Synchronous Detection to Reduce Offsets in Focus Error of an Optical Pickup Unit
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DOI: 10.1109/tim.2020.3016072
Abstract: The optical pickup unit (OPU) is an optical assembly, which is used for reading and writing digital optical disks. It consists of a laser diode, quadrant photodetector, and other optical components to maintain focus. This… read more here.
Keywords: pickup unit; optical pickup; synchronous detection;