Dr. Johannes Drozella Profile

Dr. Johannes Drozella

SPIE Involvement:

Author

Area of Expertise:

Optical Simulation , Propagation Algorithms , Process Simulation , Additive Manufacturing , Design and Modeling

Websites:

Company Website

Publications (11)

Proceedings Article | 18 June 2024 Presentation

A 3D-printed fiber core multiplexing endoscope

Andrea Toulouse, Florian Rothermel, Johannes Drozella, Simon Thiele, Alois Herkommer

Proceedings Volume PC12995, PC1299504 (2024) https://doi.org/10.1117/12.3016279

KEYWORDS: Endoscopes, Multiplexing, Biological imaging, Imaging systems, Engineering, Resolution enhancement technologies, Optical fabrication, Optical design, Multiphoton lithography, Microscopy

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SPIE Journal Paper | 1 April 2024 Open Access

Fast vector wave optical simulation methods for application on 3D-printed microoptics

Marco Wende, Johannes Drozella, Andrea Toulouse, Alois Herkommer

JOM, Vol. 4, Issue 02, 024501, (April 2024) https://doi.org/10.1117/12.10.1117/1.JOM.4.2.024501

KEYWORDS: Electric fields, Reflection, Light sources and illumination, Optical simulations, Micro optics, Refractive index, Manufacturing, Interfaces, Computer simulations, Single mode fibers

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Proceedings Article | 12 March 2024 Presentation + Paper

Fast vector wave optical simulation methods for application on 3D-printed micro optics

Marco Wende, Johannes Drozella, Andrea Toulouse, Alois Herkommer

Proceedings Volume 12876, 128760I (2024) https://doi.org/10.1117/12.3001164

KEYWORDS: Reflection, Electric fields, Light sources and illumination, Micro optics, Manufacturing, Single mode fibers, Optics manufacturing, Interfaces, Optical simulations, Polarization, 3D printing, Two photon polymerization, Computational electromagnetics, Optical design, Additive manufacturing

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Proceedings Article | 17 March 2023 Presentation

Towards additive manufacturing of multiplexed volume scattering devices using two-photon polymerization

Johannes Drozella, Andrea Toulouse, Alois Herkommer

Proceedings Volume PC12412, PC124120K (2023) https://doi.org/10.1117/12.2654541

KEYWORDS: Multiplexing, Scattering, Additive manufacturing, Multiple scattering, Two photon polymerization, Polymers, Optics manufacturing, Sensors, Optical fibers, Optical design

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Proceedings Article | 20 May 2022 Presentation

Complex 3D printed microoptical systems: from a pinhole camera to a spectrometer

Andrea Toulouse, Johannes Drozella, Simon Thiele, Harald Giessen, Alois Herkommer

Proceedings Volume PC12135, PC1213504 (2022) https://doi.org/10.1117/12.2624165

KEYWORDS: Spectroscopy, Complex systems, Imaging systems, Coded apertures, Microfluidics, Cameras, Stray light control, Stereoscopic cameras, Micro optics, Zoom lenses

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Femtosecond direct laser writing is a key enabling technology for complex microoptics. Imaging and illumination applications have impressively been demonstrated in the past. Here, we take 3D-printed microoptics one step further and assess the feasibility of complex microoptical systems: From a pinhole camera to a spectrometer. The first step in successful realization of complex microoptical systems are specialized measurement techniques that match both fabrication and simulation methods. Different setups are presented to reach stray light control, isolate topographic effects, and measure the efficiency of diffractive structures with small lateral extensions. All methods are easy to implement and can be key to targeted optimization of complex systems. In a second step, the spectrum of corresponding fabrication methods to fsDLW is extended by the microfluidic addition of a functional substance. We show that the incorporation of microfluidic channels into the 3D-printed mounting structures can be used to absorb a non-transparent fluid to create aperutres. Thus, a 3D-printed micro-pinhole camera can be demonstrated. Finally, all learnings and methods from these studies are combined to create complex microoptical systems. Multiple concepts of ultra-compact 3D-printed wide-angle cameras are examined. A special focus is laid on optical and mechanical design, measurement and optimization of highly tilted refractive and catadioptric freeform surfaces. An iterative correction mechanism is developed to improve shape fidelity to realize first implementations of 180°×360° field of view multi-aperture imaging. The highest complexity of a 3D-printed microoptical system is finally reached by the realization of an entire measurement system. The feasibility of a monolithic spectrometer in a volume of only 100 × 100 × 300 μm³ is theoretically and experimentally demonstrated. The results represent the first direct spectrometer in this miniature size range and unclose a new era of complex 3D-printed microoptical (measurement) systems, enabled by novel methods for charactarization, optimization and aperture fabrication.

Proceedings Article | 4 March 2022 Presentation + Paper

Micro-3D-printed multi-aperture freeform ultra-wide-angle systems: production, characterization, and correction

Johannes Drozella, Andrea Toulouse, Pascal Motzfeld, Nils Fahrbach, Valese Aslani, Simon Thiele, Alois Herkommer, Harald Giessen

Proceedings Volume 11989, 119890V (2022) https://doi.org/10.1117/12.2609844

KEYWORDS: Optics manufacturing, Objectives, Imaging systems, Freeform optics, Microscopes, Combined lens-mirror systems, 3D printing, Static characterization, Two photon polymerization, Micro optics

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Proceedings Article | 1 August 2021 Presentation

Structured light to miniaturize optical micromanipulation

Asa Asadollahbaik, Simon Thiele, Aashutosh Kumar, Ksenia Weber, Johannes Drozella, Florian Sterl, Michael Heymann, Alois Herkommer, Jochen Fick, Harald Giessen

Proceedings Volume 11798, 117981G (2021) https://doi.org/10.1117/12.2596522

KEYWORDS: Structured light, Optical micromanipulation, Optical fibers, Optical tweezers, Micro optics, In vivo imaging, Spectroscopy, Refractive index, Particles, Optical aberrations

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Proceedings Article | 20 August 2020 Presentation

Efficient mirco- and nanoparticle trapping by improved optical fiber tweezers using 3D printed diffractive optical elements

Asa Asadollahbaik, Simon Thiele, Ksenia Weber, Aashutosh Kumar, Johannes Drozella, Alois Herkommer, Harald Giessen, Jochen Fick

Proceedings Volume 11463, 114631E (2020) https://doi.org/10.1117/12.2567647

KEYWORDS: Optical fibers, Nanoparticles, Diffractive optical elements, Fresnel lenses, Polymers, Fabrication, Femtosecond phenomena, Lithography, Lens design, Particles

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Proceedings Article | 1 April 2020 Presentation

Improved optical fiber tweezers using 3D printed Fresnel lenses (Conference Presentation)

Asa Asadollahbaik, Simon Thiele, Ksenia Weber, Aashutosh Kumar, Johannes Drozella, Florian Sterl, Alois Herkommer, Harald Giessen, Jochen Fick

Proceedings Volume 11345, 1134506 (2020) https://doi.org/10.1117/12.2559875

KEYWORDS: Optical fibers, Fresnel lenses, Optical tweezers, Particles, Lens design, Physics, Biology, Chemistry, Laser development, Microscopes

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Proceedings Article | 9 September 2019 Paper

Fast and comfortable GPU-accelerated wave-optical simulation for imaging properties and design of highly aspheric 3D-printed freeform microlens systems

Johannes Drozella, Andrea Toulouse, Simon Thiele, Alois Herkommer

Proceedings Volume 11105, 1110506 (2019) https://doi.org/10.1117/12.2528843

KEYWORDS: Wave propagation, Imaging systems, Refractive index, Aspheric lenses, Microlens, Optical simulations, Optical design, Matrices, 3D printing, Zemax

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Proceedings Article | 24 May 2018 Paper

GPU-accelerated simulation of the superresolution capabilities of dielectric microspheres using the Differential Method

Johannes Drozella, Karsten Frenner, Wolfgang Osten

Proceedings Volume 10678, 106780N (2018) https://doi.org/10.1117/12.2306435

KEYWORDS: Wave propagation, Radio propagation, Visualization, Diffraction, Super resolution, 3D modeling, Systems modeling, Refractive index, Photonic nanostructures, Computer simulations, Numerical simulations

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Showing 5 of 11 publications

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