LARGE-APERTURE LENS Russian patent published in 2009 - IPC G02B9/04

Abstract RU 2346312 C1

FIELD: physics; optics.

SUBSTANCE: lens consists of two components installed in succession along the beam path. The first component is double-lens, which consists of a double-convex lens and a negative meniscus lens glued together; convex side of the latter is at the image side. The second component is a single positive meniscus lens with its concave side to the image. |R₂|/|R₄|=1, |R₃|/|R₅|=1, where R₂, R₃, R₄, R₅ - radii of curvature of the 2^nd, the 3^rd, the 4^th and the 5^th optical faces, respectively, along the beam path.

EFFECT: increased focal distance, aperture ratio and enhanced producibility together with high image quality.

3 cl, 1 dwg

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RU 2 346 312 C1

Authors

Zubok Svetlana Nikolaevna

Shcheglov Sergej Ivanovich

Dates

2009-02-10—Published

2007-09-27—Filed