A real image is the collection of focus points actually made by converging rays, while a virtual image is the collection of focus points made by extensions of diverging rays. Source Wikipedia
In optics, an image is defined as the collection of focus points of light rays coming from an object. Source Wikipedia
Optics: real images vs virtual images and focus points Gallery Tutorial TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model Section Slide kind SysML Block Definition Diagram (BDD)
