| 发明名称 |
LENS ASSEMBLY APPLICABLE TO AN IMAGE SENSOR |
| 摘要 |
A lens assembly includes a first lens including a first convex surface facing the object side, a first concave surface with an aperture stop facing the image side; a second lens including a second convex surface facing the object side and a second concave surface facing the image side; a first lens further including. Defining that f, f1, f2 are a focal length of the lens assembly, the first lens, and the second lens; D is a distance between the first lens and the second lens; TTL is a total track length; R1 is a radius of the first convex surface; R2 is a radius of the first concave surface; R3 and R4 are respectively radius of the second convex surface and the second concave surface; and Φ is the image circle; the following conditions are satisfied: 0.01<|f/f2|<0.2; 0.1<R1/f1<0.5; 0.8<f1/TTL<1.1; 0.2<D/f<0.5; 0.3<R2/Φ<0.7; and 0.03<(R3−R4)/(R3+R4)<0.3. |
| 申请公布号 |
US2014218598(A1) |
申请公布日期 |
2014.08.07 |
| 申请号 |
US201313761159 |
申请日期 |
2013.02.07 |
| 申请人 |
POWER LENS TECHNOLOGY INC. |
发明人 |
Yeh Yi Chao;Chern Jyh Long |
| 分类号 |
G02B9/10;G02B13/00 |
主分类号 |
G02B9/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A lens assembly applicable to an image sensor, for capturing image from an object side and imaging on the image sensor, the lens assembly comprising a first lens and a second lens, wherein the first lens and the second lens are disposed in an optical axis in order from the object side, and the lens assembly is characterized in that:
the first lens includes positive refractive power, and the first lens further includes a first convex surface facing the object side and a first concave surface facing the image side; the second lens includes negative refractive power, and the second lens further includes a second convex surface facing the object side and a second concave surface facing the image side; the lens assembly further comprises an aperture stop, disposed on the first concave surface; wherein, f is a focal length of the lens assembly; f1 is focal length of the first lens; f2 is the focal length of the second lens; D is a distance between the first lens and the second lens; TTL is a total track length of the lens assembly; R1 is a radius of the first convex surface; R2 is a radius of the first concave surface; R3 and R4 are respectively radius of the second convex surface and the second concave surface; and Φ is the image circle the following conditions are satisfied:
0.01<|f/f2|<0.2;0.1<R1/f1<0.5;0.8<f1/TTL<1.1;0.2<D/f<0.5;0.3<R2/Φ<0.7; and0.03<(R3−R4)/(R3+R4)<0.3. |
| 地址 |
Hsinchu County TW |
