Laser Doppler Vibrometer



製品写真(レーザドップラ振動計 LV-1800)

The 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. 


  • 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 20dB (ten times) compared to the conventional models. Restrictions of targets and detecting environment have been dramatically eased to facilitate sensor installation and setup.


  • Detectable various targets with wide range up to 4 ranges
  • The LV-1800 can detect a wide range of amplitude from 10 m/s to 0.05 µm/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.

System Configuration

(Each product in the recorder/analyzer section in the below configuration is linked to its HTML page.)



Detection unit

Detection demodulation system

Velocity demodulation using optical heterodyne detection

Laser beam

Light source He-Ne laser (632.8 nm wavelength)
Reflected light output

Within 1 mW

Laser safety standard Conforming to Laser Class 2
* Please refer to <conforming standard> 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.



White balance




Operating environment

Windows® / XP (SP2 or later)/Vista (SP1 or later)/7 Direct-X 9.0 or later/ 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

Coating Oil-resistant coating
Minimum bend radius

R=40 mm or more

Outer dimensions of the detection unit W 53 mm

Not including the protruded section

H 52.5 mm
D 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 o-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.)

Output ±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(MAX)
0.1 (m/s)/V 1 m/s 0-p(MAX)
0.01 (m/s)/V 0.1 m/s 0-p(MAX)
0.001 (m/s)/V (option) 0.01 m/s 0-p(MAX)
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
100 kHz
1 MHz
OFF (3 MHz)
Image output for positioning (option) Image output Digital
Standard USB2.0
Display 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 W 410 mm Not including protruded section
H 120 mm
D 325 mm
Weight 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

Convection air cooling (no-vibration cooling)

Conforming standard


FDA (CDRH) 21CFR 1040.10 Laser Notice 50

CE marking

Low voltage directive


EMC directive

EN61326-1:2006 Class A Table 2

FCC (Part 15B)


Relation between vibrating direction and voltage output


Imaging range taken by the LV-0181
(Built-in positioning camera)


Relation between operating distance and spot diameter


<Resolution/dynamic range evaluation condition>


LPF:100 kHz ON
At maximum demodulation using a corner cube.
Power spectrum observation by FFT Analyzer
1 kHz range 1 kHz, 2048 lines, averaging of 256 times


* Please refer to the above graph for the each filter characteristics.

Example of usage

Ultrasonic applied devices

Ultrasonic welding machine, wire bonding machine, ultrasonic cutter, ultrasonic homogenizer, ultrasonic soldering iron
Ultrasonic microscope, ultrasonic atomizer
Fishfinder, frequency/amplitude measurement of sonar device
Nanoimprinting device, piezoelectric vibrating gyroscopes
Ultrasonic motor, ultrasonic cleaning machine, ultrasonic scalpel
Behavior detection of living body (insect etc.)

IT· mediums

Transmission characteristic of optical pickup (CD· DVD· BD etc.)
Vibration measurement of disc surface
Behavior of ink-jet element
Slider & VCM of HDD,HDD, vibration analysis of flying head and other component
Vibrating thin film in cell phone's microphone, receiver or speaker
Vibrating motor
Ultrasonic motor for AF (autofocus) function in camera

Automobiles(including EV· HEV)

Inverter motor, inverter and its component device, smoothing condenser etc
Rotation tracking analysis of engine, transmission
Shock sensor (MEMS)
Internal vibration of light valve
Differential displacement measurement of brake caliper, fuel injector
Vibration of warning sound alarm


Valve movement
Long distance vibration of pipework, blower, motor etc
Laser ultrasonics



(The following options are not conformable to CE marking.)

LV-0160 20 MHz Wideband unit


製品写真(LV-0160 20 MHz ワイドレンジユニット)


Connecting this unit to the LV-1800 enables detection of amplitude up to 20 MHz.

*Modification is required to use the LV-0160 with the LV-1800. Please contact your nearest distributor for more details.


Measurement range :2 mm/s to 5 m/s
Velocity range :2 (m/s)/V
Measurement frequency range :1 Hz to 20 MHz
Velocity signal output :Analog voltage ±2.5 V
Output impedance :75 Ω
Power supply :AC 100 V ±10%, 1 A
Operating temperature range :0 to +40°C
Outer dimensions :420 (W)×100 (H)×500 (D) mm
Weight :approx. 6.5 kg

LV-0181 Built-in positioning camera


イラスト(LV-0181 位置決め用内蔵カメラ)


Built-in digital camera with high sensitivity for positioning. It can display the images of detected parts on Windows-based PC via USB 2.0 output.

Connector type :USB2.0
(main unit side: mini-B)
Imaging element :CMOS color sensor 1/4 inch
Number of pixels :300,000 pixels or more
Image size :VGA(640×480)
Frame rage :30 frame/second
Range of shooting :10 mm×7.5 mm to (measurement distance 100 mmto)
Function : exposure/gain/white balance(automatic)


Operating environment:Windows® XP(SP2 or later)/Vista(SP1 or later)/7 Direct-X 9.0b or later/Display True Color 24 bit or more
Camera focus: Shared with laser beam focus

LV-0800 Small velocity range board


The LV-0800 is a small velocity range board to be installed to the LV-1800. By adding this device, it enables measurement of those which are difficult to be detected in standard measurement ranges.

Velocity range :0.001 (m/s)/V
(0.01 µm/s0-p(MAX))
Velocity resolution :0.05 µm/s
Frequency range :0.3 to 200 kHz (fc = -3 dB)



LV-0112 Displacement output board / LV-0111 Acceleration output board


When the LV-0112/0111 is built in the LV-1800, it converts the detected velocity (m/s) into displacement (m) or acceleration (m/s2). Signals are output from the optional connector, and the velocity signal and the displacement/acceleration signal can be obtained simultaneously.

*Either one of the LV-0112 or the LV0111 can be installed on the LV-1800.


Signal source :Internally receives the velocity signal from the LV-1800
Output voltage :±10 V (MAX)
DC offset :20 mV or less
Maximum amplitude :Ten times of an each setup range (0-p)
Amplitude conversion error :±5% or less
Amplitude output polarity :+ Voltage when moving closer to a sensor side.



● LV-0112 Displacement output board


Setup range of the LV-1800 Displacement range
1Hz to 20kHz 10Hz to  50kHz 1kHz to 200kHz
1.0(m/s)/V 100(mm/V)  1(mm/V) 10(µm/V)
0.1(m/s)/V 10(mm/V) 100(µm/V) 1(µm/V)
0.01(m/s)/V 1(mm/V) 10(µm/V)  100(nm/V)
0.001(m/s)/V 0.1(mm/V) 1(µm/V)  10(nm/V)


● LV-0111 Acceleration output board

Setup range of the LV-1800 Acceleration range
1Hz to 2kHz 1Hz to 20kHz 100Hz to 400kHz
1.0(m/s)/V 103(m/s2)/V 105(m/s2)/V 107(m/s2)/V
0.1(m/s)/V 102(m/s2)/V 104(m/s2)/V 106(m/s2)/V
0.01(m/s)/V 101(m/s2)/V 103(m/s2)/V 105(m/s2)/V


LV-0185 Illumination unit


製品写真(LV-0185 照明ユニット)


The LV-0185 is an option which illuminates a target coaxially with laser beams. When an objective lens is mounted, it illuminates the detecting part at the same working distance of the laser beams, and sharpens the images of the LV-0181. It facilitates laser irradiation to and positioning of rear sides where no light is illuminated and small detecting parts.



Applicable objective lens :LV-0150A(5×)/LV-0151A(10×)/ LV-0152A(20×)
Irradiation method :Coaxial epi-illumination by white LED cold-light
Number of pixels :300,000 pixels of more
Cable length :1.5 m (standard), 3 m (when the exclusive extension cable* in used.)
Light emitting part :Illumination by white LED cold-light
Control :Variable adjustment
Operating temperature range :0 to 40°C
 (with no condensation)
Operating humidity range :30 to 80 %RH
(with no condensation)
Input voltage :AC 100 V to 240 V 50/60 Hz
Consumption voltage :3.5 VA when AC 100 V/
9.0 VA when AC 240 V


*Exclusive extension cable :Supplied as standard


Measurement system of vibrating micro object




Mounting the LV-0181 (built-in positioning camera), the LV-0185 (illumination unit) and an objective lens to the LV-1800 enables micro spotting of laser beams and image observation by epi-illumination. It makes laser positioning to microstructures and detection of multipoint parts possible.





Magnet stand

製品写真(LV-0030 大型マグネットスタンド)

90-degree beam bending mirror LV-0301

製品写真(LV-0301 90度反射ミラー)

Needle type beam bending mirror

製品写真(LV-0105 細型反射ミラー)


Fine-positioning XY stage

製品写真(LV-0015 XY軸微動ステージ)


製品写真(LV-0017A 大型三脚)

Fine-positioning Z stage

製品写真(LV-0016 Z軸微動ステージ)

Objective lens(10×) LV-0151A


製品写真(LV-0151A 対物レンズ)

It enables the laser spot to be focused to approximately 3µm.

Measurement distance:approx. 40 mm

Benchtop vibration isolator (auto-leveling type)

製品写真(LV-0200 卓上除振台)

The LV-0200 is a benchtop type vibration isolator using air suspension. It can isolate the sensor from background vibration transmitted from the floor to improve detection accuracy. The top plate is an SUS plate on which the LV-0030 can be mounted. Auto-leveling feature keeps the level horizontal position even when the load is not even.

A regulator with filter is provided as standard.

Outer dimensions: 500 x 600 x 56 mm
Maximum load weight: 120 kg
Weight: approx. 29 kg
Leveling mechanism: Operated using 0.3 to 0.7 MPa pressurized air or nitrogen gas.

Benchtop vibration isolator (manual-leveling type)

製品写真(LV-0201 卓上除振台)

The LV-0201 is a benchtop type vibration isolator using air suspension. It can isolate the sensor from background vibration transmitted from the floor to improve detection accuracy. The top plate is an SUS plate on which the LV-0030 can be mounted.

Outer dimensions: 500 x 600 x 56 mm
Maximum load weight: 120 kg
Weight: approx. 29 kg
Leveling: Hand pump

Steel plate

製品写真(LV-0018 スチールプレート)

By mounting this plate on the LV-0017A tripod, the LV-0030 magnet stand can be used on the tripod. (use horizontally)

Adapter for tripod

製品写真(LV-0019 カメラネジアダプタ)

Adapter for connecting a sensor to a tripod directly.

Storage trunk

製品写真(LV-0300 キャリングケース)





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