OBJECTIVE FOR CLOSE INFRARED AREA OF SPECTRUM Russian patent published in 2006 - IPC G02B13/14 G02B9/60 

FIELD: optics, possible use as objective for night vision devices.

SUBSTANCE: objective contains two components, first of which is force one, consists of flat-convex lens, directed by convexity to subject, double-glued meniscus, directed by convexity towards subject, and flat-concave lens, directed by concavity towards image. Second component - correcting one, consists of flat-convex lens and meniscus, directed by convexities towards subject, while number of glass marks in accordance to nomenclature does not exceed two.

EFFECT: increased technological coefficients due to simplified construction while maintaining high operation characteristics.

4 dwg