Laser Displacement Sensor
- Dynamic measurements of displacement up to 50 kHz
- Static measurement of DC component and geometry
- High accuracy
- Different measurement ranges
- Visible red type class 2 laser
- Calibration by user possible
- Measurement of the reflected light intensity
- Good cost-performance ratio
- Ideal for loudspeaker measurements
The Distortion Analyzer equipped with a laser displacement sensor becomes a powerful vibrometer providing dc and ac components of up to 50 kHz. The laser sensor gives access to the mechanical domain, simplifies the T/S parameter measurement and is the basis for the vibration and radiation analysis. Only a laser sensor based on the triangulation principle measures the dc component of the displacement reliably, which is a very valuable symptom for loudspeaker nonlinearities. This dc capability is also the basis for scanning the geometry of a radiator.
A variety of laser sensor heads is provided to get optimal performance in the particular application.
It is recommended to use coating spray for micro-speakers and tweeters with transparent and shiny diaphragms. More information.
Specification
KLIPPEL Modules Using a Laser Sensor
Standard Measurements Requiring a Laser Sensor
Voice coil displacement
Scanning mechanical vibration
DC displacement – dynamic offset the voice coil
Scanning geometry
Small signal lumped parameters
Transducer nonlinearities (curve shape)
Single-valued nonlinear parameters
Rub & Buzz and impulsive distortion
Compression of fundamental components
Vibration analysis
Material parameters of loudspeaker parts
Area of radiation
Waveform and spectrum
Impulse response
Magnitude and phase response
Directional radiation characteristics
Radiation analysis
Harmonic distortion
Intermodulation distortion
Accelerated life and power testing