Optical       Article     History   Tree Map
  Encyclopedia of Keywords > Information > Science > Astronomy > Telescopes > Optical   Michael Charnine

Keywords and Sections
Review of Short Phrases and Links

    This Review contains major "Optical"- related terms, short phrases and links grouped together in the form of Encyclopedia article.


  1. The optical IS allows photographers to shoot at shutter speeds up to 3 stops slower with no perceptible increase in image blur due to camera shake.
  2. In the optical, the SEDs contain a blue component, indicative of an irradiated disc, and a transient near-infrared (NIR) excess.


  1. The diagram below illustrates the optical elements and the path that light takes through the telescope. (Web site)
  2. Optical fiber Main article: Optical fiber A diagram which illustrates the propagation of light through a multi-mode optical fiber.


  1. In the following, another embodiment will be explained with reference to FIG. 6 showing schematically the optical lens 16. (Web site)
  2. In one embodiment, the cleavage follows the motif of the Reed reaction and results in the chlorosulfonylation of a molecule immobilized on the optical fiber. (Web site)


  1. Light passes in a straight line from the front objective lens to a diagonal mirror located in the rear of the optical tube and directly to the eyepiece. (Web site)
  2. Then the optical path is turned 90 degrees and the focus and eyepiece are on the side of the tube. (Web site)
  3. The image guide, also consisting of optical fibers, transfers images captured by the lens down to the eyepiece where a trained operator analyzes them.


  1. For optimum image quality, it is important that the optical system of a riflescope deliver as much light as possible to the eye of the shooter.
  2. Power error is the change in the optical power of a lens as the eye looks through various points on the area of the lens.
  3. The lens or lens group closest to the eye in an optical instrument; an ocular. (Web site)


  1. This project will apply optical methods to measure scattering and absorption in a variety of human tissues and for a spectrum of normal and diseased tissue.
  2. Optical Properties: Reflection, refraction, absorption and transmission of electromagnetic radiation in solids.
  3. Empirical research has shown that attenuation in optical fiber is caused primarily by both scattering and absorption. (Web site)


  1. Optical mineralogy is the study of minerals by measuring their optical properties. (Web site)
  2. Heating even at lower temperatures for 1 to 2 h may have a measurable effect on the optical properties of the minerals. (Web site)
  3. Mineralogy is an Earth Science focused around the chemistry, crystal structure, and physical (including optical) properties of minerals.


  1. Compared to copper, optical fiber is relatively small in size and light in weight. (Web site)
  2. These are signals operating over the physical cabling (such as copper and optical fiber) or over a radio link. (Web site)
  3. When a signal "runs over copper," it means that a metal wire is used rather than a glass wire (optical fiber). (Web site)


  1. New infrared and optical images taken with the WHT suggest that this "normal" spiral galaxy hides a barlike structure in its heart. (Web site)
  2. Optical images reveal clouds of gas and dust in the Orion Nebula. (Web site)
  3. FIG. 3 is an optical schematic diagram depicting the objective lens system of FIG. 2 in combination with relay lenses for transmitting the optical images.


  1. A UFO or unidentified flying object is any object or optical phenomenon observed in the sky which cannot be identified.
  2. You can see the famous Andromeda galaxy with no optical aid at all, if the sky is dark.
  3. These datasets cover the sky at all wavelengths from gamma- and X-rays, optical, infrared, to radio waves. (Web site)

Optical Fiber Cable

  1. Optical Fiber Cable An assembly consisting of one or more optical fibers.
  2. An optical fiber cable is used as a transmission line, and optical connectors link the transmitting and receiving modules to the cable.
  3. The configuration of the star topology is done with the help of optical fiber cable, twisted pair cable or a coaxial cable. (Web site)


  1. Engaged in manufacturing and exporting of optical fiber cable.
  2. The applications of optical physics create advancements in communications, medicine, manufacturing, and even entertainment.
  3. Engaged in the manufacturing and export of optical fiber cables and split optical fiber cables.

Optical Properties

  1. A crystal's structure and symmetry play a role in determining many of its properties, such as cleavage, electronic band structure, and optical properties.
  2. The band structure determines a material's electronic properties, optical properties, and a variety of other properties. (Web site)
  3. Particle or quantum theory and wave theory are both used to explain light and color, visual and optical properties of minerals.


  1. Six major areas are covered---atomic structure, electronic structure, mechanical properties, electron transport, optical properties, and magnetism. (Web site)
  2. This band gap is one of the most useful aspects of the band structure, as it strongly influences the electrical and optical properties of the material. (Web site)
  3. These mathematicians, and in particular Ibn al-Haytham, studied optics and investigated the optical properties of mirrors made from conic sections.

Light Rays

  1. An ideal lens would allow light rays to diverge from a subject parallel to the optical axis and converge to a point when they pass through the lens. (Web site)
  2. The lens or lens system in a microscope or other optical instrument that first receives light rays from the object and forms the image. (Web site)
  3. An aberration in an optical instrument, common in Schmidt telescopes, in which the light rays come to a focus on a curved surface instead of on a plane. (Web site)


  1. Also, this sensor must be disposed on the satellite so that its optical axis is preferably parallel to or near the (-Y) axis of the satellite.
  2. The distortion in image formation occurring when a bundle of light rays enters an optical system that is not parallel to the optic axis. (Web site)
  3. An embodiment of a lens form that may achieve this effect is a telecentric lens wherein all center rays of the pixels are parallel to the optical axis. (Web site)


  1. An optical waveguide (or fiber) in which the signal travels through its core.
  2. The core of this galaxy, however, is very luminous, not only in optical, but also in ultraviolet and X-ray light.
  3. This effect is used in optical fibers to confine light in the core. (Web site)

Semiconductor Devices

  1. ATLAS enables device technology engineers to simulate the electrical, optical, and thermal behavior of semiconductor devices.
  2. The optical devices may also be integrated with other types of semiconductor devices, such as vertical field-effect transistors.
  3. The optical system may be used in a photolithography tool to pattern substrates such as semiconductor substrates and thereby produce semiconductor devices. (Web site)


  1. As of 2008, the most commonly used data storage technologies are semiconductor, magnetic, and optical, while paper still sees some limited usage.
  2. The wavelength emitted is a function of the band-gap of the semiconductor and the modes of the optical cavity. (Web site)
  3. The absorption of light in a semiconductor causes the optical power to decrease with distance. (Web site)


  1. The optical axis of the prism material is perpendicular to the plane of the diagram. (Web site)
  2. The distance from the optical center of a lens to the image plane when the lens is focused to infinity. (Web site)
  3. Wherever a plane at right angles to the optical axis is made to intersect a cone, the rays will form a circular cross section. (Web site)


  1. The confocal has a simple structure that minimizes optical loss and allows easy alignment of the optical axis.
  2. For example, a cylindrical object whose cylindrical axis is parallel to the optical axis will appear to be circular in the image plane of a telecentric lens.
  3. The focal point for a beam of light rays parallel to the optical axis of a lens or spherical mirror.

Optical Resolution

  1. The spatial resolution of a digital image is related to the spatial density of the image and optical resolution of the microscope used to capture the image. (Web site)


  1. For the optical resolution to equal the electronic resolution, the lens must produce an image with a resolution of 2.4 micrometers. (Web site)
  2. This is commonly known as digital zoom and results in a lower quality image than optical zoom, as no optical resolution is gained. (Web site)
  3. Optical Resolution is an absolute number that the camera's image sensor can physically record. (Web site)


  1. The optical spectrum includes not only visible light, but also infrared and ultraviolet.
  2. The method includes irradiating blood with optical radiation having a selected range of optical wavelengths to produce an optical spectrum. (Web site)
  3. An optical waveguide is a physical structure that guides electromagnetic waves in the optical spectrum.


  1. The optical spectrum (light or visible spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye. (Web site)
  2. Our eyes can detect the visible (optical) band, so the early telescopes were all built to observe in that part of the electromagnetic spectrum. (Web site)
  3. The optical, ultraviolet and X-ray images from which this image has been derived are visible on the panels to the left and right of the image. (Web site)


  1. Let G be the point on the optical axis from which the ray of light appears to come. (Web site)
  2. The system is focal if an object ray parallel to the axis is conjugate to an image ray that intersects the optical axis. (Web site)
  3. Gut Ray That ray in an off-axis optical system that passes through the geometric center of the optical elements.


  1. In geometrical optics the wave theory of light is ignored and rays are traced through an optical system by applying the laws of reflection and refraction.
  2. All rays of light passing through a lens are refracted (bent) except those that pass directly through a point called the optical center. (Web site)
  3. Astigmatic aberration is a lens defect (optical aberration) in consequence of which rays from a point source fail to meet at a focal point.

Optical Astronomy

  1. NOAO is a national center for optical astronomy in the United States, operated by the Association of Universities for Research in Astronomy. (Web site)
  2. This category contains articles about telescopes used for optical astronomy, as well as sub-categories for non-optical telescopes.
  3. Chapter 3 intends to clarify the importance of photometry in optical astronomy.


  1. However, astronomers may spend only a few weeks each year making observations with optical telescopes, radio telescopes, and other instruments. (Web site)
  2. By studying the sky with both radio and optical telescopes, astronomers can gain much more complete understanding of the processes at work in the universe.


  1. Astronomical interferometers are widely used for optical astronomy, infrared astronomy, submillimetre astronomy and radio astronomy.
  2. For optical astronomy, the optical components used in a telescope have very exacting requirements which require great precision in their construction.
  3. Historically, optical astronomy, also called visible light astronomy, is the oldest form of astronomy.[15] Optical images were originally drawn by hand.

Optical Viewfinder

  1. That's because, unlike the others, the a550 uses the same "phase detection" auto focus for Live View as for the optical viewfinder.
  2. Like its sibling, the Panasonic Lumix DMC-LZ1 has no optical viewfinder. (Web site)
  3. Most SLR cameras utilize a mirror to supply the optical viewfinder with its image. (Web site)


  1. There is no optical viewfinder, as the camera uses an electronic viewfinder. (Web site)
  2. All composing is done through the optical viewfinder which has more resolution than an electronic viewfinder and does not produce any delay.
  3. EVF – An electronic viewfinder is a small LCD screen that replaces the optical viewfinder on some digital cameras, especially those with long zoom lenses.

Infrared Wavelengths

  1. Infrared light, rather than visible light is used more commonly, because optical fibers transmit infrared wavelengths with less attenuation and dispersion.
  2. Although these nebulae appear different at optical wavelengths, they all appear to be bright sources of emission at infrared wavelengths. (Web site)
  3. Stars emit a continuum of light either at optical (visible) or infrared wavelengths (see below). (Web site)


  1. Chapters include discussions of optical telescopes, detectors, photometry, variable stars, astrometry, spectroscopy, and solar observations. (Web site)
  2. In lasers and detectors, quantum effects are especially important, but in optical design, wave or "physical" optics tends to dominate.
  3. Additionally, most optical systems and detectors are indifferent to polarization, so this property of the wave is also usually ignored. (Web site)


  1. Light rays parallel to the optical or principal axis are reflected from the surface in a manner that diverges from a focal point that is behind the mirror. (Web site)
  2. Almost all SLR used a front surfaced mirror in the optical path to direct the light from the lens via a viewing screen and pentaprism to the eyepiece. (Web site)
  3. This mirror is located on the optical axis and light is then transmitted through a central hole in the concave mirror onto the eyepiece. (Web site)


  1. Subject matter wherein the optical waveguide and coupler are physically joined together by a permanent connection (e.g., welding, epoxy, or adhesive putty).

Present Invention

  1. In one embodiment, the present invention provides transmitting light from the eye along an optical path to an aberration sensor.
  2. In the drawings, FIG. 1 shows an optical system 10 illustrating the principles of the present invention. (Web site)
  3. The optical system includes a wide-angle lens according to an embodiment of the present invention. (Web site)


  1. The clotting of blood or blood fluid may be observed optically, as a change in the optical property of the sample, of the patch, or both. (Web site)
  2. Optically, defocus refers to a translation along the optical axis away from the plane or surface of best focus. (Web site)
  3. Optically, non-compact designs often yield better aberration correction and a flatter field than a compact design, though with a longer optical tube length. (Web site)


  1. In fiber optics, the device which converts the electrical information carrying signal to an optical signal for transmission over an optical fiber. (Web site)
  2. A device called an Optical Network Terminal (ONT), also called an Optical Network Unit (ONU), converts the optical signal into an electrical signal.
  3. A device used to boost the strength of an electronic or optical signal, which is weakened (attenuated) as it passes through the transport network. (Web site)


  1. An image sensor is a device that converts an optical image to an electric signal. (Web site)
  2. Aspects of the invention solve theminiaturization problem by using chip level tooling during manufacturing of the optical distance sensor. (Web site)
  3. The MERL heterodyne light field camera is a modified standard camera that has a mask inserted in the optical path between the lens and the sensor. (Web site)


  1. See laser. laser diode A laser made of semiconductor materials widely used to transmit light into optical fibers.
  2. The optical path from laser 16 to the object plane 18 includes a dichroic mirror 28 onto which the light from the laser 16 is directed.
  3. A laser using a compound semiconductor of the III-V group or II-VI group is used for transmission and reception using light in such an optical communication. (Web site)


  1. It also allows you to operate your lasers very close to the plane of your optical table top.
  2. Single and multi-plate Lyot filters are often used inside the optical cavity of lasers to allow tuning of the laser. (Web site)
  3. Optical fibers attached to lasers flashed light onto the neurons, and electrodes measured the resulting neural activity. (Web site)


  1. Optical vignetting is sensitive to the aperture and can be completely cured by stopping down the lens.
  2. Natural and optical vignetting are inherent to each lens design, while mechanical vignetting is due to the use of improper attachments to the lens. (Web site)
  3. Also, lens images typically vary in intensity, decreasing from the center to the edge of the image, an optical aberration called vignetting.


  1. The shorter the wavelength of light is, the more it will be refracted by an optical surface. (Web site)
  2. In optical fibers both the propagation constant and the group velocity depend on the wavelength of the light and the state of polarization. (Web site)
  3. In optical spectroscopy, it is well known that an entity which emits light can also absorb light at the same wavelength (photon energy). (Web site)


  1. On the other hand, diffraction comes from the wave nature of light and is determined by the finite aperture of the optical elements. (Web site)
  2. An optical system in which the resolution is no longer limited by imperfections in the lenses but only by diffraction is said to be diffraction limited. (Web site)
  3. When an optical system is essentially free from aberrations, its performance is limited solely by diffraction, and it is referred to as diffraction limited.


  1. A lens or optical system which offers to the eye the image originating from another system (the objective), at a suitable viewing distance.
  2. The objective is the light-gathering lens or mirror in the optical system. (Web site)
  3. They are mounted in such a way that the back focal plane is in the same position on the optical axis of the microscope for each objective.


  1. To collimate a telescope, one lines up the optical components, the lenses, mirrors, prisms, and eyepieces, into their proper positions. (Web site)
  2. Aberration in optical systems (lenses, prisms, mirrors or series of them intended to produce a sharp image) generally leads to blurring of the image.
  3. Binoculars with prisms to shorten the optical path and erect the image may have double Porro prism design which gives a Z-shaped optical path.


  1. Information > Science > Astronomy > Telescopes
  2. Encyclopedia of Finance. > Technology > Camera
  3. Science > Physics > Radiation > X-Ray
  4. Electrical
  5. Communication > Networks > Broadcasting > Radio

Related Keywords

    * Aberrations * Angle * Aperture * Beam * Cable * Camera * Cameras * Device * Digital Zoom * Dispersion * Electrical * Electronic * Fiber * Fig * Focal * Focus * Lens * Lenses * Light * Measure * Mechanical * Microscope * Microscopes * Objective Lens * Optical Aberrations * Optical Axis * Optical Device * Optical Fiber * Optical Isomers * Optical Power * Optical System * Optical Telescopes * Optical Zoom * Optics * Radio * Refraction * Signals * Stabilization * Stabilizer * Telescope * Telescopes * X-Ray * Zoom
  1. Books about "Optical" in

Book: Keywen Category Structure

  Short phrases about "Optical"
  Originally created: September 21, 2006.
  Links checked: July 17, 2013.
  Please send us comments and questions by this Online Form
  Please click on Move Up to move good phrases up.
0.0288 sec. a=1..