Identification of mid-spatial frequency error on the optotech MCG 100 when grinding optical elements

0492338 - ÚFP 2020 RIV CZ eng J - Journal Article
Beneš, Jiří - Procháska, František - Špína, Michal
Identification of mid-spatial frequency error on the optotech MCG 100 when grinding optical elements.
ACC JOURNAL. Roč. 24, č. 1 (2018), s. 7-16. ISSN 1803-9782
R&D Projects: GA MŠMT(CZ) LO1206; GA MPO(CZ) EG15_019/0004798
Institutional support: RVO:61389021
Keywords : vibration * middle * frequency * optical * aspheric * surface
OECD category: Optics (including laser optics and quantum optics)
Method of publishing: Open access
http://acc-ern.tul.cz/archiv/PDF/ACC_2018_1_01.pdf

The mid-spatial frequency errors, surface defects arising from the production of optical
aspherical surfaces may be a major problem, for example in high-performance systems. At the
production of aspherical surfaces on the Optotech MCG100, vibration measurements were
performed in various operating modes. The measurement was done with VibXpert II. This
device uses piezoelectric sensors to record vibration acceleration. The measurement data were
then processed in Matlab software. The aim was to identify frequencies, which may have a
negative influence on optical element manufacturing, and also to outline possible causes of
their origin. In the observed spectrum (30-800 Hz), significant frequencies from several basic sources
were found. This is the tool spindle rotation, tool rotation, the axes control loop, and the
movement of the axes themselves.
Permanent Link: http://hdl.handle.net/11104/0287861