Lens system
AssigneeHon Hai Precision Industry Co., Ltd.
InventorKuan-Ting Chen
Life of this patent
Estimating the term…
Abstract
A lens system includes a first lens with positive refractive power and a second lens with positive refractive power, and an image plane. The first lens includes a first surface and a second surface from the object-side to the image-side of the lens system. The lens system satisfies the conditions: D/TTL>1.18; 1.5<F1/F<1.7; 0.15<R2/(F1)2<0.25; wherein, D is a diameter of an effective imaging range of the image plane; TTL is a total length of the lens system, R2 is a radius of curvature of the second surface, F1 is a focal length of the first lens; F is a focal length of the lens system.
Claims11
A lens system, in the order from the object-side to the image-side of the lens system, comprising:
- a first single lens having positive refraction power, the first lens, in order from the object-side to the image-side of the lens system, comprising a first surface and a second surface;
- a second single lens having positive refraction power;
- and
- an image plane;
- wherein the lens system satisfies the following conditions:
- D/TTL>1.18;
- 1.5<F1/F<1.7;
- 0.15<R2/(F1)2<0.25;
- wherein, D is a diameter of an effective imaging range of the image plane;
- TTL is a total length of the lens system, R2 is a radius of curvature of the second single surface, F1 is a focal length of the first single lens;
- F is a focal length of the lens system.
Dependencies are inferred from the claim text.