Lens
AssigneeGenius Electonic Optical (Xiamen) Co. Ltd.
InventorTien-Ching Chen
Life of this patent
Estimating the term…
Abstract
A lens assembly, which is mounted on a digital still camera (DSC), comprises a fixed aperture, and a lens unit. The lens unit has a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence. The first lens is a biconcave lens disposed at the front side of the lens unit. The second lens is a biconvex lens. The third lens is a biconcave lens. The fourth lens is a positive meniscus lens. The fifth lens is a positive lens. The aperture is arranged between the first lens and the second lens.
Claims3
A lens assembly, comprising an aperture, and a lens unit having a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, said first lens being a biconcave lens disposed at said front side of said lens unit, said second lens being a biconvex lens, said third lens being a biconcave lens, said fourth lens being a positive meniscus lens, said fifth lens being a positive lens with a surface of facing said objective side having a curvature radius larger than the curvature radius of the opposite surface;
- said first lens and said fourth lens being made of plastic having at least one of which having a non-spherical surface, said second lens, said third lens and said fifth lens being made of glass and said aperture being arranged between said first lens and said second lens.
Dependencies are inferred from the claim text.