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Pronunciation varies by accent · noun
(optics) A lens that has been corrected for spherical aberration and coma in order to produce a rectilinear image..
2009, Gérard René Lemaitre, Astronomical Optics and Elasticity Theory, Springer, Astronomy and Astrophysics Library, Corrected 3rd printing, page 11, […] which is totally false since he established the algebraic conditions for thin-lens achromatic aplanats;
For comparison, an aplanat of a focus catalogued at 16 inches, actually found by experiment to have a focus of 16 11-16 inches, was used.
Some infra-red detectors are sold already embedded in a plastic aplanat.
Use aplanat when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Aplanat means (optics) A lens that has been corrected for spherical aberration and coma in order to produce a rectilinear image..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
2009, Gérard René Lemaitre, Astronomical Optics and Elasticity Theory, Springer, Astronomy and Astrophysics Library, Corrected 3rd printing, page 11, […] which is totally false since he established the algebraic conditions for thin-lens achromatic aplanats;
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