For faster navigation, this Iframe is preloading the Wikiwand page for
Stigmatism.
Stigmatism
Optical term
Look up stigmatism in Wiktionary, the free dictionary.
In geometric optics, stigmatism refers to the image-formation property of an optical system which focuses a single point source in one phase optics space into a single point in image space. Two such points are called a stigmatic pair of the optical system. Many optical systems, even those exhibiting optical aberrations, including astigmatism, have at least one stigmatic pair. Stigmatism is applicable only in the approximation provided by geometric optics. In reality, image formation is, at best diffraction-limited, and point-like images are not possible due to the wave nature of light.
This browser is not supported by Wikiwand :( Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience. Please download and use one of the following browsers:
Your input will affect cover photo selection, along with input from other users.
X
Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?
Oh no, there's been an error
Please help us solve this error by emailing us at support@wikiwand.com
Let us know what you've done that caused this error, what browser you're using, and whether you have any special extensions/add-ons installed.
Thank you!