Lens system
AssigneeHon Hai Precision Industry Co., Ltd.
InventorsChun-Ling Lin, Chun-Hsiang Huang, Chung Lee
Life of this patent
Estimating the term…
Abstract
A lens system comprises a first lens positive in power, a second lens positive in power, a third lens negative in power, a fourth lens positive in power, and a fifth lens negative in power. The lens system meets a criteria of 1.6<TT/f<1.8, 1.6<f/f2<1.8, and −0.6<f/f5<−0.4, wherein TT denotes a distance between an object-side surface of the first lens and an image plane of the lens system; f2 denoting an effective focal length of the second lens; f denoting an effective focal length of the entire lens system.
Claims11
A lens system, from an object-side to an image-side of the lens system, comprising:
- a first lens positive in power,
- a second lens positive in power,
- a third lens negative in power,
- a fourth lens positive in power, and
- a fifth lens negative in power;
- the lens system meeting a criteria of 1.6<TT/f<1.8, 1.6<f/f2<1.8, and −0.6<f/f5<−0.4;
- wherein TT denotes a distance between an object-side surface of the first lens and an image plane of the lens system;
- f2 denoting an effective focal length of the second lens;
- and f denoting an effective focal length of the entire lens system.
Dependencies are inferred from the claim text.