Laser Doppler Vibrometers

A Laser Doppler Vibrometer (LDV) is a highly specialised instrument that measures vibration velocity without making any physical contact with the object. It works on the principle of the Doppler effect: a laser beam is directed at a surface, and the vibration of that surface causes a slight frequency shift in the reflected light. The LDV measures this frequency shift to calculate the velocity and displacement of the object.

Application:

• Non-Contact Measurement: Ideal for measuring the vibration of lightweight, small, or delicate objects where attaching a sensor would change the properties of the system.
• Remote Sensing: Used to measure vibrations on hot, dangerous, or inaccessible surfaces, such as the inside of an engine or a high-speed rotating component.
• Biomedical Research: Applied in fields like otology to measure the tiny vibrations of the eardrum or in dentistry to analyse the vibration of dental tools.