Characterisation of a cryostat using simultaneous, single-beam multiple-surface laser vibrometry
Journal Article
·
· AIP Conference Proceedings
- Oxford Instruments Nanoscience, Tubney Woods, Abingdon, Oxon, OX13 5QX (United Kingdom)
A novel range-resolved interferometric signal processing technique that uses sinusoidal optical frequency modulation is applied to multi-surface vibrometry, demonstrating simultaneous optical measurements of vibrations on two surfaces using a single, collimated laser beam, with a minimum permissible distance of 3.5 cm between surfaces. The current system, using a cost-effective laser diode and a fibre-coupled, downlead insensitive setup, allows an interferometric fringe rate of up to 180 kHz to be resolved with typical displacement noise levels of 8 pm · Hz{sup −05}. In this paper, the system is applied to vibrometry measurements of a table-top cryostat, with concurrent measurements of the optical widow and the sample holder target inside. This allows the separation of common-mode vibrations of the whole cryostat from differential vibrations between the window and the target, allowing any resonances to be identified.
- OSTI ID:
- 22608648
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1740; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Under-sampling in a Multiple-Channel Laser Vibrometry System
Invited Article: Expanded and improved traceability of vibration measurements by laser interferometry
The use of electronic shearography as a nondestructive inspection tool
Thesis/Dissertation
·
Wed Feb 28 23:00:00 EST 2007
·
OSTI ID:902375
Invited Article: Expanded and improved traceability of vibration measurements by laser interferometry
Journal Article
·
Sat Dec 14 23:00:00 EST 2013
· Review of Scientific Instruments
·
OSTI ID:22220209
The use of electronic shearography as a nondestructive inspection tool
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:175346