Digital light-in-flight recording by holography is a powerful tool for observing ultrashort light pulse propagation as a motion picture. However, the recordable time of the technique has been limited by the lateral length of the image sensor used for the recording of the hologram, and no technique for extending the recordable time has been reported yet. Then, to extend the recordable time of digital light-in-flight recording by holography, we proposed a technique that records two holograms as a single hologram using double reference light pulses with an image sensor. In this technique, the image sensor is spatially divided into multiple micro-areas. Each micro-area consists of $2\times1$ pixels and records 1 pixel of each of the two holograms. We employed a polarization-imaging camera in order to implement the proposed technique to extend the recordable time. This technique is a new application of the polarization-imaging camera. We experimentally succeeded in extending the recordable time for the first time using the proposed technique. Specifically, we recorded the motion picture of the ultrashort light pulse propagation for 1.04 ps.

中文翻译：

---

使用偏振成像相机通过全息记录飞行中数字光记录的可记录时间延长

全息数字光在飞行记录是观察超短光脉冲传播作为电影的有力工具。然而，该技术的可记录时间受到用于记录全息图的图像传感器的横向长度的限制，并且尚未报道延长可记录时间的技术。然后，为了通过全息术延长数字飞行中光记录的可记录时间，我们提出了一种技术，该技术使用图像传感器使用双参考光脉冲将两个全息图记录为单个全息图。在该技术中，图像传感器在空间上被划分为多个微区域。每个微区由 $2\times1$ 个像素组成，并记录两个全息图中的每一个的 1 个像素。我们采用了偏振成像相机来实现所提出的技术来延长可记录时间。该技术是偏振成像相机的新应用。我们首次使用所提出的技术通过实验成功地延长了可记录时间。具体来说，我们记录了 1.04 ps 的超短光脉冲传播的电影。