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RETRODIFFUSION LASER [2 records]
Record 1 - internal organization data 2007-01-31
Record 1, English
Record 1, Subject field(s)
- Optics
- Lasers and Masers
- Remote Sensing
Record 1, Main entry term, English
- laser backscatter
1, record 1, English, laser%20backscatter
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record 1, French
Record 1, Domaine(s)
- Optique
- Masers et lasers
- Télédétection
Record 1, Main entry term, French
- rétrodiffusion par laser
1, record 1, French, r%C3%A9trodiffusion%20par%20laser
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Rétrodiffusion lumineuse produite par une surface lorsque’elle est éclairée par un dispositif laser. 2, record 1, French, - r%C3%A9trodiffusion%20par%20laser
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Óptica
- Láser y máser
- Teledetección
Record 1, Main entry term, Spanish
- retrodifusión láser
1, record 1, Spanish, retrodifusi%C3%B3n%20l%C3%A1ser
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2002-04-17
Record 2, English
Record 2, Subject field(s)
- Photoelectricity and Electron Optics
- Electromagnetic Radiation
- Lasers and Masers
Record 2, Main entry term, English
- backscatter
1, record 2, English, backscatter
correct, noun
Record 2, Abbreviations, English
Record 2, Synonyms, English
- back-scattering 2, record 2, English, back%2Dscattering
correct
- backscattering 3, record 2, English, backscattering
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Lock-in is a fundamental physical phenomenon associated with all oscillating devices. Laser gyros exhibit the same phenomenon, in that the coupling mechanism is the reflection of light from one laser beam back along the path where it interacts with the oppositely traveling beam. This is called backscatter and is caused primarily by imperfect mirrors. 4, record 2, English, - backscatter
Record 2, Key term(s)
- back-scatter
Record 2, French
Record 2, Domaine(s)
- Photo-électricité et optique électronique
- Rayonnements électromagnétiques
- Masers et lasers
Record 2, Main entry term, French
- rétrodiffusion
1, record 2, French, r%C3%A9trodiffusion
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
L'origine physique de ce blocage(lock-in) des oscillations [gyromètre laser] tient à ce qu'une partie de chacun des rayonnements se déplaçant dans un sens donné est renvoyée dans l'autre sens; ce renvoi est notamment dû aux irrégularités de surface des miroirs et aux variations d’indice de ces miroirs. Ce phénomène est représenté par le terme générique de rétrodiffusion(back-scattering). 2, record 2, French, - r%C3%A9trodiffusion
Record number: 2, Textual support number: 2 CONT
La structure simple du gyrolaser lui confère une excellente fiabilité et une bonne précision [...] Les défauts de surface des miroirs, même infimes, provoquent la rétrodiffusion d’une partie de chaque rayon qui se couple alors avec le rayon se propageant dans l’autre sens. Il se crée ainsi un couplage (lock-in) entre les faisceaux lasers et une zone aveugle pour les vitesses angulaires faibles. 3, record 2, French, - r%C3%A9trodiffusion
Record 2, Spanish
Record 2, Textual support, Spanish
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