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出典:Wikipedia
出典:『Wikipedia』 (2010/07/22 03:21 UTC 版)
An erect image, in optics, is one that appears right-side up. Some telescopes and other devices, such as the camera obscura present an inverted image. Various means are used to achieve an erect image. A common example of an erect image is the image of a person in a standard plane mirror.
Erect image