optical horizon definition
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- The horizon or skyline is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that do not.ith d in miles and h in feet, Examples, assuming no refraction: 1  For an observer on the ground with eye level at h = 5 ft 7 in (1.70 m), the horizon is at a distance of 2.9 miles (4.7 km). 2  For an observer standing on a hill or tower 100 feet (30 m) in height, the horizon is at a distance of 12.2 miles (19.6 km).
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Vision (Astron.) the arc which measures the least distance from the sun at which, when the sun is below the horizon, a star or planet emerging from his rays becomes visible. Beatific vision. (Theol.) the immediate sight of God in heaven.
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Panoramic photography Panoramic photography. Panoramic photography is a technique of photography, using specialized equipment or software, that captures images with horizontally elongated fields of view. It is sometimes known as wide format photography.
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Objective (optics) Objective (optics) In optical engineering, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image. Objectives can be a single lens or mirror, or combinations of several optical elements. They are used in microscopes, telescopes, cameras, slide projectors, CD players and many other optical instruments. Objectives are also called object lenses, object glasses, or objective glasses
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- What is Optical flow. 1. The pattern of apparent motion of objects, surfaces, and edges in a visual scene caused by the relative motion between an observer (an eye or a camera) and the scene.Learn more in: Modeling and Visual Navigation of Autonomous Surface Vessels.Find more terms and definitions using our Dictionary Search.. The pattern of apparent motion of objects, surfaces, and edges in a visual scene caused by the relative motion between an observer (an eye or a camera) and the scene. Learn more in: Modeling and Visual Navigation of Autonomous Surface Vessels. Find more terms and definitions using our Dictionary Search.
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lens Any lens that is not of curved form. 2. A contact lens in which the back optic zone radius is longer than the flattest meridian of the cornea. This definition may not be valid for a soft lens that may have a back optic zone radius longer than the flattest meridian of the cornea and yet not be flat fitting.. crystalline lens; the transparent, biconvex body separating the posterior chamber and the vitreous body of the eye. The crystalline lens refracts (bends) light rays so that they are focused on the retina.
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- UTAS Home › Faculty of Science Engineering and Technology › Mathematics & Physics › Research › Physics › Optical Astronomy Description The main research interests of the optical astronomy group are in the following areas: Exoplanet search and characterisation; Gravitational microlensing; the Magellanic Clouds; Local Group dwarf galaxies; Cataclysmic variables
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Translations for soil horizon A soil horizon is a layer parallel to the soil surface, whose physical characteristics differ from the layers above and beneath. Each soil type usually has three or four horizons. Horizons are defined in most cases by obvious physical features, chiefly colour and texture. These may be described both in absolute terms and in terms relative to the surrounding material, i.e. ‘coarser’ or ‘sandier’ than the horizons above and below. Water dissolves and removes nutrients as it passes ...
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Non-Optical Astronomy Non-Optical Astronomy. Revised: Oct. 2017 [W]here are the words to describe the glorious colours that are unknown to earthly eyes? - The Gods of Mars, Edgar Rice Burroughs. Non-optical astronomy is the study of the sky through forms of energy and particles that we cannot see with our unaided senses.
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General Astronomy/Print version Definition of EVENT HORIZON. : the surface of a black hole: the boundary of a black hole beyond which nothing can escape from within it.ADVERTISEMENT. the surface of a black hole: the boundary of a black hole beyond which nothing can escape from within it. ADVERTISEMENT.
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VMware HorizonÂ® VMware Horizon Overview. Loading... Simplifying the New World of End-User Computing. The scope of end-user computing is expanding, as the workforce adopts more and more devices and platforms that provide mobility and productivity anywhere.
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The Observer The Horizon Coordinate system is defined with respect to an individual observer standing on the earth. The horizon in astronomy is not quite the same as the horizon we see on earth. It is idealized to be free from geographical effects such as mountains, valleys, or even the bending of the earth. It is a flat plane tangent to the earth's surface where the observer is standing.
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Atmospheric optics Atmospheric optics. A colorful sky is often due to scattering of light off particulates, as in this photograph of a sunset during the October 2007 California wildfires. Atmospheric optics deals with how the unique optical properties of the Earth's atmosphere cause a wide range of spectacular optical phenomena. The blue color of the sky is a direct result of Rayleigh scattering which redirects higher frequency (blue) sunlight back into the field of view of the observer.
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- For example, Figure 5.22(a) shows an optical photograph of the Orion Nebula (a huge cloud of interstellar gas) taken with the 4 m telescope on Kitt Peak. Figure 5.22(b) shows a radio contour map of the same region superimposed on the optical image.
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Definitions &Translations 1. the range of interest or activity that can be anticipated; - Example: It is beyond the horizon of present knowledge. [syn: horizon, view, purview] The Collaborative International Dictionary of English v.0.48:Purview \Purview\, n. [OF. purveu, pourveu, F. pourvu, provided, p. p. of OF. porveoir, F. pourvoir. See Purvey, View, and cf.
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Peripheral vision Field of view of the human eye. Peripheral vision is a part of vision that occurs outside the very center of gaze. There is a broad set of non-central points in the visual field that is included in the notion of peripheral vision.
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Enophthalmos Enophthalmos: Introduction. Enophthalmos: A condition which is characterized by the recession of the eyeball into one's orbit. See detailed information below for a list of 24 causes of Enophthalmos, Symptom Checker, including diseases and drug side effect causes. » Review Causes of Enophthalmos: Causes | Symptom Checker ».
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Ultraviolet astronomy Ultraviolet astronomy is the observation of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres; shorter wavelengths—higher energy photons—are studied by X-ray astronomy and gamma ray astronomy. An ultraviolet light is not visible to the human eye. Light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space.
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Glossary of Eye Care Terms - A-B A-B | C-D | E-H | I-L | M-O | P | Q-S | T-Z. Abbe value A measure of the tendency of an eyeglass lens material to cause chromatic aberration, which is an optical distortion that causes colored halos or fringes around lights or blurred vision, especially when looking through the periphery of the lens.
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OBJECTIVE LENS • OBJECTIVE LENS (noun) The noun OBJECTIVE LENS has 1 sense: 1. the lens or system of lenses in a telescope or microscope that is nearest the object being viewed. Familiarity information: OBJECTIVE LENS used as a noun is very rare. Dictionary entry details.
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Optical phenomena Optical phenomena include those arising from the optical properties of the atmosphere; the rest of nature (other phenomena); of objects, whether natural or human-made (optical effects); and of our eyes (Entoptic phenomena).ptical phenomena include those arising from the optical properties of the atmosphere; the rest of nature (other phenomena); of objects, whether natural or human-made (optical effects); and of our eyes (Entoptic phenomena).
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optic axis see external bulbar axis (above). a line passing through the apex of the bony orbit and the center of the opening of the orbit. an imaginary line extending through the anterior and posterior poles of the eye. an imaginary line passing from the midpoint of the visual field to the fovea centralis.
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- It doesn't fit with their alleged party objectives or any tactics they've ever employed. - Siemens's Continuous Tank of Dollond's invention of achromatic telescope objectives in 1 757, a demand first arose for optical glass, the industry was unable to furnish suitable material.
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Electronic viewfinder (March 2011). An electronic viewfinder (EVF) is a camera viewfinder where the image captured by the lens is projected electronically onto a miniature display. The image on this display is used to assist in aiming the camera at the scene to be photographed.
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- An electronic viewfinder (EVF) is a camera viewfinder where the image captured by the lens is projected electronically onto a miniature display.
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Medical Definition of Objective home / medterms medical dictionary a-z list / objective definition Medical Definition of Objective Objective: In a microscope, the objective (also called the objective lens) is the lens nearest to the object being examined whereas the lens closest to the eye is termed the ocular (the eyepiece). The light microscope today is usually binocular (with one ocular for each eye) and has a turret bearing a selection of objective lens. What Kind of Doctor Do I Need? Slideshow