OBJECTIVE FOR NIGHT VISION DEVICE Russian patent published in 2009 - IPC G02B9/34 G02B13/14 

FIELD: optics.

SUBSTANCE: proposed objective can be used with electro-optical transducers, particularly zero generation electro optical transducers, with a spherical cathode. The objective contains, in the beam path, a first element in form of a single plane-convex lens, the convex side of which faces the object, and a second element, made in form of double convex and double concave lenses stuck together, the convex side of which faces the object, and a third element in form of a single positive meniscus, the convex surface of which faces the object and a fourth element in form of a symmetrical double concave lens.

EFFECT: improved quality of image in the region of high space frequencies, with compatibility with zero generation electro optical transducers with a spherical cathode.

6 dwg