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US 12,529,872 B2Granted
Lens assembly and image capture apparatus thereof
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorsChun-Yang Yao, Hsi-Ling Chang
Life of this patent
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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 a first side to a second side along an optical axis. The first lens group is with positive refractive power. The second lens group is with positive refractive power. The third lens group is with positive refractive power. The first lens group is fixed, the second lens group can move along the optical axis, and the third lens group can move along the optical axis, so that the lens assembly is zoomed from a wide-angle end to a telephoto end to change an effective focal length.
Claims20
A lens assembly comprising:
- a first lens group which is with positive refractive power;
- a second lens group which is with positive 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 a first side to a second side along an optical axis;
- wherein the first lens group is fixed, the second lens group can move along the optical axis, and the third lens group can move along the optical axis, so that the lens assembly is zoomed from a wide-angle end to a telephoto end to change an effective focal length;
- wherein the lens assembly satisfies at least one of following conditions:
- 3<G12t/G23t<9;
- 3<G12t−G12w<6;
- 9 mm<EFLt−EFLw<13 mm;
- wherein G12w is an interval from the first lens group to the second lens group along the optical axis at the wide-angle end, G12t is an interval from the first lens group to the second lens group along the optical axis at the telephoto end, G23t is an interval from the second lens group to the third lens group along the optical axis at the telephoto end, EFLw is an effective focal length of the lens assembly at the wide-angle end, and EFLt is an effective focal length of the lens assembly at the telephoto end.
8 more elements
A lens assembly comprising:
- a first lens group which is with positive refractive power;
- a second lens group which is with positive 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 a first side to a second side along an optical axis;
- wherein the first lens group comprises a first lens, a second lens, and a third lens;
- the first lens, the second lens, and the third lens are arranged in order from the first side to the second side along the optical axis;
- the second lens group comprises a fourth lens and a fifth lens;
- the fourth lens and the fifth lens are arranged in order from the first side to the second side along the optical axis;
- the third lens group comprises a sixth lens, a seventh lens, and an eighth lens;
- and the sixth lens, the seventh lens, and the eighth lens are arranged in order from the first side to the second side along the optical axis;
- wherein the lens assembly further comprises a stop disposed between the first side and the second side and zooms from a wide-angle end to a telephoto end to change an effective focal length;
- wherein the lens assembly satisfies at least one of following conditions:
- 3<TTL/STD<5;
- 4<(f7+f8)/STD<12;
- 5<(f4+f5)/STD<8;
- 4.6<(EFLw+EFLt)/STD<7;
- wherein TTL is an interval from a first side surface of the first lens to an image plane along the optical axis, STD is an effective optical diameter of the stop, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f7 is an effective focal length of the seventh lens, f8 is an effective focal length of the eighth lens, EFLw is an effective focal length of the lens assembly at the wide-angle end, and EFLt is an effective focal length of the lens assembly at the telephoto end.
15 more elements
A lens assembly comprising:
- a first lens group which is with positive refractive power,
- a second lens group which is with positive 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 a first side to a second side along an optical axis;
- wherein the second lens group comprises a fourth lens and a fifth lens;
- the fourth lens and the fifth lens are arranged in order from the first side to the second side along the optical axis;
- the third lens group comprises a sixth lens, a seventh lens, and an eighth lens;
- and the sixth lens, the seventh lens, and the eighth lens are arranged in order from the first side to the second side along the optical axis;
- wherein the lens assembly zooms from a wide-angle end to a telephoto end to change an effective focal length and satisfies at least one of following conditions:
- 3<G12t/G23t<9;
- 3<G12t−G12w<6;
- 180 mm2<f7×f8<800 mm2;
- 250 mm2<f4×f5<350 mm2;
- wherein G12w is an interval from the first lens group to the second lens group along the optical axis at the wide-angle end, G12t is an interval from the first lens group to the second lens group along the optical axis at the telephoto end, G23t is an interval from the second lens group to the third lens group along the optical axis at the telephoto end, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f7 is an effective focal length of the seventh lens, and f8 is an effective focal length of the eighth lens.
12 more elements
Dependencies are inferred from the claim text.