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来自目标的光通过透镜系统并在焦平面上形成图象,例如,相机胶片上的图片。图片形成的同时,我们希望知道相机瞄准时的确切方位,所以我们确立电影径纬仪和相机瞄准轴同标准垂线的关系。为了测定瞄准轴同垂线的关系,并在胶片上记录它,我们引进一个点光源的光束,反射它使其离开完全水平的反射表面后,通过一标线或十字线而产生标线的图象,把光束和标线图象分成四个部分光束和图象,并用可以避免仪器机械误差的光学偏向装置把这四束光线和图象投射到相机中。每一部分光束和标线图象在图片上指准一标记作为瞄准轴准确垂线的关系。换句话说,用四束光线和图象之间的中心测定准确的瞄准轴。
Light from the target passes through the lens system and forms an image on the focal plane, for example, a picture on a camera film. At the same time as the image was formed, we wanted to know exactly where the camera was aiming, so we established the relationship between the film axis and the camera’s aiming axis to a standard vertical. In order to determine the relationship of the aiming axis to the perpendicular and to record it on the film, we introduce a light beam from a point source that reflects the reticle to produce a reticle through a reticle or reticle, after it has been reflected off of a perfectly horizontal reflective surface The beam and reticle images are split into four partial beams and images and the four beams of light and the image are projected into the camera with an optical deflection unit that avoids mechanical errors in the instrument. Each part of the beam and the reticle image point on the picture with a marker as an accurate perpendicular to the axis of sight. In other words, the accurate aiming axis is measured with the center between the four beams and the image.