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Laserinterferometric

Vibrometer

LSV-Series

PRELIMINARY  DATA  SHEET   Features
The laserinterferometric vibrometer is an ideal instrument for accurate, noncontact determination of temporal changes in the positions of objects or surfaces of arbitrary roughness. It detects mechanical vibrations at frequencies ranging from 0 to 500 kHz with subnanometer resolution. These instruments have been designed based on the proven concept of our SP-S Series laserinterferometeric vibrometers. The working distance of the LSV-Series vibrometer can be adjusted continuously in a wide range by a zoom objective.  The complete system consists of a compactly designed fiberoptic-coupled sensor head, a modularly designed electronics unit incorporating a He-Ne laser, and various interfaces. The fiber-coupled interferometer converts motions along the optical axes into interference fringes that are transmitted to fast, high-resolution, demodulation electronics for processing. Opera-tion and display of results employs a PC running specialized data-analysis software.   • High precision vibration analysis and length measurement system • Noncontact measurements • Flexible installation • Adaptable to suit customers' needs• Fiberoptic coupling of the laser beam (eliminates thermal influences on measurement results) • Correction of ambient conditions • Easy to align and use • Includes FFT spectrum-analysis software
  Standard signal processor  
Technical Data   LSV-standard    Incremental signal-processing board equipped with vibrometer option: • High speed signal processing board • Cyclic data acquisition • External triggering input • Wavelength correction electronics • RS-232 C serial interface • USB interface  Working Range:
 
  Optional signal processor
   Analog data output: • 8 length ranges • 16-bit resolution for output amplitudes  up to ± 3 V • Cutoff frequency 500 kHz • Continuous data output
Software for Windows   Applications
• Spectrum analysis • Digital filtering • Record lengths ranging from 256 to 32,768 data points • Computation of the speeds and accelerations of vibrational motions • Spectral averaging • Triggering by external hardware   • Making noncontacting vibration measurements on surfaces of arbitrary roughness • Determining the vibrational modes of plates and shells • Determining the resonant frequencies of microscopic objects • Making multi-coordinate measurements employing several systems • Performing high-precision length measurements

 

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