condensing lens

Theory of design and development of condensing lens type large aperture Fresnel lens

聚光镜型大口径菲涅耳透镜的设计理论和研制

The surgery of rhegmatogenous retinal detachment under indirect ophthalmoscope with no hand-held condensing lens

无手持聚光透镜间接检眼镜下视网膜脱离手术

Since these rays do not actually meet, they cannot form an image without a condensing lens of sort. A planoconvex lens used to concentrate light.

由于这些光线实际上不相交，如果不用某种会聚透镜的话，它们是不能成像的。

Objective To investigate the surgical method and clinical effect of surgery for primary retinal detachment under indirect ophthalmoscope with no hand-held condensing lens.

目的探讨无手持聚光透镜间接检眼镜下进行原发性（孔源性）视网膜脱离复位手术的方法及其效果。

A more integrated theory of design and analysis has been established for the sake of developing the condensing lens type large aperture Frensnel lens.

建立了一套较完整的大口径聚光镜型菲涅耳透镜设计和分析理论。