此模具拥有液压缸压缩、二次浇口注射，以及锥面与导柱的二次定位等特点，能够准确地保证塑料透镜的精度。
The mold employed fluidcylinder, secondary gate, secondary locating with pyramidal face and guide pillars, which ensured the precision of the plastic aspheric lens.
建立了一种大功率LED的封装结构，二次光学设计采用了微透镜阵列技术，运用光线追踪法研究了这种封装结构的光学性能。
A packaging structure of high-power LED was presented, microlens array was employed in the secondary optical design, optical properties of the package was studied using Trace pro.
研究了二次抛物线型的GRIN球透镜的光线轨迹方程序；得出其轨迹为椭圆曲线及一些重要结论。
At last, the author obtained the equation of ray trace in the GRIN ball lens with the index profile which is quadratic and drew some important conclusions.
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