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Contrast enhancement in widefield CARS microscopy by tailored phase matching using a spatial light modulator

机译:通过使用空间光调制器量身定制的相位匹配,可增强广域CARS显微镜的对比度

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We introduce a widefield CARS microscope implementation that uses a spatial light modulator to obtain extremely precise control over the pump/probe-beam incidence geometry, which provides the possibility to enhance the image contrast at specific target resonances by fine-tuning the incidence angles. We show how this technique can be used to optimize the image contrast between objects of different size and to practically eliminate the undesired signal from the solvent that embeds small target specimens. Changing the numerical aperture of the illumination from 1.27 to 1.24 improved the ratio of the signals of 500nm polystyrene beads and the agarose solvent by about 20 dB.
机译:我们介绍了使用空间光调制器的宽视野CARS显微镜实施方案,该泵实现了对泵浦/探针束入射几何结构的极其精确的控制,从而可以通过微调入射角来增强特定目标共振时的图像对比度。我们展示了如何使用此技术来优化不同大小的对象之间的图像对比度,并实际消除嵌入小目标样品的溶剂产生的不良信号。将照明的数值孔径从1.27更改为1.24可将500nm聚苯乙烯珠和琼脂糖溶剂的信号比提高约20 dB。

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