<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31439032</termId><termName>vidicons</termName><termType>PT</termType><termNote><![CDATA[ Small television camera tubes of a particular kind, in which the image is formed on a transparent electrode coated with photoconductive material, the video signal being obtained from the variation in the current flowing to or from this as it is scanned by a beam of (usually low-speed) electrons. ]]></termNote><termCreatedDate>2026-03-30 20:58:20</termCreatedDate><relation><relationType>UF</relationType><termId>31439033</termId><termName>vidicon</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31413129</termId><termName>television camera tubes</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299393</termId><termName>Plumbicons (TM)</termName><termType>PT</termType></relation></term>  </Zthes>