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变焦物镜有着广泛的用途,在靶场它可将瞄准目标的照片或模型成象于一定距离的屏幕上,通过变倍,屏幕上的象即由小变大,或由大变小,模拟目标的远近变化。但是屏幕上象的无规则跳动以及时而清晰、时而模糊的现象,使室内模拟不符合野外实际情况,影响训练效果。当用它作为摄象镜头拍摄运动目标时,物镜需要连续调焦变距,这时由于变距过程中物镜光轴的不规则晃动,势必导致屏幕上目标运动轨迹的失真。因此,有必要分别将变距、变倍过程中象面的晃动量测试出来。测试中所用的仪器设备有:0.5″准线检查仪,测量显微镜,百分表,可调支架若干,并
Zoom objective lens has a wide range of uses, in the shooting range it can target a photo or model of the image on a certain distance from the screen, by zooming, the image on the screen from small to large, or from large to small, to simulate the target Change far and near. However, the irregular beating of the screen as well as the clear and sometimes obscure phenomena on the screen make the indoor simulation not in conformity with the actual situation in the field and affect the training effect. When using it as a camera lens to shoot moving targets, the objective lens needs continuous focusing and variable pitch. At this moment, the irregular movement of the optical axis of the objective lens during the changing process will inevitably lead to the distortion of the target moving track on the screen. Therefore, it is necessary to change the distance, zoom in the process of shaking the image plane out. Equipment used in the test equipment: 0.5 "alignment tester, measuring microscope, dial indicator, a number of adjustable bracket, and