TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Complete dislocation of the crystalline lens from the pupillary aperture.  3, record 1, English, - dislocation%20of%20the%20lens

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Déplacement complet du cristallin par rapport à l'axe de l'œil, qui peut être congénital ou causé par une contusion.  2, record 1, French, - luxation%20du%20cristallin

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The point above a microscope eyepeice where the image is focused and where the eye should be positioned for viewing.  4, record 2, English, - eyepoint

Record number: 2, Textual support number: 1 CONT

after emerging from the eye lens, all these pencils pass through a small circular area called the eyepoint, or the Ramsden circle. This area is the image that the eyepiece forms of the objective aperture.  3, record 2, English, - eyepoint

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Dans un microscope [...] on nomme cercle ou anneau oculaire l'image réelle de l'objectif donnée par l'oculaire. Ce petit cercle brillant marque la place que doit occuper la pupille de l'œil pour apercevoir l'ensemble du champ de l'instrument.  2, record 2, French, - point%20oculaire

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Exposure meter built into a camera which determines or controls the lens aperture to provide proper exposure.  1, record 3, English, - electric%20eye

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Posemètre incorporé dans l'appareil photographique et qui détermine ou modifie l'ouverture de diaphragme afin d'obtenir l'exposition correcte.  1, record 3, French, - %26oelig%3Bil%20%C3%A9lectrique

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

Abbe’s diffraction limit amounts for the shortest wavelength of visible light to about 200 nm [nanometers] for the lateral resolution. Smaller details cannot be resolved.  2, record 4, English, - Abbe%26rsquo%3Bs%20diffraction%20resolution%20limit

Record number: 4, Textual support number: 1 OBS

The light microscope's limited spatial resolution was first recognized by Ernst Abbe at the end of the 19th century... Abbe found that objects closer than about one-third of the wavelength of light could not be distinguished, because this is the smallest focal spot size that is allowed by diffraction when focusing with a lens of high numerical aperture.  1, record 4, English, - Abbe%26rsquo%3Bs%20diffraction%20resolution%20limit

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Le microscope est depuis longtemps utilisé pour observer le monde vivant à petite échelle. [...] en dessous de 250 nanomètres (un quart de micron), les objets ne sont plus que des taches, car la lumière renvoyée par chaque point de l'objet ne peut être distinguée de celle du voisin, elles se confondent en s'élargissant. C'est la limite de diffraction d’Abbe, posée par Ernst Abbe en 1873.  4, record 4, French, - limite%20de%20diffraction%20d%27Abbe

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A figure allocated to a... flash, representing the product of lens aperture and light-to-subject distance required for correct exposure under average conditions using a specified photographic material.  2, record 5, English, - guide%20number

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Numéro indiquant l'intensité de la lumière transmise par un flash.  2, record 5, French, - nombre%2Dguide

Record number: 5, Textual support number: 1 OBS

À moins d'indication contraire, il est calculé à partir d'une base ISO 100.  3, record 5, French, - nombre%2Dguide

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 OBS

Microscope objectives use the principle of aplanatic refraction and to reduce the refraction at the front lens of the objective for higher powers, cedar wood oil(refractive index 1. 517) is placed between the cover glass(index 5. 1, say) and the plane surface of the front lens of higher index... Besides aiding aplanatism the numerical aperture is increased by this process, which therefore increases resolving power.  2, record 6, English, - immersion%20objective

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Objectif d'un microscope conçu pour être utilisé avec une goutte d'un liquide réfringent entre l'objet et la face d'entrée de l'objectif.  2, record 6, French, - objectif%20%C3%A0%20immersion

Record 6,  Textual support,  Spanish

Record number: 6, Textual support number: 1 CONT

[El] oscurecimiento de la imagen puede evitarse, en parte, empleando para los aumentos muy grandes objetivos de inmersión, con los cuales se suprime la capa de aire entre la lente frontal y el objeto o el cubreobjeto interponiendo entre ambos una gotita de líquido (aceite de cedro, por ejemplo) de elevado índice de refracción. Así se evita la pérdida de los rayos de luz desviados por el aire fuera del objetivo.  1, record 6, Spanish, - objetivo%20de%20inmersi%C3%B3n

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 OBS

This ring is a part of the lens, and is used to set the right aperture.  2, record 7, English, - aperture%20control%20ring

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Bague faisant partie de l'objectif, et servant à régler l'ouverture du diaphragme.  2, record 7, French, - bague%20de%20diaphragme

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

A camera that records information from all possible view points within the lens aperture.  3, record 8, English, - plenoptic%20camera

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 CONT

[...] un appareil photo plénoptique, commercialisé pour la première fois à un tarif raisonnable. L'intérêt? La possibilité de faire la mise au point sur l'ordinateur, bien après la prise de vue.  1, record 8, French, - appareil%20photo%20pl%C3%A9noptique

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

An instrument for examining the curvature of the cornea, consisting of a pattern of alternately black and white concentric rings seen reflected on the cornea through a convex lens mounted in a aperture at the center of the pattern.  1, record 9, English, - keratoscope

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 DEF

Disque destiné à l'examen de la cornée.  2, record 9, French, - k%C3%A9ratoscope

Record 9,  Textual support,  Spanish

Record number: 9, Textual support number: 1 DEF

Instrumento marcado con líneas o círculos para observar el reflejo corneal.  2, record 9, Spanish, - queratoscopio

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

The bandwidth of a parallel-plate lens can be increased by a method of compounding lenses into a doublet. We can make a lens by using a uniform waveguide length between the input and output surfaces and placing a phase shifter in each line to compensate for the optical path-length differences and produce an eikonal at the aperture plane.  2, record 10, English, - parallel%2Dplate%20lens

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 DEF

A graduated surface found on a camera ring on which diaphragm f/numbers are inscribed.  3, record 11, English, - diaphragm%20scale

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

Surface graduée d'une bague d'appareil-photo sur laquelle sont gravés les nombres d'ouverture du diaphragme.  3, record 11, French, - %C3%A9chelle%20de%20diaphragme

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 CONT

lens diaphragm coupling : Built-in meter coupling lever for Nikkor lenses capable of automatic maximum aperture indexing with maximum apertures of from f/1. 2 to f/5. 6; meter/diaphragm coupling of from f/1. 2 to f/32 provided.  2, record 12, English, - diaphragm%20coupling

Record 12,  Textual support,  French

Record 12,  Textual support,  Spanish

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 DEF

A fully automatic flash that works only with specific cameras.  1, record 13, English, - dedicated%20flash

Record number: 13, Textual support number: 1 CONT

Dedicated flash units automatically set the proper flash synchronization speed and lens aperture, and electronic sensors within the camera automatically control exposure by regulating the amount of light from the flash.  2, record 13, English, - dedicated%20flash

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 DEF

Flash automatique conçu pour fonctionner avec certaines marques d'appareils photo.  2, record 13, French, - flash%20d%C3%A9di%C3%A9

Record number: 13, Textual support number: 1 CONT

Le flash dédié permet de sélectionner automatiquement la vitesse de synchronisation flash appropriée et l'ouverture de l'objectif tout en contrôlant automatiquement l'exposition grâce à des capteurs intégrés dans l'appareil photo qui règlent la quantité de lumière émise par le flash.  2, record 13, French, - flash%20d%C3%A9di%C3%A9

Record number: 13, Textual support number: 1 OBS

Pluriel : des flashs ou des flashes.  3, record 13, French, - flash%20d%C3%A9di%C3%A9

Record number: 13, Textual support number: 2 OBS

flashs (pl.) : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004).  4, record 13, French, - flash%20d%C3%A9di%C3%A9

Record 13,  Textual support,  Spanish

Record 14,  Textual support,  English

Record number: 14, Textual support number: 1 OBS

Aperture : Opening of a lens which controls the amount of light that passes to the photographic material, measured in "f" [focal] numbers.  4, record 14, English, - lens%20aperture

Record 14,  Textual support,  French

Record number: 14, Textual support number: 1 DEF

Ouverture formée par l'iris du diaphragme à l'intérieur de la lentille.  1, record 14, French, - ouverture%20de%20diaphragme

Record number: 14, Textual support number: 1 OBS

Cette ouverture peut être agrandie ou rapetissée par le biais d'un système autofocus ou par contrôle manuel.  1, record 14, French, - ouverture%20de%20diaphragme

Record 14,  Textual support,  Spanish

Record 15,  Textual support,  English

Record number: 15, Textual support number: 1 DEF

Reading the light metering through the camera lens with the aperture set at the position that it’ll be at when the photo is taken.  4, record 15, English, - stopped%20down%20metering

Record number: 15, Textual support number: 1 CONT

Fortunately, you can still meter using the stopped-down metering approach on most cameras. By pressing a depth-of-field button, the camera is placed into stopped-down metering mode too. The lens is stopped down to the taking aperture automatically on some adapters. On T-mount and other purely mechanical mounts, you may have to turn the aperture ring to the desired taking aperture. In either case, the camera is now metering at the actual stopped down aperture. You can set the shutter speed and aperture as desired, based on your meter reading.  2, record 15, English, - stopped%20down%20metering

Record 15,  Textual support,  French

Record number: 15, Textual support number: 1 OBS

[...] si, face à une source lumineuse, on applique à l'arrière de l'objectif un verre dépoli, il se forme sur ce dernier un cercle lumineux dont le diamètre est l'ouverture utile dite aussi ouverture mécanique.  2, record 15, French, - mesure%20ouverture%20utile

Record 15,  Textual support,  Spanish

Record 16,  Textual support,  English

Record number: 16, Textual support number: 1 CONT

The relative aperture given by a particular lens stop is called the f/number, and its value is expressed by the letter "f" followed by a figure-e. g., f/4. 5, which indicates that the focal length of the lens is 4. 5 times larger than the effective diameter of the stop.  1, record 16, English, - f%2Fnumber

Record number: 16, Textual support number: 1 OBS

f/number: term standardized by the Canadian General Standards Board (CGSB).  5, record 16, English, - f%2Fnumber

Record 16,  Textual support,  French

Record number: 16, Textual support number: 1 DEF

[...] ouverture relative d'un objectif particulier.  2, record 16, French, - nombre%20d%27ouverture

Record number: 16, Textual support number: 1 OBS

Ainsi [pour f:5.6] la distance focale de l'objectif est 5.6 fois plus grande que le diamètre du diaphragme.  2, record 16, French, - nombre%20d%27ouverture

Record 16,  Textual support,  Spanish

Record 17,  Textual support,  English

Record number: 17, Textual support number: 1 DEF

A lens with a small maximum aperture, such as f/8.  1, record 17, English, - slow%20lens

Record 17,  Textual support,  French

Record number: 17, Textual support number: 1 DEF

Lentille comportant une faible ouverture maximale, telle que f/8.  2, record 17, French, - objectif%20peu%20lumineux

Record 17,  Textual support,  Spanish

Record 18,  Textual support,  English

Record number: 18, Textual support number: 1 DEF

The largest lens opening [smallest f-number] at which a lens can be set.  2, record 18, English, - lens%20speed

Record number: 18, Textual support number: 1 CONT

Lens speed is determined by the maximum aperture of the lens(the largest lens opening or the smallest f-number) in relation to it's focal length. The "speed" of a lens is relative, a 400 mm lens with a maximum aperture of f/3. 5 is considered extremely fast, while a 28mm f/3. 5 lens is thought to be relatively slow.  3, record 18, English, - lens%20speed

Record number: 18, Textual support number: 1 OBS

A "fast" lens transmits more light and has a larger opening than a "slow" lens.  2, record 18, English, - lens%20speed

Record 18,  Textual support,  French

Record number: 18, Textual support number: 1 DEF

La plus grande ouverture [...] sur laquelle on peut régler l'objectif grâce au diaphragme.  1, record 18, French, - clart%C3%A9%20d%27un%20objectif

Record number: 18, Textual support number: 1 OBS

Un objectif «clair» transmet plus de lumière et a une ouverture plus grande qu'un objectif de petite ouverture.  1, record 18, French, - clart%C3%A9%20d%27un%20objectif

Record number: 18, Textual support number: 2 OBS

Caractéristiques d'un objectif. [...] Sa luminosité. C'est sa capacité à absorber et restituer la luminosité de votre scène. La luminosité ou ouverture se caractérise par le sigle «f» et un chiffre, plus le chiffre est petit (ex : 1.4 ou 1.8) plus votre objectif est lumineux. Plus un objectif est lumineux plus il autorise des vitesses élevées, une profondeur de champs restreinte donc de très jolis flous et plus son prix augmente.  2, record 18, French, - clart%C3%A9%20d%27un%20objectif

Record 18,  Textual support,  Spanish

Record 19,  Textual support,  English

Record number: 19, Textual support number: 1 DEF

The zone in which the depth of field of a given lens and aperture show details(shallow or deep) in a shot.  2, record 19, English, - field%20of%20sharpness

Record number: 19, Textual support number: 1 CONT

A few elements that will affect depth of field in a picture: ... the focal length of the lens (the wide angle lenses have extended field of sharpness than a longer focal length lenses and vice versa) ...  1, record 19, English, - field%20of%20sharpness

Record 19,  Textual support,  French

Record number: 19, Textual support number: 1 DEF

Zone d'une image dans laquelle sont représentés les détails occasionnés par la profondeur de champ et dont la netteté varie selon l'objectif et l'ouverture utilisés.  2, record 19, French, - champ%20de%20nettet%C3%A9

Record number: 19, Textual support number: 1 CONT

L'ouverture du diaphragme est déterminée par la profondeur de champ désirée; plus le diaphragme sera fermé, plus grand sera le champ fournissant des images nettes. La profondeur de champ net dépend aussi de l'objectif utilisé : plus l'objectif est court, plus le champ de netteté est grand; le téléobjectif réduisant cette profondeur de champ implique donc un réglage soigné.  3, record 19, French, - champ%20de%20nettet%C3%A9

Record 19,  Textual support,  Spanish

Record 20,  Textual support,  English

Record number: 20, Textual support number: 1 DEF

A lens with a wide maximum aperture.  2, record 20, English, - fast%20lens

Record number: 20, Textual support number: 1 CONT

A fast lens transmits more light and has a larger opening than a slow lens.  3, record 20, English, - fast%20lens

Record 20,  Textual support,  French

Record number: 20, Textual support number: 1 DEF

Lentille possédant une grande ouverture qui permet ainsi de faire pénétrer un maximum de lumière.  2, record 20, French, - objectif%20lumineux

Record 20,  Textual support,  Spanish

Record 21,  Textual support,  English

Record number: 21, Textual support number: 1 DEF

A circuit fitted to the lens iris which allows the aperture of the lens to automatically adjust to varying light levels, providing a constant picture.  4, record 21, English, - automatic%20iris

Record 21,  Textual support,  French

Record number: 21, Textual support number: 1 DEF

Contrôle automatique qui asservit l'ouverture du diaphragme de la caméra à l'amplitude du signal vidéo analysé.  1, record 21, French, - auto%2Diris

Record 21,  Textual support,  Spanish

Record 22,  Textual support,  English

Record number: 22, Textual support number: 1 DEF

[The amplification of] the electrical signal created by the [camcorder] image-forming chip.  1, record 22, English, - electronic%20gain

Record number: 22, Textual support number: 1 CONT

At very low light levels, the chip may not receive enough information to form an adequate image, even with the lens aperture wide open. In this situation, the electronic gain circuitry amplifies the electrical image signal strengthen it and thereby improve the picture.  1, record 22, English, - electronic%20gain

Record 22,  Textual support,  French

Record number: 22, Textual support number: 1 DEF

Amplification du signal électrique généré par le circuit de formation des images d'un caméscope.  2, record 22, French, - gain%20%C3%A9lectronique

Record 22,  Textual support,  Spanish

Record 23,  Textual support,  English

Record number: 23, Textual support number: 1 DEF

A laser scanning microscopy system that focuses on a single plane of light through a biological substance, allowing high-resolution, three-dimensional images to be built up.  4, record 23, English, - confocal%20laser%20scanning%20microscopy

Record number: 23, Textual support number: 1 CONT

Laser Scanning Confocal Microscopy(LSCM, also referred to as CSLM, Confocal Scanning Laser Microscopy) is now established as a valuable tool for obtaining high resolution images and 3-D reconstructions of a variety of biological specimens. In LSCM, a laser light beam is expanded to make optimal use of the optics in the objective. Through a x-y deflection mechanism this beam is turned into a scanning beam, focussed to a small spot by an objective lens onto a fluorescent specimen. The mixture of reflected light and emitted fluorescent light is captured by the same objective and(after conversion into a static beam by the x-y scanner device) is focused onto a photodetector(photomultiplier) via a dichroic mirror(beam splitter). The reflected light is deviated by the dichroic mirror while the emitted fluorescent light passes through in the direction of the photomultiplier. A confocal aperture(pinhole) is placed in front of the photodetector, such that the fluorescent light(not the reflected light!) from points on the specimen that are not within the focal plane(the so called out-of-focus light) where the laser beam was focussed will be largly obstructed by the pinhole. In this way, out-of-focus information(both above and below the focal plane) is greatly reduced.  2, record 23, English, - confocal%20laser%20scanning%20microscopy

Record 23,  Textual support,  French

Record number: 23, Textual support number: 1 CONT

Principe de la microscopie confocale à balayage laser (MCBL). Le rayon laser excitateur pénètre dans l'échantillon préalablement marqué par des fluorochromes [...], auparavant répertoriés et choisis en fonction de leurs propriétés à se fixer sur des molécules particulières d'une structure ou d'un objet d'intérêt. Lors de l'impact optique, il y a émission de rayons lumineux provenant de différents plans de la préparation. Grâce à un diaphragme variable («trou d'aiguille» - pinhole), il est possible de sélectionner les rayons émis par un seul plan de préparation et d'éliminer le signal provenant d'autres plans. Les rayons réfléchis sont filtrés en fonction de leur longueurs d'onde puis détectés par des photo-multiplicateurs. Le signal reçu est enfin converti en signal numérique, contribuant à la création d'une image [...]  2, record 23, French, - microscopie%20confocale%20%C3%A0%20balayage%20laser

Record number: 23, Textual support number: 1 OBS

Tous les champs d'application de la microscopie confocale à balayage laser : localisations intracellulaires par fluorescence (simple et double marquage), reconstitution 3D par fluorescence de structures cellulaires, hybridation in situ, cinétique de processus dans les cellules vivantes, états de surface de matériaux divers.  3, record 23, French, - microscopie%20confocale%20%C3%A0%20balayage%20laser

Record 23,  Textual support,  Spanish

Record 24,  Textual support,  English

Record number: 24, Textual support number: 1 CONT

The maximum lens aperture is important because it indicates the largest amount of light that the lens will transmit.  2, record 24, English, - maximum%20lens%20opening

Record 24,  Textual support,  French

Record number: 24, Textual support number: 1 DEF

La plus grande ouverture possible [...] formée par l'iris du diaphragme [d'un appareil photo].  1, record 24, French, - ouverture%20maximale%20du%20diaphragme

Record 24,  Textual support,  Spanish

Record 25,  Textual support,  English

Record number: 25, Textual support number: 1 OBS

The helical aperture facsimile transmitter is fairly common on low-to mid-volume fax units. The original is roller fed over a flatbed copy platen and illuminated by an area lamp. Lens and mirror optics reflect and focus one scan line of the moving document at a time, first through a fixed horizontal slit aperture, and then through a rotating helical aperture. The rotating of the helical aperture produces one lateral scan of the original per revolution, with the passing light being focused a final time onto a photocell for conversion to an electrical signal.  1, record 25, English, - rotating%20helical%20aperture%20scanner

Record 25,  Textual support,  French

Record 25,  Textual support,  Spanish

Record 26,  Textual support,  English

Record number: 26, Textual support number: 1 DEF

A facsimile transmitter using a scan head composed of a stationary mirror surrounded by a rotating turret of lenses. The original is mounted on a moving semicylindrical platen that feeds the document as it is scanned one line at a time. While rotating, each lens focuses scan lines onto the mirror, which in turn projects the light through an aperture and onto a photocell.  1, record 26, English, - rotating%20lens%20turret%20scanner

Record 26,  Textual support,  French

Record 26,  Textual support,  Spanish

Record 27,  Textual support,  English

Record number: 27, Textual support number: 1 DEF

A procedure used to reduce the field of view of a [flame] detector by means of an opaque plate or card with a selected sized opening. This is frequently required to reduce refractory interference to acceptable levels.  2, record 27, English, - orificing

Record number: 27, Textual support number: 1 CONT

The S512 with its PbS photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action(compression). However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing(placing disk with small aperture in front of lens to reduce the amount of light or radiation).  3, record 27, English, - orificing

Record 27,  Textual support,  French

Record number: 27, Textual support number: 1 DEF

Action d'occulter (une source lumineuse); [...]  1, record 27, French, - occultation

Record 27,  Textual support,  Spanish

Record 28,  Textual support,  English

Record number: 28, Textual support number: 1 DEF

The point at which an increased input signal no longer increases the amplifier output.  3, record 28, English, - amplifier%20saturation

Record number: 28, Textual support number: 1 CONT

The S512 with its PbS [lead sulfide] photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action(compression), However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing(placing disk with small aperture in front of lens to reduce the amount of light or radiation).  4, record 28, English, - amplifier%20saturation

Record number: 28, Textual support number: 1 OBS

flame signal amplifier: the part of the flame detection system which increases the flame signal to a magnitude sufficient to pull in the flame relay in the flame safeguard control.  3, record 28, English, - amplifier%20saturation

Record 28,  Textual support,  French

Record number: 28, Textual support number: 1 CONT

Le convertisseur à résistance négative, étudié en préliminaire, est utilisé pour compenser les pertes d'un circuit LC, en particulier celles de l'inductance. On enregistre alors la «naissance» de l'oscillation qui permet de mettre en évidence la partie à croissance exponentielle et la stabilisation de l'amplitude due à la saturation de l'amplificateur.  2, record 28, French, - saturation%20de%20l%27amplificateur

Record 28,  Textual support,  Spanish

Record 29,  Textual support,  English

Record number: 29, Textual support number: 1 DEF

The ratio of the focal length of a lens to the diameter of the effective aperture-the so called f number.  2, record 29, English, - relative%20aperture

Record 29,  Textual support,  French

Record number: 29, Textual support number: 1 DEF

Diamètre utile d'un objectif ou d'une lentille par lequel passe la lumière.  2, record 29, French, - ouverture%20relative

Record number: 29, Textual support number: 1 OBS

On le calcule en déterminant le rapport entre le diamètre du diaphragme et la longueur focale de l'objectif.  2, record 29, French, - ouverture%20relative

Record 29,  Textual support,  Spanish

Record 30,  Textual support,  English

Record number: 30, Textual support number: 1 DEF

... the light beam reaching the lens from a distant object point along its axis, which passes through the edge of the limiting aperture.  3, record 30, English, - effective%20aperture

Record 30,  Textual support,  French

Record number: 30, Textual support number: 1 DEF

Nombre que l'on obtient en multipliant l'ouverture relative f/ par le rapport de l'image : distance/longueur focale; cette ouverture effective s'utilise en photomacrographie, en particulier pour trouver la distance flash-sujet.  1, record 30, French, - ouverture%20effective

Record 30,  Textual support,  Spanish

Record 31,  Textual support,  English

Record number: 31, Textual support number: 1 DEF

Within a camera, the range of distances from the lens to the photo-sensitive surface within which the image is acceptably sharply defined for a given circle of confusion.  2, record 31, English, - depth%20of%20focus

Record number: 31, Textual support number: 1 OBS

The depth of focus depends on the diameter of the circle of confusion, on the lens aperture, and on the distance between the lens and the image.  3, record 31, English, - depth%20of%20focus

Record 31,  Textual support,  French

Record number: 31, Textual support number: 1 DEF

Dans la caméra de télévision, distance entre la lentille et la plaque mosaïque qui définit l'aire de netteté de l'image.  2, record 31, French, - profondeur%20de%20foyer

Record number: 31, Textual support number: 1 OBS

La profondeur de foyer représente la quantité dont on peut, sans nuire à la netteté, avancer ou reculer (l'objectif étant mis au point) le plan de la surface sensible.  3, record 31, French, - profondeur%20de%20foyer

Record 31,  Textual support,  Spanish

Record 32,  Textual support,  English

Record 32,  Textual support,  French

Record number: 32, Textual support number: 1 DEF

Partie d'un verre lenticulaire support de la correction.  1, record 32, French, - ouverture%20d%27un%20verre%20lenticulaire

Record number: 32, Textual support number: 1 OBS

Source MVISI-F : Le nouveau dictionnaire de la vision par Michel Millodot, Médiacom Vision Éditeur, 1997.  2, record 32, French, - ouverture%20d%27un%20verre%20lenticulaire

Record 32,  Textual support,  Spanish

Record 33,  Textual support,  English

Record number: 33, Textual support number: 1 CONT

Posterior chamber IOL [intraocular lens] malpositions are labelled descriptively by their appearance ... [A] haptic loop asymmetry, where the optic is deviated laterally, is descriptively classified as an ’east-west syndrome’.  2, record 33, English, - east%2Dwest%20syndrome

Record number: 33, Textual support number: 2 CONT

East-west syndrome. Caused when an intraocular lens is placed so that the edge of the optic, a positioning hole and the components of the loop-optic junction are well within the pupillary aperture.  3, record 33, English, - east%2Dwest%20syndrome

Record 33,  Textual support,  French

Record number: 33, Textual support number: 1 OBS

voir les fiches «sunset syndrome» et «sunrise syndrome»  1, record 33, French, - syndrome%20est%2Douest

Record 33,  Textual support,  Spanish

Record 34,  Textual support,  English

Record number: 34, Textual support number: 1 DEF

System of movable overlapping metal or plastic leaves inside, behind, or in front of a lens which maintain a circular aperture of adjustable diameter. Adjusting this aperture controls the amount of light passing through the lens. So called by analogy with the eye.  2, record 34, English, - iris%20diaphragm

Record number: 34, Textual support number: 1 OBS

The various settings of the diaphragm are usually calibrated in relative apertures or f-numbers and are called stops.  2, record 34, English, - iris%20diaphragm

Record 34,  Textual support,  French

Record number: 34, Textual support number: 1 DEF

[Photographie] Diaphragme formé d'un ensemble de lamelles mobiles délimitant une ouverture approximativement circulaire dont le diamètre peut être ajusté de façon continue.  4, record 34, French, - diaphragme%20%C3%A0%20iris

Record 34,  Textual support,  Spanish

Record 35,  Textual support,  English

Record number: 35, Textual support number: 1 OBS

Tiny aperture or opening within a sheet of gold foil, which is placed in the objective lens to serve as a diaphragm in a transmission electron microscope. Source : Electron Microscope Centre, Agriculture Canada.  2, record 35, English, - goldfoil%20aperture

Record 35,  Textual support,  French

Record number: 35, Textual support number: 1 OBS

Les microscopes usuels possèdent le plus souvent dans l'objectif un porte-diaphragme muni de trois diaphragmes qui peuvent être introduits et centrés séparément (...). [On utilise] de plus en plus souvent des diaphragmes dits "autonettoyants" à feuille métallique très mince; ces derniers sont généralement constitués d'or (...).  2, record 35, French, - diaphragme%20%C3%A0%20feuille%20d%27or

Record 35,  Textual support,  Spanish

Record 36,  Textual support,  English

Record number: 36, Textual support number: 1 CONT

the lenses are mounted in clusters of 3 or 4 on a turret, a revolving device which serves to bring the wanted lens in front of the aperture.  1, record 36, English, - turret

Record 36,  Textual support,  French

Record number: 36, Textual support number: 1 CONT

ces différentes lentilles sont fixées à l'intérieur d'une monture tubulaire en cuivre; on trouve sur cette monture un système de fixation devant la fenêtre de la caméra.  1, record 36, French, - monture

Record 36,  Textual support,  Spanish

Record 37,  Textual support,  English

Record number: 37, Textual support number: 1 DEF

The lens aperture at which the magnitude of image unsharpness due to diffraction most nearly balances the unsharpness due to such aberrations as the lens displays. The lens gives its optimum overall performance at this critical aperture, which is also called the optimum aperture.  2, record 37, English, - critical%20aperture

Record 37,  Textual support,  French

Record 37,  Textual support,  Spanish

Record 38,  Textual support,  English

Record number: 38, Textual support number: 1 OBS

Camera setting of shutter speed and lens aperture that controls film exposure.  1, record 38, English, - exposure

Record 38,  Textual support,  French

Record number: 38, Textual support number: 1 OBS

Combinaison de vitesse et d'ouverture relative déterminant l'exposition appropriée du film utilisé.  1, record 38, French, - r%C3%A9glage

Record 38,  Textual support,  Spanish

Record 39,  Textual support,  English

Record number: 39, Textual support number: 1 CONT

Stereozoom Microscopes. Mention was made earlier that the zoom concept is particularly well suited to stereomicroscope applications. This is due to the fact that the upper useful magnification range of numerical aperture objectives.(...) The two zoom lenses in Fig. 3A are cam driven in the conventional fashion and the first zoom lens is designed to vary the effective numerical aperture in much the same way as described for the compound microscope in Fig. 1B.  2, record 39, English, - stereozoom%20microscope

Record 39,  Textual support,  French

Record number: 39, Textual support number: 1 CONT

Le microscope stéréoscopique à zoom est un perfectionnement récent [du microscope stéréoscopique] qui permet de faire varier le grossissement dans certaines limites. Beaucoup de microscopes stéréoscopiques modernes ont une application précise, comme l'assemblage répétitif, et ont un grossissement unique.  1, record 39, French, - microscope%20st%C3%A9r%C3%A9oscopique%20%C3%A0%20zoom

Record 39,  Textual support,  Spanish

Record 40,  Textual support,  English

Record number: 40, Textual support number: 1 DEF

Cameras with no focusing movement e. g. 1. Cheap snapshot cameras with a small aperture lens set at the hyperfocal distance to give acceptably sharp pictures from approximately 8 feet to infinity. 2. Simple-to-operate cameras sometimes with a built in light source designed for specific technical record purposes.  1, record 40, English, - fixed%20focus%20camera

Record 40,  Textual support,  French

Record number: 40, Textual support number: 1 CONT

(...) certains appareils ou certains objectifs ne possèdent pas de mise au point (...); ce sont les appareils dits "à mise au point fixe".  3, record 40, French, - appareil%20%C3%A0%20mise%20au%20point%20fixe

Record number: 40, Textual support number: 2 CONT

C'est sur l'hyperfocale que sont réglés les appareils à mise au point fixe.  4, record 40, French, - appareil%20%C3%A0%20mise%20au%20point%20fixe

Record 40,  Textual support,  Spanish

Record 41,  Textual support,  English

Record number: 41, Textual support number: 1 OBS

To reduce the aperture of a photographic lens to increase the depth of focus and depth of field, or to control exposure.  1, record 41, English, - stop%20down

Record 41,  Textual support,  French

Record number: 41, Textual support number: 1 OBS

Diminuer l'ouverture d'un diaphragme d'objectif pour augmenter la profondeur de champ ou de foyer ou pour régler l'exposition.  1, record 41, French, - diaphragmer

Record 41,  Textual support,  Spanish

Record 42,  Textual support,  English

Record number: 42, Textual support number: 1 OBS

As the prime lens of any camera system the normal lens is likely to have the most sophisticated means of correcting aberrations, and so offer the widest maximum aperture of the range(...). A scene photographed with a normal lens(...) closely re-creates the appearance of original size and correct distance between objects(...)  1, record 42, English, - normal%20lens

Record 42,  Textual support,  French

Record number: 42, Textual support number: 1 OBS

Les objectifs normaux - Les objectifs les plus employés sont calculés pour couvrir une surface dont la diagonale est au moins égale à la longueur focale. Ce sont les objectifs normaux, leur angle de champ est de l'ordre de 50 ° et correspond à notre champ de vision. Les objectifs montés à demeure sur les appareils sont des objectifs normaux.  1, record 42, French, - objectif%20normal

Record 42,  Textual support,  Spanish

Record 43,  Textual support,  English

Record number: 43, Textual support number: 1 OBS

--largest aperture at which a lens will give a satisfactory negative, as opposed to the largest aperture to which the diaphragm can be opened.  1, record 43, English, - working%20aperture

Record 43,  Textual support,  French

Record number: 43, Textual support number: 1 OBS

si, face à une source lumineuse, on applique à l'arrière de l'objectif un verre dépoli, il se forme sur ce dernier un cercle lumineux dont le diamètre est l'-- (...) dite aussi ouverture mécanique.  1, record 43, French, - ouverture%20utile

Record 43,  Textual support,  Spanish

Record 44,  Textual support,  English

Record number: 44, Textual support number: 1 OBS

means that the lens aperture adjust automatically to the existing light and signals in the viewfinder if the light is inadequate.  1, record 44, English, - electric%20eye%20camera

Record 44,  Textual support,  French

Record 44,  Textual support,  Spanish

Record 45,  Textual support,  English

Record number: 45, Textual support number: 1 DEF

This is the diameter of the light beam reaching the lens from a distant object point along its axis, which passes through the edge of the limiting aperture.  1, record 45, English, - effective%20aperture

Record 45,  Textual support,  French

Record number: 45, Textual support number: 1 CONT

L'ouverture relative de l'objectif est le rapport géométrique existant entre la distance focale et le diamètre du faisceau lumineux parallèle à l'axe optique qui passe par le diaphragme (ou diamètre utile du diaphragme).  1, record 45, French, - diam%C3%A8tre%20utile%20du%20diaphragme

Record 45,  Textual support,  Spanish