light focusing

  • 81Depth-of-field adapter — A depth of field adapter (often shortened to DOF adapter) is used to achieve shallow depth of field on a video camera whose fixed lens or interchangeable lens selection is limited or economically prohibitive at providing such effect. A DOF… …

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  • 82Photoionization mode — A photoionization mode gives rise to a photoionization pattern, having very specific characteristics in terms of photoionization spatial distribution and density, as well as relative yields of photolytic species. A particular photoionization mode …

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  • 83Lenses for SLR and DSLR cameras — This article is about photographic lenses for single lens reflex film cameras (SLRs) and digital single lens reflex cameras (DSLRs). Furthermore, the emphasis is on modern lenses for 35 mm film SLRs and for DSLRs with sensor sizes less than or… …

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  • 84Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …

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  • 85Aperture — For other uses, see Aperture (disambiguation). f stops demonstrated on a lens …

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  • 86Lens (anatomy) — Crystalline lens (anatomy) Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens …

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  • 87Optical microscope — Microscope Uses Small sample observation Notable experiments Discovery of cells Inventor Hans Lippershey Zacharias Jans …

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  • 88Ring imaging Čerenkov detector — A Ring Imaging Čerenkov detector (RICH detector) is a particle detector that can determine the velocity, v , of a charged fundamental particle. This is done by an indirect measurement of the Čerenkov angle, heta c , i.e. the angle between the… …

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  • 89Skandha — Buddhist term pi= khandha sa= स्कन्ध (skandha) zh=五蘊(T) / 五蕴(S) zh Latn=wǔyùn vi=Ngũ uẩn ja=五蘊 bo=ཕུང་པོ་ལྔ་ bo Latn=phung po lnga en=aggregate, mass, heap my=ခန္ဒာငါးပါး my Latn=IPA|kʰà̃ dà ŋá bá khan da nga: ba:In Buddhist phenomenology and… …

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  • 90Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …

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  • 91Infrared photography — Top: tree photographed in the near infrared range. Bottom: same tree in the visible part of the spectrum …

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  • 92Laser safety — A typical laser warning symbol. Laser safety is safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to… …

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  • 93religion — religionless, adj. /ri lij euhn/, n. 1. a set of beliefs concerning the cause, nature, and purpose of the universe, esp. when considered as the creation of a superhuman agency or agencies, usually involving devotional and ritual observances, and… …

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  • 94Nonlinear optics — (NLO) is the branch of optics that describes the behaviour of light in nonlinear media, that is, media in which the dielectric polarization P responds nonlinearly to the electric field E of the light. This nonlinearity is typically only observed… …

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  • 95Quantum dot — Part of a series of articles on Nanomaterials Fullerenes …

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  • 96The Cantos — by Ezra Pound is a long, incomplete poem in 120 sections, each of which is a canto . Most of it was written between 1915 and 1962, although much of the early work was abandoned and the early cantos, as finally published, date from 1922 onwards.… …

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  • 97Negative index metamaterials — A negative index metamaterial causes light to refract, or bend, differently than in more common positive refractive index materials. Negative index metamaterials or negative index materials (NIM) are artificial structures where the refractive… …

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  • 98Macro photography — is close up photography; the classical definition is that the image projected on the film plane (i.e., film or a digital sensor) is close to the same size as the subject. On 35 mm film (for example), the lens is typically optimized to focus… …

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  • 99eyeball — eyeballer, n. /uy bawl /, n. 1. the ball or globe of the eye. v.t. 2. Informal. to look at, check, or observe closely: two opponents eyeballing each other. [1580 90; 1900 05 for def. 2; EYE + BALL1] * * * ▪ anatomy  spheroidal structure… …

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  • 100Economic Affairs — ▪ 2006 Introduction In 2005 rising U.S. deficits, tight monetary policies, and higher oil prices triggered by hurricane damage in the Gulf of Mexico were moderating influences on the world economy and on U.S. stock markets, but some other… …

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