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在普通全息图中,照相胶片用非散射参考光束记录从待成象物散射的单色光的干涉图样,然后用同样的参考光束照明已显影的全息胶片,产生原物的虚象。本文将介绍一种如何用分子共振来记录不同时刻到达的光信号间的干涉图样,以及用这种技术产生时间分辨全息图。根据光从物传到全息图的时间,用定时参考脉冲,可选择性地记录全息象。作者用这种方法对半透明屏后的物成象,并指出如何用类似方法来检查嵌在稠密散射介质中的“物”。这种方法最终可能用于肿瘤医学成象。现在让我们来考虑图1所示的入射在全息
In conventional holograms, the photographic film records the interference pattern of monochromatic light scattered from the imaged object with a non-scattering reference beam and then illuminates the developed holographic film with the same reference beam to produce a virtual image of the original. This article describes how to use molecular resonance to record interference patterns between optical signals arriving at different times and to produce time-resolved holograms using this technique. Holograms can be selectively recorded with timed reference pulses based on the time the light travels from the object to the hologram. In this way, the author images the translucent screen and shows how similar methods can be used to check for “objects” embedded in dense scattering media. This method may ultimately be used for oncology imaging. Let us now consider the incident hologram shown in Figure 1