Saiki Takao, Hosobata Takuya, Kono Yukihiro, Takeda Masahiro, Ishijima Ayumu, Tamamitsu Miu, Kitagawa Yutaro, Goda Keisuke, Morita Shin-Ya, Ozaki Shinobu, Motohara Kentaro, Yamagata Yutaka, Nakagawa Keiichi, Sakuma Ichiro
Opt Express. 2020 Oct 12;28(21):31914-31922. doi: 10.1364/OE.400679.
We present sequentially timed all-optical mapping photography (STAMP) with a slicing mirror in a branched 4f system for an increased number of frames without sacrificing pixel resolution. The branched 4f system spectrally separates the laser light path into multiple paths by the slicing mirror placed in the Fourier plane. Fabricated by an ultra-precision end milling process, the slicing mirror has 18 mirror facets of differing mirror angles. We used the boosted STAMP to observe dynamics of laser ablation with two image sensors which captured 18 subsequent frames at a frame rate of 126 billion frames per second, demonstrating this technique's potential for imaging unexplored ultrafast non-repetitive phenomena.
我们提出了一种顺序定时全光映射摄影（STAMP）方法，该方法在分支4f系统中使用切片镜，在不牺牲像素分辨率的情况下增加帧数。分支4f系统通过放置在傅里叶平面中的切片镜将激光光路在光谱上分离成多个路径。切片镜由超精密端铣工艺制造，有18个不同镜面角度的镜面小平面。我们使用增强型STAMP，通过两个图像传感器观察激光烧蚀的动力学过程，这两个传感器以每秒1260亿帧的帧率捕获了18个连续帧，证明了该技术在成像未探索的超快非重复现象方面的潜力。
