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The absolute value scale, with different slit patterns engraved according to position, is captured at high speed with a high-resolution CMOS sensor. This world’s first detection principle delivers the highest accuracy in its class with no tracking errors during high-speed movement. This innovative system was created based on KEYENCE’s newly developed technology. High-intensity illumination from HL-LEDs reliably emits light through the absolute value scale to a high resolution CMOS.