Multiphysics simulation of the aspherical deformation of piezo-glass membrane lenses including hysteresis, fabrication and nonlinear effects

Lemke, Florian; Frey, Yasmina; Bruno, Binal Poyyathuruthy; Philipp, Katrin; Koukourakis, Nektarios; Czarske, Jürgen; Wallrabe, Ulrike; Wapler, Matthias C.

doi:10.1088/1361-665x/ab0eb3

Cited by 11 publications

(7 citation statements)

References 35 publications

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“…• Available non-magnetic adaptive lenses [26][27][28] provide a free aperture of 12 mm and a usable aperture around 8 to 9 mm at a focal power around ±10m −1 . An earlier version [28] of the adaptive lens had to be oriented horizontally to avoid distortions due to gravity.…”

Section: Optical Designmentioning

confidence: 99%

MR-compatible optical microscope for in-situ dual-mode MR-optical microscopy

et al. 2021

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We present the development of a dual-mode imaging platform that combines optical microscopy with magnetic resonance microscopy. Our microscope is designed to operate inside a 9.4T small animal scanner with the option to use a 72mm bore animal RF coil or different integrated linear micro coils. With a design that minimizes the magnetic distortions near the sample, we achieved a field inhomogeneity of 19 ppb RMS. We further integrated a waveguide in the optical layout for the electromagnetic shielding of the camera, which minimizes the noise increase in the MR and optical images below practical relevance. The optical layout uses an adaptive lens for focusing, 2 × 2 modular combinations of objectives with 0.6mm to 2.3mm field of view and 4 configurable RGBW illumination channels and achieves a plano-apochromatic optical aberration correction with 0.6μm to 2.3μm resolution. We present the design, implementation and characterization of the prototype including the general optical and MR-compatible design strategies, a knife-edge optical characterization and different concurrent imaging demonstrations.

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Section: Optical Designmentioning

confidence: 99%

MR-compatible optical microscope for in-situ dual-mode MR-optical microscopy

et al. 2021

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“…To implement the material characteristics, we used the default materials from the COMSOL material database for polyurethane, glass and PZT-5H and added or changed the following parameters: We determined the Young's modulus of the polyurethane fluid chamber in a pull test at approximately 5% strain to Y PU = 2.22 MPa [6] and we took the Young's modulus of the Schott D263t glass Y glass = 72.9 GPa from the material data sheet [25]. In [23], we determined the Young's modulus of the Ekulit EPZ-35ST13 PZT which we used as a reference actuator material to Y piezo = 37 GPa and implemented it into the simulation by scaling the compliance matrix of the PZT-5H.…”

Section: Fem Simulation For Optimizationmentioning

confidence: 99%

“…Adaptive optical elements can significantly improve the performance and reduce the complexity of optical systems. For example, modern microscopes can use varifocal lenses, such as [1,2], to scan the focal point along the z-axis [3,4] and lenses with spherical correction [5,6] to minimize aberrations and to provide a diffraction-limited resolution [7]. For lateral scanning, however, these systems mostly use reflective components, such as piezo-actuated mirrors, MEMS mirrors or galvanometer scanners [8].…”

Section: Introductionmentioning

confidence: 99%

Piezo-actuated adaptive prisms for continuously adjustable bi-axial scanning

Lemke¹,

Weber²,

Philipp³

et al. 2020

Smart Mater. Struct.

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We present two piezo-actuated adaptive prisms with apertures of 8 mm based on a bi-axial continuously tiltable glass window on top of an optical fluid, enabling fast scanning applications in a compact, linear axial design. One prism with a device size of 58 by 51 mm is optimized for scan angles of ±6.4 • and response times of 2.5 ms. A second compact prism uses spiral-shaped actuators to achieve a reduced device diameter of 33 mm at slightly compromised maximum scan angles of ±4.0 • with response times of approximately 4 ms. We show the design and FEM-based optimization of the prisms, their fabrication and the characterization of the scan angles and of the dynamic behavior. Finally, we also demonstrate the linearity of the system and discuss a simple control model.

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“…[24][25][26] However, the scanning angle range of electrowetting-based prisms is too narrow to achieve a large field of view. Recently, we introduced a piezo-actuated adaptive prism with a large tuning range 27,28 as a suitable alternative to galvanometer mirror that enables an in-line transmissive configuration with large scanning angle range.…”

Section: Introductionmentioning

confidence: 99%

3D-scanning microscopy with adaptive lenses and prisms for zebrafish studies

Wang

Lemke

Wapler

et al. 2021

J. Optical Microsystems

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Point-scanning-based microscopy systems require combination of axial and lateral scanning to obtain three-dimensional (3D) data. Axial scanning was commonly achieved by mechanical displacement of the objective or the sample. To improve, various adaptive lens-based solutions have been reported to circumvent the need for mechanically moving parts. The lateral scanning is predominantly implemented using galvanometric mirrors. Although the performance of such devices is flawless, they require bulky, folded beam-paths that make their incorporation in compact hand-held devices challenging. Recently, we introduced an adaptive prism as a transmissive device that enables lateral scanning. We demonstrate the first all-adaptive 3D scanning in laser scanning microscopes employing a compact in-line transmission geometry without mechanically moving parts and beam folding, combining an adaptive lens and a novel adaptive prism. Characterization of the all-adaptive microscope performance shows a lateral tuning range of approximately X ¼ Y ¼ 130 μm and an axial tuning range of about Z ¼ 500 μm. We successfully demonstrate 3D raster scanning of the fluorescence of a thyroid of a zebrafish embryo.

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Multiphysics simulation of the aspherical deformation of piezo-glass membrane lenses including hysteresis, fabrication and nonlinear effects

Cited by 11 publications

References 35 publications

MR-compatible optical microscope for in-situ dual-mode MR-optical microscopy

MR-compatible optical microscope for in-situ dual-mode MR-optical microscopy

Piezo-actuated adaptive prisms for continuously adjustable bi-axial scanning

3D-scanning microscopy with adaptive lenses and prisms for zebrafish studies

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