公开(公告)号：US5299035A

公开(公告)日：1994-03-29

申请号：US857546

申请日：1992-03-25

申请人： Emmett N. Leith ,  David S. Dilworth ,  Hsuan S. Chen ,  Ye Chen ,  Joaquin L. Lopez ,  Janis A. Valdmanis

发明人： Emmett N. Leith ,  David S. Dilworth ,  Hsuan S. Chen ,  Ye Chen ,  Joaquin L. Lopez ,  Janis A. Valdmanis

IPC分类号： G03H1/00 ,  G03H1/04 ,  G03H1/02 ,  G03H1/08

CPC分类号： G03H1/041 ,  G03H1/00 ,  G03H2222/33 ,  Y10S359/90

摘要： An image of an object embedded in a diffusing medium is formed by propagating a coherent or equivalent light pulse through the diffusing medium and applying a reference pulse so as to gate precisely the first emerging light transmitted through the diffusing medium. An ultra-short pulse, having a duration on the order of 150 fs, insures that only the first emerging light is used to form a hologram. Instability in the diffusing medium, which may be inherent therein, as is the case with living tissue, or artificially induced therein, such as by vibrating the specimen, ensures that a subsequent hologram has a different background noise and speckle pattern. Integration of such holograms causes the background noise to average out, but time-invariant features, such as the object being imaged, become increasingly more visible as more holograms are integrated.

摘要翻译： 嵌入漫射介质中的物体的图像通过传播相干或等效的光脉冲通过漫射介质并施加参考脉冲来形成，从而准确地对通过漫射介质传播的第一出射光进行栅极输入。 具有大约150fs的持续时间的超短脉冲确保仅使用第一出射光来形成全息图。 与生物组织的情况一样，或其中人为诱导的扩散介质中的固有的不稳定性，例如通过振动样本，确保随后的全息图具有不同的背景噪声和斑点图案。 这种全息图的集成导致背景噪声平均化，但是随着更多的全息图被集成，时间不变特征（例如被成像的对象）变得越来越可见。