弯月形

分析fθ透镜的光学系统设计方面的一些问题，叙述由多片分离的弯月形透镜构成的超广角大口径fθ镜头的设计。

Some design problems in an optical system with f θ lens are analysed , and the design of super wide angle and large aperture f θ lens which consists of separate multi element meniscus lenses is described .

树脂镜片的镀膜分析弯月形厚透镜的基点和基面

Analysis on Coating of Colophony Eyeglass The cardinal point and cardinal plane of lune thick-lens

在浅地层剖面图上，海底管道具有较强能量的弯月形绕射特征。

On the sub-bottom profiling , the pipeline 's reflection has strong diffraction which shows " Crescent-shaped " .

横向剖面的观察结果表明，随着冲压次数的增加，翅片横向截面由长方形逐渐向弯月形变化。

From the transverse section observations , with the mould pressing times increasing , the fin transverse sections of ' rectangle ' shape become ' meniscus ' shape .

分析结果表明，当抽运光输入振幅超过临界抽运光输入振幅时，信号光出现聚焦且信号光束面在演化过程中由圆形逐渐演化为弯月形。

When the input amplitude of pump beam exceeds the critical amplitude , the probe beam begins to focus , and its spot size gradually becomes a crescent moon shape .

用非对称介质厚透镜基点位置公式讨论了弯月形厚透镜基点位置对透镜系统参数的依赖关系；

The cardinal point formula of thick lens of unsymmetrical medium has been derived . The relation between the cardinal points of the lune thick lens and the lens parameters has been reviewed .