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DGP—Ⅱ A型多光谱摄影机(见图版Ⅱ—②)是在DGP—Ⅱ型的基础上改进研制的,改进后的摄影机添加了波段灰标打印装置,可对每个波段的每张画幅打印上一个十级的波段灰标。此外改用镜间快门,保证了像面曝光均匀性。整个仪器由检影器、摄影机、电气箱三个单元组成。工作时检影器、摄影机分别占据飞机一个窗口。地物目标的图像可由检影器的投影屏直接观察,并通过调整链轮的速度直接测出飞机的速高比值,根据判读的要求,在两种重叠率中选择所需的值后即可进行拍摄,这时由检影器
DGP-Ⅱ A multi-spectral camera (see Figure Ⅱ-②) is based on the DGP-Ⅱ-based improved development, the improved camera added a band gray scale printing device, each band can be printed for each frame On a ten band gray scale. In addition to use the mirror shutter, to ensure the image plane exposure uniformity. The entire instrument from the retinoscopy, video cameras, electrical boxes composed of three units. Gynecological camera, camera occupy a window of the aircraft respectively. Geographical object image can be directly observed by the projection screen retinometer, and by measuring the speed of the sprocket directly measured the speed ratio of the aircraft, according to the interpretation of the requirements in the two overlap rate after the desired value can be selected Shooting, then by the retinoscopy