摘要
光斑尺寸法是数字光盘信息存储中的典型聚焦误差探测方法。本文推导了误差信号和离焦量关系的理论公式 。
Spot size detection method is representative method to obtain a focus error digital optical disk storage system.This paper deduces the theory formula between FES (focus error signal)and defocus,and using the formula we work out the computer emulation figure about the relation head system of different interval of three-segmentation detector.This paper analyzes the relation between interval of segmentations and detection sensitivity and linear range,and also discusses the cause why the method needs two detectors.
出处
《激光杂志》
CAS
CSCD
北大核心
2001年第2期36-37,39,共3页
Laser Journal
