A5006037802- Advanced optical system design
- Optical Imaging and Spectroscopy Techniques
- Advanced Fluorescence Microscopy Techniques
- Digital Holography and Microscopy
- Image Processing Techniques and Applications
- Superconducting Materials and Applications
- Optical Coherence Tomography Applications
- Adaptive optics and wavefront sensing
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray Imaging Techniques
- Advanced Optical Imaging Technologies
- Optical measurement and interference techniques
- Advanced Optical Sensing Technologies
- Retinal Imaging and Analysis
- Optical Polarization and Ellipsometry
- Glaucoma and retinal disorders
- Photoacoustic and Ultrasonic Imaging
- Photonic and Optical Devices
- Retinal Diseases and Treatments
- Rare-earth and actinide compounds
- Advanced Electron Microscopy Techniques and Applications
- Magnetic Properties of Alloys
- Antenna Design and Optimization
- Non-Invasive Vital Sign Monitoring
University of Glasgow
2016-2025
Instituto de Ciencia de Materiales de Madrid
2024
University of Bayreuth
2023
National University Hospital of Iceland
2019
University of Iceland
2019
University of Aberdeen
2019
Swansea University
2018
Astronomy and Space
2018
Trinity College Dublin
2016
Birkbeck, University of London
2012-2013
Traditional imaging systems exhibit a well-known trade-off between the resolution and field of view their captured images. Typical cameras microscopes can either “zoom in” image at high-resolution, or they out” to see larger area lower resolution, but rarely achieve both effects simultaneously. In this review, we present details about relatively new procedure termed Fourier ptychography (FP), which addresses above produce gigapixel-scale images without requiring any moving parts. To...
Abstract The revolution in low-cost consumer photography and computation provides fertile opportunity for a disruptive reduction the cost of biomedical imaging. Conventional approaches to microscopy are fundamentally restricted, however, modest field view (FOV) and/or resolution. We report technique, implemented with Raspberry Pi single-board computer color camera combined Fourier ptychography (FP), computationally construct 25-megapixel images sub-micron New image-construction techniques...
Abstract Pixelation occurs in many imaging systems and limits the spatial resolution of acquired images. This effect is notably present quantum experiments with correlated photons which number pixels used to detect coincidences often limited by sensor technology or acquisition speed. Here, we introduce a pixel super-resolution technique based on measuring full spatially-resolved joint probability distribution (JPD) spatially-entangled photons. Without shifting optical elements using prior...
A snapshot multi-spectral imaging technique is described which employs multiple cascaded birefringent interferometers to simultaneously spectrally filter and demultiplex spectral images onto a single detector array. Spectral are recorded directly without the need for inversion rejection of light so offers potential high signal-to-noise ratio. An example an eight-band movie sequence presented; we believe this first such demonstration able record sequences computer reconstruction.
The magnetic properties of the neptunium monopnictides, NpN, NpP, NpAs, and NpSb, have been examined by a variety experimental techniques. All compounds NaCl structure. present paper reports results magnetization, M\"ossbauer, electrical-resistivity, neutron-diffraction, lattice-parameter (x-ray) measurements between 1.5 300 \ifmmode^\circ\else\textdegree\fi{}K on polycrystalline samples prepared in this laboratory. Particular emphasis is placed both complementary information obtained...
Traditional approaches to imaging require that an increase in depth of field is associated with a reduction numerical aperture, and hence resolution optical throughput.In their seminal work, Dowski Cathey reported how the asymmetric point-spread function generated by cubic-phase aberration encodes detected image such digital recovery can yield images extended without sacrificing [Appl.Opt.34, 1859Opt.34, (1995))].Unfortunately recovered are generally visibly degraded artifacts arising from...
The retina is derived from a pseudostratified germinal zone in which the relative position of progenitor cell believed to determine progeny aligned radial axis. Such developmental mechanism would ensure that arrays cells comprise functional units mature central nervous system are also clonally related. present study has tested this hypothesis by using X chromosome-inactivation transgenic mosaic mice. We report shows conspicuous distinction for related neuroblasts different laminar and fates:...
Fourier-transform imaging spectrometers offer important advantages over other spectral modalities, such as, a wider free range, higher resolutions and, in low-photon-flux conditions, signal-to-noise ratios can be achieved. Unfortunately, for application harsh environments, deployment of instruments based on traditional moving-mirror interferometers is problematic due to their inherent sensitivity vibration. We describe new spectrometer, scanning birefringent interferometer. This system...
Radially symmetric pupil plane phase retardation functions are derived that extend focal depth and alleviate third-order spherical aberration (SA) effects. The radial symmetry of these means they can be more conveniently manufactured by use traditional techniques such as diamond machining than previously reported filters with rectangular symmetry. method employs minimization the variation Strehl ratio defocus, W20, SA, W40. performance is illustrated comparison standard optical systems filters.
Substance P, a physiologically potent neuropeptide, is considered to participate in nociceptive transmission of nerve impulses. P immunofluorescent nerves are demonstrated the inferior joint recess capsule and its synovial folds human lumbosacral zygapophyseal joints. This may have clinical significance spinal pain.
We describe the use of wavefront coding for mitigation optical aberrations in a thermal imaging system. Diffraction-limited is demonstrated with simple singlet which enables an approximate halving length and mass system compared to equivalent two-element lens.
The angular resolution of many commercial imaging systems is limited, not by diffraction or optical aberrations, but pixilation effects. Multiaperture has previously demonstrated the potential for super-resolution (SR) using a lenslet array and single detector array. We describe practical demonstration SR an 25 independent commercial-off-the-shelf cameras. This technique demonstrates increasing toward limit, without limit on imposed use
The spatial resolution of conventional optical microscopy is limited by diffraction to transverse and axial resolutions about 250 nm, but localization point sources, such as single molecules or fluorescent beads, can be achieved with a precision 10 nm better in each direction. Traditional approaches two dimensions enable high only for thin in-focus layer that typically much less than the depth cell. This precludes, example, super-resolution extended three-dimensional biological structures...
Abstract Accelerating stomatal kinetics through synthetic optogenetics and mutations that enhance guard cell K+ flux has proven a viable strategy to improve water use efficiency biomass production. Stomata of the model C4 species Gynandropsis gynandra, relative C3 plant Arabidopsis thaliana, are similarly fast open close. We identified cloned rectifying outward channel (GROK) showed GROK is preferentially expressed in cells. homologous GORK and, oocytes, yields current consistent with...
We present the first analytical analysis of image artifacts in defocused hybrid imaging systems that employ a cubic phase-modulation function. show defocus have form replications and are caused by net phase modulation optical transfer Both numerical simulations experimental images presented exhibit replication compatible with expressions.