Angle comparison using an autocollimator

Ralf D. Geckeler, Andreas Just, Valentin Vasilev, Emilio Prieto, František Dvorácek, Slobodan Zelenika, Joanna Przybylska, Alexandru Duta, Ilya Victorov, Marco Pisani, Fernanda Saraiva, Jose Antonio Salgado, Sitian Gao, Tonmueanwai Anusorn, Siew Leng Tan, Peter Cox, Tsukasa Watanabe, Andrew Lewis, K. P. Chaudhary, Ruedi ThalmannEdit Banreti, Alfiyati Nurul, Roman Fira, Tanfer Yandayan, Konstantin Chekirda, Rob Bergmans, Antti Lassila

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)


    Autocollimators are versatile optical devices for the contactless measurement of the tilt angles of reflecting surfaces. An international key comparison (KC) on autocollimator calibration, EURAMET.L-K3.2009, was initiated by the European Association of National Metrology Institutes (EURAMET) to provide information on the capabilities in this field. The Physikalisch-Technische Bundesanstalt (PTB) acted as the pilot laboratory, with a total of 25 international participants from EURAMET and from the Asia Pacific Metrology Programme (APMP) providing measurements. This KC was the first one to utilise a high-resolution electronic autocollimator as a standard. In contrast to KCs in angle metrology which usually involve the full plane angle, it focused on relatively small angular ranges (±10 arcsec and ±1000 arcsec) and step sizes (10 arcsec and 0.1 arcsec, respectively). This document represents the approved final report on the results of the KC.
    Original languageEnglish
    Article number04001
    Issue number1A
    Publication statusPublished - 2018
    MoE publication typeA1 Journal article-refereed


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