| 发明名称 | Imaging lens | ||
| 摘要 | A four element lens system for use with an imaging sensor includes first, second, third, and fourth lens elements and an optical filter that are arranged sequentially in order from an object side to an imaging side. The lens elements are coated with an anti-reflective film. The lens system further includes an optical filter that is disposed at a distance from the imaging sensor. The lens elements are relatively positioned to each other to satisfy specific conditions. The lens elements further include thickness to diameters ratios that satisfy specific conditions. | ||
| 申请公布号 | US8908296(B2) | 申请公布日期 | 2014.12.09 |
| 申请号 | US201414191316 | 申请日期 | 2014.02.26 |
| 申请人 | Genius Electronic Optical Co., Ltd. | 发明人 | Chen Shihhan |
| 分类号 | G02B9/34;G02B13/18;G02B13/00 | 主分类号 | G02B9/34 |
| 代理机构 | Kilpatrick Townsend & Stockton LLP | 代理人 | Kilpatrick Townsend & Stockton LLP |
| 主权项 | 1. An imaging lens comprising first, second, third, and fourth lens elements arranged in order from an object side to an imaging side, each of the first, second, third, and fourth lens elements having an object side surface facing toward the object side, and an imaging side surface facing toward the imaging side, wherein, 30<vd1−vd2, wherein vd1and vd2are Abbe numbers of the first and second lens elements, respectively; 0.4<d3avg/d4avg <0.7, wherein d3avg and d4avg are average diameters of the third and fourth lens elements, respectively; and a ratio of a sag at 5 percent point and a sag at 100 percent point of the imaging-side surface of the first lens element is in a range from -0.0082 to 0.0114. | ||
| 地址 | Taichung TW | ||