Article
Multidisciplinary Sciences
Adam Kubec, Marie-Christine Zdora, Umut T. Sanli, Ana Diaz, Joan Vila-Comamala, Christian David
Summary: The authors have successfully realized an achromatic X-ray lens by combining a diffractive Fresnel zone plate and a refractive lens. This lens overcomes the chromatic aberration limitation of conventional X-ray optics and enables high-resolution imaging with broadband X-ray tube sources.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Binming Liang, Jing An, Xin Su
Summary: This paper analyzes the electrically controlled zoom characteristics of liquid crystal lens and the basic theory of Fresnel lens achromatic, and proposes a diffractive-refractive hybrid lens model made of polymer-dispersed liquid crystal (PDLC) material. Fresnel liquid crystal lenses and PDLC hybrid lenses are tested with light at R, G, and B wavelengths, respectively. The simulation results show that the hybrid lens provides a greater range of adjustment of the focus position. After voltage modulation, the measured light with three different wavelengths have the same focal length, which means that the axial chromatic aberration is eliminated. In addition, with the elimination of axial chromatic aberration, the zoom range of the hybrid lens is doubled by further accurately controlling the electrode, which breaks through the limitation that the traditional liquid crystal lens can only work in monochromatic light spectrum.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Optics
Bumin K. Yildirim, Hamza Kurt, Mirbek Turduev
Summary: The study introduces a high-numerical aperture, diffraction-limited achromatic multilevel diffractive lens designed and optimized using a multi-objective differential evolution algorithm, with experimental validation through 3D printing technology.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Analytical
Yuan Hu, Jiaqi Huo, Binpeng Cheng
Summary: Traditional broadband UV optical designs have structural problems that cannot meet the requirements of light and miniaturization. This study introduces a novel design of double-layer diffractive optical elements (DOEs) for a wide UV wavelength range. The refractive/diffractive hybrid lens system designed with seven lenses produces a higher image quality than the refractive lens system, providing an effective solution to the low transmission rate of traditional UV refractive lens systems.
Article
Chemistry, Analytical
Viktoria V. Evdokimova, Vladimir V. Podlipnov, Nikolay A. Ivliev, Maxim V. Petrov, Sofia V. Ganchevskaya, Vladimir A. Fursov, Yuri Yu. Yuzifovich, Sergey O. Stepanenko, Nikolay L. Kazanskiy, Artem V. Nikonorov, Roman V. Skidanov
Summary: In this paper, a hybrid refractive-diffractive lens is presented, which, when combined with a deep neural network-based image reconstruction method, can produce high-quality real-world images with minimal artifacts. The lens compensates for off-axis aberrations of a single refractive element and reduces chromatic aberrations across the visible light spectrum. The authors also introduce a novel quality criteria called false edge level (FEL) to validate the visually appealing artifact-free images produced by the neural network under various ISO and exposure settings. The inclusion of real scene images without corresponding ground truth in the training process is made possible by the proposed quality criteria (FEL).
Article
Engineering, Electrical & Electronic
Jin Chen, Hongchen Chu, Yao Zhang, Yun Lai, Mingji Chen, Daining Fang
Summary: A new gradient refractive index (GRIN) lens design based on a modified refractive index (RI) profile of classical Luneburg lens was proposed, achieving highly efficient achromatic subdiffraction focusing and directive far-field radiation. The experimental results of the 3-D printed sample were consistent with theoretical predictions and numerical simulations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Optics
Jun Amako, Hidetoshi Nakano
Summary: An achromatic cascade optical system was developed for multifocusing ultrashort pulse beams using a diffractive beam splitter, effectively managing system dispersions and improving focusing resolutions by removing pulse front distortions and chromatic aberrations. The proposed pulse delivery technique enhances materials processing practicality with ultrashort pulses.
Review
Optics
Jacob Engelberg, Uriel Levy
Summary: This paper reviews the performance limits of flat lenses, including achromatic diffractive lenses and metalenses. It shows that these lenses can support a wide spectral range but have limitations in focusing power and broadband response.
Article
Optics
Zhenyi Luo, Yannanqi Li, John Semmen, Yi Rao, Shin-Tson Wu
Summary: This study demonstrates an achromatic diffractive liquid-crystal device to overcome the chromatic aberration issue. The proposed device consists of three stacked diffractive liquid crystal optical elements with specific spectral response and polarization selectivity. Simulation and experimental results show significant improvement in imaging performance. This technology has potential applications in virtual reality and mixed reality fields.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Medicine, General & Internal
Majid Moshirfar, Seth R. Stapley, Wyatt M. Corbin, Nour Bundogji, Matthew Conley, Ines M. Darquea, Yasmyne C. Ronquillo, Phillip C. Hoopes
Summary: This study compares the visual and refractive performance of two multifocal intraocular lenses, TECNIS Synergy and AcrySof IQ PanOptix. The results show that there are differences in visual acuity and photic phenomena between the two lenses.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Optics
Oriel Mendoza-yero
Summary: A surface-pixeled convergent lens with arbitrary modulation of amplitude and phase along the depth of focus is introduced using the scalar theory of diffraction. This complex diffractive lens is computer-generated from an exact solution of the inverse focal shaping problem obtained by utilizing the Fresnel diffraction integral. The technique of spatial multiplexing is used to encode the complex diffractive lens into a phase optical element that can be dynamically implemented using a commercial liquid-crystal spatial light modulator. The optical surface of this lens, which can generate both a single axial focus and multiple parallel foci, exhibits neither linear nor rotational symmetry but rather phase jumps between pixels.
Article
Optics
Michael Schmid, Florian Sterl, Simon Thiele, Alois Herkommer, Harald Giessen
Summary: This letter demonstrates the use of 3D direct laser writing technology in creating micro-optical devices with drastically reduced chromatic aberrations by combining different photoresists. The combination of refractive and diffractive surfaces to create achromats and apochromats has been successfully shown, offering significant benefits for micro-optics.
Article
Optics
Haiquan Hu, Hao Xu, Yueting Chen, Zhihai Xu, Qi Li, Huajun Feng, Tingting Jiang
Summary: A fast method for designing broadband achromatic diffractive optical elements is proposed in this study, which involves improvements in algorithm and an increase in sampling rate to accelerate the optimization process.
Article
Optics
Samuel Pinilla, Seyyed Reza Miri Rostami, Igor Shevkunov, Vladimir Katkovnik, Karen Egiazarian
Summary: The end-to-end optimization of diffractive optical elements (DOEs) through a digital differentiable model combined with computational imaging has been gaining attention in emerging applications due to its compact physical setups. However, the performance of this methodology is still limited by manufacturing artefacts, mismatch between simulated and experimental point spread functions, and calibration errors.
Article
Physics, Multidisciplinary
Gu Ma, Peng-Lei Zheng, Zheng-Wen Hu, Suo-Dong Ma, Feng Xu, Dong-Lin Pu, Qin-Hua Wang
Summary: This paper proposes a phase-coded diffractive lens (PCDL) for achromatic and wide field-of-view imaging with a large aperture and high efficiency. By coding the phase distribution of a conventional diffractive lens with a cubic function, the working bandwidth and field-of-view of the lens are expanded. Experimental results confirm the performance of the proposed phase-coded diffractive lens.
