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cellule au sulfure de plomb [1 record]

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Record 1 2000-04-28

English

Subject field(s)
  • Photoelectricity and Electron Optics
DEF

An infrared sensor using lead sulfide (PbS) as the sensing material. The resistance of lead sulfide decreases when exposed to infrared radiation, resulting in increased current flow.

Key term(s)
  • lead sulphide cell

French

Domaine(s)
  • Photo-électricité et optique électronique
CONT

La mesure de cette absorption nécessite un spectrophotomètre. Un appareil à double faisceau, tels que ceux utilisés dans la salle de TP chimie-physique se compose de : [...] 5) Un système de détection constitué d'un photomultiplicateur alimenté en haute tension continue et variable (200 à 1500 voire 3000 volts!). Le photomultiplicateur n'est sensible que dans l'U.V. ou le visible. Pour le proche I.R. [infrarouge] on utilise une cellule au sulfure de plomb (PbS), couvrant le domaine 800 à 3000 nm et alimentée en 90 V continu, mais qui est beaucoup moins sensible qu'un photomultiplicateur.

Spanish

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