Variable optical elements for fast focus control

SY Kang, M Duocastella, CB Arnold - Nature Photonics, 2020 - nature.com
In this Review, we survey recent developments in the emerging field of high-speed variable-
z-focus optical elements, which are driving important innovations in advanced imaging and …

Three-dimensional nanofabrication via ultrafast laser patterning and kinetically regulated material assembly

F Han, S Gu, A Klimas, N Zhao, Y Zhao, SC Chen - Science, 2022 - science.org
A major challenge in nanotechnology is the fabrication of complex three-dimensional (3D)
structures with desired materials. We present a strategy for fabricating arbitrary 3D …

Three-dimensional confocal reflectance microscopy for surface metrology

CS Kim, H Yoo - Measurement Science and Technology, 2021 - iopscience.iop.org
Confocal microscopy uses a confocal aperture in front of a detector to eliminate out-of-focus
blur, providing optical sectioning, high spatial resolution, and high contrast. It enables …

Three dimensional two-photon brain imaging in freely moving mice using a miniature fiber coupled microscope with active axial-scanning

BN Ozbay, GL Futia, M Ma, VM Bright, JT Gopinath… - Scientific reports, 2018 - nature.com
We present a miniature head mounted two-photon fiber-coupled microscope (2P-FCM) for
neuronal imaging with active axial focusing enabled using a miniature electrowetting lens …

Strategies for volumetric imaging with a fluorescence microscope

J Mertz - Optica, 2019 - opg.optica.org
Three-dimensional fluorescence imaging has been a longstanding goal for microscopists,
made all the more challenging when aiming for a trifecta of resolution, speed, and field of …

Zoom microscope objective using electrowetting lenses

L Li, D Wang, C Liu, QH Wang - Optics express, 2016 - opg.optica.org
We report a zoom microscope objective which can achieve continuous zoom change and
correct the aberrations dynamically. The objective consists of three electrowetting liquid …

Speeded-up focus control of electrically tunable lens by sparse optimization

D Iwai, H Izawa, K Kashima, T Ueda, K Sato - Scientific reports, 2019 - nature.com
Electrically tunable lenses (ETL), also known as liquid lenses, can be focused at various
distances by changing the electric signal applied on the lens. ETLs require no mechanical …

Tunable lenses: dynamic characterization and fine-tuned control for high-speed applications

C Dorronsoro, X Barcala, E Gambra, V Akondi… - Optics express, 2019 - opg.optica.org
Tunable lenses are becoming ubiquitous, in applications including microscopy, optical
coherence tomography, computer vision, quality control, and presbyopic corrections. Many …

Fast volumetric imaging with line-scan confocal microscopy by electrically tunable lens at resonant frequency

KD Mac, MM Qureshi, M Na, S Chang, TJ Eom… - Optics …, 2022 - opg.optica.org
In microscopic imaging of biological tissues, particularly real-time visualization of neuronal
activities, rapid acquisition of volumetric images poses a prominent challenge. Typically, two …

Advances in two-photon scanning and scanless microscopy technologies for functional neural circuit imaging

SR Schultz, CS Copeland, AJ Foust… - Proceedings of the …, 2016 - ieeexplore.ieee.org
Recent years have seen substantial developments in technology for imaging neural circuits,
raising the prospect of large-scale imaging studies of neural populations involved in …