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角度放大率,是一个和光学仪器相关的物理概念.一般教科书(1)—(3)在讨论各种光学仪器(包括天文望远镜、单显微镜及复显微镜)的角度放大率时,多数只推导成像在最小明视距离,即D=25厘米及在无穷远时的值.这种片面的处理方法,有两个缺点.首先是课文与实际应用情况不配合,因为当我们使用这些光学仪器时,成像的像距没理由受限制为两个定值.经验告诉我们,像距其实可以选取与眼球距离超过25厘米的任何值.其次是人为的把角度放大率分割成两个不相连的值,用原理基本上是一样的方
Angle magnification is a physical concept associated with optical instruments. General textbooks (1)-(3) When discussing the angular magnification of various optical instruments (including astronomical telescopes, single and multiple microscopes), most of them only deduced the imaging At the minimum photopic distance, ie, D=25 centimeters and at infinity, this one-sided approach has two drawbacks. The first is that the text does not match the actual application, because when we use these optical instruments, There is no reason for imaging imagery to be limited to two sets of values. Experience tells us that the image distance can actually choose any value that is more than 25 centimeters away from the eyeball. Second is the artificial division of the angular magnification into two disjoint values. The principle is basically the same