The key was bending the light the optimal amount, enough that it enters the solar panel at an angle, but not so much of an angle that the light reflects off and is lost.

这其中关键在于折射最理想数目的光线，也就是让尽量多的光线转到能进入太阳能板的入射角度，而使尽量少的光线处于被反射掉的入射角度。

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The bending Angle increases with an increase of the energy density.

增加能量密度，板料的弯曲角度显著增大。

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The results show that: the springback Angle of bent tube increases with the bending Angle, the gap between mandrel and tube, and the hardening coefficient, but decreases with the hardenability value.

结果表明：回弹角随弯曲角、芯棒与管壁间隙及材料硬化系数的增大而增大，随材料硬化指数的增大而减小。

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