| 发明名称 |
ZOOM LENS SYSTEM |
| 摘要 |
A zoom lens system capable of satisfactorily compensating for aberration, including, in an order from an object to an image, a first lens group having a negative refractive power, an aperture, and a second lens group having a positive refractive power, wherein the first lens group including a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, and wherein an Abbe number of the first lens is less than 30, an Abbe number of the second lens is greater than 45 and less than 65, and a ratio of an Abbe number of the third lens to an Abbe number of the fourth lens is greater than 3.8 and less than 4.3. |
| 申请公布号 |
US2015338621(A1) |
申请公布日期 |
2015.11.26 |
| 申请号 |
US201414547298 |
申请日期 |
2014.11.19 |
| 申请人 |
Hanwha Techwin Co., Ltd. |
发明人 |
JANG Jin Ho;CHOI Young Su |
| 分类号 |
G02B15/177;G02B13/00;G02B15/16 |
主分类号 |
G02B15/177 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A zoom lens system, in an order from an object to an image,
comprising: a first lens group having a negative refractive power; an aperture; and a second lens group having a positive refractive power, wherein the first lens group comprises a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, wherein an Abbe number of the first lens is less than 30, wherein an Abbe number of the second lens is greater than 45 and less than 65, and wherein a ratio of an Abbe number of the third lens to an Abbe number of the fourth lens is greater than 3.8 and less than 4.3. |
| 地址 |
Changwon-si KR |
