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根据胶片图象形式的不同,转镜相机可分为两类,即扫描摄影机和分幅摄影机。由于它们各有利弊,因此,最好的方法是能用一台摄影机,同时得到现象的扫描和分幅图象。国际上有美国的330A型相机,但它采用空间光路,三面体铍转镜及整体充氦技术,这就给技术、工艺带来许多困难。本文根据我国的具体情况,提出了一种新颖方案来同时实现分幅、扫描,它包括以下内容: 采用两层共面光路可实现同时分幅扫描。研究了几种可能的等待形式,以尽量减少整体尺寸,入口角,增大光力,提高象质。同时,进行了结构优选,对空间光路的实现方式作了比较研究,给出了光学系统的设计参数。 实验中,首先采用了高强度铝合金六面体转镜。用弹性力学理论,对六面体铝转镜的强度及变形进行了精确计算,证明其变形量仅为同样回转半径三面体铍转镜的1.45倍,边缘线速度达816m/s。此外,对铝转镜进行了强度及变形实验,实验结果表明:其性能与理论相符,满足役计要求。 采用了国内较成熟的真空球罩技术,与充氦气相比,大大降低了成本。
Depending on the format of the film image, the rotary mirror cameras can be divided into two categories: scanning cameras and framing cameras. Because of their advantages and disadvantages, the best way to do this is to be able to use a single camera to get both scanned and framed images of the phenomenon. The United States has the international 330A-type camera, but it uses the spatial light path, the three-dimensional beryllium turn mirror and the overall charge helium technology, which gives the technology, technology has brought many difficulties. According to the specific situation in our country, this paper proposes a novel scheme to realize the framing and scanning at the same time. It includes the following content: The simultaneous two-layer optical path can be used to scan at the same time. Several possible forms of waiting were studied to minimize the overall size, entrance angle, increase light power, and improve image quality. At the same time, the optimization of the structure of the optical path is made, and the design parameters of the optical system are given. Experiment, the first high-strength aluminum alloy hexahedral mirror. Using the theory of elasticity, the strength and deformation of the hexahedral aluminum mirror are calculated accurately, which shows that the deformation is only 1.45 times of that of the trinoclinic mirror with the same radius of gyration and the speed of the edge reaches 816m / s. In addition, the strength and deformation of the aluminum mirror were tested, the experimental results show that: its performance in line with the theory to meet the service requirements. Adopted the more mature vacuum dome technology, compared with helium filling, greatly reducing costs.