- focal circle
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фокальный круг
Англо-русский словарь терминов металлургии и сварки. 2011.
focal circle
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Circle of confusion — For the closely related topic in microscopy, see Point spread function. In optics, a circle of confusion is an optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source. It is also known as… … Wikipedia
circle of confusion — the indistinct circular patch formed by a lens representing the out of focus image of a single object point called also blur circle; compare circle of least confusion * * * Photog. a circular spot on a film, resulting from the degree to which a… … Useful english dictionary
Logan Circle (Philadelphia) — Infobox nrhp | name =Logan Square nrhp type = caption = Swann Fountain in Logan Circle location= Philadelphia, Pennsylvania lat degrees = 39 lat minutes = 57 lat seconds = 28.16 lat direction = N long degrees = 75 long minutes = 10 long seconds … Wikipedia
Caitlin Cooke — 6teen character name = Caitlin Cooke age = 16 [ 6teen . Sweet 6Teen . August 31, 2007.] gender = Female eyecolor = Green haircolor = Blonde job = The Big Squeeze ancestry = English relatives = Father Mother nicknames = Cait Lemon Head by Tricia… … Wikipedia
Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry … Wikipedia
Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole … Wikipedia
telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… … Universalium
Hyperfocal distance — In optics and photography, hyperfocal distance is a distance beyond which all objects can be brought into an acceptable focus. There are two commonly used definitions of hyperfocal distance , leading to values that differ only slightly:The first… … Wikipedia
optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… … Universalium
Crop factor — The outer, red box displays what a 24×36 mm sensor would see, the inner, blue box displays what a 15×23 mm sensor would see. (The actual image circle of most lenses designed for 35 mm SLR format would extend further beyond the red box than shown… … Wikipedia
Depth of focus — For the seismology term, see Depth of focus (tectonics). Depth of focus is a lens optics concept that measures the tolerance of placement of the image plane (the film plane in a camera) in relation to the lens. In a camera, depth of focus… … Wikipedia
