact, slim and high pixel mobile phone camera is highly demanded with the development of mobile phone, especially the thinner and thinner request of people. To satisfy this need, a mobile phone lens system composed of 1 glass spherical lens and 3 plastic aspheric lenses was designed with Code V. The F-number was 2.85 and FOV was 61°, the effective focal length and back focal length are 5 and 0.468 mm, respectively. A 1/3.2 inch 8 mega-pixel CMOS made by APTINA was taken as the image sensor of the lens assembly, whose pixel size is 1.4 μm and the limiting resolution was 357 lp/mm. The design results shown that the M TF value was more than 0.2 within most fields of view at the Nyquist frequency and more than 0.5 at the 1/2 Nyquist frequency, the maximum distortion was 0.66%. It shows that the lens has good performance and meets practical requirements.
Highlights
With the development of the society, Mobile phone has become an absolutely necessarily tool of communication
To evaluate the imaging quality of the lens system, relative illumination, field curvature, distortion, Modulation Transfer Function (MTF), spot diagram and aberration were shown based on the results of optimization
If the relative illumination is too low, the rays of 1.0 FOV will be little, so the image will appear dark angle, which will greatly damage the imaging quality. It is accepted when the relative illumination of mobile phone camera lens is more than 50%
Summary
With the development of the society, Mobile phone has become an absolutely necessarily tool of communication. Mobile phone with camera has become the first choice to remember the wonderful episodes around us. Since the coming out of Mobile phone with a 0.11 million pixels digital camera in 2000 (Liu et al, 2008), camera based mobile phones see over 96% penetration of those in the 18-30 age bracket and the pixels continuous increase. You even can find the mobile phone with 10 million pixels camera in the market now. We designed a mega pixels mobile phone lens with code V based on a selected initial structure
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