A new synchronization control circuit based on FPGA for the laser range-gated imaging system

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2009,（4）
• 页码范围: 248-250
• 页数: 3页
• 语种: 英文
• DOI: 10,1007/s11801-009-9006-x

摘要

Synchronization control is a kernel technique of the laser range-gated (LRG) imaging system which controls the synchro-nization of the pulsed laser and the ICCD camera directly. It can achieve range gating effectively and improve the resolution of image precisely. Conventional control circuits which are composed of discrete components have a poor performance of anti-interference, and the transmitting signal has a-bad delay which affects the conventional circuit's precision and stabili-zation seriously. To solve these problems, a range-gated synchronization control circuit is designed. This circuit, which takes the advantages of FPGA's high compact and flexibility, uses the phase-locking-loop (PLL) to multiply the global clock frequency. This design improves the precision and stabilization greatly, makes the precision up to a nanosecond level and provides a real-time selection of the values of pulse width and delays. Experiments results indicate that this circuit has a high precise and stable range-gated pulse.