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1 focal axis
фокальная осьБольшой англо-русский и русско-английский словарь > focal axis
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2 focal axis
Техника: фокальная ось, фокусная ось -
3 focal axis
фокальная осьАнгло-русский большой универсальный переводческий словарь > focal axis
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4 focal axis
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5 focal axis
English-Russian dictionary of telecommunications > focal axis
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6 focal
ˈfəukəl прил.
1) мат., физ., опт. фокусный, фокальный, относящийся к фокусу - focal point focal axis focal distance focal length focal conic focal plane
2) находящийся в центре, в фокусе, в очаге;
центральный Until 1940 Shanghai was the focal centre of the Far East. ≈ До 1940 года Шанхай был центральным городом Дальнего Востока. (оптика) фокусный, фокальный - * distance /length/ фокусное расстояние - * point фокус, фокальная точка;
основная /главная/ тема или вопрос focal физ. фокусный;
focal distance (или length) фокусное расстояние ~ центральный;
she has come to be the focal point of his thinking она занимает главное место в его мыслях;
focal points основные, узловые моменты или пункты focal физ. фокусный;
focal distance (или length) фокусное расстояние ~ центральный;
she has come to be the focal point of his thinking она занимает главное место в его мыслях;
focal points основные, узловые моменты или пункты ~ центральный;
she has come to be the focal point of his thinking она занимает главное место в его мыслях;
focal points основные, узловые моменты или пункты -
7 focal
['fəuk(ə)l]прил.1) физ. фокусный, фокальный, относящийся к фокусу- focal axis
- focal distance
- focal length
- focal conic
- focal plane2) находящийся в центре, в фокусе, в очаге; центральныйUntil 1940 Shanghai was the focal centre of the Far East. — До 1940 года Шанхай был центром Дальнего Востока.
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8 focal point
Синонимический ряд:point (noun) axis; center; centre; focus; heart; hub; nerve center; nucleus; pivot; point; polestar; seat -
9 point
1) точка2) балл, очко3) деление (шкалы); румб; лимб4) заострение, остриё, острый конец || заострять, затачивать5) полигр. пункт ( единица измерения в типографской системе мер)6) пост, пункт, место7) мыс8) наконечник9) предмет11) указывать•about a point — мат. в окрестности точки
point at infinity — мат. несобственный элемент, бесконечно удалённая точка
point covers a line — т. граф. вершина покрывает ребро
point in infinity — мат. точка в бесконечности
winding number of curve with respect to point — мат. порядок кривой относительно точки (число оборотов вектора, соединяющего данную точку с точкой кривой при обходе кривой)
right two points — мор. на два румба вправо
with a point as a center — мат. с центром в точке…
- bisecting point of a segment - conditionally stable point - division point - essentially singular point - general point - generic point - horizontal control point - infinitely remote point point - material point - minimal fixed point - negatively stable point - nonessential singular point - optimum point - piercing point of a line - point of greatest concentration - positively normal point - positively stable point - right singular point - single mass point - strongly recurrent point - strongly singular point - triply rational point - uniplanar double point - unstable nodal point - upper significance pointwith respect to point — мат. относительно точки
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10 point
1) пункт
2) запятая
3) кегль
4) острие
5) острый конец
6) очко
7) расшивать
8) расшить
9) точечный
10) шпицевать
11) деление
12) <topogr.> мыс
13) точка
14) место
15) указывать
16) ставить знаки препинания
17) заострение
18) наконечник
19) предмет
20) <engin.> балл
– accessible point
– accumulation point
– adherent point
– altimetric point
– ambiguous point
– amplitude of a point
– anchoring point
– antipodal point
– at a point
– at point
– attaching point
– attachment point
– automatic set point
– barometrical point
– base point
– bending point
– binary point
– boiling point
– boundary point
– branch point
– branching point
– breaker point
– brilliant point
– burble point
– cardinal point
– center point
– check point
– chisel point
– compass-card point
– condensation point
– conjugate point
– contact point
– continuous at a point
– contraction to point
– convergence point
– corner point
– cultivator point
– Curie point
– cuspidal point
– cut point
– cutter point
– data point
– datum point
– dead point
– decimal point
– degree of point
– departure point
– dew point
– diacritical point
– diamond point
– diramation point
– discontinuity point
– divider point
– dividing point
– double point
– drill point
– east point
– enclose a point
– entry point
– equilibrium point
– equivalence point
– evaporating point
– extra-axis point
– extreme point
– finishing point
– firing point
– fix point in position
– fixed point
– flash point
– flex point
– floating point
– form point
– freezing point
– fusion point
– generic point
– glass-transition point
– glaziers' point
– gold point
– grid point
– half-power point
– hinge point
– ice formation point
– ideal point
– ignition point
– image of a point
– indication point
– infinite point
– inflection point
– initial point
– intersection point
– inverse point
– isolated point
– junction point
– labile point
– lattice point
– limit point
– linkage point
– load point
– lubrication point
– main point
– mark a point
– marker point
– mass point
– material point
– measuring point
– melting point
– mirror point
– movable point
– multiple point
– nadir point
– Neel point
– neutral point
– nodal point
– north point
– null point
– operating point
– pitch point
– point approximation
– point at infinity
– point bar
– point brilliance
– point cathode
– point conic
– point contact
– point contacts
– point corrosion
– point diode
– point disturbance
– point eikonal
– point focus
– point force
– point harmonic
– point hologram
– point in time
– point joints
– point lock
– point locking
– point mass
– point of application
– point of break
– point of connection
– point of contact
– point of control
– point of departure
– point of destination
– point of emanation
– point of inflection
– point of interpolation
– point of intersection
– point of junction
– point of lattice
– point of levelling
– point of observation
– point of osculation
– point of reference
– point of separation
– point of sight
– point of support
– point of tangency
– point of the compass
– point of tooth
– point of view
– point pile
– point radiator
– point resolution
– point scale
– point scatterer
– point set
– point source
– point spectrum
– point temperature
– point tool
– point wire
– position of a point
– power of a point
– precipitation point
– principal point
– radix point
– rail point
– ramification point
– reefing point
– reference point
– regular point
– ridge point
– saddle point
– sampling point
– saturation point
– sense point
– separation point
– sequence point
– share point
– silver point
– singing point
– singular point
– softening point
– solidification point
– spark-plug point
– spinodal point
– spiral point
– sputter point
– stagnation point
– starting point
– stationary point
– stock point
– switching point
– terminal point
– tooth point
– touch-down point
– transfer point
– transformation point
– transition point
– triangulation point
– triple point
– turning point
– umbilical point
– unit point
– up to this point
– valley point
– vanishing point
– work point
– world point
– yield point
– zenith point
azimuth of distant point — <topogr.> азимут направления на отдаленную наблюдаемую
bisecting point of a segment — <geom.> середина отрезка
control point adjustment — настройка точки регулирования, <engin.> задатчик
facing point lock — < railways> замок ригельный оконечный
fixed point computation — вычисление с фиксированной запятой
floating decimal point — <comput.> точка плавающая
including the point at infinity — включая бесконечно удаленную точку
phase separation point — <phys.> критическая точка расслаивания
point spread function — <opt.> функция аппаратная, <opt.> функция рассеяния точки
true boiling point — <phys.> температура кипения истинная
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11 distance
1. расстояние; интервал; дистанция; промежуток; пролёт; удаление2. отрезок; промежуток, период ( времени)
* * *
расстояние, дистанция; отдалённость
* * *
* * *
1) расстояние; дистанция2) интервал; отрезок•- broadside distancedistance beyond critical — сейсм. закритическое расстояние
- cable distance
- coincident distance
- critical distance
- critical reflection distance
- critical refraction distance
- crossover distance
- face-to-face distance
- free distance
- geophone distance
- geophone-to-geophone distance
- glide distance
- interwell distance
- leg center distance
- mounting distance
- offset distance
- prediction distance
- propagated distance
- propagation distance
- radial distance from hole axis
- ray-path distance
- shell-to-shell distance
- shot-point distance
- shot-point-to-geophone distance
- shot-seismometer distance
- shot-to-detector distance
- shot-to-geophone distance
- shot-to-receiver distance
- shot-to-spread distance
- source-to-receiver offset distance
- teleseismic distance
- trace-to-trace distance
- traveled distance
- traversed distance* * *• пролет• удалениеАнгло-русский словарь нефтегазовой промышленности > distance
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12 MAT
1) Компьютерная техника: Modular Administration Tool, mean acquisition time2) Американизм: Minimum Alternate Tax3) Военный термин: Medium Assault Transport, Minimum Activity Tour, mechanical aptitude test, military advisory team, military air transport, military aircraft types, mine assembly team, missile acceptance team, missile acceptance tests, missile adapter tester, missile, antitank, mobile aerial target, mobile arming tower, mobile assistance team, multiple address telegram5) Математика: Multi Auto Transformation6) Метеорология: Moist Acidic Tundra7) Юридический термин: Marijuana Action Team8) Автомобильный термин: manifold air temperature9) Биржевой термин: Moving Average Treasury10) Сокращение: Marksman Advanced Trainer, Master of Arts in Teaching, Measurement of Atmosphere Turbulence, Modular Advanced Test, Multi-Arms Trainer, multi-focal atrial tachycardia, M1 Abrams Tank, MAC Address Translation, Machine-Assisted Translation, Maintenance Access Terminal, Maintenance Augmentation Team, Maintenance Tape, Maintenance and Administration Terminal, Major Area Team, Male Annihilation Technique ( fruit flies control), Man About Town, Management Aptitude Test, Management Assistance Team, Management, Administrative, and Technological, Manual Angle Tracking, Map Administration Tool, Maryland Accessible Telecommunications Program, Master Automotive Technician, Masters in the Art of Teaching, Material/Materiel, Material/Mine Assembly Team, Materials Management, Mathematics, Matte, Maximum Attainable Throughput, Mean Annual Temperature, Media Access Time, Medical Analysis Tool, Medical Association of Thailand, Medication Administration Technician, Memory Acceleration Technology, Meridian Administration Tool, Metropolitan Achievement Test, Metropolitan Area Transit, Metropolitan Area Trunks, Michigan Association of Timbermen, Microdyne Automated Terminal, Microscopic Agglutination Test, Military Air Traffic, Miller Analogies Test, Miller Analysis Test, Minimal Aggregate Traffic, Minimum Activity Tour (US Navy), Mission Applications Tool, Mission Area Team, Mixed Air Temperature (HVAC systems), Mobile Access Terminal, Mobile Advisory Team, Mobile Aeronautical Telemetry, Mobile Agent Technology, Mobilization Assistance Team, Modular Alarm Transmitter, Module Acceptance Test, Monitoring, Analysis and Testing, Monthly Average Treasury, Morehead Area Transit (Kentucky, USA), Moscow Art Theater, Moscow Arts Theatre, Movement Area Training, Moving Annual Total, Moving Treasuries Average, Mu Alpha Theta (national high school and junior college mathematics club for honors students), Multi Axis Trainer, Multifocal Atrial Tachycardia (type of supra ventricular arrhythmia), Multiple Access Transponder, Municipal Association of Tasmania, Muscle Activation Technique, Myoskeletal Alignment Techniques11) Физиология: Maternal, Medication Administration Training12) Вычислительная техника: machine-aided translation, microalloy transistor13) Иммунология: microagglutination technique14) Транспорт: Marine Aviation Transport15) Экология: Measurement of Atmospheric Turbulence16) Деловая лексика: Machine Automation Tools, Model Action Talk, Most Appreciated Team17) Программирование: Multiply And Add To18) Автоматика: manufacturing automation technology19) Расширение файла: Micro Alloy Transistor, Table shortcut (MS Access), Matrix data file (Matlab)21) Программное обеспечение: Multimedia Authoring Tool -
13 Mat
1) Компьютерная техника: Modular Administration Tool, mean acquisition time2) Американизм: Minimum Alternate Tax3) Военный термин: Medium Assault Transport, Minimum Activity Tour, mechanical aptitude test, military advisory team, military air transport, military aircraft types, mine assembly team, missile acceptance team, missile acceptance tests, missile adapter tester, missile, antitank, mobile aerial target, mobile arming tower, mobile assistance team, multiple address telegram5) Математика: Multi Auto Transformation6) Метеорология: Moist Acidic Tundra7) Юридический термин: Marijuana Action Team8) Автомобильный термин: manifold air temperature9) Биржевой термин: Moving Average Treasury10) Сокращение: Marksman Advanced Trainer, Master of Arts in Teaching, Measurement of Atmosphere Turbulence, Modular Advanced Test, Multi-Arms Trainer, multi-focal atrial tachycardia, M1 Abrams Tank, MAC Address Translation, Machine-Assisted Translation, Maintenance Access Terminal, Maintenance Augmentation Team, Maintenance Tape, Maintenance and Administration Terminal, Major Area Team, Male Annihilation Technique ( fruit flies control), Man About Town, Management Aptitude Test, Management Assistance Team, Management, Administrative, and Technological, Manual Angle Tracking, Map Administration Tool, Maryland Accessible Telecommunications Program, Master Automotive Technician, Masters in the Art of Teaching, Material/Materiel, Material/Mine Assembly Team, Materials Management, Mathematics, Matte, Maximum Attainable Throughput, Mean Annual Temperature, Media Access Time, Medical Analysis Tool, Medical Association of Thailand, Medication Administration Technician, Memory Acceleration Technology, Meridian Administration Tool, Metropolitan Achievement Test, Metropolitan Area Transit, Metropolitan Area Trunks, Michigan Association of Timbermen, Microdyne Automated Terminal, Microscopic Agglutination Test, Military Air Traffic, Miller Analogies Test, Miller Analysis Test, Minimal Aggregate Traffic, Minimum Activity Tour (US Navy), Mission Applications Tool, Mission Area Team, Mixed Air Temperature (HVAC systems), Mobile Access Terminal, Mobile Advisory Team, Mobile Aeronautical Telemetry, Mobile Agent Technology, Mobilization Assistance Team, Modular Alarm Transmitter, Module Acceptance Test, Monitoring, Analysis and Testing, Monthly Average Treasury, Morehead Area Transit (Kentucky, USA), Moscow Art Theater, Moscow Arts Theatre, Movement Area Training, Moving Annual Total, Moving Treasuries Average, Mu Alpha Theta (national high school and junior college mathematics club for honors students), Multi Axis Trainer, Multifocal Atrial Tachycardia (type of supra ventricular arrhythmia), Multiple Access Transponder, Municipal Association of Tasmania, Muscle Activation Technique, Myoskeletal Alignment Techniques11) Физиология: Maternal, Medication Administration Training12) Вычислительная техника: machine-aided translation, microalloy transistor13) Иммунология: microagglutination technique14) Транспорт: Marine Aviation Transport15) Экология: Measurement of Atmospheric Turbulence16) Деловая лексика: Machine Automation Tools, Model Action Talk, Most Appreciated Team17) Программирование: Multiply And Add To18) Автоматика: manufacturing automation technology19) Расширение файла: Micro Alloy Transistor, Table shortcut (MS Access), Matrix data file (Matlab)21) Программное обеспечение: Multimedia Authoring Tool -
14 mat
1) Компьютерная техника: Modular Administration Tool, mean acquisition time2) Американизм: Minimum Alternate Tax3) Военный термин: Medium Assault Transport, Minimum Activity Tour, mechanical aptitude test, military advisory team, military air transport, military aircraft types, mine assembly team, missile acceptance team, missile acceptance tests, missile adapter tester, missile, antitank, mobile aerial target, mobile arming tower, mobile assistance team, multiple address telegram5) Математика: Multi Auto Transformation6) Метеорология: Moist Acidic Tundra7) Юридический термин: Marijuana Action Team8) Автомобильный термин: manifold air temperature9) Биржевой термин: Moving Average Treasury10) Сокращение: Marksman Advanced Trainer, Master of Arts in Teaching, Measurement of Atmosphere Turbulence, Modular Advanced Test, Multi-Arms Trainer, multi-focal atrial tachycardia, M1 Abrams Tank, MAC Address Translation, Machine-Assisted Translation, Maintenance Access Terminal, Maintenance Augmentation Team, Maintenance Tape, Maintenance and Administration Terminal, Major Area Team, Male Annihilation Technique ( fruit flies control), Man About Town, Management Aptitude Test, Management Assistance Team, Management, Administrative, and Technological, Manual Angle Tracking, Map Administration Tool, Maryland Accessible Telecommunications Program, Master Automotive Technician, Masters in the Art of Teaching, Material/Materiel, Material/Mine Assembly Team, Materials Management, Mathematics, Matte, Maximum Attainable Throughput, Mean Annual Temperature, Media Access Time, Medical Analysis Tool, Medical Association of Thailand, Medication Administration Technician, Memory Acceleration Technology, Meridian Administration Tool, Metropolitan Achievement Test, Metropolitan Area Transit, Metropolitan Area Trunks, Michigan Association of Timbermen, Microdyne Automated Terminal, Microscopic Agglutination Test, Military Air Traffic, Miller Analogies Test, Miller Analysis Test, Minimal Aggregate Traffic, Minimum Activity Tour (US Navy), Mission Applications Tool, Mission Area Team, Mixed Air Temperature (HVAC systems), Mobile Access Terminal, Mobile Advisory Team, Mobile Aeronautical Telemetry, Mobile Agent Technology, Mobilization Assistance Team, Modular Alarm Transmitter, Module Acceptance Test, Monitoring, Analysis and Testing, Monthly Average Treasury, Morehead Area Transit (Kentucky, USA), Moscow Art Theater, Moscow Arts Theatre, Movement Area Training, Moving Annual Total, Moving Treasuries Average, Mu Alpha Theta (national high school and junior college mathematics club for honors students), Multi Axis Trainer, Multifocal Atrial Tachycardia (type of supra ventricular arrhythmia), Multiple Access Transponder, Municipal Association of Tasmania, Muscle Activation Technique, Myoskeletal Alignment Techniques11) Физиология: Maternal, Medication Administration Training12) Вычислительная техника: machine-aided translation, microalloy transistor13) Иммунология: microagglutination technique14) Транспорт: Marine Aviation Transport15) Экология: Measurement of Atmospheric Turbulence16) Деловая лексика: Machine Automation Tools, Model Action Talk, Most Appreciated Team17) Программирование: Multiply And Add To18) Автоматика: manufacturing automation technology19) Расширение файла: Micro Alloy Transistor, Table shortcut (MS Access), Matrix data file (Matlab)21) Программное обеспечение: Multimedia Authoring Tool -
15 ellipse
eccentric circles of an ellipse — окружности, описанные из центра эллипса радиусами, равными большой и малой полуосям
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16 line
1) линия; черта || проводить линию; линовать2) строка; строчка3) геом. прямая4) конвейер; технологическая линия; поточная линия5) канат; трос; мор. линь6) трубопровод || прокладывать трубопровод7) футеровка; кладка || футеровать; выкладывать8) облицовка || облицовывать9) геом. ось10) очередь, хвост11) ряд; серия; линия; партия ( изделий)12) контур; очертания13) линия (связи)15) рельсовый путь16) горн. отвес ( для направления выработок)17) короткое письмо18) соосный || располагать соосно•in line — на одной линии; совмещённый; совпадающий
in line with — в соответствии с; согласующийся с
in straight lines — мат. прямолинейно
in the line of — в направлении, по направлению, вдоль, по линии
line tangent to — геом. касательная к
no lines — телефон. все линии заняты ( служебный сигнал)
plotted as a line — мат. выраженный [представленный] линией ( о функциональной зависимости)
to line up on approach lights — авиац. выходить на огни
to produce a line — геом. построить линию
to seize a line — телефон. занимать линию
- absorption spectral line - coaxial supply line - coaxial transmission lineto take in line — полигр. вгонять строку
- cut line- die line- downstream water line- end line- line of constant rotation - line of equal probability - multischedule private line - numerical line - projective line - properly parallel lines - real number line - section line - water-oil interface line - waveguide transmission line -
17 center
1. центр; центрировать2. центр; центральный; центрировать3. центрировать; центрСинонимический ряд:1. middle (adj.) centermost; central; equidistant; halfway; inner; intermediary; intermediate; internal; inward; mean; medial; median; mid; middle; middlemost; midmost; midway2. common (noun) common; plaza; square3. core (noun) core; essence; gist; interior; mean; middle; midpoint; midst; pith; quick; root4. point (noun) axis; focal point; focus; heart; hub; nerve center; nucleus; pivot; point; polestar; seat5. focus (verb) centralize; combine; concentrate; focus; join; meet; unify; uniteАнтонимический ряд:disperse; exterior; outer; rim -
18 central
1. n амер. телефонная станция2. n амер. телефонистка3. a расположенный в центре или около центра, центральныйcentral line — осевая линия, ось; центральная линия
central refuges — «островки безопасности» на местах выхода улиц на площади
4. a основной; самый важный; ведущий5. a центральный; главный6. a мед. связанный с центральной нервной системойСинонимический ряд:1. essential (adj.) essential; focal; fundamental2. main (adj.) axial; cardinal; chief; dominant; key; main; nuclear; overriding; overruling; pivotal; primary; principal; ruling3. middle (adj.) center; centre; equidistant; halfway; inner; interior; intermediary; intermediate; internal; inward; mean; medial; median; mid; middle; middle-of-the-road; midwayАнтонимический ряд:minor; outer; secondary -
19 centre
1. n центр; середина; центральная точка; средоточиеatomic centre — центральная часть атома, ядро
2. n центр, очаг; узел3. n часть, районthis estate takes the spillover from the centre of the city — этот район застройки примет избыточное население центра города
4. n центр, бюро; пункт5. n комплекс торговых или культурно-просветительных учрежденийshopping centre — торговый центр, комплекс предприятий торговли
day-care centre — детское учреждение, детский сад
6. n Домcultural centre — дом культуры, дворец культуры
7. n ось, стержень8. n анат. средняя точка тела, центр9. n анат. ист. вождь, лидер, руководитель10. n поэт. центр ЗемлиI will find … truth … with the centre — я под землёй до правды доберусь
11. n поэт. земля; центр мироздания12. n поэт. внутреннее кольцо мишени13. n поэт. спорт. игрок центра14. n поэт. тех. центрыtown centre — городской центр, центр города
15. n поэт. тех. шаблон, угольник16. v концентрировать, сосредоточивать17. v концентрироваться, сосредоточиваться18. v помещать, располагать в центре19. v тех. центрировать; отмечать кернером20. v «встать» во вращение, правильно начать вращение21. v уст. опираться, покоитьсяСинонимический ряд:1. middle (adj.) central; equidistant; halfway; inner; internal; medial; median; mid; middle; midway2. core (noun) core; essence; gist; mean; middle; midpoint; midst3. point (noun) axis; focal point; focus; headquarters; heart; hub; nucleus; pivot; point; root; seat4. focus (verb) centralise; centralize; combine; concentrate; converge; focus; join; meet; uniteАнтонимический ряд:edge; periphery; rim -
20 hub
1. n ступица; втулка2. n центр внимания, интереса или деятельности; «сердце», основаthe hub of the universe — центр мироздания; пуп земли
3. n геод. нивелирная рейка4. n тех. пуансон прессаСинонимический ряд:point (noun) axis; center; centre; core; crux; focal point; focus; headquarters; heart; middle; nerve center; nucleus; pivot; point; polestar; root; seatАнтонимический ряд:
См. также в других словарях:
focal plane — n a plane that is perpendicular to the axis of a lens or mirror and passes through the focus … Medical dictionary
Focal mechanism — The focal mechanism of an earthquake describes the inelastic deformation in the source region that generates the seismic waves. In the case of a fault related event it refers to the orientation of the fault plane that slipped and the slip vector… … Wikipedia
Focal surface — For a surface in three dimension the focal surface, surface of centers or evolute is formed by taking the centers of the curvature spheres, which are the tangential spheres whose radii are the reciprocals of one of the principal curvatures at the … Wikipedia
focal point — 1. Also called principal focus. Optics. either of two points on the axis of a mirror, lens, or other optical system, one point being such that rays diverging from it are deviated parallel to the axis upon refraction or reflection by the system… … Universalium
focal — adj. of, at, or in terms of a focus. Phrases and idioms: focal distance (or length) the distance between the centre of a mirror or lens and its focus. focal plane the plane through the focus perpendicular to the axis of a mirror or lens. focal… … Useful english dictionary
focal plane — In photography, an image line at right angle to the optical axis passing through the focal point. This forms the plane of sharp focus when a camera is set on infinity. Also see aperture, camera, focal length, and f/stop … Glossary of Art Terms
focal adhesions — Areas of close apposition, and thus presumably anchorage points, of the plasma membrane of a fibroblast (for example) to the substratum over which it is moving. Usually 1 x 0.2 m m with the long axis parallel to the direction of movement; always… … Dictionary of molecular biology
focal plane — Optics. 1. a plane through a focal point and normal to the axis of a lens, mirror, or other optical system. Cf. principal plane. 2. the transverse plane in a telescope where the real image of a distant view is in focus. [1890 95] * * * … Universalium
focal length — noun The distance at which something (e.g. a lens, mirror etc.) is in focus; in air it is the distance along the optical axis from a principal plane of the lens to one of the lenss focal points … Wiktionary
focal plane — fo′cal plane n. opt a plane through a focal point and perpendicular to the axis of a lens, mirror, or other optical system • Etymology: 1890–95 … From formal English to slang
focal plane — /ˈfoʊkəl pleɪn/ (say fohkuhl playn) noun 1. the plane normal to the principal axis of a lens (or system of lenses) or a mirror, which passes through the focal point. 2. the plane in which light rays from an external object are focused in a camera …