Karakterizacija merilnikov osvetljenosti

JANEŽIČ, ANŽE (author), Bizjak, Grega (mentor)

V diplomskem delu sem analiziral vpliv časovno spremenljive svetlobe in neenakomerne osvetljenosti površine senzorja posameznih merilnikih osvetljenosti. V nalogi najprej na kratko predstavim svetlobo, razlike med radiometrijo in fotometrijo ter posamezne fotometrične veličine. V nadaljevanju opišem fotometer, merilnik osvetljenosti in kaj vpliva na točnost merilnika. Predstavim tudi kalibracijo merilnika osvetljenosti in praktično izvedbo kalibracije na fotometrični klopi. Sledi definicija in opis posameznih faktorjev, ki vplivajo na merilnik osvetljenosti. Podrobneje opišem postopek preverjanja vpliva časovno spremenljive svetlobe in neenakomernosti osvetljenosti ter izračun posameznih faktorjev, ki okarakterizirajo vpliv. Nato sledita praktična izvedba meritev z inštrumenti različnih razredov točnosti in analiza rezultatov. Na koncu podam svoje ugotovitve in opredelim, kateri inštrument se izkaže kot najboljši in kateri najslabši.

• Language: Slovenian
• Keywords: faktor časovno spremenljive svetlobe, faktor neenakomerne osvetljenosti, merilnik osvetljenosti, kalibracija
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2019
• PID: 20.500.12556/RUL-110323
• Publication date in RUL: 13.09.2019

Secondary language

• Language: English
• Title: Characterization of illuminance meters

Abstract

In my thesis I analysed the influence of modulated light and spatial non-uniformity of illumination on individual light meters. In the paper, I first briefly present the light, the differences between radiometry and photometry, and the photometric quantities. In the following, I describe the photometer, the illuminance meter and what affects the accuracy of the photometer. I also present the calibration of the illuminance meter and the practical implementation of the calibration on a photometric bench. Then I define and describe the individual factors that affect the illuminance meter. I describe in more detail the procedure for checking the influence of modulated light and spatial non-uniformity of illumination, as well as calculating the indices that characterize the impact. This is followed by the practical implementation of measurements with instruments of different accuracy classes and the analysis of results. Finally, I give my findings and identify which instrument turns out to be the best and which is the worst.

• Keywords: modulated light factor, spatial non-uniformity factor, illuminance meter, calibration