Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Ralf D Geckeler"'
Autor:
Ralf D. Geckeler, Andreas Just, Michael Krause, Olaf Schnabel, Ian Lacey, Damon English, Valeriy V. Yashchuk
Publikováno v:
Journal of Synchrotron Radiation, Vol 31, Iss 4, Pp 670-680 (2024)
Deflectometric profilometers are used to precisely measure the form of beam shaping optics of synchrotrons and X-ray free-electron lasers. They often utilize autocollimators which measure slope by evaluating the displacement of a reticle image on a d
Externí odkaz:
https://doaj.org/article/4d6fd33e1af3439b8a9b4ec9fdd5cdcb
Autor:
Ralf D Geckeler, Matthias Schumann, Andreas Just, Michael Krause, Antti Lassila, Ville Heikkinen
Publikováno v:
Geckeler, R D, Schumann, M, Just, A, Krause, M, Lassila, A & Heikkinen, V 2022, ' A comparison of traceable spatial angle autocollimator calibrations performed by PTB and VTT MIKES ', Metrologia, vol. 59, no. 2, 024002 . https://doi.org/10.1088/1681-7575/ac42b9
Autocollimators are versatile devices for angle metrology used in a wide range of applications in engineering and manufacturing. A modern electronic autocollimator generally features two measuring axes and can thus fully determine the surface normal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20f4a9122d22bc2a63b5749d7e34f58a
https://doi.org/10.1088/1681-7575/ac42b9
https://doi.org/10.1088/1681-7575/ac42b9
Autor:
Brian V. Smith, Kevan Anderson, Ralf D. Geckeler, Andreas Just, Ian Lacey, Frank Siewert, Valeriy V. Yashchuk, Jeff Dickert
Publikováno v:
Advances in Metrology for X-Ray and EUV Optics VIII.
X ray optics, desired for beamlines at free electron laser and diffraction limited storage ring x ray light sources, must have almost perfect surfaces, capable of delivering light to experiments without significant degradation of brightness and coher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0df7ee2efd402b1c0acf598959cc32a4
https://doi.org/10.1117/12.2529519
https://doi.org/10.1117/12.2529519
Autor:
Michael Krause, Ville Byman, Ralf D. Geckeler, Andreas Just, Ville Heikkinen, Maksim Shpak, Antti Lassila, Matthias Schumann
Publikováno v:
Heikkinen, V, Byman, V, Shpak, M, Geckeler, R, Just, A, Krause, M, Schumann, M & Lassila, A 2019, High-Accuracy autocollimator calibration by interferometric 2D angle generator . in L Assoufid, H Ohashi & A K Asundi (eds), Advances in Metrology for X-Ray and EUV Optics VIII ., 1110903, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 11109, Advances in Metrology for X-Ray and EUV Optics VIII 2019, San Diego, United States, 11/08/19 . https://doi.org/10.1117/12.2531023
Autocollimators are excellent measuring tools for many applications, such as adjustments or characterizations of precision mechanics, optics and instruments. Autocollimators have several characteristic error sources due to misalignment or nonideality
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71f8f252a2fa903c280ec1ed3e6f7e80
https://doi.org/10.1117/12.2531023
https://doi.org/10.1117/12.2531023
Autor:
Matthias Schumann, Ian Lacey, Valeriy V. Yashchuk, Petr Křen, Andreas Just, Ralf D. Geckeler, Michael Krause
Publikováno v:
The Review of scientific instruments, vol 90, iss 2
Geckeler, RD; Křen, P; Just, A; Schumann, M; Krause, M; Lacey, I; et al.(2019). Environmental influences on autocollimator-based angle and form metrology. Review of Scientific Instruments, 90(2), 021705-021705. doi: 10.1063/1.5057402. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7qt3d40n
Geckeler, RD; Křen, P; Just, A; Schumann, M; Krause, M; Lacey, I; et al.(2019). Environmental influences on autocollimator-based angle and form metrology. Review of Scientific Instruments, 90(2), 021705-021705. doi: 10.1063/1.5057402. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7qt3d40n
© 2019 Author(s). Deflectometric profilometers are indispensable tools for the precision form measurement of beam-shaping optics of synchrotrons and x-ray free electron lasers. They are used in metrology labs for x-ray optics worldwide and are cruci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f1c5e7ff7dcb384305e34a160c910b
https://escholarship.org/uc/item/7qt3d40n
https://escholarship.org/uc/item/7qt3d40n
Autor:
Matthias Schumann, Bernd Grubert, Frank Siewert, Tanfer Yandayan, Andreas Just, S Asli Akgoz, Michael Krause, Ralf D. Geckeler, David Kreitschik, Olaf Schnabel
A new Aperture Centring Device (ACenD) for precisely positioning small apertures with respect to the autocollimator's optics has been developed. With the new device, differences in the angle response of autocollimators between the calibration at a la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfce0ba941f328eeafc6e1bf98fa744d
https://aperta.ulakbim.gov.tr/record/99955
https://aperta.ulakbim.gov.tr/record/99955
Autor:
Michael Krause, Andreas Just, Tanfer Yandayan, Tsukasa Watanabe, Bernd Grubert, S Asli Akgoz, Murat Aksulu, Ralf D. Geckeler
Interpolation errors at small angular scales are caused by the subdivision of the angular interval between adjacent grating lines into smaller intervals when radial gratings are used in angle encoders. They are often a major error source in precision
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76969494594b0566b07b90322caac174
https://aperta.ulakbim.gov.tr/record/93287
https://aperta.ulakbim.gov.tr/record/93287
Autor:
Kevan Anderson, Brian V. Smith, Theo Nicolot, Gevork S. Gevorkyan, Valeriy V. Yashchuk, Ian Lacey, Gary Centers, Andreas Just, John Grossiord, Ralf D. Geckeler
To preserve the brightness and coherence of x-rays produced by diffraction-limited-storage-ring (DLSR) and free-electron- laser (FEL) light sources, beamline optics must have unprecedented quality. For example, in the case of the most advanced beamli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44db6795d1c1b291b2161783bedddc71
https://escholarship.org/uc/item/8560v7c3
https://escholarship.org/uc/item/8560v7c3
Autor:
K P Chaudhary, T Watanabe, F. Saraiva, Andreas Just, Konstantin Chekirda, A Lewis, R Bergmans, T Anusorn, F Dvorácek, Antti Lassila, I Victorov, R Thalmann, A Nurul, E. Banreti, J Przybylska, A. Duta, Marco Pisani, J A Salgado, Ralf D. Geckeler, S L Tan, S Zelenika, Peter Cox, R. Fira, Tanfer Yandayan, E. Prieto, Vasilev, Sitian Gao
Publikováno v:
Geckeler, R D, Just, A, Vasilev, V, Prieto, E, Dvorácek, F, Zelenika, S, Przybylska, J, Duta, A, Victorov, I, Pisani, M, Saraiva, F, Salgado, J A, Gao, S, Anusorn, T, Tan, S L, Cox, P, Watanabe, T, Lewis, A, Chaudhary, K P, Thalmann, R, Banreti, E, Nurul, A, Fira, R, Yandayan, T, Chekirda, K, Bergmans, R & Lassila, A 2018, ' Angle comparison using an autocollimator ', Metrologia, vol. 55, no. 1A, 04001 . https://doi.org/10.1088/0026-1394/55/1A/04001
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5845743c99167ec8d00f7a4a653aadf
https://cris.vtt.fi/en/publications/b28a8aa0-b43f-47fe-a62a-34649e7c7f1d
https://cris.vtt.fi/en/publications/b28a8aa0-b43f-47fe-a62a-34649e7c7f1d
Publikováno v:
Measurement. 73:231-238
An overview of the current status of angle metrology at the Physikalisch-Technische Bundesanstalt (PTB), the national metrology institute of Germany, is provided. We present our novel self-calibration method for the fast and precise in-situ calibrati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efb739e18d1b3f0c12ec5e53e0ecbd84
https://doi.org/10.1016/j.measurement.2015.05.010
https://doi.org/10.1016/j.measurement.2015.05.010