Optics.
an eyepiece consisting of two plano-convex lenses, the plane sides of which both face the eye.
[ 1830-40; named after C. HUYGENS ]
Optics.
an eyepiece consisting of two plano-convex lenses, the plane sides of which both face the eye.
[ 1830-40; named after C. HUYGENS ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012