Displacement sensor handles challenging surfaces
A
Keyence (UK) product story
Edited by the Engineeringtalk editorial team
Jul 9, 2008
Precise, stable measurements can be easily and accurately obtained on any type of surface or material, including black rubber, translucent and transparent targets and reflective or mirrored surfaces.
The LK-G laser displacement sensors from Keyence provide a repeatability of 0.01 um, accuracy of +/-0.03% and a 50kHz sampling speed.
LK-G sensors offers stability with fast moving, rotating, or vibrating targets, as well as with in-line applications requiring data averaging.
Precise, stable measurements can be easily and accurately obtained on any type of surface or material, including black rubber, translucent and transparent targets and reflective or mirrored surfaces.
LK-G Sensors use a dedicated Linearised CCD (Li-CCD), developed by Keyence for sensor applications.
The CCD provides the position of light within a pixel to achieve accuracy that is two times higher than conventional models.
Additionally, the LK-G design achieves a speed that is 25 times faster with a sensitivity ten times higher than conventional systems.
Keyence has also developed a new light-receiving unit to concentrate reflected light onto the Li-CCD.
A newly developed high-accuracy Ernostar lens system drastically reduces spot distortion caused by aberrations.
A highly rigid die-cast body reduces deviations caused by temperature change.
Keyence's Able (active balanced laser control engine) technology senses target surface conditions and adjusts the laser light intensity to an optimal level.
This provides a 13,000 times wider range of light intensity than previously possible.
With Able, LK-G performance is unaffected by reflections, colour or surface coatings.
An RPD (real peak detection) algorithm, developed by Keyence, cancels the diffused light caused by laser beam reflections inside translucent targets.
RPD makes it possible to obtain accurate measurements on translucent targets like plastic and PCBs, as well as transparent materials such as LCD cover glass and a range of glass materials.
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