首页>
外国专利>
Focus detection emitter, electronic data storage device, electron beam focus adjustment method, and electron beam focus determination method
Focus detection emitter, electronic data storage device, electron beam focus adjustment method, and electron beam focus determination method
展开▼
机译：焦点检测发射器，电子数据存储装置，电子束焦点调整方法和电子束焦点确定方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A focus-detecting emitter for a data storage device is provided, such focus-detecting emitter including a first emission zone configured to selectively produce a first electron beam portion, and a second emission zone configured to selectively produce a second electron beam portion. The first electron beam portion generates a first spot on a storage medium and the second electron beam portion generates a second spot on the storage medium such that a position of at least one of the first spot and the second spot is indicative of a focus state of at least one of the first electron beam portion and the second electron beam portion.
展开▼
