The LV-2100 Laser Interference Displacement Meter is a [Displacement meter], and the LV-1700 series Laser Doppler Vibrometer is a [Velocity meter]. Also, their detection theories are different.

 

The LV-2100 Laser Interference Displacement Meter demodulates the amplitude displacement (m) from the number of the laser light interference fringe, obtained by a light projecting and receiving of the target object. While on the other hand, the LV-1700 series Laser Doppler Vibrometer irradiates the modulated laser light to the target object, and demodulates the amplitude velocity (m/s) from the doppler shift frequency made by the reflective light of the target object which is in the amplitude condition.

 

The LV-2100 Laser Interference Displacement Meter can detect the amplitude displacement including the DC (offset). It can measure the piezoelectric element or cantilever of the rectangular drive. Also, it can detect the amplitude displacement accompanied by offset with the resolution of 0.155 Nm.

The LV-1700 series Laser Doppler Vibrometer needs the integration processing to obtain the displacement (m). It can obtain the alternating current component (AC), but it cannot obtain the DC component (offset) with the integration processing.