Stigwall Johan, Bengtsson Jörgen
Opt Express. 2004 Nov 15;12(23):5675-83. doi: 10.1364/opex.12.005675.
Building on the optimal-rotation-angle method, an algorithm for the design of inter-element coherent arrays of diffractive optical elements (DOEs) was developed. The algorithm is intended for fan-out DOE arrays where the individual elements fan-out to a sub-set of points chosen from a common set of points. By iteratively optimizing the array of elements as a whole the proposed algorithm ensures that the light from neighbouring elements is in-phase in all fan-out points that are common to neighbouring DOEs. This is important in applications where a laser beam scans the DOE array and the fan-out intensities constitute a read-out of information since the in-phase condition ensures a smooth transition in the read-out as the beam moves from one DOE to the next. Simulations show that the inter-element in-phase condition can be imposed at virtually no expense in terms of optical performance, as compared to independently designed DOEs.
基于最佳旋转角度方法，开发了一种用于设计衍射光学元件（DOE）的元件间相干阵列的算法。该算法适用于扇出式DOE阵列，其中各个元件扇出到从一组公共点中选择的一个点子集。通过迭代地整体优化元件阵列，所提出的算法确保来自相邻元件的光在相邻DOE共有的所有扇出点处同相。这在激光束扫描DOE阵列且扇出强度构成信息读出的应用中很重要，因为同相条件可确保光束从一个DOE移动到下一个DOE时读出的平滑过渡。模拟表明，与独立设计的DOE相比，元件间同相条件的实现几乎不会在光学性能方面付出代价。
