在几何光学作图题中，确定通过光学元件所成其像的观察范围，是常考题型．但多数学生解题时感到很棘手，究其原因，主要是未掌握其成像观察范围的规律．笔者在高中物理教学实践中，对其规律进行了初步探讨．高中物理课程中涉及的光学元件包括：平面境、球面境（凹面镜、凸... In the geometrical optical drawing problem, the observation range defined by the optical element is often used. However, most students find it difficult to solve problems. The main reason is that they do not grasp the rule of their imaging observation range. In the practice of high school physics teaching, the author conducted a preliminary discussion of its laws. The optical components involved in the high school physics course include: plane environment, spherical environment (concave mirror, convex...