PubMed Journals Articles About "Telescope Featuring Optics From Rigaku Innovative Technologies Europe" RSS

08:38 EDT 19th March 2018 | BioPortfolio

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Showing "Telescope Featuring Optics from Rigaku Innovative Technologies Europe" PubMed Articles 1–25 of 5,500+

Fast, wide-field and distortion-free telescope with curved detectors for surveys at ultralow surface brightness.

We present the design of an all-reflective, bifolded Schmidt telescope aimed at surveys of extended astronomical objects with extremely low surface brightness. The design leads to a high image quality without any diffracting spider, a large aperture and field of view (FoV), and a small central obstruction that barely alters the point spread function (PSF). As an example, we design a high-quality, 36 cm diameter, fast (f/2.5) telescope working in the visible with a large FoV (1.6°×2.6°). The telescope ca...

Ray tracing method for the evaluation of grazing incidence x-ray telescopes described by spatially sampled surfaces.

The nested grazing incidence telescope can achieve a large collecting area in x-ray astronomy, with a large number of closely packed, thin conical mirrors. Exploiting the surface metrological data, the ray tracing method used to reconstruct the shell surface topography and evaluate the imaging performance is a powerful tool to assist iterative improvement in the fabrication process. However, current two-dimensional (2D) ray tracing codes, especially when utilized with densely sampled surface shape data, may...

Polarization study about a telescope-based transmitter for quantum communication.

We studied the polarization evolution of a reflective telescope designed for the quantum satellite Micius. The change in polarization extinction ratio (PER) of quantum light was derived and calculated. The PER deterioration caused by increase of incidence angle was calculated to determine the boundary conditions for the system design. The performance of the Micius prototype was evaluated both theoretically and experimentally to verify the viability of our optical design. Minimum and maximum PERs of 38 and 5...

Research on the compensation of laser launch optics to improve the performance of the LGS spot.

To improve the beam quality of the uplink laser, a 37 channel piezo-ceramic deformable mirror was inserted into the laser launch optics to compensate the static aberrations. An interferometer was used as the calibration light source as well as the wavefront sensor to perform closed-loop correction for the moment. About 0.38λ root mean square (rms) aberrations, including the deformable mirror's initial figure error, were compensated, and the residual error was less than 0.07λ rms. Field observations with a...

Europe has to step up its efforts to produce innovative and safe diabetes technology.

Telescope-based cavity for negative ion beam neutralization in future fusion reactors.

In future fusion reactors, heating system efficiency is of the utmost importance. Photo-neutralization substantially increases the neutral beam injector (NBI) efficiency with respect to the foreseen system in the International Thermonuclear Experimental Reactor (ITER) based on a gaseous target. In this paper, we propose a telescope-based configuration to be used in the NBI photo-neutralizer cavity of the demonstration power plant (DEMO) project. This configuration greatly reduces the total length of the cav...


A high-efficiency proton recoil telescope was developed to determine neutron fluences in neutron fields using the 3H(d,n)4He reaction. A 2-mm thick plastic scintillation detector was employed as a radiator to increase the detection efficiency and compensate for the energy loss of the recoil proton within. Two silicon detectors were employed as the ΔE and E detectors. The distance between the radiator and the E detector was varied between 50 and 150 mm. The telescope had detection efficiencies of 3.5 × 10-...

Diabetic macular edema, innovative technologies and economic impact: New opportunities for the Lombardy Region healthcare system?

Diabetic macular edema (DME) is a leading cause of vision loss and blindness. The aim of this study was to evaluate the economic benefits of introducing additional alternative technologies (Dexamethasone intravitreal implant - DEX - and Aflibercept injections), compared with the historical scenario of Ranibizumab intravitreal injections.

The genomic history of southeastern Europe.

Farming was first introduced to Europe in the mid-seventh millennium bc, and was associated with migrants from Anatolia who settled in the southeast before spreading throughout Europe. Here, to understand the dynamics of this process, we analysed genome-wide ancient DNA data from 225 individuals who lived in southeastern Europe and surrounding regions between 12000 and 500 bc. We document a west-east cline of ancestry in indigenous hunter-gatherers and, in eastern Europe, the early stages in the formation o...

Advances in Degradable Embolic Microspheres: A State of the Art Review.

Considerable efforts have been placed on the development of degradable microspheres for use in transarterial embolization indications. Using the guidance of the U.S. Food and Drug Administration (FDA) special controls document for the preclinical evaluation of vascular embolization devices, this review consolidates all relevant data pertaining to novel degradable microsphere technologies for bland embolization into a single reference. This review emphasizes intended use, chemical composition, degradative me...

Dual use architecture for innovative lidar and free space optical communications.

An innovative and effective architecture for lidar systems is presented and experimentally demonstrated. The proposed scheme can also be easily exploited for optical communications. In particular, the system includes an innovative lidar software-defined architecture based on optically coherent detection, overcoming current drawbacks of time of flight incoherent systems. The experiments demonstrate the ability to perform long range detection resorting to the waveform compression on the continuous wave approa...

Ethylene control technologies in extending post-harvest shelf life of climacteric fruit.

Fresh fruit is important for a healthy diet. However, due to their seasonal production, regional specific cultivation and perishable nature, it is essential to develop preservation technologies to extend the post-harvest shelf life of fresh fruits. Climacteric fruit adopt spoilage because of ethylene, a key hormone associated with the ripening process. Therefore, controlling ethylene activity by following safe and effective approaches is a key to extend the post-harvest shelf life of fruit. In this review, ...

Current Practice of Airway Stenting in the Adult Population in Europe: A Survey of the European Association of Bronchology and Interventional Pulmonology (EABIP).

Airway stenting (AS) commenced in Europe circa 1987 with the first placement of a dedicated silicone airway stent. Subsequently, over the last 3 decades, AS was spread throughout Europe, using different insertion techniques and different types of stents.

Image registration for daylight adaptive optics.

Daytime use of adaptive optics (AO) at large telescopes is hampered by shot noise from the bright sky background. Wave-front sensing may use a sodium laser guide star observed through a magneto-optical filter to suppress the background, but the laser beacon is not sensitive to overall image motion. To estimate that, laser-guided AO systems generally rely on light from the object itself, collected through the full aperture of the telescope. Daylight sets a lower limit to the brightness of an object that may ...

Telescope protest, GM salmon and a giant 'dead zone'.

Dark Kinetic Heating of Neutron Stars and an Infrared Window on WIMPs, SIMPs, and Pure Higgsinos.

We identify a largely model-independent signature of dark matter (DM) interactions with nucleons and electrons. DM in the local galactic halo, gravitationally accelerated to over half the speed of light, scatters against and deposits kinetic energy into neutron stars, heating them to infrared blackbody temperatures. The resulting radiation could potentially be detected by the James Webb Space Telescope, the Thirty Meter Telescope, or the European Extremely Large Telescope. This mechanism also produces optic...

Low-order aberration correction of the TMT tertiary mirror prototype based on a warping harness.

A warping harness is proposed to simply and efficiently correct low-order aberrations that occur during manufacturing and operation of a telescope. For the Thirty Meter Telescope (TMT) tertiary mirror, the issue to be solved by the warping harness is particularly challenging due to its complicated load conditions and limited mounting space. In this study, first, a new type of whiffletree-based warping harness configuration applied to a ¼-prototype TMT tertiary mirror is presented and optimized using finite...

Biocontrol strategies for Mediterranean-style fermented sausages.

Naturally fermented meat sausages have a long tradition in Mediterranean countries and are one of the most important groups of traditional foods consumed throughout Europe. Despite all the advances in food science and technology and increased regulatory requirements and concerns for safety and quality during the last decades, the challenge to control important foodborne pathogens in this type of meat products still persists. Simultaneously, growing consumer interest in safe, high quality and minimal process...

Editorial: Optics Letters' 40th Anniversary Retrospective 2008-2013.

Alan Eli Willner, Editor-in-Chief of Optics Letters from 2008-2013, reflects on his time leading the Journal and some of the major advancements made during that period.

Self-Focusing and the Talbot Effect in Conformal Transformation Optics.

Transformation optics has been used to propose various novel optical devices. With the help of metamaterials, several intriguing designs, such as invisibility cloaks, have been implemented. However, as the basic units should be much smaller than the working wavelengths to achieve the effective material parameters, and the sizes of devices should be much larger than the wavelengths of illumination to work within the light-ray approximation, it is a big challenge to implement an experimental system that works...

Giant telescope's mobile-phone 'dead zones' rile South African residents.

Fast Science and Sluggish Policy: The Herculean Task of Regulating Biodiscovery.

New rules for access and benefit sharing (ABS) of genetic resources and associated traditional knowledge have been established by the Nagoya Protocol but have not kept up with rapid scientific and technological advances in biodiscovery. This suggests the need for innovative, transdisciplinary approaches to regulate ABS and emerging technologies.

Health technology assessments conducted in health care facilities: A strategic practice? Findings from a content analysis of HTA reports.

In this paper, we test the hypothesis that health technology assessment units located in hospitals tend to be more optimistic toward technologies that are currently in use in their organization than technologies that are not. The data include 108 health technologies assessed in 87 full-scale health technology assessment reports produced by the four main local health technology assessment units in Quebec (Canada) on behalf of decision makers from the same facility. We found that 58 (53.7 percent) of the 108 ...

Imaging and applied optics: introduction to the feature issue.

This special issue of Applied Optics contains selected papers from OSA's Imaging Congress with particular emphasis on work from mathematics in imaging, computational optical sensing and imaging, imaging systems and applications, and 3D image acquisition and display.

Video Telescope Operating Monitor (VITOM) 3D: preliminary experience in cranial surgery. Technical Case Report.

Optimal vision and ergonomics are important factors contributing to achieve good results during neurosurgical interventions. The operating microscope and the endoscope have partially filled the gap between the need for good surgical vision and maintenance of a comfortable posture during surgery. Recently, a new technology called video assisted telescope operating monitor (VITOM) or exoscope has been used in cranial surgery. The main drawback with previous prototypes was lack of stereopsis. We present the fi...

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