Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift
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....
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/143631 |
| _version_ | 1824455195951628288 |
|---|---|
| author | Agusanto, Kusuma Lau, Gih-Keong Liu, Ting Zhu, Chuangui |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Agusanto, Kusuma Lau, Gih-Keong Liu, Ting Zhu, Chuangui |
| author_sort | Agusanto, Kusuma |
| collection | NTU |
| description | 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. |
| first_indexed | 2025-02-19T03:34:21Z |
| format | Journal Article |
| id | ntu-10356/143631 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:34:21Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1436312023-03-04T17:12:23Z Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift Agusanto, Kusuma Lau, Gih-Keong Liu, Ting Zhu, Chuangui School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Measurement Metrology 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. Economic Development Board (EDB) Accepted version This work is supported by Nanyang Technological University and Sunny Instruments Singapore as part of the Industrial Postgraduate Programme (IPP) from Economic Development Board (EDB) of Singapore. 2020-09-15T02:40:29Z 2020-09-15T02:40:29Z 2019 Journal Article Agusanto, K., Lau, G.-K., Liu, T., & Zhu, C. (2019). Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift. Applied Optics, 58(9), 2277-2283. doi:10.1364/AO.58.002277 1539-4522 https://hdl.handle.net/10356/143631 10.1364/AO.58.002277 31044922 9 58 2277 2283 en Applied Optics © 2019 Optical Society of America (OSA). All rights reserved. This paper was published in Applied Optics and is made available with permission of Optical Society of America (OSA). application/pdf |
| spellingShingle | Engineering::Mechanical engineering Measurement Metrology Agusanto, Kusuma Lau, Gih-Keong Liu, Ting Zhu, Chuangui Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift |
| title | Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift |
| title_full | Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift |
| title_fullStr | Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift |
| title_full_unstemmed | Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift |
| title_short | Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift |
| title_sort | effect of oblique retroreflection from a vibrating mirror on laser doppler shift |
| topic | Engineering::Mechanical engineering Measurement Metrology |
| url | https://hdl.handle.net/10356/143631 |
| work_keys_str_mv | AT agusantokusuma effectofobliqueretroreflectionfromavibratingmirroronlaserdopplershift AT laugihkeong effectofobliqueretroreflectionfromavibratingmirroronlaserdopplershift AT liuting effectofobliqueretroreflectionfromavibratingmirroronlaserdopplershift AT zhuchuangui effectofobliqueretroreflectionfromavibratingmirroronlaserdopplershift |