求翻译：衍射光栅光限制器是一种用以防止532nm波长的倍频YAG激光损伤眼睛的限制器，其结构如图6.5所示。在两个聚焦透镜之间夹放置一块石英（或玻璃）光栅，输出光处放置一个小直径的圆孔光阑，自然光下有一定透明度；强光照射下，光栅将产生多阶衍射光，高阶衍射光被光阑挡住，只让中心的零阶衍射光通过。光栅可设计成零阶衍射光输出为零的，则在强光入射下只有很弱的光输出，从而保护眼睛不受损伤。是什么意思？

The diffraction grating optical limiter is a way to prevent the 532nm wavelength multiplier yag laser eye damage limiter structure as shown in Figure 6.5 as shown. Folder to place a quartz (or glass) grating, the output light by placing a small diameter circular aperture between the two focusing len

diffraction grating is used optical limiter is used to prevent a 532 nm wavelength laser damage multipliers YAG restrictions of the eyes, with the structure, as shown in Figure 6.5 . In the two focusing lens placed between a piece (or quartz, and glass) raster output light by placing a small diamete

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Optical limiter is a diffraction grating to prevent double frequency YAG laser 532nm wavelength limit of eye injury, its structure as shown in Figure 6.5. In two clips between the focusing lens to put a piece of quartz (or glass) grating, the output light by placing a small-diameter round Kong Guang

The diffraction grating light killer is one kind uses to prevent 532nm the wave length the frequency multiplication YAG laser damages the eye the killer, its structure as shown in Figure 6.5.Clamps the laying aside together quartz between two focusing lens (or glass) the diffraction grating, an outp