Mirror Ray Tracing镜面光线追踪
Mirror ray tracing is similar to lens ray tracing in that rays parallel to the optic axis and through the focal point are used. A third useful ray is that through the center of curvature since it is normal to the mirror and retraces its path backward. 镜面光线追踪与透镜光线追踪类似，都使用与光轴平行并通过焦点的光线。另一条有用的光线是通过曲率中心的光线，因为这条光线与镜面垂直，并在反方向上重trace其路径。
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Index Mirror concepts 索引镜像概念 | ||
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Convex Mirror Image凸面镜成像
A convex mirror forms a virtual image.The cartesian sign convention is used here. 凸面镜形成虚像。这里使用笛卡尔符号约定。
 Using a ray parallel to the principal axis and one incident upon the center of the mirror, the position of the image can be constructed by back-projecting the rays which reflect from the mirror. The virtual image that is formed will appear smaller and closer to the mirror than the object. 利用一条平行于主轴的入射光线和一条经过镜面中心的光线，可以通过反向投影反射光线来确定像的位置。形成的虚像将比物体更小且更靠近镜面。
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Concave Mirror Image凹面镜成像
If the object is outside the focal length, a concave mirror will form a real, inverted image. The cartesian sign convention is used here. 如果物体位于焦点之外，凹面镜将形成一个实像，且像与物体方向相反。这里使用的是笛卡尔符号约定。
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Concave Mirror Image凹面镜成像
If an object is placed inside the focal length of a concave mirror, and enlarged virtual and erect image will be formed behind the mirror. The cartesian sign convention is used here. 如果一个物体放在凹面镜的焦距以内，会在镜后形成放大且正立的虚像。这里使用的是笛卡尔符号约定。
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