LARGE-APERTURE LENS Russian patent published in 2011 - IPC G02B9/00 

FIELD: physics.

SUBSTANCE: lens has two components separated by an aperture diaphragm. The first component has a negative meniscus whose convex side faces the object space, consisting of a negative and a positive meniscus glued to each other, a biconvex lens consisting a glued convergent lens, consisting of a biconvex lens and a negative meniscus whose concave side faces the object space, and a negative meniscus whose convex side faces the object space. The second component contains a glued negative meniscus whose concave side faces the object space, consisting of a biconcave and a biconvex lens, a positive meniscus whose concave side faces the object space, a biconvex lens and a single positive meniscus whose convex side faces the object space.

EFFECT: increasing the linear field of vision to a S35 film format (25,5 × 18,6 mm) while simultaneously increasing the rear section and maintaining quality of the image.

3 cl, 1 dwg, 1 app