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基于时间展宽技术,设计研制了大面积阴极分幅变像管。借助Matlab编程分别对单磁透镜和双磁透镜像管在离轴空间分辨率和像场畸变等方面特征作了数值模拟,并采用阴极微带光刻分辨率板进行测试验证。实验测试显示,在缩小一倍成像下,双透镜像管在离轴9 mm以内的空间分辨率优于5 lp/mm。相比单透镜像管,双透镜像管具有更高的空间分辨率,更大的有效成像范围以及更小的成像畸变。因而,采用双透镜成像能够有效地提高像管的空间分辨能力,可为分幅相机性能的进一步提升提供新的思路。
Based on the time broadening technology, a large area cathode cathode ray tube was designed and developed. With Matlab programming, the characteristics of single-lens and double-magnetic lens tube in the off-axis spatial resolution and image field distortion were numerically simulated and tested by the cathode microstrip lithography resolution board. Experimental tests show that the spatial resolution of a two-lens tube is better than 5 lp / mm within 9 mm of the off-axis at reduced double imaging. Compared with single-lens tube, double-lens tube has a higher spatial resolution, a larger effective imaging range and smaller imaging distortion. Therefore, the use of dual-lens imaging can effectively improve the spatial resolution of the image tube, and provide a new idea for the further improvement of the performance of the framed camera.