Glued diffraction optical elements with broadband and a large field of view

Yang, Hongfang; Xue, Changxi; Xiao, Jing; Chen, Jun

doi:10.1364/ao.403581

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…Several papers have been published recently that focused on the DE of diffractive microstructures [5][6][7][8]12,13,27]. However, papers focusing on both the spectral and angular dependence of the DOE within the framework of rigorous diffraction theory are virtually absent, except for our own previous publications [15][16][17]21].…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, a single DOE with low optical power, when introduced into a refractive lens objective design, enables a high degree of chromatism correction, which is necessary to obtain high-quality color images [1][2][3][4][5]. This is achieved even with a limited set of optical materials that allow refractive surfaces to be produced by precision stamping [6][7][8]. However, the dependence of the diffraction efficiency (DE) of DOEs on the wavelength and incidence angle of radiation has seriously hindered their widespread practical use in such systems, specifically, the lenses of photography and video cameras in mobile devices and mass video surveillance devices, which are produced using precision stamping of optical plastics.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we consider only two-layer sawtooth relief-phase microstructures, since at present only multilayer sawtooth microstructures make it possible to achieve the required Photonics 2021, 8, 327 2 of 7 level of homogeneity both in the required spectral and angular ranges. As a result, only such a microstructure allows the use of DO in optical imaging systems, and two layers is the minimum allowable number of layers [5,[8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Double-Layer Diffraction Microstructures Based on New Plastics and Molded Glasses

et al. 2021

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Within the framework of rigorous diffraction theory, the maximum possible incidence angles of radiation on two-layer sawtooth relief-phase microstructures in the visible (0.4 ≤ λ ≤ 0.7 μm) spectral range are compared. Optical materials for the layers of these microstructures are selected from a database of 47 plastics and 165 molded glasses. It is shown that when the ratio of the spatial period of the microstructure to the effective depth of the relief is greater than 20, the achievable angles within which the diffraction efficiency exceeds 0.95 lie in a wide range from 18.5° to 40.5° for single-relief structures and 7.5° to 22.3° for structures with two internal reliefs. The best results for purely plastic microstructures are obtained when the plastic CMT and the indium tin oxide nanocomposite in polymethylmethacrylate are used.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Double-Layer Diffraction Microstructures Based on New Plastics and Molded Glasses

et al. 2021

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“…Recently, extensive research into MLDOEs has focused on high broadband efficiencies for the selected diffraction order and also on high angular efficiency tolerances. In addition to the visible wavelength range, the mid-infrared has also been addressed [4][5][6]. Furthermore, mathematical models and optimization methods for material selection and grating depth have been introduced [7][8][9][10], and the scalar versus rigorously calculated diffraction efficiencies of the optimized MLDOEs have been compared [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Tailoring Wavelength-Selective Diffraction Efficiency Using Triple-Layer Double-Relief Blazed Gratings Incorporating Materials with Intersecting Dispersion Curves

Schmidt,

Hillmer,

Brunner

2023

Photonics

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Diffractive optical elements (DOEs) fundamentally provide the possibility to simultaneously utilize multiple orders for different imaging functions within a system. However, to take advantage of this property, it is necessary to tailor the assignment of specific wavelengths or wavelength ranges with high diffraction efficiency to specific diffraction orders. To achieve this wavelength-selective assignment to different orders, simple diffractive profile shapes are not suitable; instead, multilayer DOEs are required. In this study, we conducted theoretical, scalar investigations on the diffraction efficiency of triple-layer double-relief DOEs for the purpose of tailored wavelength selectivity. Specific materials such as nanocomposites, layer materials, and high-refractive-index liquids with strong dispersion were included, in addition to inorganic glasses, to enable wide design freedom for wavelength selectivity across multiple orders. To simultaneously account for both positive and negative orders, specific material combinations featuring intersecting or touching dispersion curves were utilized. For various material combinations, we calculated significantly different efficiency profiles for multiple orders by varying the relief depths. Further, we discuss the possibility of fine-tuning the efficiency profiles by using high-index liquids as an intermediate layer between two solid profiles, whose dispersion properties can be varied continuously or at least in small steps.

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Digital infrared chromatic aberration correction algorithm for a membrane diffractive lens based on coherent imaging

Wu¹,

Li²,

cui³

et al. 2022

Appl. Opt.

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Aiming at the wide-spectrum chromatic aberration problem of membrane diffractive lenses, the concept of the digital chromatic aberration correction infrared imaging system was proposed. The principle of digital chromatic aberration correction was given, and the chromatic aberration correction of this system was completed on a computer, which is based on a wavelength-tunable laser local oscillator coherent detection detector. Compared with the chromatic aberration correction method for traditional lenses, this membrane diffractive optical system exhibited characteristics of small size, low weight, and low complexity. The digital chromatic aberration correction application conditions of this membrane diffractive optical system were analyzed. In addition, the main parameters and imaging simulation results were given. The center wavelength of this membrane diffractive optical system is 1.55 µm, and its spectral range is 1.50–1.60 µm. The application of autocorrelation processing to infrared complex images after digital chromatic aberration correction followed by incoherent accumulation of the received corrected complex images based on multiple stepping wavelengths could significantly improve the imaging signal-to-noise ratio.

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Glued diffraction optical elements with broadband and a large field of view

Cited by 3 publications

References 31 publications

Highly Efficient Double-Layer Diffraction Microstructures Based on New Plastics and Molded Glasses

Highly Efficient Double-Layer Diffraction Microstructures Based on New Plastics and Molded Glasses

Tailoring Wavelength-Selective Diffraction Efficiency Using Triple-Layer Double-Relief Blazed Gratings Incorporating Materials with Intersecting Dispersion Curves

Digital infrared chromatic aberration correction algorithm for a membrane diffractive lens based on coherent imaging

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