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MIRROR SCALE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-10-18

English

Subject field(s)
  • Remote Sensing
CONT

Although the scanning mirror rotates at a constant speed, the IFOV [instantaneous field of view] of the sensor moves faster(relative to the ground) and scans a larger area as it moves closer to the edges. This effect results in the compression of image features at points away from the nadir and is called tangential scale distortion.

French

Domaine(s)
  • Télédétection
CONT

Même si le miroir permettant le balayage tourne à une vitesse constante, le CVI [champ de visée instantané] du capteur se déplace plus rapidement par rapport à la surface et capte une région plus grande lorsqu'il se déplace près des bords de l'image. Cet effet produit une compression des caractéristiques de l'image pour les points éloignés du nadir et s'appelle distorsion tangentielle d'échelle.

Spanish

Save record 1

Record 2 2004-05-12

English

Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment
DEF

Nephoscope in which the image of the clouds produced by a mirror is observed.

CONT

The mirror nephoscope consists essentially of a horizontal disk of black glass engraved with concentric circles. A vertical pointer adjustable to various known heights is mounted on the rim of the instrument. The pointer is so placed by the observer that the image of the cloud under observation is in line with the pointer and the centre of the disk. The image is kept in line with the pointer as it moves, and the direction of motion is read off from a scale on the rim of the circle. Another type of mirror nephoscope has a mirror on which the only marking is a centre point.

OBS

nephoscope: An instrument for determining the direction of cloud motion. There are two basic designs of nephoscope: the direct-vision nephoscope and the mirror nephoscope. Also called nepheloscope.

OBS

There are several types of nephoscope: the comb nephoscope developed by Besson; the mirror nephoscope developed by Finemann; and the grid nephoscope, a variation on the comb modified by the Norwegians.

OBS

In one source, the Finemann nephoscope is "a mirror nephoscope developed by Finemann". In the other source, Fineman nephoscope is an "adaptation of the mirror nephoscope". Compare Fineman nephoscope.

Key term(s)
  • mirror nepheloscope
  • reflection nepheloscope
  • reflecting nepheloscope
  • cloud nepheloscope

French

Domaine(s)
  • Stations, instruments et équipements météorologiques
DEF

Néphoscope dans lequel on observe l'image des nuages donnée par un miroir.

Spanish

Campo(s) temático(s)
  • Estaciones, instrumentos y equipos meteorológicos
DEF

Nefoscopio en que las imágenes de las nubes se reflejan sobre un espejo.

Save record 2

Record 3 2002-10-31

English

Subject field(s)
  • Audiovisual Techniques and Equipment
  • Photography
  • Architectural Drafting and Tools
DEF

A device employing a short rigid endoscope fitted with a right angle mirror at its tip, used to photograph scale models from a seemingly eye-level viewpoint.

French

Domaine(s)
  • Audiovisuel (techniques et équipement)
  • Photographie
  • Dessin architectural et instruments
DEF

Appareil destiné à observer des maquettes.

CONT

Laboratoire audiovisuel. Robert GENSBURGER. Semestre 5,6,7,8. Études des matériaux et leurs rendus en lumière. Utilisation de l'héliodon, étude de la lumière sur maquette. Les maquettoscopes, utilisations. Microcaméra. Reproduction et transferts photographiques, diapositives, vidéo.

Spanish

Campo(s) temático(s)
  • Técnicas y equipo audiovisuales
  • Fotografía
  • Diseño arquitectónico e instrumentos
Save record 3

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