求翻译：为了考察4种光栅压低零级散射光强的能力，设计光栅深度，我们推导了这几种光栅的光栅深度公式和零级衍射透射率公式[7]，所得结果列于表6.4。是什么意思？

In order to investigate the four kinds of grating to suppress the zero-order scattering light intensity is the ability to design the grating depth, we derive several grating grating depth formula and zero-order diffraction transmission rate formula [7], the results are shown in Table 6.4.

In order to study such a grid 4 low level-zero scattered light intensity, depth, and raster design we derived from the few raster, raster and zero-depth formula diffraction transmission rate formula [ 7], the results in table 6.4 .

In order to inspect 4 kind of diffraction gratings to reduce the zeroth order scattering luminous intensity ability, the design diffraction grating depth, we have inferred these kind of diffraction grating diffraction grating depth formula and zeroth order diffraction transmittance formula (7), the

In order to visit 4 grating suppress the ability of zero-order scattering light intensity, depth design gratings, we derived these types of grating transmission rate and zero-order diffraction grating depth formula formula [7], the results are presented in table 6.4.

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