Mechanical alignment of optical system: CMMs forces and damages on optical elements

M. Aliverti; G. Pariani; M. Riva; B. Saggin; M. Tarabini

doi:10.1117/12.2313833

10 July 2018 Mechanical alignment of optical system: CMMs forces and damages on optical elements

M. Aliverti, G. Pariani, M. Riva, B. Saggin, M. Tarabini

Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III; 107064M (2018) https://doi.org/10.1117/12.2313833
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

Traditional alignment techniques for optical systems are usually based on iterative procedures where each optical element is positioned and aligned with push-pull systems and the feedback is provided by the images acquired on the focal planes. The long-term stability of those optomechanical mounts can be critical and, In order to overcome this limitation a new mounting has been proposed together with a new alignment strategy based on the direct mechanical measurement of the optical surfaces. The contact between the probe and the surfaces of the optics can be a critical point and lead to different alignment strategies. In this paper, the forces applied by different Coordinate Measuring Machines (CMMs) will be presented together with a derived theoretical model. Moreover, the results of the damage tests performed on different optical elements will be shown and some general prediction rule will be presented.

Citation Download Citation

M. Aliverti, G. Pariani, M. Riva, B. Saggin, and M. Tarabini "Mechanical alignment of optical system: CMMs forces and damages on optical elements", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107064M (10 July 2018); https://doi.org/10.1117/12.2313833

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