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Precise measurement of grinded aspherical and freeform optical surface shape by digital holography
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SYSNO ASEP 0463474 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Precise 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 stran s. 181-192 Poč.str. 12 s. Forma vydání Tištěná - P Akce International Conference on Optical Measurement Techniques for Structures and Systems III (OPTIMESS2015) /6./ Datum konání 08.04.2015 - 09.04.2015 Místo konání Antwerp Země BE - Belgie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova digital holography ; RMS ; aspherical and freeform surfaces Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika CEP LO1206 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy TA03010893 GA TA ČR - Technologická agentura ČR Institucionální podpora UFP-V - RVO:61389021 UT WOS 000373413300018 Anotace A 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
Počet záznamů: 1