Photoconductors Utilized in TV Camera Tubes

Abstract

This article surveys the various photoconductors currently used in beam-scanned and Vidicon-type television tubes. The chemical, physical, and electronic characteristics of the photoconductors are described, as well as the way they are utilized in the camera tube to produce a television signal. The various materials discussed are selenium, antimony trisulfide, lead oxide, cadmium selenide, zinc cadmium telluride, zinc sulfide, and silicon, all of which have been used as the basis for these photoconductors. PHOTOCONDUCTIVE--MATERIAL TRANSPARENTSIGNAL ELECTRODE-C, ONTACT TO SI GNAL ELECTRODE I f ----__ GLASS FACEPLATE Fi g. 2. The typical configuration and location of a photoconductor in a TV camera tube. 5C ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 138.251.14.35 Downloaded on 2015-03-11 to IP 6C J. Electrochem. Soc.: REVIEWS AND NEWS January 1987 GLASS FACEPLATE--F~ % + VOLTS APPLI ED TO ELECTRON BEAM SI GNAL ELECTRODE ,,lit ~1 I DRI VES SCANNED SI DE TO ZERO VOLTS PHOTOCONDUCTOR ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 138.251.14.35 Downloaded on 2015-03-11 to IP Vol. 134, No. 1 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 138.251.14.35 Downloaded on 2015-03-11 to IP

Φωτοκαταλυτική Διάσπαση Οργανικών Ρύπων Και Αναγωγή Μετάλλων Σε Υδατικά Διαλύματα Παρουσία Πολυοξομεταλλικών Ενώσεων

“…Το a-Se παρουσιάζει χαμηλή ηλεκτρική αγωγιμότητα στο σκοτάδι, η οποία αυξάνει κατά δύο τάξης μεγέθους κατά την έκθεσή του στο φως (57) . Χάριν της φωτοαγωγιμότητας του χρησιμοποιείται ευρέως στα φωτοαντίγραφα από τη Xerox (58) και στις κάμερες τηλεόρασης (59) (60) . Το σελήνιο επιδρά σε πολλούς ιστούς αλλά κυρίως στο νευρικό σύστημα.…”