HIGH-SPEED LENS Russian patent published in 2021 - IPC G02B9/34 G02B13/14 

FIELD: optical systems.

SUBSTANCE: lens can be used in various optical systems, in particular working with a television charged-coupled device (CCD) matrix. A high-speed lens contains four components. The first component is a single biconvex lens. The second component is a single positive meniscus, facing the convexity to the object. The third component is a single flat-curved lens. The fourth component is a glued positive lens, consisting in the course of the rays of a biconvex lens and a negative meniscus, facing concavity to the object. The refractive indices and dispersion coefficients of the lens materials are related by the ratios given in the claim.

EFFECT: increased angular field in the space of objects with high image quality.

1 cl, 1 dwg, 4 tbl