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Experimental Validation of a Novel Concept to Reduce Optical Surface Wave Front Errors by Using Deformable Bushes at Opto-Mechanical Interfaces

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dc.contributor.author Nagabhushana, S
dc.contributor.author Prasad, B. R
dc.contributor.author Nagesh, Suresh
dc.contributor.author Venkata Suresh, Narra
dc.contributor.author Sandeep, D. S
dc.contributor.author Kamath, P. U
dc.contributor.author Misra, Shalab
dc.contributor.author Hegde, Bhavana
dc.contributor.author Utkarsha, D
dc.contributor.author Sinha, Mrityunjay Kumar
dc.contributor.author Kathiravan, S
dc.contributor.author Natarajan, V
dc.contributor.author Pawan, Kumar
dc.contributor.author Amit Kumar
dc.date.accessioned 2022-08-22T10:45:51Z
dc.date.available 2022-08-22T10:45:51Z
dc.date.issued 2022-03
dc.identifier.citation Journal of Astronomical Instrumentation, Vol. 11, No. 1, 2250003 en_US
dc.identifier.issn 2251-1725
dc.identifier.uri http://hdl.handle.net/2248/8004
dc.description Restricted access en_US
dc.description.abstract One of the major objectives of the optomechanics is to support large optics required for the purpose and also to maintain high dynamic stability in operation. This requirement calls for more number of supports, to support large optics. While addressing this issue, the mounting system tends to become non-kinematic and distorts the optical surface and leads to poor image quality. The distorted optical surfaces bring in increased RMS surface wavefront errors which will result in poor image quality. In this context, a new concept is proposed in our previous publication (Nagabhushana et al., 2021) which involves introduction of deformable bushes at the optomechanical interfaces. These are deformed by applied clamping forces and also enabling all degrees of freedom (DOF) to be arrested. This also ensures that the clamping force in axial DOF is limited to a minimal value. This technique enables to arrest of axial DOF without exerting the clamping force on the optomechanical assembly there by reduces optical aberrations and improves the mounting system’s dynamic stability. This is because deformable bushes absorb all the clamping forces and the strain has no impact on the mount and therefore does not lead deformation of the optical surface. The clamping forces are simulated by Finite Element (FE) methods. Further, in this paper, the concept is verified and validated by experiments. The simulation results are observed to be in close correlation with experiment results. Improved stability is also observed by additional constraints introduced to optomechanical mounts with no compromise in wavefront errors. en_US
dc.language.iso en en_US
dc.publisher World Scientific Publishing en_US
dc.relation.uri https://doi.org/10.1142/S2251171722500039
dc.rights © World Scientific Publishing
dc.subject Optical aberrations en_US
dc.subject RMS wave front errors en_US
dc.subject Optomechanical en_US
dc.subject Mirror en_US
dc.subject Finite element analysis en_US
dc.subject Interferometry en_US
dc.title Experimental Validation of a Novel Concept to Reduce Optical Surface Wave Front Errors by Using Deformable Bushes at Opto-Mechanical Interfaces en_US
dc.type Article en_US


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