Huygens ocular


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Huy·gens oc·u·lar

(hoy'genz),
the compound ocular of a microscope, composed of two planoconvex lenses so arranged that the plane side of each is directed toward the observer.

Huygens,

Christian, Dutch physicist, 1629-1695.
Huygens ocular - the compound ocular of a microscope, composed of two planoconvex lenses so arranged that the plane side of each is directed toward the observer.
Huygens principle - used in ultrasound technology.