| 发明名称 |
Zoom Lens and Image Pickup Apparatus Using the Same |
| 摘要 |
A zoom lens includes in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a negative refractive power, and the fourth lens unit includes at least two lenses. At the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, a distance between the third lens unit and the fourth lens unit fluctuates, and the first lens unit, after moving toward the image side, moves toward the object side. |
| 申请公布号 |
US2015212304(A1) |
申请公布日期 |
2015.07.30 |
| 申请号 |
US201514685213 |
申请日期 |
2015.04.13 |
| 申请人 |
OLYMPUS CORPORATION |
发明人 |
Takada Keisuke |
| 分类号 |
G02B15/16;H04N5/225;H04N5/232;G02B9/64;G02B13/00 |
主分类号 |
G02B15/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A zoom lens comprising in order from an object side to an image side:
a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a fourth lens unit having a negative refractive power, wherein the fourth lens unit includes at least two lenses, and at the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, and a distance between the third lens unit and the fourth lens unit fluctuates, and the total number of lens units included in the zoom lens is four, and the first lens unit, after moving toward the image side, moves toward the object side. |
| 地址 |
Tokyo JP |
