Design of optical system for monitoring coating status of micro-sphere at real-time

An optical system was designed. It can be applied in monitoring the real-time bouncing status of ICF target micro-sphere with 0.2~1.0 mm in diameter. A ring Light Emitting Diode (LED) for specific illumination was designed, and through the Petzval objective system, the micro-sphere was imaged onto the CCD with details resolution. Video detection system by personal computer captured and disposed every video image. Monitoring the real-time status of micro-sphere was realized and the coating efficiency improved greatly. The optical system had very good image quality, with the maximum spot diameter on-axis and off-axis of 12.6 μm and 15.8 μm, respectively. The fields were uniform and had high resolution. Particularly, the field curvature less than 15 μm and the distortion less than 0.012% f