焦度计综述
Lensometer
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摘要: 介绍各种国产焦度计的原理,对国外自动焦度计作了较为详细的叙述.对目视式焦度计、投影式焦度计和自动焦度计的结构和工作原理分别作了详细的介绍,最后论述了各种焦度计的主要特点及优缺点.Abstract: The application and principle of various kinds of domestic-made lensometers are described. Some automatic lensometer from abroad are also discussed in considerable detail. The structure and working principle of the visual type lensometer,projection lensometer and automatic lensometer are presented separately.The main characteristics and advantages of all kinds of lensometer are introduced.