Miniaturized lens design based on free-form surface for micro intelligent instrument

Jiangyu Tian; Jun Chang; Jiajing Cao; Haibo Yang

doi:10.1117/12.2617868

15 February 2022 Miniaturized lens design based on free-form surface for micro intelligent instrument

Jiangyu Tian, Jun Chang, Jiajing Cao, Haibo Yang

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121666L (2022) https://doi.org/10.1117/12.2617868
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

With the development of miniaturization of smart devices, smart device imaging systems require lenses wit h extremely small size, optimal imaging quality and developability. The difficulty in the design of a small lens is how to design a lens with a longer focal length within the limit of the shorter total system length. The design should fit the optimal spatial resolution of the object while ensuring the maximum field of view, and on this basis, avoid large vision distortion caused by the field and other off-axis images. In this paper, a small lens for smart devices with a field of view of 68° and a total length of less than 5mm based on actual engineering is designed and the influence of lens length and lens focal length is analyzed. According to the needs of use, a design method combining spherical, aspheric and free -form surfaces is adopted. The spherical surface is made of glass, and the aspheric and free-form surfaces are molded by plastics, realizing a small lens design with processing feasibility and low cost. The lens will be combined with a focusing module and correction algorithm to be applied to micro intelligent instrument.

Citation Download Citation

Jiangyu Tian, Jun Chang, Jiajing Cao, and Haibo Yang "Miniaturized lens design based on free-form surface for micro intelligent instrument", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121666L (15 February 2022); https://doi.org/10.1117/12.2617868

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KEYWORDS

Lens design

Aspheric lenses

Tolerancing

Distortion

Imaging systems

Sensors

CMOS sensors

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