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Laser Displacement Sensors from KEYENCE

CCD Laser Displacement Sensors

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Operating Principle

The CCD laser displacement sensor uses a triangulation measurement system. Conventional laser displacement sensors employ a PSD as the light-receiving element. However, the LK Series uses a CCD as the light-receiving element. The light reflected by a target passes through the receiver lens and is focused on the PSD or CCD. The PSD uses the light quantity distribution of the entire beam spot entering the light receiving element to determine the beam spot center and identifies this as the target position. However, the distribution of light quantity is affected by the surface condition of the target, causing variations in measured values. The CCD detects the peak value of the light quantity distribution of the beam spot for each pixel and identifies this as the target position. Therefore, the CCD enables stable highly accurate displacement measurement, regardless of the light quantity distribution of the beam spot.

Light quantity distribution of beam spot on light-receiving element
COmparison of PSD and CCD type laser sensors
LK-G Series LK-G Series

Laser Displacement Sensor

 LK-2500 Series LK-2500 Series

Laser Displacement Sensor
6 sensor-heads are available with the newly-developed algorithm and 2 types of optical systems. Ultra-long range laser displacement sensor capable of measuring with 50-μm resolution at distances up to 750 mm (29.5 in).
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