Laser Doppler Vibrometer

LV-1800

Unceasing evolution is deepening non-contact vibration measurement.

The LV-1800 Laser Doppler Vibrometer is a non-contact vibrometer that achieves more than 10 times higher sensitivity compared to conventional products through a newly designed interference optical system, and also allows for confirmation of the laser irradiation position using a built-in camera.
In recent years, small ultrasonic actuators using piezoelectric elements, as well as mobile phones, smartphones, and digital cameras incorporating MEMS (Micro Electro Mechanical Systems), have become widespread. In the automotive sector, inverters and peripheral devices used in EVs/HEVs vibrate at frequencies exceeding 20 kHz. However, existing contact-type Accelerometer, which are widely used for vibration detection, have difficulty measuring vibrations in the ultrasonic range of minute components.
By using the non-contact LV-1800, vibrations can be detected quickly and easily. Furthermore, by combining it with a waveform analysis device (FFT analyzer), it becomes possible not only to measure vibrations but also to capture, visualize, and analyze the vibration state with high precision.

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Non-contact vibration/velocity measurement seminar useful for evaluating electric products

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Laser Doppler Vibrometer Measurement Examples

		LV-1800
Detection and demodulation method		Optical heterodyne detection	Speed recovery
Laser light	Light source	He-Ne laser	λ = approx. 633 nm
	Injection power	1 mW less than
	Laser safety standards	Laser Class 2	*Please refer to the applicable standards.
	Minimum laser spot diameter	Approximately 20 µm or less	At focal position 100 mm φ=1/e²
	Minimum laser spot diameter	3 µm or less (when LV-0151B is installed)	WD = approximately 38.8 mm
Standard lens	Variable focus	100 mm to 10 m (∞)
	Distance scale	100 mm to 10 m (∞)	Interferable distance mark included
	Attachment size	M22 x 0.5, depth 5.5 mm
Built-in camera for positioning LV-0181 (optional)	Attachment	Built-in sensor	Built-in at the time of shipment *Can be installed later by picking up the item.
	Interface	USB 2.0	Output from the USB mini-B connector of the conversion unit.
	Image sensor	CMOS color 1/4-inch
	Pixel count	Approximately 300,000 pixels
	Image size	VGA	640×480
	Frame rate	30 frames/second
	Minimum imaging range	10 mm × 7.5 mm (TYP)	WD = 100 mm (shortest)
	Minimum imaging range	2.1 mm × 1.6 mm (TYP)	LV-0151B when objective lens is attached
	Imaging position	Erect image when facing the indicator surface (rotatable)
	Exposure	automatic
	White balance	automatic
	Gain	automatic
	Operating environment	Windows® 10/11	Display True Color 24-bit or higher
	Camera focus	Adjustment with the objective lens	Laser spot and confocal
Detection unit suspension	Suspension screw holes	Back part x 1	M8, depth 8 mm *Compatible with LV-0030 large magnetic stand.
		Side part x 1
		Side part x 2	M4, depth 5 mm
	Tripod setup	Using LV-0019 camera screw adapter	Option
Demodulation sensitivity monitor	Signal Level Indicator	10-segment LED array display	Linked to the conversion unit level indicator display.
Demodulation sensitivity monitor	ERROR indicator	LED display (red)
Signal cable	Cable length	3 m	Winding and storage in the conversion section
	Thickness	φ = 10.5 mm
	Covering	Oil-resistant coating
	Minimum bending radius	R=40 mm or more
External dimensions of the detection unit	Width	53 mm	Excluding protrusions
	Height	52.5 mm
	Depth	152.5 mm
Weight of the detection unit		約750 g	With option (LV-0181) equipped / Cable not included

		LV-1800
Detection speed	Frequency range	0.3 Hz to 3 MHz (fc = -3dB) *Common to all speed ranges 0.001 (m/s)/V (optional) 0.3 Hz to 200 kHz (fc = -3 dB)
	Maximum detection speed	10 m/s _0-p (20 m/s _pp)
	Minimum velocity resolution	0.3 µm/s or less (at 0.01 (m/s)/V)	0.05 µm/s or less (when LV-0800 is installed)
	Output	±10 V (20 V _pp)	When input impedance is 100 kΩ or higher
		Amplitude vs. Output Voltage Polarity	When approaching the sensor, a positive voltage is detected.
		DC Offset	Within 20 mV
		Output Impedance	50 Ω
		Minimum input impedance	100 kΩ or more
		Connector type	BNC (C02 type)
Speed range	1.0 (m/s)/V	10 m/s _0-p (20 m/s _pp)
	0.1 (m/s)/V	1 m/s _0-p (2 m/s _pp)
	0.01 (m/s)/V	0.1 m/s _0-p (0.2 m/s _pp)
	0.001 (m/s)/V (optional)	0.01 m/s _0-p (0.02 m/s _pp) *See LV-0800 Micro-Speed Range Board for details.
	Over-indicator	LED (red) lights up when detection speed exceeds the upper limit +5%.
Demodulation sensitivity monitor	Signal Level Indicator	20-segment LED array display	Linked to detection unit level display
	MONITOR output	0-10 V
		Output Impedance	50 Ω
		Minimum input impedance	100 kΩ or more
		Connector type	BNC (C02 type)
	ERROR indicator	LED (red) indicator light
High-pass filter (HPF)		100 Hz	fc = -3dB
High-pass filter (HPF)		OFF (0.3 Hz)	fc = -3dB
Low-pass filter (LPF)		50 kHz	fc = -3dB *Cannot be selected when using the 0.001(m/s)/v range.
		100 kHz
		1 MHz ^*
		OFF (3 MHz)
Positioning video output (option)	Video output	digital
	Standard	USB 2.0
	Display	LED (white) lit	*When LV-0181 is attached
	Connector type	USB mini-B type
Laser radiation control	Turn ON/OFF using the front panel switch.	The laser emission start specification upon power-on (panel mode) is available as a factory setting.
	Laser ON indicator	LED (green) during laser emission
	Light-blocking shutter	Contact input	Opening the contacts stops laser emission.
		Connector type	Receptacle: RM12BRB-2S
		Connector type	Plug: RM12BPE-2PH (short-circuited)
Storage device	Detection unit housing	Stored in the conversion section
Storage device	Cable storage	Winding and storage in the conversion section
Outline drawings	Width	410 mm	Excluding each protruding part
	Height	120 mm
	Depth	324 mm
Weight		約8.1 kg	Includes sensor cable
Operating Temperature Range		0 to 40 degrees Celsius
Operating humidity range		30-80%RH	However, condensation should not occur.
Storage temperature range		-10 to 50°C
Input voltage		AC 100～240 V
Input voltage		50/60 Hz
Power consumption		60 VA
Cooling method		Natural air cooling (vibration-free cooling)

		LV-1800
Applicable standards	Laser safety	IEC 60825-1:2007:2014
		EN 60825-1:2007:2014/A11:2021
		FDA (CDRH) 21CFR 1040.10 and 1040.11 except for conformance with IEC 60825-1 Ed.3., as described in Laser Notice No. 56
	CE marking	Low Voltage Command	2014/35/EU	Standard EN 61010-1 EN 60825-1
		EMC directive	2014/30/EU	Standard EN 61326-1
		RoHS Directive	2011/65/EU	Standard EN IEC 63000

Target amplitude: Polarity of the output voltage

<Resolution and Dynamic Range Evaluation Conditions>
LPF: 100 kHz ON
Maximum recovery time using corner cubes
FFT analyzer power spectrum observation
1 kHz range, 1 kHz, 2048 lines, 256 averaging cycles
*Please refer to the graph for the frequency characteristics of each filter.
LV-0181 Positioning built-in camera image size
Relationship between working distance and spot diameter

The LV-0121A digital displacement meter is equipped with a digital displacement output. By using the LV-0930 displacement analysis software, the vibration amplitude detected by the LV-1800 + LV-0121A digital displacement meter can be output via USB 2.0 as a digital displacement value (m) with a maximum sampling rate of 1 MHz and a resolution of 0.155 nm, and analyzed. The LV-0930 displacement analysis software allows for conversion from displacement (m) to velocity (m/s) and acceleration (m/s²), as well as analysis such as moving average, differential calculation, and FFT analysis without signal degradation. Various waveform conversions and analysis results can be output in CSV format. The CSV data can be imported into spreadsheet software or the Oscope series of time-series data analysis tools for further data processing.

High resolution 0.155 nm (digital output)
1 MHz high-speed sampling
Digital displacement output (USB 2.0)
Analog output DC to 100 kHz

Evaluation of displacement amplitude including DC offset
Measurement of minute displacements in MEMS and piezoelectric elements
Evaluation of objects that are displaced in a rectangular shape
Displacement evaluation of cantilever structures such as relays.
Displacement evaluation of air cylinders and actuators

Connector type: USB 2.0, mini-B type on the device side.
Image sensor: 1/4-inch CMOS color sensor
Pixel count: 300,000 pixels or more
Image size: VGA (640 x 480)
Frame rate: 30 frames/second
Shooting range: 10 mm × 7.5 mm and up (measurement distance 100 mm and up)
Functions: Exposure/Gain/White Balance (Automatic)
Operating environment: Standard support for Windows® 10/11
Display: True Color 24-bit or higher
Camera focus: Shared with laser beam focus
Accessories: LV-0181 Camera Monitor software CD-ROM
USB cable (CF-0703) 1.5 m

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

LV-0112 Displacement Output Board / LV-0111 Acceleration Output Board

Signal source: LV-1800 receives speed signal internally.
Output voltage: ±10 V (MAX)
DC offset: within 20 mV
Maximum amplitude: 10 times each setting range (0-p)
Amplitude conversion error: within ±5%
Amplitude output polarity: + voltage when approaching the sensor side.

LV-1800 Setting range	Displacement setting range
LV-1800 Setting range	1 Hz to 20 kHz	10 Hz to 50 kHz	1 kHz to 200 kHz
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-1800 Setting range	Acceleration setting range
LV-1800 Setting range	1 Hz to 2 kHz	1 Hz to 20 kHz	100 Hz to 400 kHz
1.0(m/s)/V	10 ³ (m/ ^s²)/V	10 ⁵ (m/ ^s²)/V	10 ⁷ (m/ ^s²)/V
0.1(m/s)/V	10 ² (m/ ^s²)/V	10 ⁴ (m/ ^s²)/V	10 ⁶ (m/ ^s²)/V
0.01(m/s)/V	10 ¹ (m/ ^s²)/V	10 ³ (m/ ^s²)/V	10 ⁵ (m/ ^s²)/V

Compatible lenses: LV-0150B (5x) / LV-0151B (10x)
LV-0152B (20x)
Illumination method: White cold coaxial epi-illumination using LED
Pixel count: 300,000 pixels or more
Cable length: 1.5 m (when using the included extension cable)
Light source: Cool light illumination using white LEDs
Control: Variable adjustment
Operating temperature range: 0 to 40°C (non-condensing)
Operating humidity range: 30 to 80% RH (but no condensation)
Input voltage: AC 100 V to 240 V 50/60 Hz
Power consumption: 3.5 VA at AC 100 V / 9.0 VA at AC 240 V

The LV-0383 three-dimensional microscope unit is a three-dimensional microscope optical unit for Laser Doppler Vibrometer. Combining three Laser Doppler Vibrometer and a microscope, it enables non-contact detection of vibrations of minute objects occurring in three axial directions. Coaxial reflected illumination and two digital video cameras with different magnifications (optional) allow for quick and accurate positioning and still image recording. It enables evaluation of the three-dimensional behavior of MEMS (Micro Electro Mechanical Systems), microstructures, small-mass objects, and ultrasonically driven objects whose vibrations are difficult to detect using contact methods.

Objective lens LV-0150B

Magnification: 5x
WD: 36.1 mm
Spot diameter: ⌀4 μm or less
Conversion adapter included
Objective lens LV-0151B

Magnification: 10x
WD: 38.8 mm
Spot diameter: ⌀3 μm or less
Conversion adapter included
Objective lens LV-0152B

Magnification: 20x
WD: 22.5 mm
Spot diameter: ⌀2.5 μm or less
Conversion adapter included
Large Magnetic Stand LV-0030

This is a dedicated magnetic stand for sensor suspension. The cross clamp allows for flexible laser irradiation. When combined with the LV-0015/0016 fine-adjustment stage, it enables precise adjustment of the detection position.
Slim 90-degree reflective mirror LV-0105

Converts the tip of the LV-0301 90-degree reflective mirror to ⌀ 4 mm. Rod tip diameter: ⌀ 4 mm
90-degree reflective mirror LV-0301

By attaching this to the lens tip of the LV-1800, the laser beam can be bent 90 degrees and rotated 360 degrees. A mirror can be placed in the gap to detect objects in hard-to-reach places. Rod tip diameter: ⌀10 mm
XY axis fine adjustment stage LV-0015

When combined with the LV-0030 large magnetic stand, it allows for precise positioning in the X and Y directions. It can also be used alone for sample positioning.
Stage surface: 60 x 60 mm
Travel amount: ±6.5 mm
Z-axis fine adjustment stage LV-0016

When combined with the LV-0030 large magnetic stand, it allows for precise vertical movement. This makes it easy to focus and position laser beams and images.
Stage surface: 60 x 60 mm
Travel amount: 0 to 13 mm
Steel plate LV-0018A

It can be used as a base for the LV-0030 large magnetic stand on the tripod head or on a non-magnetic desk. Additionally, by directly securing the LV-0015/0016 fine-adjustment stage with screws, you can prevent the stage or sensor from falling.
Camera screw adapter LV-0019

This is an adapter for attaching the LV-1800 sensor to the tripod head (1/4-inch screw) of a large tripod.
Large tripod

This is used for mounting sensors and stands in locations where a surface plate is not available. Please use it together with the LV-0018A steel plate and the LV-0019 camera screw adapter.
Storage Trunk LV-0350

This trunk can store the LV-1800 unit and other optional accessories such as a large magnetic stand.
Items that can be stored
• LV-1800 × 1 / • LV-0030 (+LV-0015/0016) × 1 / • Objective lens × 2 / • LV-0185 × 1 / • LV-0018A × 1
Liquid measurement jig (made to order)

This jig is designed for efficiently irradiating and receiving laser light inside a liquid. Two types are available: a tube type and a quartz rod type suitable for solvents. Direct attachment to the sensor or separate suspension of the jig only is also available.
*Please contact us separately for further details.