Inoptics, anerect image is one that appears right-side up. Animage is formed whenrays from a point on the original object meet again after passing through an optical system. In an erect image, directions are the same as those in the object, in contrast to an inverted image. It is one of the properties of images formed in aplane mirror.Sometelescopes and other devices such as thecamera obscura present an inverted image on the viewing surface.Mirrors andcompound prism elements can be used to achieve an erect image instead.
