摘要
玻罗板是焦距仪测量焦距的基准元件。在用分析放大率法测量光学透镜焦距的测量精度的基础上,根据光电式焦距仪探测器的读数精度与接收范围,推导了焦距仪设计时玻罗板刻线间距与被测光学系统焦距关系的表达式,制作了表达其关系的S-F图,提出了一种用S-F图设计玻罗板的图解方法。这种方法简单、直观,设计方便。
Porroboard is used as base element by focometerto measure focal length.On the basis of analysis onthe measurement of the measurement accuracyofthe focal lengthof optical lensaccordingmagnification method,we deduced an expression expressing the relationship between the porro boardline intervaland the focallensof the measured focal systemwhen designing focometer according to the reading accuracy and acceptable limits of photoelectric focal length detector,and worked out S-F figure which could express their relation.And put forward a graphic methodfor thedesign of porrobased on S-F figure,which is simple,visual and easy to design.
出处
《时代农机》
2015年第7期29-30,共2页
Times Agricultural Machinery
基金
湖北省过程控制与先进装备制造协同创新中心项目
关键词
焦距仪
玻罗板
刻划间隔
图解法
focometer
porro board
line interval
graphic methods
