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像的视场,系观察者通过光学器件所观察到物的完整像的空间范围。本文拟以平面镜和透镜为例,采用作图方法确定像的视场并总结其规律,供同志们教学参考。一、平面镜 1、像点视场如图1所示,利用平面镜成像的规律,易知物点S的虚像点为S′。又据单一平面镜成像的唯一性可知,由物点S所发出的任意光线,经平面镜的反射光线,其反向延长线均应汇交于S′,显然,在二维空间里,观察者的眼睛若在由MM′和NN′两条边界反
The field of view of the image is the spatial extent of the complete image of the object observed by the observer through the optics. This paper intends to use plane mirrors and lenses as examples, using mapping methods to determine the field of view of the image and summarize its laws for reference by comrades. First, the plane mirror 1, like the point of view of the field of view shown in Figure 1, the use of the law of planar mirror imaging, easy to know the point S of the virtual image point S ’. According to the uniqueness of the single plane mirror imaging, any light rays emitted by the object point S, reflected by the plane mirror, and their opposite extension lines should meet at S′. Obviously, in the two-dimensional space, the viewer’s If the eye is on the boundary between MM′ and NN′