| zhchqphchz |
2007-02-07 22:56 |
物理光學(xué)的模擬問(wèn)題
進(jìn)行物理光學(xué)的模擬時(shí)，采用gaussian size＋angle模式，選項(xiàng)x－width，y－width與x－size，y－size有啥區(qū)別啊，我理解后者指的是光束的大小，那前者又是啥呢，難道是sampling時(shí)的間距？ t(- 5l
英文解釋如下，看了N次，還是不理解 The X- and Y-Width are measured in lens units. The larger the width, the more empty space around the portion of the beam with non-zero intensity there will be. This space is called the guard band, and it is vital that sufficient empty space exist around the beam. The empty space allows room for the beam to expand as aberrations are introduced to the beam. If portions of the beam get too close to the edge of the array, they will "alias" and reflect back into the beam, decreasing the accuracy of the computed results. 4?7 OP
t6
還望高手指點(diǎn) +]# p m9
先謝了
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