Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

an introduction to active & adaptive optics Active Optics is used to overcome the first limitation and Adaptive Optics the latter, giving ultimately images near the diffraction limit of the primary mirror. For a 4-m telescope, atmospheric distortion degrades the spatial resolution by more than one order of magnitude compared with the diffraction limit, and the intensity at the center of the star image is lowered by a factor of 100 or more. Active optics is very much at the heart of the segmented 10-m Keck primary mirror, in operation since 1992 on Mauna Kea, Hawaii and of e.g. www.eso.org /projects/aot/introduction.html   (2514 words)

Edmund Optics Both CCD and Monitor Resolutions are often given in terms of "TV line resolution," which is a test performed using an EIA Test Pattern target. Resolution, as well as contrast, is higher in monochrome systems due to lower signal degradation. Where pixel resolution proves to be the most beneficial is in the use of video capture devices. www.edmundoptics.com /techSupport/DisplayArticle.cfm?articleid=266   (1579 words)

Resolution Students investigate images to recognize that resolution means sharpness of images and the ability to separate closely spaced objects. One way to show students that resolution is a characteristic of the entire image is to have them plot their graphs on overhead graph paper and overlay them. Although issues of image quality can affect resolution, when we talk about resolution we are referring specifically to the ability to distinguish two objects from one another on the image. hou.lbl.gov /~vhoette/Explorations/OpticalPowers/8-resolution.html   (2477 words)

Sensors - April 2000 - Machine Vision Optics   (Site not responding. Last check: 2007-10-13) Resolution is a measurement of the imaging system’s ability to reproduce object detail. Two different but related resolutions are in play here: the resolution in object space (the size of elements in the object that can be resolved) and image space resolution (a combination of lens resolution and camera resolution). The sensor’s line pair resolution can be no more than half the number of pixels on the sensor because a minimum of two pixels is required to discern a fl and white area. www.sensorsmag.com /articles/0400/34/main.shtml   (3356 words)

Spectrometer achieves sub-angstrom optical resolution., Ocean Optics, Inc. The HR4000, available for $4,999, has a new 3648-element CCD-array detector from Toshiba and achieves optical resolution to 0.2 E (FWHM) with a 4-inch focal length, a feature that is normally associated with larger 1-meter focal length systems. Ocean Optics is a leading supplier of solutions for optical sensing - fundamental methods of measuring and interpreting the interaction of light with matter. Ocean Optics is part of the Halma Group of safety and detection companies, a U.K.-based multinational with 2003 sales of over $500 million. news.thomasnet.com /fullstory/459385   (1039 words)

VTT Elektroniikka   (Site not responding. Last check: 2007-10-13) The fusion of optics and optomechanics has been earlier demonstrated by the integration of optical functions directly to the high-accuracy optomechanical parts of various non-imaging optical systems. The increased accuracy of the manufacturing of complex-shaped mechanical parts has also lead to the possibility of using the CNC machining in the reformation of the optomechanics for the imaging optical systems. In this paper we will give an example of the high-resolution imaging optics taking advantage of the use of CNC machining. www.ele.vtt.fi /research/ope/references/lios.htm   (334 words)

Optical Research Associates - Optics for Kids   (Site not responding. Last check: 2007-10-13) Optics (optical science) and optical engineering are specialized but very useful and interesting fields, though there are many, many other areas too. OSA (Optical Society of America) has a great educational web site that is also called "Optics for Kids." This site has a colorful, graphics-rich interface and provides many fun and educational features including articles, experiments, and lesson plans (http://www.opticsforkids.org/teach/teach.cfm) arranged by grade level. The optics pages discuss a lot of basic optical concepts with a useful approach that is geared toward the importance of these concepts to the actual use of the optics. www.opticalres.com /kidoptx.html#StartKidOptx   (2346 words)

VIS Documentation - Optics for the Low and Medium Resolution Cameras   (Site not responding. Last check: 2007-10-13) In the secondary optics the light is reflected by an angle of ~41° by the off-axis parabolic surface of M3 and becomes nearly collimated. The resolution of the optics for the low-resolution and medium-resolution cameras is summarized by the `spot' diagrams in Figure 4. The modulation transfer functions (MTFs) of the optics, exclusive of the sensor, are given in Table 3 for the low- and medium-resolution cameras. blanc.physics.uiowa.edu /vis/vis_description/node05.html   (635 words)

McPherson High Resolution and Vacuum Monochromators, Spectrometers, Optics and more... Spherical mirrors are ideal for use in commercial scanning instrumentation because their shape permits the use of master polished optics. Parabolic mirrors are ideal for imaging when used on axis, when moving off axis however (dispersion or spatial plane) it is not uncommon to see a factor 10 or more, reduction in their imaging performance. Due to the multiple interfaces resolution is not as good as with proximity coupled devices or devices which have no scintillator. www.mcphersoninc.com /imagingspectroscopy.htm   (1058 words)

[No title]   (Site not responding. Last check: 2007-10-13) The performances of three set-ups for high-resolution powder diffraction, which are based on Bragg diffraction optics with bent perfect Si or Ge crystals, are discussed. By focusing in real and momentum space considerably higher luminosity and resolution are obtained than in conventional diffractometers using plane crystals and Soller collimators. Further improvements in the resolution and luminosity are possible by using thinner bent crystals (better resolution), sandwich-type monochromator (higher luminosity), and/or doubly-bent designs for simultaneous vertical and horizontal focusing [3]. www.za.iucr.org /iucr-top/cong/17/iucr/abstracts/abstracts/E0638.html   (269 words)

Lens sharpens microscope resolution (August 2002) - News - optics.org German researchers improve the axial resolution of a confocal microscope by 34%. Stefan Hell and Carlo Mar Blanca from Germany's Max Planck Institute of Biophysical Chemistry have improved the axial resolution of a confocal two-photon microscope to 330nm. This beats the previous resolution limit of 500 nm by 34%. optics.org /articles/news/8/8/37/1   (328 words)

Amateur Adaptive Optics   (Site not responding. Last check: 2007-10-13) Wallis and Provin described what seemed to be a resolution limit in AMOACP (Ch.4) and derived both an expression for that limit and what seemed to be a reasonable explanation for that limit. The use of the ST-4 and the first crack in the resolution wall had hinted at GUIDING as being a larger factor than Wallis and Provin had previously thought it was. With a resolution limit of 24.3/A, a C-8 and an ST-7 (9 um pixels) were a good match but as the 'limit' passes 10./A then a C-11 and an ST-7 become a good match and it will require a film like 2415 to take advantage of this fast guider system on smaller scopes. voltaire.csun.edu /ao.html   (1522 words)

RAWSON OPTICS: CONSULTING, DESIGN AND PROTOTYPING OF OPTICAL SYSTEMS   (Site not responding. Last check: 2007-10-13) Rawson Optics, Inc. is expert in the design of optical lenses and optical systems, using modern lens design programs. Rawson Optics, Inc. is experienced in building, assembling, and testing the mechanical structures required for functional or production prototypes of optical systems and subsystems. He has served as Topical Editor for Fiber Optics for the Journal of the Optical Society of America (JOSA), and is a member of the OSA Engineering Committee. www.rawsonoptics.com   (658 words)

High-resolution Keck Adaptive Optics Imaging of  Violent Volcanic Activity on Io High-resolution Keck Adaptive Optics Imaging of Violent Volcanic Activity on Io High-resolution Keck Adaptive Optics Imaging of Violent Volcanic Activity on Io Marchis, I. de Pater, A.G. Davies, H.G. Roe, T. Fusco, D. Le Mignant, P. Applying the MISTRAL (Conan et al., 1998), a deconvolution method developed by ONERA and especially aimed at AO observations of planetary objects, we enhanced the sharpness of the image and achieve a final resolution of 35 mas in H band (1.62 microns), equivalent to the diffraction limit of the this 10-m telescope. The spatial resolution is 105 km on Io's surface, roughly three times better than the most of the global images of Galileo/NIMS (Doute et al., 2001). astron.berkeley.edu /%7Efmarchis/Science/IoKeck   (788 words)

High Resolution Spectroscopy Kauppinen constructed a Fourier transform spectrometer, which possessed the world record of resolution for more than two decades. Numerous IR-spectra have been measured with the highest resolution in the world. A new very high resolution FT-IR spectrometer is under construction in our laboratory. www.physics.utu.fi /optics/high.html   (156 words)

Vanns.com: Meade ETX60AT Astro Telescope (ETX-60AT) Compare This telescope utilizes it's high quality optics to the fullest, giving you the power and resolution you need for clear viewing of thousands of celestial objects including nebulae, star clusters and Saturn's rings (including the Cassini division). From high-quality optics and large aperture for clear, bright images to the included field tripod and Autostar Computer Controller. All the ETX telescopes are stunningly beautiful, ultraportable, and highly versatile telecope systems with unprecedented optical resolution and performance. www.vanns.com /shop/servlet/item/compare/411449211   (1585 words)

Adaptive Optics High Resolution Spectroscopy: Present Status and Future Direction - Ge (ResearchIndex)   (Site not responding. Last check: 2007-10-13) High resolution spectroscopy experiments with visible adaptive optics telescopes at Starfire Optical Range and Mt. Wilson have demonstrated that spectral resolution can be routinely improved by a factor of ¸ 10 over the seeing-limited case at visible wavelengths. Ge et al., "Adaptive optics high resolution spectroscopy: present status and future directions", Imaging the Universe In Three Dimensions: Astrophysics With Advanced Multi-Wavelength Imaging Devices, ed. Design of the 6.5 m MMT adaptive optics system, and results.. citeseer.ist.psu.edu /ge00adaptive.html   (318 words)

School of Physics: Colloquia and Seminars in Fall 2003   (Site not responding. Last check: 2007-10-13) The transition to high-resolution adaptive optics is not simply a matter of scaling the existing low-resolution adaptive optics hardware. In most cases the existing adaptive optics architectures based on wavefront reconstruction and the phase-conjugation approach are not scalable, and should be replaced by principally different adaptive control system architectures. He has published over 230 papers and four books on the subjects of adaptive optics, nonlinear spatio-temporal dynamics, imaging through turbulence, parallel image processing and correction, optical synergetics, optimal control theory, and optical neural networks. www.physics.gatech.edu /colloquia-seminars/colloquia/120303.html   (332 words)

Ocean Optics Home Ocean Optics is a leading supplier of solutions for optical sensing -- fundamental methods of measuring and interpreting the interaction of light with matter. Ocean Optics products are used in numerous applications across a wide range of markets. Ocean Optics is part of the multinational Halma Group of safety and detection companies. www.oceanoptics.com   (501 words)

Night Vision Binoculars - Fujinon 8X50 Their high-quality optics were developed specifically to interact with the latest image intensifier technology: they produce a clear and bright image, rich in detail, with a resolution of up to 80 line pairs per mm. A high-end image intensifier should be preferred for professional applications, in order to exploit the huge potential of the optics to the full. Please remember that exports of the Fujinon 8x50 FMTR D/N with image intensifiers may be subject to special restrictions: the obligation to procure an export license is the responsibility of the exporter. www.monkoptics.co.uk /Fuji/night-vision-binoculars.html   (480 words)

Leica inh200 - Product Overview   (Site not responding. Last check: 2007-10-13) The INH200 is based on the upper part of the Leica INM200 microscope including its entire reflected light axis and has the same high automation level. All internal optics are prepared to work with UV-illumination so that the INH200 can easy be retrofitted to UV later on. The option of the focussing turret simplifies the integration work as the customer can rely on a field-proven focussing-system (just press the focus-button) and it avoids also to move heavy stages in z-direction. www.semiconation.com /inh200.html   (243 words)

MARCI-Abstract These objectives will be met through the acquisition of images over a range of time and spatial scales. Each camera is characterized by small physical size (~6 X 6 X 12 cm, including baffle, and < 500 gm), low power requirements (< 2.5 W, including power supply losses), and high science performance (1000 X 1000 pixel, low noise). Optics two 5-element refractive catadioptric lens with two lenses with dichroic spherical mirrors and six beamsplitter refractive elements FOV 140 degrees (limb to limb @ 6 degrees (42 km @ 400 km 400 km altitude) altitude) IFOV 2.4 mrad 0.96 km (nadir) 102 µ rad 41 m (nadir) 4.1 km (limb) @ 400 km alt. barsoom.msss.com /mars/surveyor/ms98/orbiter/marci/abstract/abstract.html   (598 words)

Edmund Optics - 1951 USAF Glass Slide Resolution Targets Resolution test slides with the 1951 USAF test pattern are available in either positive (chrome pattern on clear background) or negative (clear pattern on a chrome background). The positive pattern is recommended for quality control of microscopes and magnifiers. Each is boxed and includes resolution value chart. www.edmundoptics.com /IOD/DisplayProduct.cfm?productid=1790   (188 words)

Spectrometer achieves optical resolution to 0.035 nm., Ocean Optics, Inc.   (Site not responding. Last check: 2007-10-13) The exceptional 0.035 nm optical resolution of the HR2000+ is achieved by using the Ocean Optics High-resolution Optical Bench - a 25.4-mm diameter, 101.6-mm focal length, symmetrical crossed Czerny-Turner optical design. The HR2000+ is responsive from 200-1100 nm, but its specific range and resolution depend on a user's grating and entrance slit selections. Ocean Optics is part of the Halma Group of safety and detection companies, a United Kingdom-based multinational corporation with 2003 sales of nearly $550 million. news.thomasnet.com /fullstory/461482   (878 words)

Microbolometers offer high resolution at room temperature (May 2001) - Opto & Laser Europe - optics.org Microbolometer arrays, which consist of detectors made from materials in which the electrical resistivity changes with temperature, produce high-resolution images but do not require cryogenic cooling. The increased resolution of focal plane arrays and microbolometer systems allows the detection of tiny temperature variations. Jean-Pierre Chatard, technical and business director at Sofradir, a company based in Chatenay-Malabray, France, said: "The commercial market is already big (10 000 a year) and will rise in the next three years to half a million per year. optics.org /articles/ole/6/5/5/1   (1744 words)

Secondary optics   (Site not responding. Last check: 2007-10-13) The Programmable Receiving Slit is basically a slit that is programmable to optimise the intensity and resolution for the different experiments and it can be used with every primary optics other than the hybrid. The PSD should only be used with the Crossed Slits, as the Monocapillary Optics has too low intensity, the Hybrid Mirror only goes with the Triple Axis/Rocking Curve, and the X-ray Mirror is often too high in intensity. When using the Crossed Slits as the primary optics, it is a good idea to make a test scan using the Parallel Plate Collimator. web.utk.edu /~xling/xpert_secondary.htm   (552 words)

Slide30   (Site not responding. Last check: 2007-10-13) We know from Don Miller's dissertation research at the Institute of Optics at the University of Rochester prior to coming to Indiana University that if the optical system of the eye is well corrected, it becomes possible to view the smallest neurons of the retina, the photoreceptors. This slide shows the most recent photograph of the array of cones in a living eye taken by the research team of David Williams, who was Don's mentor at U. Rochester. One of Don Miller's goals is to reproduce this achivement here at Indiana and to apply that technology for the benefit of clinical optometry and ophthalmology. www.opt.indiana.edu /people/faculty/thibos/LNT_DFL/slide30.html   (125 words)

Handbook of Charged Particle Optics New, Used Books, Cheap Prices, ISBN 0849325137 This timely handbook contains chapters on the essential elements of high resolution charged particle optics and is written by many of the world's leading research scientists. It is a complete guide to understanding, designing, and using high resolution instrumentation such as transmission electron microscopes (TEMs), scanning electron microscopes (SEMs), scanning transmission electron microscopes (STEMs), and focused ion beam (FIB) systems. Handbook of High Resolution Charged Particle Optics explains how and why high resolution instruments work and how to apply this information when designing or using them. www.bookfinder4u.com /detail/0849325137.html   (325 words)

McPherson High Resolution Monochromators, Spectrometers, Optics and more... It offers white light bypass optics as well as diverting optics when the use of the spectrometer is required. The Model 231M4 - designated for synchrotron applications - is a all-metal-seal UHV design with bilaterally adjustable slits, a multiple (3) grating turret, and an ion pump system suitable for operating at base pressures of 10-10 torr. Unique slit assemblies are available that include 'bypass' optics, allowing the user to permit energetic synchrotron or FEL beams to enter the monochromator or pass-by for another experiment further down the beam line. www.mcphersoninc.com /spectrometers/vuvuvvis/model231ss.htm   (353 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.