Polytec OFV501 Fiber Vibrometer

Polytec OFV501 Fiber Vibrometer
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Polytec fiber vibrometers are selected when test surfaces are hard to reach, stand-off distances are relatively short or the smalles measurement spot is necessary.
 

Polytec's fibro vibrometers are very successful in the field of microelectronics and computer technology. The fiber probes can be adapted to microscopes for examining structures such as micro-actuators with a laser spot diamter of 2-3 µm or smaller.
 

Features:

  • Small probe size for easy positioning of the laser
  • Fiber cable improves accessibility to hidden surfaces
  • Probes mount to Polytec's small X, Y & tip/tilt stages & 90°-bend persicope optics
  • Can be adapted to Polytec's test stands for precise positioning & simultaneous viewing and measuring of tiny parts
  • Best spatial resolution for tesing microscopic objects
 

Specifications:

Interferometer
Laser Type Helium Neon
Laser Wavelength 633 nm
Cavity Length 205 mm
Laser Output Power / Classification 2.3 mW / IIIa
System Output Power / Classification < 1 mW / II
OFV-501 Fiber Optic, Single Point Interferometer
Range of Standoff Distances 5 cm to 30 m
Length of Fiber Cable 2 m(3 m)
Minimum Bending Radius 50 mm
Optical Head for Use with Fiber Optic Interferometer
OFV-100 dimensions (L x Diam.) 4.3 x 2.25 cm (1.7 x 0.9")
OFV-3000 Controller Processor
Power Requirement 100 / 110 / 220 / 240 VAC, 150 W, 50/60 Hz
Preamplifier and Tracking Filter Section
Track Range 40 MHz ± 20 MHz
Range settings and associated maximum vibration frequencies "OFF": 1.5 MHz max, depending on decoder range selected
"FAST": 400 kHz max depending on target reflectivity
"SLOW": 100 kHz max depending on target reflectivity
 
Velocity Decoder Specifications:
Decoder Type Measurement Range Full Scale Output
(Peak to Peak)
Resolution Max. Signal Bandwidth
(3dB value)
OVD mm/s/V mm/s µm/s kHz
-01 1
5
25
125
1,000
20
100
500
2,500
20,000
0.5
0.6
0.8
1
2
35
150
150
150
150
-02 5
25
125
1,000
100
500
2,500
20,000
0.8
2
5
10
250
1,500
1,500
1,500
Output Swing ± 10 Volts
Output Impedance 100 Ω
 
Low Pass Filter Specifications:
Filter Type and Order Bessel 3rd order
Selectable Cutoff Frequencies 5 / 20 / 100 kHz

 

Displacement Decoder Section:
Decoder Type Measurement Range Full Scale Output
(Peak to Peak)
Resolution Max. Signal Bandwidth
(3dB value)
|
|
|
OVD
-20
|
|
|
  mm/V mm µm kHz
2
8
20
0.032
0.13
0.32
0.008
0.032
0.08
50
|
OVD
-10
|
80
320
1,280
5,120
1.3
5.2
20.5
82
0.32
1.3
5
20
50
Output Swing ± 8 Volts
Output Impedance 100 Ω
Triggering Manual triggering is possible using the RESET button on the front panel. Synchronized triggering is possible using related BNC connector. Slope: positive, min. signal level: 50 mVpp

 

Outputs
RF Out Buffered return signal from interferometer. BNC 40 MHz ± 32 MHz, 50 Ω
Vel Out Output voltage proportional to instantaneous velocity. BNC ± 10 V full scale, 100 Ω
Dspl Out Output voltage proportional to displacement of target. BNC ± 8 V full scale, 100 Ω