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docs:become [2020/04/22 15:27] pklapetek |
docs:become [2020/04/22 15:28] pklapetek |
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| //periodic NFFF// in the next text. | //periodic NFFF// in the next text. | ||
| In most of the graphs here we show complete diffraction pattern. | In most of the graphs here we show complete diffraction pattern. | ||
| - | However, if we are interested in the maximum in some diffraction order direction, it is much simpler and it seems that this is the preferably used approach - we calculate the far field value only at the diffraction order maximum. Luckily enough, this value is dependent on the aperture only, which constructs the envelope for the diffraction pattern, so in this case one could work only with a single aperture. However, to construct the diffraction pattern is a good way how to debug the problem. | + | However, if we are interested in the maximum in some diffraction order direction, it is much simpler and it seems that this is the preferably used approach - we calculate the far field value only at the diffraction order maximum. Luckily enough, this value is dependent on the aperture only, which constructs the envelope for the diffraction pattern, so in this case one could work only with a single aperture. However, to construct the diffraction pattern is a good way how to debug the problem. The schematics of |
| + | the calculations is here: | ||
| + | |||
| + | {{:docs:schematics.png?600|}} | ||
| A comparison of the different evaluation methods is shown below, also showing the first | A comparison of the different evaluation methods is shown below, also showing the first | ||
| Line 28: | Line 32: | ||
| periodic calculation (based on a single motive) where the far field is evaluated from three | periodic calculation (based on a single motive) where the far field is evaluated from three | ||
| and nine virtual repetitions are then compared to the case where the calculation is not periodic | and nine virtual repetitions are then compared to the case where the calculation is not periodic | ||
| - | and three apertures are physically existing in the computational domain. The schematics of | + | and three apertures are physically existing in the computational domain. |
| - | the calculations is here: | + | |
| - | + | ||
| - | {{:docs:schematics.png?600|}} | + | |
| An important message is that | An important message is that | ||
docs/become.txt · Last modified: 2020/04/24 12:27 by pklapetek
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