Mechanical analysis on magnesium alloy rotating mirror for ultra-high-speed camera

Chunbo Li; Minqiu Liu; Xikui Ren; Chenlin Du; Hongbin Huang; Shuangchen Ruan

doi:10.1117/12.2317512

5 March 2018 Mechanical analysis on magnesium alloy rotating mirror for ultra-high-speed camera

Chunbo Li, Minqiu Liu, Xikui Ren, Chenlin Du, Hongbin Huang, Shuangchen Ruan

Proceedings Volume 10710, Young Scientists Forum 2017; 107103L (2018) https://doi.org/10.1117/12.2317512
Event: Young Scientists Forum 2017, 2017, Shanghai, China

Abstract

Rotating mirror is not only as an imaging element in optical path of ultra-high speed camera, where imaging quality is affected by surface quality and plane deformation of the rotating mirror, but also as an element to implement ultra-high speed, because performances of the ultra-high-speed camera system are mainly dependent on the static and dynamic mechanical properties of the rotating mirror. In this paper, the static and dynamic properties of magnesium alloy rotating mirror with equilateral-triangle cross-sections were investigated by theoretically and numerically method. At the speed of 2×10⁵ rpm, the maximum lateral deformations of the mirror facet with width 17.32 mm and length 40 mm is 2.476 μm. The maximum von Mises stress is 35.1 MPa. The deformation and stress are less than that of aluminum alloy rotating mirror, which has been successfully applied in many types of RM for ultra-high speed cameras. The first three frequencies of magnesium alloy rotating mirror are 9,539.9 Hz, 9,540.9 Hz and 12,726.0 Hz, respectively. While the first three frequencies of aluminium alloy rotating-mirror are 9,683.9 Hz, 9,685.2 Hz and 11,016.0 Hz. From which it is preliminarily shown that a magnesium alloy rotating mirror can be used as replacement for an aluminium alloy rotating mirror in ultra-high-speed camera.

Citation Download Citation

Chunbo Li, Minqiu Liu, Xikui Ren, Chenlin Du, Hongbin Huang, and Shuangchen Ruan "Mechanical analysis on magnesium alloy rotating mirror for ultra-high-speed camera", Proc. SPIE 10710, Young Scientists Forum 2017, 107103L (5 March 2018); https://doi.org/10.1117/12.2317512

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