光刀一般指激光刀具，利用激光的特点进行聚焦，在聚焦点光斑的能量密度极高，足以使任何物体的表面熔化甚至气化，象刀具一样切削材料。
... photokeratoscope 照像角膜镜 photo knife 光刀（激光手术刀） photokymograph 记录照像机，光转筒记录器 ...
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提出一种利用高斯光束柱面反射展成法生成光刀的新方法，并导出了光刀几何参数的预估算式。
A novel method for propagating light-knife by the reflection of Gaussian laser beam at a cylinder is put forward and the formula to appraise the geometry parameters of light knife is also derived.
应用电镜技术观察了刀额新对虾复眼的形态结构以及光、暗适应对其超微结构的影响。
The outside shape of Metapenaeus ensis and its ultrastructure under light and dark adaptation was studied by electron-microscopy technology.
在外旅游或者没有电源的情况下，便携式光伏发电箱可以实现手机、手电筒、剃须刀等能量补给及夜晚照明。
Portable solar power box allows energy supplies of mobile phones, flashlights, razors and night lighting in case there is no power when travelling.
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