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提出一种利用全息复合光栅制作连续变化分束器的方法，这种全息分束器（ＨＢＳ）容易制作，特别适用于大景深全息所需要的多光束照明。
A holographic composite grating is proposed to fabricate a continuously variable beam splitter. The holographic beam splitter (HBS) is easy to fabricate and is particularly suitable for multi-beam illumination required for large depth of field holograms.