【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
题图是用CCD记录数字全息图的示意图。根据CCD记录的数字全息图,用衍射积分重建物平面光波场是数字全息的基本数据处理过程。由于CCD面阵尺寸通常甚小于物体,在物体邻近CCD时不满足傍轴近似条件。令物体是边宽为a的方形薄板,物体到CCD面阵的距离为d,光波长为λ。将物体的四个角点到CCD面阵中心传播角谱的相位畸变小于1弧度视为采用傍轴近似的条件,试导出采用菲涅耳近似时a,d,λ应满足的关系。
![](https://cdn.shuashuati.com/imgs/94782cbf0d45bec5a63767f22297cb18.jpg)
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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参考答案:
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参考解析:
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