<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Óptica-Aparatos e instrumentos</topic></authority><related type="narrower"><topic>Detectores ópticos</topic></related><related type="narrower"><topic>Escáneres ópticos</topic></related><related type="narrower"><topic>Microscopios</topic></related><related type="narrower"><topic>Telescopios</topic></related><related type="narrower"><topic>Dispositivos optoelectrónicos</topic></related><related type="other"><topic>Espejos</topic></related><related type="other"><topic>Materiales ópticos</topic></related><related type="other"><topic>Lentes</topic></related><variant type="other"><topic>Óptica-Aparatos y material</topic></variant><variant type="other"><topic>Aparatos ópticos</topic></variant><variant type="other"><topic>Instrumentos ópticos</topic></variant></mads>