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Large aperture phase-coded diffractive lens for achromatic and 16° field-of-view imaging with high efficiency |
| Gu Ma(马顾)1,2, Peng-Lei Zheng(郑鹏磊)1,2, Zheng-Wen Hu(胡正文)1,2, Suo-Dong Ma(马锁冬)1,2,3, Feng Xu(许峰)1,2,†, Dong-Lin Pu(浦东林)1,2, and Qin-Hua Wang(王钦华)1,2,‡ |
1 School of Optoelectronic Science and Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;
2 Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China;
3 CAS Key Laboratory of Space Precision Measurement Technology, Xi'an 710119, China |
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Abstract Diffractive lenses (DLs) can realize high-resolution imaging with light weight and compact size. Conventional DLs suffer large chromatic and off-axis aberrations, which significantly limits their practical applications. Although many achromatic methods have been proposed, most of them are used for designing small aperture DLs, which have low diffraction efficiencies. In the designing of diffractive achromatic lenses, increasing the aperture and improving the diffraction efficiency have become two of the most important design issues. Here, a novel phase-coded diffractive lens (PCDL) for achromatic imaging with a large aperture and high efficiency is proposed and demonstrated experimentally, and it also possesses wide field-of-view (FOV) imaging at the same time. The phase distribution of the conventional phase-type diffractive lens (DL) is coded with a cubic function to expand both the working bandwidth and the FOV of conventional DL. The proposed phase-type DL is fabricated by using the laser direct writing of grey-scale patterns for a PCDL of a diameter of 10 mm, a focal length of 100 mm, and a cubic phase coding parameter of 30π. Experimental results show that the working bandwidth and the FOV of the PCDL respectively reach 50 nm and 16° with over 8% focusing efficiency, which are in significant contrast to the counterparts of conventional DL and in good agreement with the theoretical predictions. This work provides a novel way for implementing the achromatic, wide FOV, and high-efficiency imaging with large aperture DL.
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Received: 09 December 2021
Revised: 20 January 2022
Accepted manuscript online: 17 February 2022
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PACS:
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42.79.Bh
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(Lenses, prisms and mirrors)
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42.25.Fx
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(Diffraction and scattering)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61775154), the Natural Science Foundation of the Jiangsu Higher Education Institutions, China (Grant No. 18KJB140015), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China, and the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology, China (Grant No. SPMT2021001). |
Corresponding Authors:
Feng Xu, Qin-Hua Wang
E-mail: xf750617@suda.edu.cn;chinhua.wang@suda.edu.cn
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Cite this article:
Gu Ma(马顾), Peng-Lei Zheng(郑鹏磊), Zheng-Wen Hu(胡正文), Suo-Dong Ma(马锁冬), Feng Xu(许峰), Dong-Lin Pu(浦东林), and Qin-Hua Wang(王钦华) Large aperture phase-coded diffractive lens for achromatic and 16° field-of-view imaging with high efficiency 2022 Chin. Phys. B 31 074210
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