TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

Temporal Paul wavelet analysis for instantaneous phase extraction using shadow moiré technique is proposed. Unlike the Morlet wavelet, the Paul wavelet has less restriction on the adjustment of wavelet parameters and can provide an optimal time and frequency resolution for a particular application by selecting the proper parameters. The Paul wavelet is a complex wavelet and is suitable for processing the temporal intensity data obtained from the shadow moiré technique for the phase retrieval. The proposed method can extract the phase information related to the state of the dynamic object at every instant in temporal domain. The phase information is associated to the displacement, three-dimensional (3D) surface-profile and the instantaneous state of the dynamic object. In addition, the instantaneous frequency of vibrating object can be obtained using the scale of the wavelet ridge by direct integration without temporal and spatial phase unwrapping. Thus the phase unwrapping error can be avoided. An experiment is conducted on the central loaded beam to demonstrate the validity of the proposed technique.  3, fiche 1, Anglais, - shadow%20moir%C3%A9%20technique

Record number: 1, Textual support number: 1 OBS

The term “moiré” is... a French word referring to “an irregular wavy finish usually produced on a fabric by pressing between engraved rollers”(Webster's 1981). In optics it refers to a beat pattern produced between two gratings of approximately equal spacing. It can be seen in everyday things such as the overlapping of two window screens, the rescreening of a half-tone picture, or with a striped shirt seen on television. The use of moiré for reduced sensitivity testing was introduced by Lord Rayleigh in 1874. Lord Rayleigh looked at the moiré between two identical gratings to determine their quality even though each individual grating could not be resolved under a microscope.... Since Lord Rayleigh first noticed the phenomena of moiré fringes, moiré techniques have been used for a number of testing applications. Righi(1887) first noticed that the relative displacement of two gratings could be determined by observing the movement of the moiré fringes. The next significant advance in the use of moiré was presented by Weller and Shepherd(1948). They used moiré to measure the deformation of an object under applied stress by looking at the differences in a grating pattern before and after the applied stress. They were the first to use shadow moiré, where a grating is placed in front of a nonflat surface to determine the shape of the object behind it by using the shape of the moiré fringes.  4, fiche 1, Anglais, - shadow%20moir%C3%A9%20technique

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Le moiré d’ombre. Cette technique […] consiste à créer un moiré entre une grille de référence placée juste devant l’objet, et l’ombre de cette même grille projetée sur la surface étudiée. Les déformations de cette surface modifient le pas du réseau «ombre» créant ainsi le moiré. Une mesure du pas de ce moiré permet, à l’aide des équations précédentes, de remont3er aux déformations locales et de dresser la carte des hauteurs.  5, fiche 1, Français, - technique%20du%20moir%C3%A9%20d%27ombre

Record number: 1, Textual support number: 2 CONT

Le moiré d’ombre. Il s’agit d’un dérivé (conceptuellement, pas historiquement) de la mesure de forme par projection de frange.  6, fiche 1, Français, - technique%20du%20moir%C3%A9%20d%27ombre

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

... photograph made without a camera by positioning objects between a light source and photographic film paper. The resulting image consists of shapes, forms, and tones, that vary widely depending on the types of objects and how they are used.  3, fiche 2, Anglais, - photogram

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Image photographique obtenue sans utiliser d'appareil. On place simplement des objets d'opacité variable sur une feuille photosensible et l'on expose le tout à une source lumineuse déterminée, lampe d'agrandissement, par exemple.  3, fiche 2, Français, - photogramme

Fiche 2,  Justifications,  Espagnol

Record number: 2, Textual support number: 1 DEF

Imagen fotográfica que se obtiene sin cámara, disponiendo directamente sobre la emulsión sensible objetos transparentes u opacos [...] y exponiendo el conjunto a la luz.  1, fiche 2, Espagnol, - fotograma

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 DEF

[An oven-exposed] print from a negative in which shadow details of the picture merge.  1, fiche 3, Anglais, - dark%20print

Fiche 3,  Justifications,  Français

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 CONT

Toshiba's response is the Flat Super Brightron, which the company is calling the world's first flat-faced shadow-mask picture tube.... Toshiba based the approach on its Micro-filtertechnology, developed in 1995, which uses a cylindrical shadow mask. The technology, which combines an RGB(Red-Green-Blue) filter with clear glass, provides a 77 percent transmissive ratio, compared with 44 percent for conventional color tubes. The resultant picture contrast is therefore higher, according to Toshiba.  1, fiche 4, Anglais, - shadow%2Dmask%20picture%20tube

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

Tube image doté d'un masque criblé de perforations que l'on place entre l'écran et trois canons électroniques qui ont pour fonction de diriger les faisceaux lumineux sur les points rouges, verts et bleus de l'écran.  4, fiche 4, Français, - tube%20%C3%A9cran%20%C3%A0%20masque%20perfor%C3%A9

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 CONT

The sets also incorporate a progressive scan system which doubles the scanning lines to produce a picture with impressive depth and vivid color without flicker; a two-tuner PIP(picture in picture), Invar Shadow Mask, 3D Y/C Comb Filter, side and rear S-Video inputs and a total of three rear A/V inputs and monitor output for versatile video component connections.  1, fiche 5, Anglais, - video%20component%20connection

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 CONT

Le branchement composantes vidéo, lui, permet de transmettre le signal vidéo tel qu'il est composé, sans altération, sans manipulation, directement de la source à l'écran, sans passer par un décodeur : c'est là le secret du ColorStream. Son Signal est transmis à l'aide de trois fils, chaque couleur ayant le sien (le vert est transmis avec la luminance), ce qui donne un raccordement très clair, permettant d'obtenir une définition horizontale de 480 à 500 lignes.  1, fiche 5, Français, - branchement%20composante%20vid%C3%A9o

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

Record number: 6, Textual support number: 1 DEF

A condition in which the electron beams of a multibeam cathode-ray tube intersect at a specified point, such as at an opening in the shadow mask of a three-gun color television picture tube; both static convergence and dynamic convergence are required.  1, fiche 6, Anglais, - convergence

Fiche 6,  Justifications,  Français

Record number: 6, Textual support number: 1 DEF

Dans un tube à masque de télévision en couleurs, réglage des balayages des trois faisceaux électroniques correspondant aux trois couleurs, réalisé afin qu'ils traversent au même instant un même trou du masque, quelle que soit sa position sur la surface de l'écran.  2, fiche 6, Français, - convergence

Fiche 6,  Justifications,  Espagnol