Lens Assembly
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorJian-Sin Chen
Life of this patent
Estimating the term…
Abstract
A lens assembly includes a first lens group, a second lens group, and a third lens group, all of which are arranged in order from an object side to an image side along an optical axis. The first lens group is with positive refractive power. The second lens group is with negative refractive power and includes at least two lenses. The third lens group is with positive refractive power and includes a 3-1 lens, a 3-2 lens, a 3-3 lens, and a 3-4 lens. Three lens groups are with refractive power. The 3-1 lens is a biconvex lens with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The 3-3 lens includes a concave surface facing the image side. Two lenses closest to the image side are meniscus lenses among the second lens group and the third lens group.
Claims18
A lens assembly comprising:
- a first lens group which is with positive refractive power;
- a second lens group which is with negative refractive power and comprises at least two lenses;
- and
- a third lens group which is with positive refractive power and comprises a 3-1 lens, a 3-2 lens, a 3-3 lens, and a 3-4 lens;
- wherein the first lens group, the second lens group, and the third lens group are arranged in order from an object side to an image side along an optical axis;
- wherein the lens groups of the lens assembly that are with refractive power are three in number;
- wherein the 3-1 lens, the 3-2 lens, the 3-3 lens, and the 3-4 lens are arranged in order from the object side to the image side along the optical axis;
- wherein the 3-1 lens is a biconvex lens with positive refractive power and comprises a convex surface facing the object side and another convex surface facing the image side;
- wherein the 3-3 lens comprises a concave surface facing the image side;
- wherein two lenses closest to the image side are meniscus lenses among the second lens group and the third lens group.
A lens assembly comprising:
- a first lens group which is with positive refractive power;
- a second lens group which is with negative refractive power;
- and
- a third lens group which is with positive refractive power;
- wherein the first lens group, the second lens group, and the third lens group are arranged in order from an object side to an image side along an optical axis;
- wherein the lens groups of the lens assembly that are with refractive power are three in number;
- wherein a lens closest to the object side in the third lens group is a biconvex lens with positive refractive power and comprises a convex surface facing the object side and another convex surface facing the image side;
- wherein two lenses closest to the image side in the second lens group are meniscus lenses;
- wherein the third lens group comprises a plurality of lenses and adjacent lenses among the lenses have opposite refractive powers.
A lens assembly comprising:
- a first lens group which is with positive refractive power;
- a second lens group which is with negative refractive power;
- and
- a third lens group which is with positive refractive power;
- wherein the first lens group, the second lens group, and the third lens group are arranged in order from an object side to an image side along an optical axis;
- wherein the lens groups of the lens assembly that are with refractive power are three in number;
- wherein a lens closest to the object side in the third lens group is a biconvex lens with positive refractive power and comprises a convex surface facing the object side and another convex surface facing the image side;
- wherein two lenses closest to the image side are meniscus lenses in the second lens group;
- wherein the second lens group or the third lens group comprises a plurality of lenses and adjacent lenses among the second lens group and the third lens group have opposite refractive powers;
- wherein the second lens group comprises a 2-1 lens, a 2-2 lens, and a 2-3 lens;
- wherein one of the 2-1 lens, the 2-2 lens, and the 2-3 lens is a biconcave lens and the other two are meniscus lenses;
- wherein the 2-1 lens and the 2-3 lens have the same refractive powers and the 2-1 lens and the 2-2 lens have opposite refractive powers;
- wherein a lens closest to the object side in the second lens group and a lens closest to the object side in the third lens group have opposite refractive powers.
Dependencies are inferred from the claim text.