Large numerical aperture and high resolution mobile phone lens
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摘要: 为了满足市场对手机镜头大相对孔径高分辨率的需求，采用E48R和LEXANH两种非球面塑料透镜，应用光学设计软件Code-v设计了一款大相对孔径高分辨率手机镜头。该手机镜头由5片非球面塑料透镜、1片红外滤波片、1片保护玻璃组成，其中第1片和第4片透镜为正透镜，第2片、第3片和第5片透镜为负透镜。结果表明，空间频率350lp/mm处，所有视场的调制传递函数(MTF)均优于0.2，0.7视场内的MTF均优于0.34，全视场内的场曲小于0.02mm，畸变小于2.55%。该研究为类似系统的设计提供了一定的参考价值。Abstract: The large numerical aperture and high resolution mobile phone lens using the plastic asphere lenses E48R and LEXANH is demanded with the development of mobile phone market. A kind of large numerical aperture and high resolution mobile phone lens was designed by using Code-v optical design software. The mobile phone lens is constituted by five plastic asphere lenses, an infrared cut filter, and a sensor cover glass. The first and fourth lenses are positive lenses. The second, third, and fifth lenses are negative lenses. Design results show that when the space frequency is 350lp/mm, the modulation transfer function (MTF) of all field of view are more than 0.2, and the MTF of 0.7 field of view are more than 0.34. The field curves are less than 0.02mm, and the distortion are less than 2.55%. It provides a reference value for similar systems.
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Keywords:
- optical design /
- mobile phone lens /
- asphere lenses /
- high resolution
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Table 1 Targets of design specifications for lens
focal length 3.85mm field of view 52° F# 2.2 back working distance 0.5mm maximum incident angle < 30° distortion < 3% total length < 5.2mm working waveband 486nm~656nm MTF 350lp/mm@0.15 
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