anastigmat

American  

[uh-nas-tig-mat, an-uh-stig-mat] / əˈnæs tɪgˌmæt, ˌæn əˈstɪg mæt /

noun

Optics.

1. a compound lens corrected for the aberrations of astigmatism and curvature of field.

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anastigmat British  

/ æˈnæstɪɡˌmæt, ˌænəˈstɪɡmæt /

noun

1. a lens or system of lenses designed to be free of astigmatism

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Etymology

Origin of anastigmat

1885–90; < German, back formation from anastigmatisch anastigmatic

Example Sentences

For those, however, who wish even greater efficiency and capabilities, we supply the anastigmat lens equipments.

From Project Gutenberg

This is an advantage which will appeal strongly to many, as it enables one to utilize to the fullest extent the microscopic definition of his anastigmat lens.

From Project Gutenberg

In a true anastigmat, it is entirely eliminated.

From Project Gutenberg

But an anastigmat lens can be so corrected as to permit the use of larger diaphragm openings and still produce sharp, clear negatives.

From Project Gutenberg

This larger opening admits more light within a given time than that of the R. R. lens, hence the anastigmat is much faster.

From Project Gutenberg