What are the domestic and international EMC (electromagnetic compatibility) standards for ophthalmic OCT (Optical Coherence Therapy)?

Ophthalmic optical coherence tomography (OCT) scanners must comply with GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international) EMC standards. Their core is a low-coherence interferometry system, comprising an ultrafast scanning light source (e.g., the swept-frequency laser in SS-OCT), a high-speed photodetector, and a precision optical scanning galvanometer. These components are highly sensitive to electromagnetic interference. Standards require that the scanned images be artifact-free when the equipment is operating near nearby radio frequency equipment (e.g., Wi-Fi). The laser's drive power supply must have extremely low noise, and the photodetector's analog front-end must have an extremely high signal-to-noise ratio. In the design, the scanning galvanometer's drive signal lines should use shielded cables, and the detector output should be analog filtered and equipped with low-noise operational amplifiers.