optical encoders, photodiodes, silicon photodiodes, line drivers, injection molding, optical encoders, light emitting diodes, led products, light therapy, qphase, rotary encoders, absolute, incremental, hollow shaft, warp 10, snap-lite, spectra-life, optolab, shadow technology, interdigitated sensing technology , barneveld, wisconsin

the quantum devices product lne includes application specific silicon photodiodes, optical encoders and light emitting diodes (led) for commercial, industrial and medical applications. qdi's photodiodes and led's are used in instrumentation for photosynthesis and photobiological research, biomedical and medical instrumentation for measuring blood sugar levels (glucometer), oxyhemoglobin and pulse rate (pulse oxymeter).