默认灯光太暗了，需要添加更多的光源，将下面灯泡样的图案拖到预览图上。设置全光源。

Step 7 The default light is too dark. You need to add more light sources by dragging the lamp icon to the preview box. Set its type to Omni.

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对各种LED光源和光学会聚系统进行了对比测试，并对其聚光性能进行了分析，设计了一种全内反射透镜（TIR透镜）结构。

This paper comparably tests different LED light source and optical convergence system, analyzes the condensing performance and designs the structure of TIR lens.

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光源激励和光信号检测，是全光纤硅谐振传感器的两项关键技术。

Source exciting and optical signal detecting are two technical barriers to the all fiber optic resonant sensor.

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