Ono Sokki LV-1800 Laser Doppler Vibrometer

The Ono Sokki LV-1800 non-contact type Laser Doppler Vibrometer uses newly designed interference optical system and has achieved improvement of detection sensitivity by 20 dB compared to the conventional models. The built-in positioning camera makes it easy to check the target by laser beam irradiation.

The LV-1800 can perform amplitude velocity measurements in a wide range of fields that are difficult with a contact type vibration sensor; small actuator using piezoelectric element, cell phones and digital camera with MEMS (Micro Electro Mechanical Systems), inverter an other devices in an EV/HEV. By using the LV-1800 with FFT Analyzer, it is possible to visualize not just vibration but the state of the vibration. 

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  • Integrated sensor and camera - Without degradation of the detection sensitivity, you can check targets and the parts irradiated by laser beams displaying on the Windows based PC.
  • Greatly increased detection ability - Newly designed interference optical system has achieved improved the detection sensitivity by 20 dB (ten times) compared to the conventional models. Restrictions of targets and detecting environment have been dramatically eased to facilitate sensor installation and setup.  z
  • Detectable various targets with wide range up to 4 ranges - The LV-1800 can detect a wide range of amplitude from 0.05 µm/s* to 10 m/s from high velocity amplitudes of ultrasonic tools and piezoelectric devices to small amplitudes generated by thin film, MEMS, and ceramic capacitors.
    *: When the LV-0800 small velocity range board is mounted.
  • Quick confirmation of the focal position and the detection status - The level indicator equipped on the sensor helps quick and reliable setup while checking the focal position or detection status at hand.
  • Small and light-weight sensors with excellent ease of use - Level indicator and error indicator are equipped on the sensor so that checking of detection status and setup become easy. As being designed to be separated from laser light source, the sensor is small and light-weight. Without any restrictions, laser beams can be irradiated in all directions.
  • Easy storage and transporting - The main unit of the LV-1800 is 33% lighter compared to the conventional model. As the sensor and the cable can be stored in the main body, storage and transportation can be done easily and safely. Storage trunk (option) can store the magnetic stand, illumination unit as well as the main unit.
  • Wide range of options provide utmost solutions - As the LV-1800 has wide variety of options, you can find suitable applications depending on requirements. For example, using the LV-1800 with an FFT Analyzer and exclusive software can visualize the behavior and characteristics of a target.


Detection unit

Detection demodulation system

Velocity demodulation using optical heterodyne detection

Laser beam

Light source

He-Ne laser (=approx.633 nm)

Reflected light output

Within 1 mW

Laser safety standard

Conforming to Laser Class 2
* Please refer to for more details.

Minimum laser spot diameter

Approx. 20 μm or less (φ=1/e2 when the focusing position is 100 mm.)
Approx. 3 μm or less (When the LV-0151A is mounted.) WD=approx. 38.9 mm

Standard lens

Variable-focus lens

100 mm to 10 m (∞)

Distance scale

100 mm to 10 m (∞)  *With the coherence length mark

Size of attachment

M22 x 0.5 Depth 5.5 mm

Built-in positioning camera
 LV-0181 (option)

Installing method

Built-in the sensor (Can be installed after delivery. Please contact your nearest distributor for more details.)


USB 2.0
*output from the conversion section USB mini-B connector

Imaging element

CMOS color 1/4-inch

Number of pixels

More than 300,000 pixels

Image size

VGA (640 x 480)

Frame rate

30 frames/second

Minimum imaging range

10 x 7.5 mm (TYP) WD=100 mm (at minimal length)

2.1 x 1.6 mm (TYP) When the LV-0151A objective lens is mounted.

Imaging position

An erect image when you see the indicator panel of the sensor head (rotatable).



White balance




Operating environment

Windows®7(SP1 or later)/10 Display True Color 24 bit or more

Camera focus

Adjusted by the objective lens, confocal with the laser spot

Sensor suspending

Screw for sensor suspension

Backside x1 M8 depth 8mm *LV-0030 large size magnetic stand can be used.
Side x1
Side x 2 M4 depth 5 mm

Tripod setup

Use the LV-0019 camera screw adapter (option)

Demodulation sensitivity monitor

Signal level indicator

10-segment LED array display
* Works with the signal level indicator display on the conversion unit.

ERROR indicator

LED display (red)

Signal cable

Cable length

3 m

The cable is wound up on the cable clamp (rear panel of the conversion unit).


φ=10.5 mm


Oil-resistant coating

Minimum bend radius

R=40 mm or more

Outer dimensions of the detection unit


53 mm

Not including the protruded section


52.5 mm


152.5 mm

Weight of the detection unit

Approx. 750 g (When the LV-0181 is installed. Not including the cable.)

Conversion unit

Detection velocity

Frequency range

0.3 Hz to 3 MHz (fc=-3dB) *common to each velocity range
0.001 m/s/V (option): 0.3 to 200 kHz (fc=-3dB)

Maximum detection velocity

10 m/s o-p (20 m/s p-p)

Minimum velocity resolution

0.3 μm/s or less (when at 0.01 (m/s) /v) 0.05 μm/s or less 8when the LV-0800 is installed.)


±10 V (20 V p-p) *Input impedance: 100 kΩ or more

Polarity of  output voltage

+ voltage when moving closer to the sensor side

DC offset

20 mV or less

Output impedance

50 Ω

Minimum input impedance

100 Ω

Connector type

BNC (C02)

Velocity range

1.0 (m/s)/V

10 m/s 0-p(20 m/sp-p)

0.1 (m/s)/V

1 m/s 0-p(2 m/sp-p)

0.01 (m/s)/V

0.1 m/s 0-p(0.2 m/sp-p)

0.001 (m/s)/V (option)

0.01 m/s 0-p(0.02 m/sp-p)

Over indicator

Red LED lights up when the detected velocity exceeds + 5% of upper limit. (5 % Over)

Demodulation sensitivity monitor

Signal level indicator

20-segment LED array display
* Works with the signal level indicator display on the detection unit.

MONITOR output

0 to 10 V
Output impedance 50 Ω
Minimum input impedance 100 kΩ or more
Connector type BNC (C02)

ERROR indicator

Light up of red LED

High-pass filter (HPF)

100 Hz fc=-3dB
OFF (0.3 Hz)

Low-pass filter (LPF)

50 kHz fc=-3dB
*Not selectable when 0.001 (m/s)/V range is selected.
100 kHz
1 MHz*
OFF (3 MHz)

Image output for positioning (option)

Image output





Light up of white LED *When the LV-0180 is installed.

Connector type

USB mini-B type

Control of laser radiation

ON/OFF by the panel switch on front side

Function of power-on laser irradiation can be specified at time of order.

Laser beam irradiation indicator

*Green LED light up when laser beam is radiated.

Mechanical shutter

Contact input The laser beam radiation is stopped at contact open.
Connector type Receptacle:RM12BRB-2S

Storage device

Storage of detection unit

Stored in the conversion unit

Storage of cable

Wound up on the cable clamp (rear panel of the conversion unit).
Outer dimensions


410 mm Not including protruded section


120 mm


324 mm


Approx. 8.1 kg (including sensor and cable)

Operating temperature range

0 to 40°C

Operating humidity range

30 to 80 % RH with no condensation

Storage temperature range

-10 to +50°C

Input voltage

AC100 to 240 V

50/60 Hz

Power consumption

60 VA

Cooling method

Natural air cooling (no-vibration cooling)

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