Spherical aberration correction of adaptive lenses

Philipp, Katrin; Lemke, Florian; Wapler, Matthias C.; Wallrabe, Ulrike; Koukourakis, Nektarios; Czarske, Jürgen

doi:10.1117/12.2250891

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The main advantage of our design [18] is that we are able to control both, the defocus and the spherical aberrations simultaneously. In [19,20] we demonstrated experimentally that we can independently control the focal power and aspherical coefficient and also showed the achievable aspherical and focal tuning range for one of our lenses [19]. We used this ability in [21] to correct spherical aberrations in a confocal microscope at different focal depths inside a sample.…”

Section: Introductionmentioning

confidence: 85%

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

Lemke

Frey

Bruno

et al. 2019

Smart Mater. Struct.

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In this paper we present and verify the non-linear simulation of an aspherical adaptive lens based on a piezo-glass sandwich membrane with combined bending and buckling actuation. To predict the full non-linear piezoelectric behavior, we measured the non-linear charge coefficient, hysteresis and creep effects of the piezo material and inserted them into the FEM model using a virtual electric field. We further included and discussed the fabrication parameters -glue layers and thermal stress -and their variations. To verify our simulations, we fabricated and measured a set of lenses with different geometries, where we found good agreement and show that their qualitative behavior is also well described by a simple analytical model. We finally discuss the effects of the geometry on the electric response and find, e.g., an increased focal power range from ±4.5 to ±9 m −1 when changing the aperture from 14 to 10 mm.

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Section: Introductionmentioning

confidence: 85%

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

Lemke

Frey

Bruno

et al. 2019

Smart Mater. Struct.

Self Cite

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“…A derivation of Eq. ( 5) can be found in 39 . It should be noted, that the combined effect of the adaptive lens and the two achromatic lenses of the relay system is measured (compare Fig.…”

Section: Methodsmentioning

confidence: 97%

Diffraction-limited axial scanning in thick biological tissue with an aberration-correcting adaptive lens

Philipp

Lemke

Scholz

et al. 2019

Sci Rep

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Diffraction-limited deep focusing into biological tissue is challenging due to aberrations that lead to a broadening of the focal spot. The diffraction limit can be restored by employing aberration correction for example with a deformable mirror. However, this results in a bulky setup due to the required beam folding. We propose a bi-actuator adaptive lens that simultaneously enables axial scanning and the correction of specimen-induced spherical aberrations with a compact setup. Using the bi-actuator lens in a confocal microscope, we show diffraction-limited axial scanning up to 340 μm deep inside a phantom specimen. The application of this technique to in vivo measurements of zebrafish embryos with reporter-gene-driven fluorescence in a thyroid gland reveals substructures of the thyroid follicles, indicating that the bi-actuator adaptive lens is a meaningful supplement to the existing adaptive optics toolset.

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Spherical aberration correction of adaptive lenses

Cited by 2 publications

References 7 publications

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

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

Diffraction-limited axial scanning in thick biological tissue with an aberration-correcting adaptive lens

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