Počet záznamů: 1  

Precise measurement of grinded aspherical and freeform optical surface shape by digital holography

  1. 1.
    SYSNO ASEP0463474
    Druh ASEPC - Konferenční příspěvek (mezinárodní konf.)
    Zařazení RIVD - Článek ve sborníku
    NázevPrecise measurement of grinded aspherical and freeform optical surface shape by digital holography
    Tvůrce(i) Lédl, Vít (UFP-V) RID
    Psota, Pavel (UFP-V) RID, ORCID
    Vojtíšek, Petr (UFP-V) RID
    Doleček, Roman (UFP-V) RID
    Dlask, Martin (UFP-V)
    Zdroj.dok.Proceedings of the 6th International Conference on Optical Measurement Techniques for Structures & Systems III, OPTIMESS2015. - Maastricht : Shaker Publishing, 2016 - ISBN 978-90-423-0439-0
    Rozsah strans. 181-192
    Poč.str.12 s.
    Forma vydáníTištěná - P
    AkceInternational Conference on Optical Measurement Techniques for Structures and Systems III (OPTIMESS2015) /6./
    Datum konání08.04.2015 - 09.04.2015
    Místo konáníAntwerp
    ZeměBE - Belgie
    Typ akceWRD
    Jazyk dok.eng - angličtina
    Země vyd.NL - Nizozemsko
    Klíč. slovadigital holography ; RMS ; aspherical and freeform surfaces
    Vědní obor RIVJA - Elektronika a optoelektronika, elektrotechnika
    CEPLO1206 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
    TA03010893 GA TA ČR - Technologická agentura ČR
    Institucionální podporaUFP-V - RVO:61389021
    UT WOS000373413300018
    AnotaceA method for measurement of grinded aspherical and freeform surfaces is demonstrated in this paper. Precise measurements of semi-finished optical surfaces, like aspheres and freeforms, is still rather challenging when a high density of measurement points and a submicron precision is required. In the process of optical manufacturing every glass or ceramics element undergoes the so called generating (grinding) phase in which the element gets its basic shape. Due to the ever-growing requirements laid on the shape accuracy, the generating process is done iteratively in order to obtain the right figure before going to the next step in the manufacturing. Iterative process of grinding consists of grinding step followed by measurement step where error map is determined, if errors are too high another grinding step followed by measurement takes place until the right shape is reached. Current techniques of grinded shape measurement have many flaws, they are slow, inaccurate, the density of measurement points is low, and the level of automation is low. Another problem is that some geometries are even unmeasurable with standard methods. We proposed and developed a method based on holographic contouring with multiple illumination directions and phase shifting. This method overcomes most of the weaknesses of the current methods. Here, we demonstrate its ability to measure complex geometries in short time with precision of fraction of pm RMS.
    PracovištěÚstav fyziky plazmatu
    KontaktVladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
    Rok sběru2017
Počet záznamů: 1  

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