Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift

Agusanto Kusuma; Lau Gih-Keong; Liu Ting; Zhu Chuangui

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Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift

机译：振动镜斜逆向对激光多普勒换档的影响

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A laser Doppler vibrometer (LDV) fails to measure a large out-of-plane vibration of a rotating mirror when the mirror obliquely reflects the laser beam away, causing a signal loss from being detected. To solve this problem, an external retroreflective tape was used to recover the oblique reflection. However, the reading of LDV obtained from the recovered signal is not right because the retroreflection adds extra Doppler frequency shifts to the oblique reflection. Here, we first derive the relationship of Doppler shift to the oblique angle of retroreflection. For the first time with the help of retroreflection, a standard LDV can measure the largely vibrating mirror as well as a high-speed camera, albeit without the need for heavy computation. (C) 2019 Optical Society of America

机译：激光多普勒振动计（LDV）不能在镜子倾斜地反射外部反射时测量旋转镜的大平面振动，从而导致检测到信号丢失。为了解决这个问题，用于恢复倾斜反射的外部逆向反射胶带。然而，从恢复的信号获得的LDV读数是不对的，因为逆向反射增加了额外的多普勒频率转移。在这里，我们首先导出多普勒变换与逆向反射角度的关系。借助逆流的帮助首次，标准LDV可以测量大量振动的镜像以及高速相机，尽管没有需要重型计算。（c）2019年光学学会

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来源
《Applied optics》 |2019年第9期|共7页
作者
Agusanto Kusuma; Lau Gih-Keong; Liu Ting; Zhu Chuangui;
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作者单位

Nanyang Technol Univ Sch Mech &

Aerosp Engn Singapore 639798 Singapore;

Natl Chiao Tung Univ Dept Mech Engn Hsinchu 30010 Taiwan;

Sunny Instruments Singapore Pte Ltd Singapore 159836 Singapore;

Sunny Instruments Singapore Pte Ltd Singapore 159836 Singapore;

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正文语种 eng
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Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift

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