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US 2023/0065152 A1Published application
Imaging lens
AssigneeRays Optics Inc.
InventorChing-Lung Lai
Life of this patent
Estimating the term…
Abstract
An imaging lens including a first lens group and a second lens group. Each of the first lens group and the second lens group includes three lenses with refractive power. The first lens group includes two aspheric lenses and a glass lens, and an outermost lens surface of the first lens group facing an object side is a spherical surface. The second lens group includes an aspheric lens and a glass lens, and the second lens group includes a cemented surface. An aperture stop of the imaging lens is disposed between the first lens group and the second lens group.
Claims20
An imaging lens comprising:
- a first lens group and a second lens group, wherein the first lens group and the second lens group respectively comprise three lenses with refractive power;
- the lenses of the first lens group comprise two aspheric lenses and a glass lens, and an outermost lens surface of the first lens group facing an object side is a spherical surface;
- the lenses of the second lens group comprise an aspheric lens and a glass lens, and the second lens group comprises a cemented surface;
- an aperture stop of the imaging lens disposed between the first lens group and the second lens group;
- wherein the imaging lens meets the following conditions:
- 0.15 <EFL/LT<0.25 and 0.5<D1/LT<1.5;
- wherein EFL is an effective focal length of the imaging lens, LT is a distance on an optical axis between outermost two lens surfaces of the first lens group and the second lens group, and D1 is a diameter of an outermost surface of an outermost lens of the first lens group facing the object side.
4 more elements
An imaging lens comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side to an image side of the imaging lens, and an aperture stop disposed between the third lens and the fourth lens;
- wherein the first lens is a glass lens, and at least one of the fourth lens, the fifth lens, and the sixth lens is a glass lens;
- wherein the second lens from the image side in the imaging lens is a negative lens, the third lens from the image side is a positive lens, and an interval between the second lens from the image side and the third lens from the image side is less than 0.3 mm;
- wherein the imaging lens meets the following conditions at the same time:
- 0.5 <D1/LT<1.5;
- wherein LT is a distance on an optical axis between outermost two lens surfaces of the imaging lens, and D1 is a diameter of an outermost surface of the first lens.
3 more elements
Dependencies are inferred from the claim text.