Sensors, Vol. 25, Pages 3202: Broadband Achromatic Hybrid Metalens Module with 100° Field of View for Visible Imaging

Sensors doi: 10.3390/s25103202

Authors:
Peixuan Wu
Xingyi Li
Yuanyuan Xing
Jiaojiao Wang
Wujie Zheng
Zekun Wang
Yaoguang Ma

Conventional metalenses struggle with chromatic aberration and narrow field of view (FOV), making it challenging to meet the dispersion requirements for large apertures and compensate off-axis aberrations for wide FOV. Here, we demonstrate a hybrid metalens module consisting of five refractive plastic lenses and a polarization-insensitive metalens to achieve broadband achromatic imaging within 400–700 nm and a wide FOV up to 100°. The system exhibits negligible variation in focal length (~1.2%) across the visible range (460–656 nm) and consistently achieves modulation transfer function (MTF) values > 0.2 at 167 lp/mm across all wavelengths and incident angles. We also demonstrate integrated lens modules that capture high-quality images from distances ranging between 0.5 and 4 m without post-processing, showcasing its potential for compact, wide-angle optical systems.

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Peixuan Wu www.mdpi.com