Multifocal multi-value phase zone plate for 3D focusing

Ghebjagh, Shima Gharbi; Fischer, David G.; Sinzinger, Stefan

doi:10.1364/ao.58.008943

Cited by 22 publications

(5 citation statements)

References 27 publications

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“…The result is a multi-focal diffractive lens (MFL) which plays the dual role of a multifocal diffractive lens, as a multi-plane defocuser, and a beam splitting linear grating based on a detour phase approach. The optimized nonlinear phase values in each period affect the energy distribution in the diffraction orders [8,9] leading to an efficient equal-intensity array of focus spots. Additionally, a refractive cylindrical lens is required to obtain the desired light-sheet distribution.…”

Section: Design Fabrication and Measurement Resultsmentioning

confidence: 99%

“…f and d are the focal distance of the MFL and the period of the linear grating. The coefficients c s depend on the optimized phase values assigned to each area of the MFL to assure a uniform energy distribution for the generated diffraction orders [8,9]. The transmission function includes an order-dependent focusing power and a linear phase.…”

Section: Design Fabrication and Measurement Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Linearly modulated multi-focal diffractive lens for multi-sheet excitation of flow-driven samples in a light-sheet fluorescence microscope

Hofmann

Ghebjagh²,

Chen³

et al. 2022

EPJ Web Conf.

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Light-sheet fluorescence microscopy (LSFM) with single light-sheet illumination enables rapid 3Dimaging of living cells. In this paper we show the design, fabrication and characterization of a diffractive optical element producing several light sheets along an inclined tube for applications in flow-driven imaging. The element, which is based on a multi-focal Fresnel zone plate and a linear grating, generates in combination with a refractive cylindrical lens five thin light sheets of equal intensity.

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Section: Design Fabrication and Measurement Resultsmentioning

confidence: 99%

Section: Design Fabrication and Measurement Resultsmentioning

confidence: 99%

Linearly modulated multi-focal diffractive lens for multi-sheet excitation of flow-driven samples in a light-sheet fluorescence microscope

Hofmann

Ghebjagh²,

Chen³

et al. 2022

EPJ Web Conf.

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show abstract

“…The binary phase design simplifies the fabrication process, but also limits its theoretical diffraction efficiency. To increase the diffraction efficiency, multi-value phase grating (MVPG) [20][21][22] is proposed, which has more phase values within one period of the grating.…”

Section: Introductionmentioning

confidence: 99%

Multi-value phase grating fabrication using direct laser writing for generating a two-dimensional focal spot array

Huang¹,

Li²,

Tu³

et al. 2022

J. Opt.

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As a beam splitter, multi-value phase grating has a higher diffraction efficiency than the traditional Damman grating due to its increased number of phase values within one period of the grating. In this paper, two multi-value phase gratings are numerically designed within a 120 μm * 120 μm area, which generate 4 * 4 and 5 * 5 focal spot arrays in the far field. Both gratings are fabricated by direct laser writing technology. Their diffraction efficiencies reach 68.58% and 63.4%, respectively. To compare, Damman gratings with the same size and focal spot arrays are designed and fabricated, whose diffraction efficiencies are tested to be 29.55% and 35.04%, respectively. The results demonstrate the better optical properties of multi-value phase gratings and the capability of direct laser writing in three-dimensional nano-scale diffractive optical element fabrication.

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“…Generation of beam spot array with high uniformity has been extensively investigated due to its wide range of applications including optical data storage [1][2][3][4], laser processing [5,6], optical switching [7,8], and high-resolution optical imaging [9]. The optical spot array can be generated through optical refraction or diffraction.…”

Section: Introductionmentioning

confidence: 99%

Parametric Generation of Variable Spot Arrays Based on Multi-Level Phase Modulation

Zhang

Yang

et al. 2022

Photonics

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Holographic generation of beam spot array with high uniformity have been extensively investigated while existing methods cannot combine high quality and tunability. This paper demonstrated a method to generate beam spot array by using phase-only liquid crystal on silicon (LCOS) device. The proposed method is highly flexible and tolerant to the defects within the LCOS device. The uniformity deviation of the speckle array can be limited to within ±5% in the numerical simulation and the experimental results agreed well with the simulation results.

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Multifocal multi-value phase zone plate for 3D focusing

Cited by 22 publications

References 27 publications

Linearly modulated multi-focal diffractive lens for multi-sheet excitation of flow-driven samples in a light-sheet fluorescence microscope

Linearly modulated multi-focal diffractive lens for multi-sheet excitation of flow-driven samples in a light-sheet fluorescence microscope

Multi-value phase grating fabrication using direct laser writing for generating a two-dimensional focal spot array

Parametric Generation of Variable Spot Arrays Based on Multi-Level Phase Modulation

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