| 摘要 |
A zoom lens includes, in order from an object side to an image side, a first lens group, an aperture, and a second lens group. The first lens group has negative refractive power, and is composed of a negative first lens, a negative second lens, and a positive third lens. The third lens and the second lens are adhered together to form a negative doublet. The second lens group has positive refractive power, and is composed of a positive fourth lens, a negative fifth lens, a positive sixth lens, a positive seventh lens, a negative eighth lens, and a positive ninth lens. The sixth lens and the fifth lens are adhered together to form a negative doublet. In addition, the first lens group can be moved between the object side and the aperture, while the second lens group can be moved between the aperture and the image side. |
| 主权项 |
1. A zoom lens, in order from an object side to an image side along an optical axis, comprising:
a first lens group having negative refractive power, which is composed of a first lens, a second lens, and a third lens arranged sequentially from the object side to the image side, wherein the first lens has negative refractive power; the second lens has negative refractive power, the third lens has positive refractive power, and is adhered to the second lens to form a negative doublet, and wherein the first lens, the second lens, and the third lens are synchronously movable along the optical axis between the object side and an aperture; the aperture; and a second lens group having positive refractive power, which is composed of a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged sequentially from the object side to the image side, wherein the fourth lens has positive refractive power; the fifth lens has negative refractive power;power, the sixth lens has positive refractive power, and is adhered to the fifth lens to form a negative doublet, the seventh lens has positive refractive power, the eighth lens has negative refractive power, the ninth lens has positive refractive power, and wherein the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens are synchronously movable along the optical axis between the aperture and the image side. |
