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US 10,310,215 B2Granted
Lens assembly
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical International Ltd.
InventorHsi-Ling Chang
Life of this patent
Estimating the term…
Abstract
A lens assembly includes a fifth lens, a first lens, a second lens, a third lens and a fourth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The second lens is a biconcave lens. The third lens is a biconvex lens and made of glass material. The fourth lens includes a concave surface facing the object side.
Claims20
A lens assembly consisting of:
- a fifth lens which comprises a convex surface facing an object side and a concave surface facing an image side;
- a stop;
- a first lens which comprises a convex surface facing the image side;
- a second lens which is a biconcave lens;
- a third lens which is a biconvex lens and made of glass material;
- and
- a fourth lens which comprises a concave surface facing the object side;
- wherein the fifth lens, the stop, the first lens, the second lens, the third lens and the fourth lens are arranged in sequence from the object side to the image side along an optical axis;
- wherein the fifth lens is closer to the object side than the first lens, the second lens, the third lens and the fourth lens;
- wherein the first lens is disposed between the stop and the second lens;
- wherein the lens assembly is a fixed-focus lens assembly;
- wherein the lens assembly satisfies:
- 1.6≤F≤2.0
- wherein F is an f-number of the lens assembly.
11 more elements
A lens assembly consisting of:
- a fifth lens which comprises a convex surface facing an object side and a concave surface facing an image side;
- a sixth lens which comprises a convex surface facing the object side and a convex surface facing the image side;
- a stop;
- a first lens which is a biconvex lens;
- a second lens which is a biconcave lens;
- a third lens which is a biconvex lens and made of glass material;
- and
- a fourth lens which comprises a concave surface facing the object side and a concave surface facing the image side;
- wherein the fifth lens, the sixth lens, the stop, the first lens, the second lens, the third lens and the fourth lens are arranged in sequence from the object side to the image side along an optical axis;
- wherein the fifth lens is closer to the object side than the sixth lens, the first lens, the second lens, the third lens and the fourth lens;
- wherein the sixth lens is disposed between the fifth lens and the stop;
- wherein the first lens is disposed between the stop and the second lens;
- wherein the lens assembly satisfies:
- 1.6≤F≤2.0
- wherein F is an f-number of the lens assembly.
12 more elements
A lens assembly consisting of:
- a fifth lens which comprises a convex surface facing an object side and a concave surface facing an image side;
- a first lens which is a biconvex lens and disposed between the fifth lens and the second lens;
- a second lens which is a biconcave lens;
- a third lens which is a biconvex lens and made of glass material;
- and
- a fourth lens which comprises a concave surface facing the object side and a concave surface facing the image side;
- wherein a focus shift of the lens assembly is between 0 mm and 0.0033 mm as temperature increases from 20° C. to 50° C.;
- wherein the lens assembly satisfies:
- 120 degrees≤FOV≤168 degrees
- wherein FOV is a field of view of the lens assembly;
- wherein the lens assembly satisfies:
- 1.34 mm≤f≤2.777 mm
- wherein f is an effective focal length of the lens assembly;
- wherein the fifth lens, the first lens, the second lens, the third lens and the fourth lens are arranged in sequence from the object side to the image side along an optical axis
- wherein the fifth lens is closer to the object side than the first lens, the second lens, the third lens and the fourth lens.
12 more elements
Dependencies are inferred from the claim text.