<?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://AATesaurus.cultura.gencat.cat/aat/getty_en">photometers</topic></authority><related type="narrower"><topic>goniophotometers</topic></related><related type="narrower"><topic>photoelectric photometers</topic></related><related type="narrower"><topic>spectrophotometers</topic></related><related type="narrower"><topic>light meters</topic></related><related type="other"><topic>photometry</topic></related><related type="broader"><topic>light measuring devices</topic></related><related type="broader"><topic>photographic equipment</topic></related><variant type="other"><topic>fotómetros</topic></variant><variant type="other"><topic>photometer</topic></variant> <note xml:lang="en"><![CDATA[ Devices that measure the intensity of light falling on a surface (illuminance), or reflected by a surface (luminance), or emitted by a light source (luminous flux or luminous intensity). ]]></note></mads>