英和和英

名詞

aplanat (複数形 aplanats)

1. (optics) A lens that has been corrected for spherical aberration and coma in order to produce a rectilinear image.
   • 1894, W. K. Burton, The Zeiss Anastigmatic Lenses, Julius F. Sachse (editor), American Journal of Photography, Volume XV, page 4,

     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.

   • 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;

   • 2014, J. F. James, An Introduction to Practical Laboratory Optics, Cambridge University Press, page 171,

     Some infra-red detectors are sold already embedded in a plastic aplanat.