Abstract We report on a novel layout providing variable zoom in digital in-line holographic microscopy (VZ-DIHM). The implementation is in virtue of an electrically tunable lens (ETL) which enables to slightly shift the illumination source axial position without mechanical movement of any system component. Magnifications ranging from ~15X to ~35X are easily achievable using the same layout and resulting in a substantial variation of the total field of view (FOV). The performance of the proposed setup is, first, validated using a resolution test target where the main parameters are analyzed (theoretically and experimentally) and, second, corroborated analyzing biological sample (prostate cancer cells) showing its application to biomedical imaging.

中文翻译：

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可变变焦数字在线全息显微镜

摘要我们报告了一种在数字在线全息显微镜 (VZ-DIHM) 中提供可变变焦的新型布局。该实施依靠电可调透镜（ETL），其能够在没有任何系统部件的机械移动的情况下略微移动照明源轴向位置。使用相同的布局很容易实现从 ~15X 到 ~35X 的放大倍率，并导致总视场 (FOV) 的显着变化。所提出的设置的性能首先使用分辨率测试目标进行验证，其中分析了主要参数（理论上和实验上），其次，证实了分析生物样本（前列腺癌细胞），显示其在生物医学成像中的应用。