Concept of a polishing tool based on viscoelastic properties for midspatial frequencies suppression on aspheric surfaces

0512122 - ÚFP 2020 RIV US eng J - Journal Article
Beneš, Jiří - Matoušek, Ondřej - Procháska, František - Tomka, David - Pechociaková, M.
Concept of a polishing tool based on viscoelastic properties for midspatial frequencies suppression on aspheric surfaces.
Optical Engineering. Roč. 58, č. 11 (2019), č. článku 115102. ISSN 0091-3286. E-ISSN 1560-2303
R&D Projects: GA MŠMT(CZ) CZ.02.1.01/0.0/0.0/16_026/0008390
Institutional support: RVO:61389021
Keywords : midspatial frequency suppression * viscoelastic polishing tool * viscoelastic properties analysis
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 1.113, year: 2019
Method of publishing: Limited access
https://www.spiedigitallibrary.org/journals/Optical-Engineering/volume-58/issue-11/115102/Concept-of-a-polishing-tool-based-on-viscoelastic-properties-for/10.1117/1.OE.58.11.115102.short?SSO=1

We focus on the subaperture polishing tool concept development for suppressing midspatial frequencies (MSF) arising from computer numerical control machining of aspherical optical surfaces. The selective effect in the MSF range is achieved by setting the tool viscoelastic properties so that rigidity increases in the frequency-domain generated by the rotational tool movement over the aspheric surface with the MSF while the tool remains flexible in the lower frequency range associated with tool radial direction movement. The mechanism of MSF removal is discussed in detail, including in terms of elasticity module frequency dependences, and is also experimentally verified. In order to monitor and optimize viscoelastic properties, especially in regard to frequency dependences, the dynamic mechanical analysis method has been developed and applied and is presented in the paper as well.
Permanent Link: http://hdl.handle.net/11104/0302325