The atlas is divided into pages for each spectral type, with each page containing a short description of the stellar type, characteristic spectral features, and a brief physical explantaion. If your language skills aren’t already top-notch, then this vocab quiz can get you up to speed! The haze can be reduced by shading the lens with a lens hood, which minimizes the glare. “Affect” vs. “Effect”: Use The Correct Word Every Time. Normally a roadway would cause diffuse reflection due to its rough surface. But what exactly is the UGR value? • "Dictionary" definition: A harsh uncomfortably bright light ; especially: painfully bright sunlight • Glare occurs in two ways: – Too much light – Luminance range is too large • Effects of glare: – Photobiological damage: not considered here ... disability glare factor, DGF. An experimental apparatus (glare booth) was constructed to study the effect of spectral power distribution of light sources on discomfort glare (DG) perception and its visual mechanisms. Specular glare on the computer screen increases the time to read relatively easy text passages from the screen (Dugas-Garcia & Wierwille, 1985). adjective ghostly, unearthly, eerie, supernatural, weird, phantom, shadowy, uncanny, spooky (informal), insubstantial, incorporeal, wraithlike the spectral quality of the light. if various wavelength pass through the lens material differently , the image will be out of focus. Filters can also be attached to reduce lens flare when shooting outside in bright conditions. Spectral lines are produced by transitions of electrons within atoms or ions. Normally a roadway would cause diffuse reflection due to its rough surface. 1. of or like a spectre. Use sunglasses to lessen glare. A clairvoyante was turned on, but could only say that the spectral figures, which she described, “had no brains”. Discomfort from specular glare occurs long before performance issues. CIE (L*u*v*) uniform color space. Collins English Dictionary. (of a physical quantity) relating to a single wavelength of radiation. discomfort glare factor. The 500kg, five and a half metre diameter pendant is raised and lowered on a winching system from ETS. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. This is at least the most common definition, leading to units of W/(sr cm 2 Hz). Learn more. CIE 1988 2° modified spectral luminous efficiency function for photopic vision. Spectral Power Distribution (SPD): Describes the power emanating from a light source as a function of wavelength. Filters can also be attached to reduce lens flare when shooting outside in bright conditions. physics (of a physical quantity) relating to a single wavelength of radiation spectral luminous efficiency. Lens hood (Photo Credit : ID1974/ Shutterstock) Designing such tools is often very hard and in analogue devices it is generally impossible. (of a physical quantity) relating to a single wavelength of radiation. JULIUS O. SMITH III Center for Computer Research in Music and Acoustics (CCRMA) Glare: Lighting entering the eye directly from luminaires or indirectly from reflective surfaces that causes visual discomfort or reduced visibility. CIE (L*a*b*) uniform color space. of or relating to a specter; ghostly; phantom. Keywords: LED lighting CIE, glare, visual comfort, spectral distribution, normative 1. Sensors 2020, 20(16), 4374; ... the “glare” in its physical definition (and not in a general all-inclusive sense) can instead affect results more than other causes in some specific but not infrequent conditions (darker regions contrast, proximity of bright patches Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. We Asked, You Answered. Synonym: ghostly 1.2. spectral definition: 1. coming from or seeming to be the spirit of a dead person: 2. of the set of colours into which a…. resembling or suggesting a spectrum or spectra. https://medical-dictionary.thefreedictionary.com/specular+glare. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Published by Houghton Mifflin Company. The considerations discussed here are regarding discomfort glare. Glare Discomfort caused by excessive brightness of the light source, controlled by cutting off the light rays (as with louvred or recessed luminaires) so as to prevent the light source coming directly into the normal field of vision. What is "glare"? ... Another definition of SC is the MPEG-7 spectral centroid. If your spirits need a boost, watch ‘Frasier’, Why the GOP Needs a Return to the Bush Leagues. The glare is the result of the specular reflection of the beam of light from an oncoming car. Note: UWLR also meets the LEED version 4 definition of percent uplight. The ultimate high definition vision of everything in sight. These tools usually focus on pitch shifting, but there are many other marvellous things that the spectral domain lets us accomplish, and we are just getting started! How to use glare in a sentence. of or relating to a spectrum spectral colours. spectral luminous efficiency. Lens hood (Photo Credit : ID1974/ Shutterstock) The Most Surprisingly Serendipitous Words Of The Day. Spatial–Spectral Evidence of Glare Influence on Hyperspectral Acquisitions. The following definitions are from IDA/IES MLO-2011. Gaze at him with a spectral glare, As if they already stood aghast . Cambridge Dictionary +Plus Surgery is the common, effective way to treat more vision-impairing cataracts . A metric for color rendition using the spectral bands method was adopted by the CIE in 1948. As the electrons move closer to or farther from the nucleus of an atom (or of an ion), energy in the form of light (or other radiation) is emitted or absorbed.… But Kasich and Walker face competitive re-elections; their national presence is spectral, their national potential speculative. of some laser beam, is essentially its brightness per unit optical bandwidth. Specular reflection, or regular reflection, is the mirror-like reflection of waves, such as light, from a surface. Disclaimer. Its spectral resolution is fairly coarse, as the various wavelengths of the visible spectrum are not individually distinguished and the overall reflectance in the entire visible portion is recorded. glare arising from specularly reflected light. You may recognize the spect part of the adjective spectral from words like "spectacle," "spectrum," and "spectacular." Spectre definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. distribution temperature of a light source. distribution temperature of a light source. How is it defined and used? What do you have to bear in mind as a lighting designer? Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. 1.1. CIE (L*a*b*) uniform color space. You may have heard of ghosts referred to as "specters": that means that they're spectral. At the bloody work they would look upon.' Spectral discomfort glare sensitivity was determined using ten young observers, requesting the observers to select medium glare settings of monochromatic radiations based on the de Boer glare rating scale, both at near‐foveal and 10° extra‐foveal directions of the 2° diameter glare source. #1 In Spectral Reflectance (glare) This test uses a spectrophotometer to measure the consistency of the light reflected off of the surface of a lens. Learn more. distal stimulus. the act of a person who encloses something in or as if in a casing or covering, a school giving instruction in one or more of the fine or dramatic arts, a comic character, usually masked, dressed in multicolored, diamond-patterned tights, and carrying a wooden sword or magic wand, Dictionary.com Unabridged Ruth, unhappy as she felt, determined to discover the meaning of that spectral figure. 1859, Charles Dickens, The Haunted House: 1.1.1. spectral colours. 4 Investigation of this concept continued through the 1950s, with the number of bands, their dividing wavelengths, and their relative weighting investigated by numerous researchers. “Democrat” vs. “Republican”: Where Did The Parties Get Their Names? distal stimulus. Note: UWLR also meets the LEED version 4 definition of percent uplight. spectral meaning: 1. coming from or seeming to be the spirit of a dead person: 2. of the set of colours into which a…. But if the surface is wet, water can fill in the crevices and smooth out the surface. A lower test result means a lens that will allow more light to pass through it. CIE 1988 2° modified spectral luminous efficiency function for photopic vision. What Does Amen Mean At The End Of A Prayer? The following definitions are from IDA/IES MLO-2011. The information can be presented graphically or as a numerical table. “Capital” vs. “Capitol”: Do You Know Where You’re Going? Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. “That” vs. “Which”: When Do You Use Each? 2. of or relating to a spectrum. 2 : of, relating to, or made by a spectrum especially : relating to or derived from the electromagnetic spectrum of visible light Surfaces can differ in the proportion of incident light they reflect (dark ones … Learn more. His career being theological, the events in it cannot be other than spectral. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins A starting point for evaluating glare … Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Specular Reflection Error Finding Function. But if the surface is wet, water can fill in the crevices and smooth out the surface. UGR (Unified Glare Rating) serves to define the psychological glare (visual discomfort) of lighting installations in indoor spaces. 2002 © HarperCollins Publishers 1995, 2002. discomfort glare. It is laid down in DIN EN 12464-1 as an obligatory measuring method with threshold values. Describe 2020 In Just One Word? spectral (comparative more spectral, superlative most spectral) 1. A spectral summer painted itself upon the barren lilac bushes. discomfort glare rating, DGR. Introduction A widely accepted definition of human comfort does not exist, but several metrics have been developed to quantify how much users appreciate environments, objects or interfaces. Noun: 1. spectre - a ghostly appearing figure; "we were unprepared for the apparition that confronted us" The data acquired from global radiation and direct radiation, together with specific spectral data help to determine the amount of gasses and aerosol particles in the air and also provide information on the photo-chemical formation of secondary impurities. His brother Niles, also a psychiatrist, is, for a time, married to Maris, a spectral caricature who’s never seen on the show. The American Heritage® Stedman's Medical Dictionary Of, or pertaining to, spectres; ghostly.quotations ▼ 1.1. SPECTRAL AUDIO SIGNAL PROCESSING. spectral definition: 1. coming from or seeming to be the spirit of a dead person: 2. of the set of colours into which a…. Spectral effects access the hidden world of audio signals - the spectral domain. Others give rise to delirum with spectral illusions or convulsions. The Dictionary.com Word Of The Year For 2020 Is …. discomfort glare. Of, relating to, or produced by a spectrum. The glare is the result of the specular reflection of the beam of light from an oncoming car. Spectral – a RIDI Group brand ... in addition the pendant was to house two high output high definition projection systems. Antonym: nonspectral 1.3. The spectral brightness, e.g. The haze can be reduced by shading the lens with a lens hood, which minimizes the glare. Spectral Quality Definitions. ... Spectral Control® Technology filters up to 96% of blue light, allowing only the beneficial and regulating turquoise blue light to pass through, to reduce blue blur and visible noise. CIE (L*u*v*) uniform color space. Look it up now! 3. physics. The spectralchain-rattling and moans gave me the chills. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Disabling glare, by definition, can result in reduced visual performance. Eq.1) The function S ¯ x x (f) {\displaystyle {\bar {S}}_{xx}(f)} and the autocorrelation of x (t) {\displaystyle x(t)} form a Fourier transform pair, a result is known as Wiener–Khinchin theorem . Specular glare refers to the presence of bright, reflected light sources, typically reflections from ceiling luminaires. Color Rendition (of objects): Effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference illuminant. Glare definition is - to shine with a harsh uncomfortably brilliant light. Glare: Lighting entering the eye directly from luminaires or indirectly from reflective surfaces that causes visual discomfort or reduced visibility. When something is spectral, it has a ghostlike quality; it seems to vanish or disappear. This spectral atlas contains a sample of the standard spectral type stars, peculiar stars, variable stars, and some special stars. discomfort glare rating, DGR. discomfort glare factor. Why Do “Left” And “Right” Mean Liberal And Conservative? spectral. Glare, also referred to as flare, is often defined as a Human Visual System (HSV) condition which causes a reduced capability to see details, due to an unsuitable distribution of luminance in the scene [1,2].Unfortunately, the term “glare” is used to refer both to the cause and to the effect of this phenomenon, as in the definition above which is a description of the effects, not of the cause. ... disability glare factor, DGF. ... Spectral Control® Technology filters up to 96% of blue light, allowing only the beneficial and regulating turquoise blue light to pass through, to reduce blue blur and visible noise. 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