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.
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