Polytec OFV501 Fiber Vibrometer

Polytec fiber vibrometers are selected when test surfaces are hard to reach, stand-off distances are relatively short or the smallest 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 diameter of 2-3 µm or smaller.

Product Info

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

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 periscope optics
Can be adapted to Polytec's test stands for precise positioning & simultaneous viewing and measuring of tiny parts
Best spatial resolution for testing microscopic objects

SKU: POLY-OFV501