iC-Haus (Bodenheim, Germany) has developed sensor chips for optical position encoders using photodiodes designed especially for blue light. The new iC-PT H-Series chips combine optimized scanning and signal interpolation in a flat 5 x 5 mm² optoQFN package with a plane window. Due to the optimized Phased-Array structure of the opto-chips, a minimal scanning area of only 1.9 mm x 3.1 mm is sufficient to generate 10,000 pulses per revolution using a code disc of only 26 mm diameter, for example. The blue light LEDs increase contrast with lower noise. The shorter wavelength and penetration of blue- light photons improve the resolution, signal amplitude, harmonic distortion, and jitter performance of incremental and absolute encoders.
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