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本文从一条光线入射到具有一定厚度的平面镜上后会发生多次反射和折射情况入手,讨论了各条出射光线强弱的特点,发现其中一条相较于其它出射光线很强。随后,从数学上导出了该条光线对成像质量影响的计算公式,并从数值上证实,当考虑玻璃厚度时,平面镜所成的像不再是理想像。文中还讨论了为什么平时照镜子时却并没有发现有明显的像模糊现象,还给出了当玻璃厚度大于一定量时,也会出现像模糊现象。
In this paper, we start with the reflection and refraction of a light after it has been incident on a plane mirror with a certain thickness. The characteristics of the emergent light intensity are discussed and one of them is found to be stronger than the other emergent light. Subsequently, the formula for calculating the influence of the light on the image quality was mathematically derived and numerically verified that the image of the plane mirror is no longer an ideal image when considering the thickness of the glass. The article also discusses why the usual mirror does not find a clear phenomenon like blur, but also gives the glass when the thickness is greater than a certain amount, it will appear like blur.