恒比定时在激光扫描成像系统中的应用

With the laser imaging technology, laser ranging is used in aircraft guidance, target three-dimensional reconstruction, terrain measurement and so on. Laser ranging has become a research hotspot.This article describes the principle and application of constant fraction discriminator (CFD) which is a key technology in the laser ranging system. Based on engineering practice, LC circuit is designed to replace the transmission delay line to delay the echo signal, and TTL level comparator is used to reduce power consumption. This design makes lots of modifications to the traditional design. This improves the precision and reliability of the timing point to a large extent. This can optimize the imaging results.