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Utilizing a newly developed CCD as the light-receiving element and a 32-bit ultra-high speed RISC processor for signal processing, the LK series provides highly accurate measurement regardless of target surface properties. The LK-031 delivers a resolution of 1 µm and linearity of ±0.1% of F.S. Visible laser beam spot of 30 µm diameter KEYENCE's unique optical system minimizes lens aberration to give the LK-031 a minimum spot diameter of 30 µm. This enables the surface contour of a target to be accurately measured. Stable measurement of various target surfaces The patent-pending LFTC circuit enables measurement of multicolored or patterned targets. Low reflective targets, such as black rubber, can be measured without additional adjustment. · Linearity of ±0.1% of F.S. (All models) · Resolution of 1 µm (LK-031) · 30 µm diameter beam spot (LK-031) · Measurement unaffected by color, surface texture or stray light The CCD laser displacement sensor uses a triangulation measurement system. Conventional laser-displacement sensors employ a PSD (Position Sensitive Detector) 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 that focuses the light on the PSD or CCD. PSD-type sensors use the light quantity distribution of the entire beam spot on the PSD to determine the beam spot center and identify 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 pixel where the peak value of the light quantity distribution of the beam spot 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. Here are two links for additional information. http://www.bdi-czech.cz/dokumenty/pdf/chapter10/lk.pdf http://world.keyence.com/products/displace/lk/lk.html · Question feel free to e-mail me at John@Linghunt.com |