© 光学成像原理 Objective “Lens” Focal length “Object Plane” “Image Plane” -W Magnified Light Object is placed image win 1 and 2fof Source the objective lens 1st image 11 1 M= v-f v and L f 焦距越短，放大倍数越大，而透镜直径又越小 材料科学与工程学院 11 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering 光学成像原理 11 焦距越短,放大倍数越大,而透镜直径又越小