An Ultra-High-Speed Electro-Optical Framing Camera and Its Application
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摘要: 采用高精度、低像差的光学分幅技术，结合高精度延时控制及超快门选通微通道板(MCP)轮替曝光技术，以及CCD图像采集方法，研制了高性能的超高速光电分幅相机，其摄影频率为2×108幅/秒，像面空间分辨率为36mm-1，可连续拍摄8幅1600×1200像素的大画幅图像。将该相机应用于钨丝发光实验和雷管破裂实验，获得了清晰的实验图像。Abstract: We developed an ultra-high-speed electro-optical framing camera using high precision and low aberration optical subdivision, high precision delay, ultra-fast microchannel plate (MCP) exposure shutter and CCD image data acquisition system, with its performance indicators as the following:its image spatial resolution is 36mm-1, its frame size is 1600×1200, and it can capture eight images with the photography frequency of 2×108 frame/s.Using this camera, we successfully obtained clear images of the luminescent process of the tungsten wire and the rupture process of the detonator.
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Key words:
- photoelectronic imaging /
- digital camera /
- high speed photography /
- frame
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图 1 超高速光电分幅相机原理图
Figure 1. Schematic of ultra-high-speed electro-optical framing camera
图 3 分光系统的调制传递函数(a)和像面畸变曲线(b)
Figure 3. Modulation transfer function (a) and image plane distortion curve (b) of splitting system
图 5 超高速光电分幅相机实物图
Figure 5. Photograph of actual ultra-high-speedelectro-optical framing camera
图 6 钨丝发光图像(曝光时间为5ns)
Figure 6. Luminescent process of the tungsten wire (5ns of exposure time)
图 7 雷管破裂图像(曝光时间为30ns)
Figure 7. Rupture process of the detonator (30ns of exposure time)
表 1 4种超高速光电分幅相机性能比较
Table 1. Performance comparison of four different ultra-high-speed electro-optical framing camera
Camera Frames Photography frequency/(108frame/s) Pixel number Shortest exposuretime/(ns) Shortest timespan/(ns) Spatial resolution/(mm-1) Image quality Anti-electromagnetic interference ability SIMX (UK) 8 20 1360×1024 1 50(System) No ghost HSFC-PRO(Germany) 4 2 1280×1024 5 1 50(MCP) Ghost General Shenzhen University 8 1 1367×1035 10 15(System) Ghost Weak This study 8 2 1600×1200 5 1 36(System) No ghost Strong 
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