时代农机
時代農機
시대농궤
Hunan Agricultural Machinery
2015年
7期
29-30
,共2页
焦距仪%玻罗板%刻划间隔%图解法
焦距儀%玻囉闆%刻劃間隔%圖解法
초거의%파라판%각화간격%도해법
focometer%porro board%line interval%graphic methods
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.
玻囉闆是焦距儀測量焦距的基準元件.在用分析放大率法測量光學透鏡焦距的測量精度的基礎上,根據光電式焦距儀探測器的讀數精度與接收範圍,推導瞭焦距儀設計時玻囉闆刻線間距與被測光學繫統焦距關繫的錶達式,製作瞭錶達其關繫的S-F圖,提齣瞭一種用S-F圖設計玻囉闆的圖解方法. 這種方法簡單、直觀,設計方便.
파라판시초거의측량초거적기준원건.재용분석방대솔법측량광학투경초거적측량정도적기출상,근거광전식초거의탐측기적독수정도여접수범위,추도료초거의설계시파라판각선간거여피측광학계통초거관계적표체식,제작료표체기관계적S-F도,제출료일충용S-F도설계파라판적도해방법. 저충방법간단、직관,설계방편.
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 onS-F figure,which is simple,visual and easy to design.