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小孔成像作为大家所熟知的一种光学现象,是光的直进性的有力证据,但“小孔成像”的“像”到底是什么,这一直是一个颇有争议的问题,不少资料(如《物理教学》1987年第11期、《物理教师》1992年第9期等)上认为这本不是像,而是影。现笔者就此谈点浅见。关于像的概念,母国光等所编的《光学》是这样定义的,“自物点发出的光束,经光学系统后若仍保持为单心光束,则这个经过系统后的光束的心称为光学系统对该物点成的像点。”由于物点所发出的光束性质是随物点的表面情况(起伏性、光洁度及颜色等)的不同而不同的,亦即由物点发出的光携带了该物点情况的
Small hole imaging is a well-known optical phenomenon and it is a strong proof of the straightness of light. However, what is the “image” of “hole imaging”? This has always been a controversial issue. (For example, “Physics Education”, No. 11, 1987, “Physics Teachers”, No. 9, 1992), it is considered that this is not an image, but a shadow. Now the author talks briefly. As for the concept of image, the definition of “optics” by Mother Guoguang et al. is defined as “If the light beam emitted from the object point remains a single-core beam after passing through the optical system, the heart of this beam passing through the system is called The point at which the optical system forms a point on the object.” Because the nature of the beam emitted by the object point is different depending on the surface conditions (undulation, finish, and color, etc.) of the object point, that is, the light emitted by the object point. With the condition of the object