PHOTOGRAPHIC LENS Russian patent published in 2017 - IPC G02B9/64 

FIELD: physics.

SUBSTANCE: lens contains two components, between which an aperture diaphragm is located. The first component comprises a biconvex and a biconcave lenses. The second component comprises a negative meniscus, which is concave to the image, two biconvex lenses and three negative menisci, which are convex to the image. A group of three first lenses of the second component can move along the optical axis.

EFFECT: increasing the linear view field and expanding the spectral range with preservation of image quality in the visible, near and short-wave IR ranges in the extended temperature range.

1 dwg, 1 tbl